cgminer.c

/*
 * Copyright 2011-2013 Con Kolivas
 * Copyright 2011-2012 Luke Dashjr
 * Copyright 2010 Jeff Garzik
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 3 of the License, or (at your option)
 * any later version.  See COPYING for more details.
 */

#include "config.h"

#ifdef HAVE_CURSES
#include <curses.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <stdint.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include <math.h>
#include <stdarg.h>
#include <assert.h>
#include <signal.h>
#include <limits.h>

#ifdef USE_USBUTILS
#include <semaphore.h>
#endif

#include <sys/stat.h>
#include <sys/types.h>

#ifndef WIN32
#include <sys/resource.h>
#else
#include <windows.h>
#endif
#include <ccan/opt/opt.h>
#include <jansson.h>
#ifdef HAVE_LIBCURL
#include <curl/curl.h>
#else
char *curly = ":D";
#endif
#include <libgen.h>
#include <sha2.h>

#include "compat.h"
#include "miner.h"
#include "findnonce.h"
#include "adl.h"
#include "driver-opencl.h"
#include "bench_block.h"
#include "scrypt.h"
#include "keccak.h"
#include "skein.h"

#ifdef USE_USBUTILS
#include "usbutils.h"
#endif

#if defined(unix) || defined(__APPLE__)
    #include <errno.h>
    #include <fcntl.h>
    #include <sys/wait.h>
#endif

#ifdef USE_AVALON
#include "driver-avalon.h"
#endif

#ifdef USE_BFLSC
#include "driver-bflsc.h"
#endif

#ifdef USE_HASHFAST
#include "driver-hashfast.h"
#endif

#if defined(USE_BITFORCE) || defined(USE_ICARUS) || defined(USE_AVALON) || defined(USE_MODMINER)
#   define USE_FPGA
#endif

struct strategies strategies[] = {
    { "Failover" },
    { "Round Robin" },
    { "Rotate" },
    { "Load Balance" },
    { "Balance" },
};

static char packagename[256];

bool opt_work_update;
bool opt_protocol;
static bool opt_benchmark;
bool have_longpoll;
bool want_per_device_stats;
bool use_syslog;
bool opt_quiet;
bool opt_realquiet;
bool opt_loginput;
bool opt_compact;
const int opt_cutofftemp = 95;
int opt_log_interval = 5;
int opt_queue = 1;
int opt_scantime = -1;
int opt_expiry = 120;
static const bool opt_time = true;
unsigned long long global_hashrate;
unsigned long global_quota_gcd = 1;

#if defined(HAVE_OPENCL) || defined(USE_USBUTILS)
int nDevs;
#endif
#ifdef HAVE_OPENCL
int opt_dynamic_interval = 7;
int opt_g_threads = -1;
int gpu_threads;
#ifdef USE_SCRYPT
bool opt_scrypt;
#endif
#ifdef USE_KECCAK
bool opt_keccak;
#endif
#ifdef USE_SKEIN
bool opt_skein;
#endif
#ifdef USE_HEAVY
bool opt_heavy;
char opt_vote[2];
char *opt_vote_hex;
#endif
#ifdef USE_HEFTY
bool opt_hefty;
#endif
#endif
bool opt_restart = true;
bool opt_nogpu;

struct list_head scan_devices;
static bool devices_enabled[MAX_DEVICES];
static int opt_devs_enabled;
static bool opt_display_devs;
static bool opt_removedisabled;
int total_devices;
int zombie_devs;
static int most_devices;
struct cgpu_info **devices;
bool have_opencl;
int mining_threads;
int num_processors;
#ifdef HAVE_CURSES
bool use_curses = true;
#else
bool use_curses;
#endif
static bool opt_submit_stale = true;
static int opt_shares;
bool opt_fail_only;
int opt_fail_switch_delay = 60;
static bool opt_fix_protocol;
static bool opt_lowmem;
static bool opt_morenotices;
bool opt_autofan;
bool opt_autoengine;
bool opt_noadl;
char *opt_api_allow = NULL;
char *opt_api_groups;
char *opt_api_description = PACKAGE_STRING;
int opt_api_port = 4028;
bool opt_api_listen;
bool opt_api_mcast;
char *opt_api_mcast_addr = API_MCAST_ADDR;
char *opt_api_mcast_code = API_MCAST_CODE;
char *opt_api_mcast_des = "";
int opt_api_mcast_port = 4028;
bool opt_api_network;
bool opt_delaynet;
bool opt_disable_pool;
static bool no_work;
char *opt_icarus_options = NULL;
char *opt_icarus_timing = NULL;
bool opt_worktime;
#ifdef USE_AVALON
char *opt_avalon_options = NULL;
char *opt_bitburner_fury_options = NULL;
#endif
#ifdef USE_KLONDIKE
char *opt_klondike_options = NULL;
#endif
#ifdef USE_USBUTILS
char *opt_usb_select = NULL;
int opt_usbdump = -1;
bool opt_usb_list_all;
cgsem_t usb_resource_sem;
static pthread_t usb_poll_thread;
static bool usb_polling;
#endif

char *opt_kernel_path;
char *cgminer_path;

#if defined(USE_BITFORCE)
bool opt_bfl_noncerange;
#endif
#define QUIET   (opt_quiet || opt_realquiet)

struct thr_info *control_thr;
struct thr_info **mining_thr;
static int gwsched_thr_id;
static int stage_thr_id;
static int watchpool_thr_id;
static int watchdog_thr_id;
#ifdef HAVE_CURSES
static int input_thr_id;
#endif
int gpur_thr_id;
static int api_thr_id;
#ifdef USE_USBUTILS
static int usbres_thr_id;
static int hotplug_thr_id;
#endif
static int total_control_threads;
bool hotplug_mode;
static int new_devices;
static int new_threads;
int hotplug_time = 5;

#if LOCK_TRACKING
pthread_mutex_t lockstat_lock;
#endif

#ifdef USE_USBUTILS
pthread_mutex_t cgusb_lock;
pthread_mutex_t cgusbres_lock;
cglock_t cgusb_fd_lock;
#endif

pthread_mutex_t hash_lock;
static pthread_mutex_t *stgd_lock;
pthread_mutex_t console_lock;
cglock_t ch_lock;
static pthread_rwlock_t blk_lock;
static pthread_mutex_t sshare_lock;

pthread_rwlock_t netacc_lock;
pthread_rwlock_t mining_thr_lock;
pthread_rwlock_t devices_lock;

static pthread_mutex_t lp_lock;
static pthread_cond_t lp_cond;

pthread_mutex_t restart_lock;
pthread_cond_t restart_cond;

pthread_cond_t gws_cond;

double total_rolling;
double total_mhashes_done;
static struct timeval total_tv_start, total_tv_end;

cglock_t control_lock;
pthread_mutex_t stats_lock;

int hw_errors;
int total_accepted, total_rejected, total_diff1;
int total_getworks, total_stale, total_discarded;
double total_diff_accepted, total_diff_rejected, total_diff_stale;
static int staged_rollable;
unsigned int new_blocks;
static unsigned int work_block;
unsigned int found_blocks;

unsigned int local_work;
unsigned int total_go, total_ro;

struct pool **pools;
static struct pool *currentpool = NULL;

int total_pools, enabled_pools;
enum pool_strategy pool_strategy = POOL_FAILOVER;
int opt_rotate_period;
static int total_urls, total_users, total_passes, total_userpasses, total_poolnames;

static
#ifndef HAVE_CURSES
const
#endif
bool curses_active;

#ifdef HAVE_CURSES
#if !(defined(PDCURSES) || defined(NCURSES_VERSION))
const
#endif
short default_bgcolor = COLOR_BLACK;
#endif

/* Protected by ch_lock */
char current_hash[68];
static char prev_block[12];
static char current_block[32];

static char datestamp[40];
static char blocktime[32];
struct timeval block_timeval;
static char best_share[8] = "0";
double current_diff = 0xFFFFFFFFFFFFFFFFULL;
static char block_diff[8];
uint64_t best_diff = 0;
static char block_poolname[256] = "";

struct block {
    char hash[68];
    UT_hash_handle hh;
    int block_no;
};

static struct block *blocks = NULL;


int swork_id;

/* For creating a hash database of stratum shares submitted that have not had
 * a response yet */
struct stratum_share {
    UT_hash_handle hh;
    bool block;
    struct work *work;
    int id;
    time_t sshare_time;
};

static struct stratum_share *stratum_shares = NULL;

char *opt_socks_proxy = NULL;

static const char def_conf[] = "cgminer.conf";
static char *default_config;
static bool config_loaded;
static int include_count;
#define JSON_INCLUDE_CONF "include"
#define JSON_LOAD_ERROR "JSON decode of file '%s' failed\n %s"
#define JSON_LOAD_ERROR_LEN strlen(JSON_LOAD_ERROR)
#define JSON_MAX_DEPTH 10
#define JSON_MAX_DEPTH_ERR "Too many levels of JSON includes (limit 10) or a loop"

#if defined(unix) || defined(__APPLE__)
    static char *opt_stderr_cmd = NULL;
    static int forkpid;
#endif // defined(unix)

struct sigaction termhandler, inthandler;

struct thread_q *getq;

static int total_work;
struct work *staged_work = NULL;

struct schedtime {
    bool enable;
    struct tm tm;
};

struct schedtime schedstart;
struct schedtime schedstop;
bool sched_paused;

static bool time_before(struct tm *tm1, struct tm *tm2)
{
    if (tm1->tm_hour < tm2->tm_hour)
        return true;
    if (tm1->tm_hour == tm2->tm_hour && tm1->tm_min < tm2->tm_min)
        return true;
    return false;
}

static bool should_run(void)
{
    struct timeval tv;
    struct tm *tm;

    if (!schedstart.enable && !schedstop.enable)
        return true;

    cgtime(&tv);
    const time_t tmp_time = tv.tv_sec;
    tm = localtime(&tmp_time);
    if (schedstart.enable) {
        if (!schedstop.enable) {
            if (time_before(tm, &schedstart.tm))
                return false;

            /* This is a once off event with no stop time set */
            schedstart.enable = false;
            return true;
        }
        if (time_before(&schedstart.tm, &schedstop.tm)) {
            if (time_before(tm, &schedstop.tm) && !time_before(tm, &schedstart.tm))
                return true;
            return false;
        } /* Times are reversed */
        if (time_before(tm, &schedstart.tm)) {
            if (time_before(tm, &schedstop.tm))
                return true;
            return false;
        }
        return true;
    }
    /* only schedstop.enable == true */
    if (!time_before(tm, &schedstop.tm))
        return false;
    return true;
}

void get_datestamp(char *f, size_t fsiz, struct timeval *tv)
{
    struct tm *tm;

    const time_t tmp_time = tv->tv_sec;
    tm = localtime(&tmp_time);
    snprintf(f, fsiz, "[%d-%02d-%02d %02d:%02d:%02d]",
        tm->tm_year + 1900,
        tm->tm_mon + 1,
        tm->tm_mday,
        tm->tm_hour,
        tm->tm_min,
        tm->tm_sec);
}

static void get_timestamp(char *f, size_t fsiz, struct timeval *tv)
{
    struct tm *tm;

    const time_t tmp_time = tv->tv_sec;
    tm = localtime(&tmp_time);
    snprintf(f, fsiz, "[%02d:%02d:%02d]",
        tm->tm_hour,
        tm->tm_min,
        tm->tm_sec);
}

static char exit_buf[512];

static void applog_and_exit(const char *fmt, ...)
{
    va_list ap;

    va_start(ap, fmt);
    vsnprintf(exit_buf, sizeof(exit_buf), fmt, ap);
    va_end(ap);
    _applog(LOG_ERR, exit_buf, true);
    exit(1);
}

static pthread_mutex_t sharelog_lock;
static FILE *sharelog_file = NULL;

static struct thr_info *__get_thread(int thr_id)
{
    return mining_thr[thr_id];
}

struct thr_info *get_thread(int thr_id)
{
    struct thr_info *thr;

    rd_lock(&mining_thr_lock);
    thr = __get_thread(thr_id);
    rd_unlock(&mining_thr_lock);

    return thr;
}

static struct cgpu_info *get_thr_cgpu(int thr_id)
{
    struct thr_info *thr = get_thread(thr_id);

    return thr->cgpu;
}

struct cgpu_info *get_devices(int id)
{
    struct cgpu_info *cgpu;

    rd_lock(&devices_lock);
    cgpu = devices[id];
    rd_unlock(&devices_lock);

    return cgpu;
}

static void sharelog(const char*disposition, const struct work*work)
{
    char *target, *hash, *data;
    struct cgpu_info *cgpu;
    unsigned long int t;
    struct pool *pool;
    int thr_id, rv;
    char s[1024];
    size_t ret;

    if (!sharelog_file)
        return;

    thr_id = work->thr_id;
    cgpu = get_thr_cgpu(thr_id);
    pool = work->pool;
    t = (unsigned long int)(work->tv_work_found.tv_sec);
    target = bin2hex(work->target, sizeof(work->target));
    hash = bin2hex(work->hash, sizeof(work->hash));
    data = bin2hex(work->data, sizeof(work->data));

    // timestamp,disposition,target,pool,dev,thr,sharehash,sharedata
    rv = snprintf(s, sizeof(s), "%lu,%s,%s,%s,%s%u,%u,%s,%s\n", t, disposition, target, pool->rpc_url, cgpu->drv->name, cgpu->device_id, thr_id, hash, data);
    free(target);
    free(hash);
    free(data);
    if (rv >= (int)(sizeof(s)))
        s[sizeof(s) - 1] = '\0';
    else if (rv < 0) {
        applog(LOG_ERR, "sharelog printf error");
        return;
    }

    mutex_lock(&sharelog_lock);
    ret = fwrite(s, rv, 1, sharelog_file);
    fflush(sharelog_file);
    mutex_unlock(&sharelog_lock);

    if (ret != 1)
        applog(LOG_ERR, "sharelog fwrite error");
}

static char *getwork_req = "{\"method\": \"getwork\", \"params\": [], \"id\":0}\n";

static char *gbt_req = "{\"id\": 0, \"method\": \"getblocktemplate\", \"params\": [{\"capabilities\": [\"coinbasetxn\", \"workid\", \"coinbase/append\"]}]}\n";

/* Adjust all the pools' quota to the greatest common denominator after a pool
 * has been added or the quotas changed. */
void adjust_quota_gcd(void)
{
    unsigned long gcd, lowest_quota = ~0UL, quota;
    struct pool *pool;
    int i;

    for (i = 0; i < total_pools; i++) {
        pool = pools[i];
        quota = pool->quota;
        if (!quota)
            continue;
        if (quota < lowest_quota)
            lowest_quota = quota;
    }

    if (likely(lowest_quota < ~0UL)) {
        gcd = lowest_quota;
        for (i = 0; i < total_pools; i++) {
            pool = pools[i];
            quota = pool->quota;
            if (!quota)
                continue;
            while (quota % gcd)
                gcd--;
        }
    } else
        gcd = 1;

    for (i = 0; i < total_pools; i++) {
        pool = pools[i];
        pool->quota_used *= global_quota_gcd;
        pool->quota_used /= gcd;
        pool->quota_gcd = pool->quota / gcd;
    }

    global_quota_gcd = gcd;
    applog(LOG_DEBUG, "Global quota greatest common denominator set to %lu", gcd);
}

/* Return value is ignored if not called from add_pool_details */
struct pool *add_pool(void)
{
    struct pool *pool;

    pool = calloc(sizeof(struct pool), 1);
    if (!pool)
        quit(1, "Failed to malloc pool in add_pool");
    pool->pool_no = pool->prio = total_pools;
    char buf[32];
    sprintf(buf, "Pool %d", pool->pool_no);
    pool->poolname = strdup(buf);
    pools = realloc(pools, sizeof(struct pool *) * (total_pools + 2));
    pools[total_pools++] = pool;
    mutex_init(&pool->pool_lock);
    if (unlikely(pthread_cond_init(&pool->cr_cond, NULL)))
        quit(1, "Failed to pthread_cond_init in add_pool");
    cglock_init(&pool->data_lock);
    mutex_init(&pool->stratum_lock);
    cglock_init(&pool->gbt_lock);
    INIT_LIST_HEAD(&pool->curlring);

    /* Make sure the pool doesn't think we've been idle since time 0 */
    pool->tv_idle.tv_sec = ~0UL;

    pool->rpc_req = getwork_req;
    pool->rpc_proxy = NULL;
    pool->quota = 1;
    adjust_quota_gcd();

    return pool;
}

/* Pool variant of test and set */
static bool pool_tset(struct pool *pool, bool *var)
{
    bool ret;

    mutex_lock(&pool->pool_lock);
    ret = *var;
    *var = true;
    mutex_unlock(&pool->pool_lock);

    return ret;
}

bool pool_tclear(struct pool *pool, bool *var)
{
    bool ret;

    mutex_lock(&pool->pool_lock);
    ret = *var;
    *var = false;
    mutex_unlock(&pool->pool_lock);

    return ret;
}

struct pool *current_pool(void)
{
    struct pool *pool;

    cg_rlock(&control_lock);
    pool = currentpool;
    cg_runlock(&control_lock);

    return pool;
}

char *set_int_range(const char *arg, int *i, int min, int max)
{
    char *err = opt_set_intval(arg, i);

    if (err)
        return err;

    if (*i < min || *i > max)
        return "Value out of range";

    return NULL;
}

static char *set_int_0_to_9999(const char *arg, int *i)
{
    return set_int_range(arg, i, 0, 9999);
}

static char *set_int_1_to_65535(const char *arg, int *i)
{
    return set_int_range(arg, i, 1, 65535);
}

static char *set_int_0_to_10(const char *arg, int *i)
{
    return set_int_range(arg, i, 0, 10);
}

#ifdef USE_AVALON
static char *set_int_0_to_100(const char *arg, int *i)
{
    return set_int_range(arg, i, 0, 100);
}
#endif

#ifdef USE_BFLSC
static char *set_int_0_to_200(const char *arg, int *i)
{
    return set_int_range(arg, i, 0, 200);
}
#endif

static char *set_int_1_to_10(const char *arg, int *i)
{
    return set_int_range(arg, i, 1, 10);
}

#ifdef USE_FPGA_SERIAL
static char *add_serial(char *arg)
{
    string_elist_add(arg, &scan_devices);
    return NULL;
}
#endif

#ifdef USE_HEAVY
static char *opt_set_vote(const char *arg, void *p)
{
    int t;
    uint16_t ts;
    char tc;
    char* result = set_int_range(arg, &t, 0, 1024); 
    if (result)
        t = 512;
    ts = (uint16_t) t;
    ts = be16toh(ts);
    opt_vote[1] = ts >> 8;
    opt_vote[0] = (unsigned char)(ts & 0xF);
    opt_vote_hex = bin2hex(opt_vote, 2);
    tc = opt_vote[0]; opt_vote[0] = opt_vote[1]; opt_vote[1] = tc;
    return NULL;
}
#endif
void get_intrange(char *arg, int *val1, int *val2)
{
    if (sscanf(arg, "%d-%d", val1, val2) == 1)
        *val2 = *val1;
}

void get_intexitval(char *arg, int *val1, int *val2)
{
    if (sscanf(arg, "%d:%d", val1, val2) == 1)
        *val2 = *val1;
}

void get_intrangeexitval(char *arg, int *val1, int *val2, int *val3)
{
    if (sscanf(arg, "%d:%d", val2, val3) == 2)
    {
        *val1 = *val2;
    }
    else if (sscanf(arg, "%d-%d:%d", val1, val2, val3) != 3)
    {
        get_intrange(arg, val1, val2);
        *val3 = *val2;
    }
}

static char *set_devices(char *arg)
{
    int i, val1 = 0, val2 = 0;
    char *nextptr;

    if (*arg) {
        if (*arg == '?') {
            opt_display_devs = true;
            return NULL;
        }
    } else
        return "Invalid device parameters";

    nextptr = strtok(arg, ",");
    if (nextptr == NULL)
        return "Invalid parameters for set devices";
    get_intrange(nextptr, &val1, &val2);
    if (val1 < 0 || val1 > MAX_DEVICES || val2 < 0 || val2 > MAX_DEVICES ||
        val1 > val2) {
        return "Invalid value passed to set devices";
    }

    for (i = val1; i <= val2; i++) {
        devices_enabled[i] = true;
        opt_devs_enabled++;
    }

    while ((nextptr = strtok(NULL, ",")) != NULL) {
        get_intrange(nextptr, &val1, &val2);
        if (val1 < 0 || val1 > MAX_DEVICES || val2 < 0 || val2 > MAX_DEVICES ||
        val1 > val2) {
            return "Invalid value passed to set devices";
        }

        for (i = val1; i <= val2; i++) {
            devices_enabled[i] = true;
            opt_devs_enabled++;
        }
    }

    return NULL;
}

static char *set_balance(enum pool_strategy *strategy)
{
    *strategy = POOL_BALANCE;
    return NULL;
}

static char *set_loadbalance(enum pool_strategy *strategy)
{
    *strategy = POOL_LOADBALANCE;
    return NULL;
}

static char *set_rotate(const char *arg, int *i)
{
    pool_strategy = POOL_ROTATE;
    return set_int_range(arg, i, 0, 9999);
}

static char *set_rr(enum pool_strategy *strategy)
{
    *strategy = POOL_ROUNDROBIN;
    return NULL;
}

/* Detect that url is for a stratum protocol either via the presence of
 * stratum+tcp or by detecting a stratum server response */
bool detect_stratum(struct pool *pool, char *url)
{
    if (!extract_sockaddr(url, &pool->sockaddr_url, &pool->stratum_port))
        return false;

    if (!strncasecmp(url, "stratum+tcp://", 14)) {
        pool->rpc_url = strdup(url);
        pool->has_stratum = true;
        pool->stratum_url = pool->sockaddr_url;
        return true;
    }

    return false;
}

static struct pool *add_url(void)
{
    total_urls++;
    if (total_urls > total_pools)
        add_pool();
    return pools[total_urls - 1];
}

static void setup_url(struct pool *pool, char *arg)
{
    arg = get_proxy(arg, pool);

    if (detect_stratum(pool, arg))
        return;

    opt_set_charp(arg, &pool->rpc_url);
    if (strncmp(arg, "http://", 7) &&
        strncmp(arg, "https://", 8)) {
        char *httpinput;

        httpinput = malloc(255);
        if (!httpinput)
            quit(1, "Failed to malloc httpinput");
        strcpy(httpinput, "http://");
        strncat(httpinput, arg, 248);
        pool->rpc_url = httpinput;
    }
}

static char *set_url(char *arg)
{
    struct pool *pool = add_url();

    setup_url(pool, arg);
    return NULL;
}

static char *set_poolname(char *arg)
{
    struct pool *pool;

    total_poolnames++;
    if (total_poolnames > total_pools)
        add_pool();

    pool = pools[total_poolnames - 1];
    opt_set_charp(arg, &pool->poolname);

    return NULL;
}

static char *set_quota(char *arg)
{
    char *semicolon = strchr(arg, ';'), *url;
    int len, qlen, quota;
    struct pool *pool;

    if (!semicolon)
        return "No semicolon separated quota;URL pair found";
    len = strlen(arg);
    *semicolon = '\0';
    qlen = strlen(arg);
    if (!qlen)
        return "No parameter for quota found";
    len -= qlen + 1;
    if (len < 1)
        return "No parameter for URL found";
    quota = atoi(arg);
    if (quota < 0)
        return "Invalid negative parameter for quota set";
    url = arg + qlen + 1;
    pool = add_url();
    setup_url(pool, url);
    pool->quota = quota;
    applog(LOG_INFO, "Setting %s to quota %d", pool->poolname, pool->quota);
    adjust_quota_gcd();

    return NULL;
}

static char *set_user(const char *arg)
{
    struct pool *pool;

    if (total_userpasses)
        return "Use only user + pass or userpass, but not both";
    total_users++;
    if (total_users > total_pools)
        add_pool();

    pool = pools[total_users - 1];
    opt_set_charp(arg, &pool->rpc_user);

    return NULL;
}

static char *set_pass(const char *arg)
{
    struct pool *pool;

    if (total_userpasses)
        return "Use only user + pass or userpass, but not both";
    total_passes++;
    if (total_passes > total_pools)
        add_pool();

    pool = pools[total_passes - 1];
    opt_set_charp(arg, &pool->rpc_pass);

    return NULL;
}

static char *set_userpass(const char *arg)
{
    struct pool *pool;
    char *updup;

    if (total_users || total_passes)
        return "Use only user + pass or userpass, but not both";
    total_userpasses++;
    if (total_userpasses > total_pools)
        add_pool();

    pool = pools[total_userpasses - 1];
    updup = strdup(arg);
    opt_set_charp(arg, &pool->rpc_userpass);
    pool->rpc_user = strtok(updup, ":");
    if (!pool->rpc_user)
        return "Failed to find : delimited user info";
    pool->rpc_pass = strtok(NULL, ":");
    if (!pool->rpc_pass)
        return "Failed to find : delimited pass info";

    return NULL;
}

static char *enable_debug(bool *flag)
{
    *flag = true;
    /* Turn on verbose output, too. */
    opt_log_output = true;
    return NULL;
}

static char *set_schedtime(const char *arg, struct schedtime *st)
{
    if (sscanf(arg, "%d:%d", &st->tm.tm_hour, &st->tm.tm_min) != 2)
        return "Invalid time set, should be HH:MM";
    if (st->tm.tm_hour > 23 || st->tm.tm_min > 59 || st->tm.tm_hour < 0 || st->tm.tm_min < 0)
        return "Invalid time set.";
    st->enable = true;
    return NULL;
}

static char* set_sharelog(char *arg)
{
    char *r = "";
    long int i = strtol(arg, &r, 10);

    if ((!*r) && i >= 0 && i <= INT_MAX) {
        sharelog_file = fdopen((int)i, "a");
        if (!sharelog_file)
            applog(LOG_ERR, "Failed to open fd %u for share log", (unsigned int)i);
    } else if (!strcmp(arg, "-")) {
        sharelog_file = stdout;
        if (!sharelog_file)
            applog(LOG_ERR, "Standard output missing for share log");
    } else {
        sharelog_file = fopen(arg, "a");
        if (!sharelog_file)
            applog(LOG_ERR, "Failed to open %s for share log", arg);
    }

    return NULL;
}

static char *temp_cutoff_str = NULL;

char *set_temp_cutoff(char *arg)
{
    int val;

    if (!(arg && arg[0]))
        return "Invalid parameters for set temp cutoff";
    val = atoi(arg);
    if (val < 0 || val > 200)
        return "Invalid value passed to set temp cutoff";
    temp_cutoff_str = arg;

    return NULL;
}

static void load_temp_cutoffs()
{
    int i, val = 0, device = 0;
    char *nextptr;

    if (temp_cutoff_str) {
        for (device = 0, nextptr = strtok(temp_cutoff_str, ","); nextptr; ++device, nextptr = strtok(NULL, ",")) {
            if (device >= total_devices)
                quit(1, "Too many values passed to set temp cutoff");
            val = atoi(nextptr);
            if (val < 0 || val > 200)
                quit(1, "Invalid value passed to set temp cutoff");

            rd_lock(&devices_lock);
            devices[device]->cutofftemp = val;
            rd_unlock(&devices_lock);
        }
    } else {
        rd_lock(&devices_lock);
        for (i = device; i < total_devices; ++i) {
            if (!devices[i]->cutofftemp)
                devices[i]->cutofftemp = opt_cutofftemp;
        }
        rd_unlock(&devices_lock);

        return;
    }
    if (device <= 1) {
        rd_lock(&devices_lock);
        for (i = device; i < total_devices; ++i)
            devices[i]->cutofftemp = val;
        rd_unlock(&devices_lock);
    }
}

static char *set_api_allow(const char *arg)
{
    opt_set_charp(arg, &opt_api_allow);

    return NULL;
}

static char *set_api_groups(const char *arg)
{
    opt_set_charp(arg, &opt_api_groups);

    return NULL;
}

static char *set_api_description(const char *arg)
{
    opt_set_charp(arg, &opt_api_description);

    return NULL;
}

static char *set_api_mcast_addr(const char *arg)
{
    opt_set_charp(arg, &opt_api_mcast_addr);

    return NULL;
}

static char *set_api_mcast_code(const char *arg)
{
    opt_set_charp(arg, &opt_api_mcast_code);

    return NULL;
}

static char *set_api_mcast_des(const char *arg)
{
    opt_set_charp(arg, &opt_api_mcast_des);

    return NULL;
}

#ifdef USE_ICARUS
static char *set_icarus_options(const char *arg)
{
    opt_set_charp(arg, &opt_icarus_options);

    return NULL;
}

static char *set_icarus_timing(const char *arg)
{
    opt_set_charp(arg, &opt_icarus_timing);

    return NULL;
}
#endif

#ifdef USE_AVALON
static char *set_avalon_options(const char *arg)
{
    opt_set_charp(arg, &opt_avalon_options);

    return NULL;
}

static char *set_bitburner_fury_options(const char *arg)
{
    opt_set_charp(arg, &opt_bitburner_fury_options);

    return NULL;
}
#endif

#ifdef USE_KLONDIKE
static char *set_klondike_options(const char *arg)
{
    opt_set_charp(arg, &opt_klondike_options);

    return NULL;
}
#endif

#ifdef USE_USBUTILS
static char *set_usb_select(const char *arg)
{
    opt_set_charp(arg, &opt_usb_select);

    return NULL;
}
#endif

static char *set_null(const char __maybe_unused *arg)
{
    return NULL;
}

/* These options are available from config file or commandline */
static struct opt_table opt_config_table[] = {
    OPT_WITH_ARG("--api-allow",
             set_api_allow, NULL, NULL,
             "Allow API access only to the given list of [G:]IP[/Prefix] addresses[/subnets]"),
    OPT_WITH_ARG("--api-description",
             set_api_description, NULL, NULL,
             "Description placed in the API status header, default: cgminer version"),
    OPT_WITH_ARG("--api-groups",
             set_api_groups, NULL, NULL,
             "API one letter groups G:cmd:cmd[,P:cmd:*...] defining the cmds a groups can use"),
    OPT_WITHOUT_ARG("--api-listen",
            opt_set_bool, &opt_api_listen,
            "Enable API, default: disabled"),
    OPT_WITHOUT_ARG("--api-mcast",
            opt_set_bool, &opt_api_mcast,
            "Enable API Multicast listener, default: disabled"),
    OPT_WITH_ARG("--api-mcast-addr",
             set_api_mcast_addr, NULL, NULL,
             "API Multicast listen address"),
    OPT_WITH_ARG("--api-mcast-code",
             set_api_mcast_code, NULL, NULL,
             "Code expected in the API Multicast message, don't use '-'"),
    OPT_WITH_ARG("--api-mcast-des",
             set_api_mcast_des, NULL, NULL,
             "Description appended to the API Multicast reply, default: ''"),
    OPT_WITH_ARG("--api-mcast-port",
             set_int_1_to_65535, opt_show_intval, &opt_api_mcast_port,
             "API Multicast listen port"),
    OPT_WITHOUT_ARG("--api-network",
            opt_set_bool, &opt_api_network,
            "Allow API (if enabled) to listen on/for any address, default: only 127.0.0.1"),
    OPT_WITH_ARG("--api-port",
             set_int_1_to_65535, opt_show_intval, &opt_api_port,
             "Port number of miner API"),
#ifdef HAVE_ADL
    OPT_WITHOUT_ARG("--auto-fan",
            opt_set_bool, &opt_autofan,
            "Automatically adjust all GPU fan speeds to maintain a target temperature"),
    OPT_WITHOUT_ARG("--auto-gpu",
            opt_set_bool, &opt_autoengine,
            "Automatically adjust all GPU engine clock speeds to maintain a target temperature"),
#endif
    OPT_WITHOUT_ARG("--balance",
             set_balance, &pool_strategy,
             "Change multipool strategy from failover to even share balance"),
    OPT_WITHOUT_ARG("--benchmark",
            opt_set_bool, &opt_benchmark,
            "Run cgminer in benchmark mode - produces no shares"),
#if defined(USE_BITFORCE)
    OPT_WITHOUT_ARG("--bfl-range",
            opt_set_bool, &opt_bfl_noncerange,
            "Use nonce range on bitforce devices if supported"),
#endif
#ifdef USE_BFLSC
    OPT_WITH_ARG("--bflsc-overheat",
             set_int_0_to_200, opt_show_intval, &opt_bflsc_overheat,
             "Set overheat temperature where BFLSC devices throttle, 0 to disable"),
#endif
#ifdef HAVE_CURSES
    OPT_WITHOUT_ARG("--compact",
            opt_set_bool, &opt_compact,
            "Use compact display without per device statistics"),
#endif
    OPT_WITHOUT_ARG("--debug|-D",
             enable_debug, &opt_debug,
             "Enable debug output"),
    OPT_WITH_ARG("--device|-d",
             set_devices, NULL, NULL,
                 "Select device to use, one value, range and/or comma separated (e.g. 0-2,4) default: all"),
    OPT_WITHOUT_ARG("--disable-gpu|-G",
            opt_set_bool, &opt_nogpu,
#ifdef HAVE_OPENCL
            "Disable GPU mining even if suitable devices exist"
#else
            opt_hidden
#endif
    ),
    OPT_WITHOUT_ARG("--disable-rejecting",
            opt_set_bool, &opt_disable_pool,
            "Automatically disable pools that continually reject shares"),
    OPT_WITH_ARG("--expiry|-E",
             set_int_0_to_9999, opt_show_intval, &opt_expiry,
             "Upper bound on how many seconds after getting work we consider a share from it stale"),
    OPT_WITHOUT_ARG("--failover-only",
            opt_set_bool, &opt_fail_only,
            "Don't leak work to backup pools when primary pool is lagging"),
    OPT_WITH_ARG("--failover-switch-delay",
            set_int_1_to_65535, opt_show_intval, &opt_fail_switch_delay,
            "Delay in seconds before switching back to a failed pool"),
    OPT_WITHOUT_ARG("--fix-protocol",
            opt_set_bool, &opt_fix_protocol,
            "Do not redirect to a different getwork protocol (eg. stratum)"),
#ifdef HAVE_OPENCL
    OPT_WITH_ARG("--gpu-dyninterval",
             set_int_1_to_65535, opt_show_intval, &opt_dynamic_interval,
             "Set the refresh interval in ms for GPUs using dynamic intensity"),
    OPT_WITH_ARG("--gpu-platform",
             set_int_0_to_9999, opt_show_intval, &opt_platform_id,
             "Select OpenCL platform ID to use for GPU mining"),
#ifdef USE_SCRYPT
    OPT_WITH_ARG("--gpu-threads|-g",
             set_gpu_threads, NULL, NULL,
             "Number of threads per GPU - one value or comma separated list (e.g. 1,2,1)"),
#else
    OPT_WITH_ARG("--gpu-threads|-g",
             set_int_1_to_10, opt_show_intval, &opt_g_threads,
             "Number of threads per GPU (1 - 10)"),
#endif
#ifdef HAVE_ADL
    OPT_WITH_ARG("--gpu-engine",
             set_gpu_engine, NULL, NULL,
             "GPU engine (over)clock range in Mhz - one value, range and/or comma separated list (e.g. 850-900,900,750-850)"),
    OPT_WITH_ARG("--gpu-fan",
             set_gpu_fan, NULL, NULL,
             "GPU fan percentage range - one value, range and/or comma separated list (e.g. 0-85,85,65)"),
    OPT_WITH_ARG("--gpu-map",
             set_gpu_map, NULL, NULL,
             "Map OpenCL to ADL device order manually, paired CSV (e.g. 1:0,2:1 maps OpenCL 1 to ADL 0, 2 to 1)"),
    OPT_WITH_ARG("--gpu-memclock",
             set_gpu_memclock, NULL, NULL,
             "Set the GPU memory (over)clock in Mhz - one value for all or separate by commas for per card"),
    OPT_WITH_ARG("--gpu-memdiff",
             set_gpu_memdiff, NULL, NULL,
             "Set a fixed difference in clock speed between the GPU and memory in auto-gpu mode"),
    OPT_WITH_ARG("--gpu-powertune",
             set_gpu_powertune, NULL, NULL,
             "Set the GPU powertune percentage - one value for all or separate by commas for per card"),
    OPT_WITHOUT_ARG("--gpu-reorder",
            opt_set_bool, &opt_reorder,
            "Attempt to reorder GPU devices according to PCI Bus ID"),
    OPT_WITH_ARG("--gpu-vddc",
             set_gpu_vddc, NULL, NULL,
             "Set the GPU voltage in Volts - one value for all or separate by commas for per card"),
#endif
    OPT_WITH_ARG("--xintensity|-X",
             set_xintensity, NULL, NULL,
             "Shader based intensity of GPU scanning (" MIN_XINTENSITY_STR " to "
             MAX_XINTENSITY_STR "), overrides --intensity|-I and -rawintensity."),
#ifdef USE_SCRYPT
    OPT_WITH_ARG("--lookup-gap",
             set_lookup_gap, NULL, NULL,
             "Set GPU lookup gap for scrypt mining, comma separated"),
    OPT_WITH_ARG("--intensity|-I",
             set_intensity, NULL, NULL,
             "Intensity of GPU scanning (d or " MIN_SHA_INTENSITY_STR
             " -> " MAX_SCRYPT_INTENSITY_STR
             ",default: d to maintain desktop interactivity)"),
    OPT_WITH_ARG("--rawintensity",
             set_rawintensity, NULL, NULL,
             "Raw intensity of GPU scanning (" MIN_RAWINTENSITY_STR " to "
             MAX_RAWINTENSITY_STR "), overrides --intensity|-I and --xintensity|-X."),
#else
    OPT_WITH_ARG("--intensity|-I",
             set_intensity, NULL, NULL,
             "Intensity of GPU scanning (d or " MIN_SHA_INTENSITY_STR
             " -> " MAX_SHA_INTENSITY_STR
             ",default: d to maintain desktop interactivity)"),
#endif
#endif
    OPT_WITH_ARG("--hotplug",
             set_int_0_to_9999, NULL, &hotplug_time,
#ifdef USE_USBUTILS
             "Seconds between hotplug checks (0 means never check)"
#else
             opt_hidden
#endif
            ),
#if defined(HAVE_OPENCL) || defined(HAVE_MODMINER)
    OPT_WITH_ARG("--kernel-path|-K",
             opt_set_charp, opt_show_charp, &opt_kernel_path,
                 "Specify a path to where bitstream and kernel files are"),
#endif
#ifdef HAVE_OPENCL
    OPT_WITH_ARG("--kernel|-k",
             set_kernel, NULL, NULL,
             "Override sha256 kernel to use (diablo, poclbm, phatk or diakgcn) - one value or comma separated"),
#endif
#ifdef USE_ICARUS
    OPT_WITH_ARG("--icarus-options",
             set_icarus_options, NULL, NULL,
             opt_hidden),
    OPT_WITH_ARG("--icarus-timing",
             set_icarus_timing, NULL, NULL,
             opt_hidden),
#endif
#ifdef USE_AVALON
    OPT_WITHOUT_ARG("--avalon-auto",
            opt_set_bool, &opt_avalon_auto,
            "Adjust avalon overclock frequency dynamically for best hashrate"),
    OPT_WITH_ARG("--avalon-cutoff",
             set_int_0_to_100, opt_show_intval, &opt_avalon_overheat,
             "Set avalon overheat cut off temperature"),
    OPT_WITH_ARG("--avalon-fan",
             set_avalon_fan, NULL, NULL,
             "Set fanspeed percentage for avalon, single value or range (default: 20-100)"),
    OPT_WITH_ARG("--avalon-freq",
             set_avalon_freq, NULL, NULL,
             "Set frequency range for avalon-auto, single value or range"),
    OPT_WITH_ARG("--avalon-options",
             set_avalon_options, NULL, NULL,
             "Set avalon options baud:miners:asic:timeout:freq"),
    OPT_WITH_ARG("--avalon-temp",
             set_int_0_to_100, opt_show_intval, &opt_avalon_temp,
             "Set avalon target temperature"),
    OPT_WITH_ARG("--bitburner-voltage",
             opt_set_intval, NULL, &opt_bitburner_core_voltage,
             "Set BitBurner (Avalon) core voltage, in millivolts"),
    OPT_WITH_ARG("--bitburner-fury-voltage",
             opt_set_intval, NULL, &opt_bitburner_fury_core_voltage,
             "Set BitBurner Fury core voltage, in millivolts"),
    OPT_WITH_ARG("--bitburner-fury-options",
             set_bitburner_fury_options, NULL, NULL,
             "Override avalon-options for BitBurner Fury boards baud:miners:asic:timeout:freq"),
#endif
#ifdef USE_KLONDIKE
    OPT_WITH_ARG("--klondike-options",
             set_klondike_options, NULL, NULL,
             "Set klondike options clock:temptarget"),
#endif
    OPT_WITHOUT_ARG("--more-notices",
            opt_set_bool, &opt_morenotices,
            "Shows work restart and new block notices, hidden by default"),
    OPT_WITHOUT_ARG("--load-balance",
             set_loadbalance, &pool_strategy,
             "Change multipool strategy from failover to quota based balance"),
    OPT_WITH_ARG("--log|-l",
             set_int_0_to_9999, opt_show_intval, &opt_log_interval,
             "Interval in seconds between log output"),
    OPT_WITH_ARG("--log-dateformat",
             set_int_0_to_10, opt_show_intval, &opt_log_dateformat,
             "Set log dateformat (0 or 1) - 0 is time only, 1 is full date and time."),
    OPT_WITHOUT_ARG("--lowmem",
            opt_set_bool, &opt_lowmem,
            "Minimise caching of shares for low memory applications"),
#if defined(unix) || defined(__APPLE__)
    OPT_WITH_ARG("--monitor|-m",
             opt_set_charp, NULL, &opt_stderr_cmd,
             "Use custom pipe cmd for output messages"),
#endif // defined(unix)
    OPT_WITHOUT_ARG("--net-delay",
            opt_set_bool, &opt_delaynet,
            "Impose small delays in networking to not overload slow routers"),
    OPT_WITHOUT_ARG("--no-adl",
            opt_set_bool, &opt_noadl,
#ifdef HAVE_ADL
            "Disable the ATI display library used for monitoring and setting GPU parameters"
#else
            opt_hidden
#endif
            ),
    OPT_WITHOUT_ARG("--no-pool-disable",
            opt_set_invbool, &opt_disable_pool,
            opt_hidden),
    OPT_WITHOUT_ARG("--no-restart",
            opt_set_invbool, &opt_restart,
#ifdef HAVE_OPENCL
            "Do not attempt to restart GPUs that hang"
#else
            opt_hidden
#endif
    ),
    OPT_WITHOUT_ARG("--no-submit-stale",
            opt_set_invbool, &opt_submit_stale,
                "Don't submit shares if they are detected as stale"),
    OPT_WITH_ARG("--pass|-p",
             set_pass, NULL, NULL,
             "Password for bitcoin JSON-RPC server"),
    OPT_WITHOUT_ARG("--per-device-stats",
            opt_set_bool, &want_per_device_stats,
            "Force verbose mode and output per-device statistics"),
    OPT_WITH_ARG("--poolname|--name",
             set_poolname, NULL, NULL,
             "Name of pool."),
    OPT_WITHOUT_ARG("--protocol-dump|-P",
            opt_set_bool, &opt_protocol,
            "Verbose dump of protocol-level activities"),
    OPT_WITH_ARG("--queue|-Q",
             set_int_0_to_9999, opt_show_intval, &opt_queue,
             "Minimum number of work items to have queued (0+)"),
    OPT_WITHOUT_ARG("--quiet|-q",
            opt_set_bool, &opt_quiet,
            "Disable logging output, display status and errors"),
    OPT_WITH_ARG("--quota|-U",
             set_quota, NULL, NULL,
             "quota;URL combination for server with load-balance strategy quotas"),
    OPT_WITHOUT_ARG("--real-quiet",
            opt_set_bool, &opt_realquiet,
            "Disable all output"),
    OPT_WITHOUT_ARG("--remove-disabled",
             opt_set_bool, &opt_removedisabled,
             "Remove disabled devices entirely, as if they didn't exist"),
    OPT_WITH_ARG("--retries",
             set_null, NULL, NULL,
             opt_hidden),
    OPT_WITH_ARG("--retry-pause",
             set_null, NULL, NULL,
             opt_hidden),
    OPT_WITH_ARG("--rotate",
             set_rotate, opt_show_intval, &opt_rotate_period,
             "Change multipool strategy from failover to regularly rotate at N minutes"),
    OPT_WITHOUT_ARG("--round-robin",
             set_rr, &pool_strategy,
             "Change multipool strategy from failover to round robin on failure"),
#ifdef USE_FPGA_SERIAL
    OPT_WITH_ARG("--scan-serial|-S",
             add_serial, NULL, NULL,
             "Serial port to probe for Serial FPGA Mining device"),
#endif
    OPT_WITH_ARG("--scan-time|-s",
             set_int_0_to_9999, opt_show_intval, &opt_scantime,
             "Upper bound on time spent scanning current work, in seconds"),
    OPT_WITH_ARG("--sched-start",
             set_schedtime, NULL, &schedstart,
             "Set a time of day in HH:MM to start mining (a once off without a stop time)"),
    OPT_WITH_ARG("--sched-stop",
             set_schedtime, NULL, &schedstop,
             "Set a time of day in HH:MM to stop mining (will quit without a start time)"),
#ifdef USE_SCRYPT
    OPT_WITHOUT_ARG("--scrypt",
            opt_set_bool, &opt_scrypt,
            "Use the scrypt algorithm for mining"),
    OPT_WITH_ARG("--cl-filename",
             set_cl_filename, NULL, NULL,
             "Sets the kernel .cl filename WITHOUT FILE EXTENSION - one value or comma separated list (e.g. scrypt130511_lantis,scrypt130511,scrypt130511_alexey)"),
    OPT_WITH_ARG("--shaders",
             set_shaders, NULL, NULL,
             "GPU shaders per card for tuning scrypt, comma separated"),
#endif
#ifdef USE_KECCAK
    OPT_WITHOUT_ARG("--keccak",
            opt_set_bool, &opt_keccak,
            "Use the keccak algorithm for mining (maxcoin)"),
#endif
#ifdef USE_SKEIN
    OPT_WITHOUT_ARG("--skein",
            opt_set_bool, &opt_skein,
            "Use the skein algorithm for mining (skeincoin)"),
#endif
#ifdef USE_HEAVY
    OPT_WITHOUT_ARG("--heavy",
            opt_set_bool, &opt_heavy,
            "Use the heavyhash algorithm for mining (heavycoin)"),
    OPT_WITH_ARG("--vote",
             opt_set_vote, NULL, NULL,
             "Heavycoin vote"),
#endif
#ifdef USE_HEFTY
    OPT_WITHOUT_ARG("--hefty",
            opt_set_bool, &opt_hefty,
            "Use the hefty algorithm for mining (mjollnircoin)"),
#endif
    OPT_WITH_ARG("--sharelog",
             set_sharelog, NULL, NULL,
             "Append share log to file"),
    OPT_WITH_ARG("--shares",
             opt_set_intval, NULL, &opt_shares,
             "Quit after mining N shares (default: unlimited)"),
    OPT_WITH_ARG("--socks-proxy",
             opt_set_charp, NULL, &opt_socks_proxy,
             "Set socks4 proxy (host:port)"),
#ifdef HAVE_SYSLOG_H
    OPT_WITHOUT_ARG("--syslog",
            opt_set_bool, &use_syslog,
            "Use system log for output messages (default: standard error)"),
#endif
#if defined(HAVE_ADL) || defined(USE_BITFORCE) || defined(USE_MODMINER) || defined(USE_BFLSC)
    OPT_WITH_ARG("--temp-cutoff",
             set_temp_cutoff, opt_show_intval, &opt_cutofftemp,
             "Temperature where a device will be automatically disabled, one value or comma separated list"),
#endif
#ifdef HAVE_ADL
    OPT_WITH_ARG("--temp-hysteresis",
             set_int_1_to_10, opt_show_intval, &opt_hysteresis,
             "Set how much the temperature can fluctuate outside limits when automanaging speeds"),
    OPT_WITH_ARG("--temp-overheat",
             set_temp_overheat, opt_show_intval, &opt_overheattemp,
             "Overheat temperature when automatically managing fan and GPU speeds, one value or comma separated list"),
    OPT_WITH_ARG("--temp-target",
             set_temp_target, opt_show_intval, &opt_targettemp,
             "Target temperature when automatically managing fan and GPU speeds, one value or comma separated list"),
#endif
    OPT_WITHOUT_ARG("--text-only|-T",
            opt_set_invbool, &use_curses,
#ifdef HAVE_CURSES
            "Disable ncurses formatted screen output"
#else
            opt_hidden
#endif
    ),
#ifdef USE_SCRYPT
    OPT_WITH_ARG("--thread-concurrency",
             set_thread_concurrency, NULL, NULL,
             "Set GPU thread concurrency for scrypt mining, comma separated"),
#endif
    OPT_WITH_ARG("--url|-o",
             set_url, NULL, NULL,
             "URL for bitcoin JSON-RPC server"),
    OPT_WITH_ARG("--user|-u",
             set_user, NULL, NULL,
             "Username for bitcoin JSON-RPC server"),
#ifdef USE_USBUTILS
    OPT_WITH_ARG("--usb",
             set_usb_select, NULL, NULL,
             "USB device selection"),
    OPT_WITH_ARG("--usb-dump",
             set_int_0_to_10, opt_show_intval, &opt_usbdump,
             opt_hidden),
    OPT_WITHOUT_ARG("--usb-list-all",
            opt_set_bool, &opt_usb_list_all,
            opt_hidden),
#endif
#ifdef HAVE_OPENCL
    OPT_WITH_ARG("--vectors|-v",
             set_vector, NULL, NULL,
             "Override detected optimal vector (1, 2 or 4) - one value or comma separated list"),
#endif
    OPT_WITHOUT_ARG("--verbose",
            opt_set_bool, &opt_log_output,
            "Log verbose output to stderr as well as status output"),
#ifdef HAVE_OPENCL
    OPT_WITH_ARG("--worksize|-w",
             set_worksize, NULL, NULL,
             "Override detected optimal worksize - one value or comma separated list"),
#endif
    OPT_WITH_ARG("--userpass|-O",
             set_userpass, NULL, NULL,
             "Username:Password pair for bitcoin JSON-RPC server"),
    OPT_WITHOUT_ARG("--worktime",
            opt_set_bool, &opt_worktime,
            "Display extra work time debug information"),
    OPT_WITH_ARG("--pools",
            opt_set_bool, NULL, NULL, opt_hidden),
    OPT_ENDTABLE
};

static char *load_config(const char *arg, void __maybe_unused *unused);

static int fileconf_load;

static char *parse_config(json_t *config, bool fileconf)
{
    static char err_buf[200];
    struct opt_table *opt;
    json_t *val;

    if (fileconf && !fileconf_load)
        fileconf_load = 1;

    for (opt = opt_config_table; opt->type != OPT_END; opt++) {
        char *p, *name;

        /* We don't handle subtables. */
        assert(!(opt->type & OPT_SUBTABLE));

        if (!opt->names)
            continue;

        /* Pull apart the option name(s). */
        name = strdup(opt->names);
        for (p = strtok(name, "|"); p; p = strtok(NULL, "|")) {
            char *err = NULL;

            /* Ignore short options. */
            if (p[1] != '-')
                continue;

            val = json_object_get(config, p+2);
            if (!val)
                continue;

            if ((opt->type & OPT_HASARG) && json_is_string(val)) {
                err = opt->cb_arg(json_string_value(val),
                          opt->u.arg);
            } else if ((opt->type & OPT_HASARG) && json_is_array(val)) {
                int n, size = json_array_size(val);

                for (n = 0; n < size && !err; n++) {
                    if (json_is_string(json_array_get(val, n)))
                        err = opt->cb_arg(json_string_value(json_array_get(val, n)), opt->u.arg);
                    else if (json_is_object(json_array_get(val, n)))
                        err = parse_config(json_array_get(val, n), false);
                }
            } else if ((opt->type & OPT_NOARG) && json_is_true(val))
                err = opt->cb(opt->u.arg);
            else
                err = "Invalid value";

            if (err) {
                /* Allow invalid values to be in configuration
                 * file, just skipping over them provided the
                 * JSON is still valid after that. */
                if (fileconf) {
                    applog(LOG_ERR, "Invalid config option %s: %s", p, err);
                    fileconf_load = -1;
                } else {
                    snprintf(err_buf, sizeof(err_buf), "Parsing JSON option %s: %s",
                        p, err);
                    return err_buf;
                }
            }
        }
        free(name);
    }

    val = json_object_get(config, JSON_INCLUDE_CONF);
    if (val && json_is_string(val))
        return load_config(json_string_value(val), NULL);

    return NULL;
}

char *cnfbuf = NULL;

static char *load_config(const char *arg, void __maybe_unused *unused)
{
    json_error_t err;
    json_t *config;
    char *json_error;
    size_t siz;

    if (!cnfbuf)
        cnfbuf = strdup(arg);

    if (++include_count > JSON_MAX_DEPTH)
        return JSON_MAX_DEPTH_ERR;

#if JANSSON_MAJOR_VERSION > 1
    config = json_load_file(arg, 0, &err);
#else
    config = json_load_file(arg, &err);
#endif
    if (!json_is_object(config)) {
        siz = JSON_LOAD_ERROR_LEN + strlen(arg) + strlen(err.text);
        json_error = malloc(siz);
        if (!json_error)
            quit(1, "Malloc failure in json error");

        snprintf(json_error, siz, JSON_LOAD_ERROR, arg, err.text);
        return json_error;
    }

    config_loaded = true;

    /* Parse the config now, so we can override it.  That can keep pointers
     * so don't free config object. */
    return parse_config(config, true);
}

static char *set_default_config(const char *arg)
{
    opt_set_charp(arg, &default_config);

    return NULL;
}

void default_save_file(char *filename);

static void load_default_config(void)
{
    cnfbuf = malloc(PATH_MAX);

    default_save_file(cnfbuf);

    if (!access(cnfbuf, R_OK))
        load_config(cnfbuf, NULL);
    else {
        free(cnfbuf);
        cnfbuf = NULL;
    }
}

extern const char *opt_argv0;

static char *opt_verusage_and_exit(const char *extra)
{
    printf("%s\nBuilt with "
#ifdef USE_AVALON
        "avalon "
#endif
#ifdef USE_BFLSC
        "bflsc "
#endif
#ifdef USE_BITFORCE
        "bitforce "
#endif
#ifdef USE_BITFURY
        "bitfury "
#endif
#ifdef HAVE_OPENCL
        "GPU "
#endif
#ifdef USE_HASHFAST
        "hashfast "
#endif
#ifdef USE_ICARUS
        "icarus "
#endif
#ifdef USE_KLONDIKE
        "klondike "
#endif
#ifdef USE_KNC
        "KnC "
#endif
#ifdef USE_MODMINER
        "modminer "
#endif
#ifdef USE_SCRYPT
        "scrypt "
#endif
#ifdef USE_KECCAK
        "keccak "
#endif
#ifdef USE_SKEIN
        "skein "
#endif
        "mining support.\n"
        , packagename);
    printf("%s", opt_usage(opt_argv0, extra));
    fflush(stdout);
    exit(0);
}

#if defined(HAVE_OPENCL) || defined(USE_USBUTILS)
char *display_devs(int *ndevs)
{
    *ndevs = 0;
#ifdef HAVE_OPENCL
    print_ndevs(ndevs);
#endif
#ifdef USE_USBUTILS
    usb_all(0);
#endif
    exit(*ndevs);
}
#endif

/* These options are available from commandline only */
static struct opt_table opt_cmdline_table[] = {
    OPT_WITH_ARG("--config|-c",
             load_config, NULL, NULL,
             "Load a JSON-format configuration file\n"
             "See example.conf for an example configuration."),
    OPT_WITH_ARG("--default-config",
             set_default_config, NULL, NULL,
             "Specify the filename of the default config file\n"
             "Loaded at start and used when saving without a name."),
    OPT_WITHOUT_ARG("--help|-h",
            opt_verusage_and_exit, NULL,
            "Print this message"),
#if defined(HAVE_OPENCL) || defined(USE_USBUTILS)
    OPT_WITHOUT_ARG("--ndevs|-n",
            display_devs, &nDevs,
            "Display "
#ifdef HAVE_OPENCL
            "number of detected GPUs, OpenCL platform information, "
#endif
#ifdef USE_USBUTILS
            "all USB devices, "
#endif
            "and exit"),
#endif
    OPT_WITHOUT_ARG("--version|-V",
            opt_version_and_exit, packagename,
            "Display version and exit"),
    OPT_ENDTABLE
};

#ifdef HAVE_LIBCURL
static bool jobj_binary(const json_t *obj, const char *key,
            void *buf, size_t buflen, bool required)
{
    const char *hexstr;
    json_t *tmp;

    tmp = json_object_get(obj, key);
    if (unlikely(!tmp)) {
        if (unlikely(required))
            applog(LOG_ERR, "JSON key '%s' not found", key);
        return false;
    }
    hexstr = json_string_value(tmp);
    if (unlikely(!hexstr)) {
        applog(LOG_ERR, "JSON key '%s' is not a string", key);
        return false;
    }
    if (!hex2bin(buf, hexstr, buflen))
        return false;

    return true;
}
#endif

static void calc_midstate(struct work *work)
{
    unsigned char data[64];
    uint32_t *data32 = (uint32_t *)data;
    sha256_ctx ctx;

    flip64(data32, work->data);
    sha256_init(&ctx);
    sha256_update(&ctx, data, 64);
    memcpy(work->midstate, ctx.h, 32);
    endian_flip32(work->midstate, work->midstate);
}

static struct work *make_work(void)
{
    struct work *work = calloc(1, sizeof(struct work));

    if (unlikely(!work))
        quit(1, "Failed to calloc work in make_work");

    cg_wlock(&control_lock);
    work->id = total_work++;
    cg_wunlock(&control_lock);

    return work;
}

/* This is the central place all work that is about to be retired should be
 * cleaned to remove any dynamically allocated arrays within the struct */
void clean_work(struct work *work)
{
    free(work->job_id);
    free(work->ntime);
    free(work->coinbase);
    free(work->nonce1);
    memset(work, 0, sizeof(struct work));
}

/* All dynamically allocated work structs should be freed here to not leak any
 * ram from arrays allocated within the work struct */
void free_work(struct work *work)
{
    clean_work(work);
    free(work);
}

static void gen_hash(unsigned char *data, unsigned char *hash, int len);
static void calc_diff(struct work *work, double known);
char *workpadding = "000000800000000000000000000000000000000000000000000000000000000000000000000000000000000080020000";

#ifdef HAVE_LIBCURL
/* Process transactions with GBT by storing the binary value of the first
 * transaction, and the hashes of the remaining transactions since these
 * remain constant with an altered coinbase when generating work. Must be
 * entered under gbt_lock */
static bool __build_gbt_txns(struct pool *pool, json_t *res_val)
{
    json_t *txn_array;
    bool ret = false;
    size_t cal_len;
    int i;

    free(pool->txn_hashes);
    pool->txn_hashes = NULL;
    pool->gbt_txns = 0;

    txn_array = json_object_get(res_val, "transactions");
    if (!json_is_array(txn_array))
        goto out;

    ret = true;
    pool->gbt_txns = json_array_size(txn_array);
    if (!pool->gbt_txns)
        goto out;

    pool->txn_hashes = calloc(32 * (pool->gbt_txns + 1), 1);
    if (unlikely(!pool->txn_hashes))
        quit(1, "Failed to calloc txn_hashes in __build_gbt_txns");

    for (i = 0; i < pool->gbt_txns; i++) {
        json_t *txn_val = json_object_get(json_array_get(txn_array, i), "data");
        const char *txn = json_string_value(txn_val);
        int txn_len = strlen(txn);
        unsigned char *txn_bin;

        cal_len = txn_len;
        align_len(&cal_len);
        txn_bin = calloc(cal_len, 1);
        if (unlikely(!txn_bin))
            quit(1, "Failed to calloc txn_bin in __build_gbt_txns");
        if (unlikely(!hex2bin(txn_bin, txn, txn_len / 2)))
            quit(1, "Failed to hex2bin txn_bin");

        gen_hash(txn_bin, pool->txn_hashes + (32 * i), txn_len / 2);
        free(txn_bin);
    }
out:
    return ret;
}

static unsigned char *__gbt_merkleroot(struct pool *pool)
{
    unsigned char *merkle_hash;
    int i, txns;

    merkle_hash = calloc(32 * (pool->gbt_txns + 2), 1);
    if (unlikely(!merkle_hash))
        quit(1, "Failed to calloc merkle_hash in __gbt_merkleroot");

    gen_hash(pool->coinbase, merkle_hash, pool->coinbase_len);

    if (pool->gbt_txns)
        memcpy(merkle_hash + 32, pool->txn_hashes, pool->gbt_txns * 32);

    txns = pool->gbt_txns + 1;
    while (txns > 1) {
        if (txns % 2) {
            memcpy(&merkle_hash[txns * 32], &merkle_hash[(txns - 1) * 32], 32);
            txns++;
        }
        for (i = 0; i < txns; i += 2){
            unsigned char hashout[32];

            gen_hash(merkle_hash + (i * 32), hashout, 64);
            memcpy(merkle_hash + (i / 2 * 32), hashout, 32);
        }
        txns /= 2;
    }
    return merkle_hash;
}

static bool work_decode(struct pool *pool, struct work *work, json_t *val);

static void update_gbt(struct pool *pool)
{
    int rolltime;
    json_t *val;
    CURL *curl;

    curl = curl_easy_init();
    if (unlikely(!curl))
        quit (1, "CURL initialisation failed in update_gbt");

    val = json_rpc_call(curl, pool->rpc_url, pool->rpc_userpass,
                pool->rpc_req, true, false, &rolltime, pool, false);

    if (val) {
        struct work *work = make_work();
        bool rc = work_decode(pool, work, val);

        total_getworks++;
        pool->getwork_requested++;
        if (rc) {
            applog(LOG_DEBUG, "Successfully retrieved and updated GBT from %s", pool->poolname);
            cgtime(&pool->tv_idle);
            if (pool == current_pool())
                opt_work_update = true;
        } else {
            applog(LOG_DEBUG, "Successfully retrieved but FAILED to decipher GBT from %s", pool->poolname);
        }
        json_decref(val);
        free_work(work);
    } else {
        applog(LOG_DEBUG, "FAILED to update GBT from %s", pool->poolname);
    }
    curl_easy_cleanup(curl);
}

static void gen_gbt_work(struct pool *pool, struct work *work)
{
    unsigned char *merkleroot;
    struct timeval now;

    cgtime(&now);
    if (now.tv_sec - pool->tv_lastwork.tv_sec > 60)
        update_gbt(pool);

    cg_wlock(&pool->gbt_lock);
    memcpy(pool->coinbase + pool->nonce2_offset, &pool->nonce2, 4);
    pool->nonce2++;
    cg_dwlock(&pool->gbt_lock);
    merkleroot = __gbt_merkleroot(pool);

    memcpy(work->data, &pool->gbt_version, 4);
    memcpy(work->data + 4, pool->previousblockhash, 32);
    memcpy(work->data + 4 + 32 + 32, &pool->curtime, 4);
    memcpy(work->data + 4 + 32 + 32 + 4, &pool->gbt_bits, 4);

    memcpy(work->target, pool->gbt_target, 32);

    work->coinbase = bin2hex(pool->coinbase, pool->coinbase_len);

    /* For encoding the block data on submission */
    work->gbt_txns = pool->gbt_txns + 1;

    if (pool->gbt_workid)
        work->job_id = strdup(pool->gbt_workid);
    cg_runlock(&pool->gbt_lock);

    flip32(work->data + 4 + 32, merkleroot);
    free(merkleroot);
    memset(work->data + 4 + 32 + 32 + 4 + 4, 0, 4); /* nonce */

    hex2bin(work->data + 4 + 32 + 32 + 4 + 4 + 4, workpadding, 48);

    if (opt_debug) {
        char *header = bin2hex(work->data, 128);

        applog(LOG_DEBUG, "Generated GBT header %s", header);
        applog(LOG_DEBUG, "Work coinbase %s", work->coinbase);
        free(header);
    }

    calc_midstate(work);
    local_work++;
    work->pool = pool;
    work->gbt = true;
    work->id = total_work++;
    work->longpoll = false;
    work->getwork_mode = GETWORK_MODE_GBT;
    work->work_block = work_block;
    /* Nominally allow a driver to ntime roll 60 seconds */
    work->drv_rolllimit = 60;
    calc_diff(work, 0);
    cgtime(&work->tv_staged);
}

static bool gbt_decode(struct pool *pool, json_t *res_val)
{
    const char *previousblockhash;
    const char *target;
    const char *coinbasetxn;
    const char *longpollid;
    unsigned char hash_swap[32];
    int expires;
    int version;
    int curtime;
    bool submitold;
    const char *bits;
    const char *workid;
    int cbt_len, orig_len;
    uint8_t *extra_len;
    size_t cal_len;

    previousblockhash = json_string_value(json_object_get(res_val, "previousblockhash"));
    target = json_string_value(json_object_get(res_val, "target"));
    coinbasetxn = json_string_value(json_object_get(json_object_get(res_val, "coinbasetxn"), "data"));
    longpollid = json_string_value(json_object_get(res_val, "longpollid"));
    expires = json_integer_value(json_object_get(res_val, "expires"));
    version = json_integer_value(json_object_get(res_val, "version"));
    curtime = json_integer_value(json_object_get(res_val, "curtime"));
    submitold = json_is_true(json_object_get(res_val, "submitold"));
    bits = json_string_value(json_object_get(res_val, "bits"));
    workid = json_string_value(json_object_get(res_val, "workid"));

    if (!previousblockhash || !target || !coinbasetxn || !longpollid ||
        !expires || !version || !curtime || !bits) {
        applog(LOG_ERR, "JSON failed to decode GBT");
        return false;
    }

    applog(LOG_DEBUG, "previousblockhash: %s", previousblockhash);
    applog(LOG_DEBUG, "target: %s", target);
    applog(LOG_DEBUG, "coinbasetxn: %s", coinbasetxn);
    applog(LOG_DEBUG, "longpollid: %s", longpollid);
    applog(LOG_DEBUG, "expires: %d", expires);
    applog(LOG_DEBUG, "version: %d", version);
    applog(LOG_DEBUG, "curtime: %d", curtime);
    applog(LOG_DEBUG, "submitold: %s", submitold ? "true" : "false");
    applog(LOG_DEBUG, "bits: %s", bits);
    if (workid)
        applog(LOG_DEBUG, "workid: %s", workid);

    cg_wlock(&pool->gbt_lock);
    free(pool->coinbasetxn);
    pool->coinbasetxn = strdup(coinbasetxn);
    cbt_len = strlen(pool->coinbasetxn) / 2;
    pool->coinbase_len = cbt_len + 4;
    /* We add 4 bytes of extra data corresponding to nonce2 of stratum */
    cal_len = pool->coinbase_len + 1;
    align_len(&cal_len);
    free(pool->coinbase);
    pool->coinbase = calloc(cal_len, 1);
    if (unlikely(!pool->coinbase))
        quit(1, "Failed to calloc pool coinbase in gbt_decode");
    hex2bin(pool->coinbase, pool->coinbasetxn, 42);
    extra_len = (uint8_t *)(pool->coinbase + 41);
    orig_len = *extra_len;
    hex2bin(pool->coinbase + 42, pool->coinbasetxn + 84, orig_len);
    *extra_len += 4;
    hex2bin(pool->coinbase + 42 + *extra_len, pool->coinbasetxn + 84 + (orig_len * 2),
        cbt_len - orig_len - 42);
    pool->nonce2_offset = orig_len + 42;

    free(pool->longpollid);
    pool->longpollid = strdup(longpollid);
    free(pool->gbt_workid);
    if (workid)
        pool->gbt_workid = strdup(workid);
    else
        pool->gbt_workid = NULL;

    hex2bin(hash_swap, previousblockhash, 32);
    swap256(pool->previousblockhash, hash_swap);

    hex2bin(hash_swap, target, 32);
    swab256(pool->gbt_target, hash_swap);

    pool->gbt_expires = expires;
    pool->gbt_version = htobe32(version);
    pool->curtime = htobe32(curtime);
    pool->submit_old = submitold;

    hex2bin((unsigned char *)&pool->gbt_bits, bits, 4);

    __build_gbt_txns(pool, res_val);
    cg_wunlock(&pool->gbt_lock);

    return true;
}

static bool getwork_decode(json_t *res_val, struct work *work)
{
    if (unlikely(!jobj_binary(res_val, "data", work->data, sizeof(work->data), true))) {
        applog(LOG_ERR, "JSON inval data");
        return false;
    }
    if (opt_heavy || opt_hefty) {
        unsigned int datacopy[20], datacopyrev[20];
        memcpy(datacopy, work->data, 80);
        flip80(datacopyrev, datacopy);
        memcpy(work->data, datacopyrev, 80);
    }

    if (!jobj_binary(res_val, "midstate", work->midstate, sizeof(work->midstate), false)) {
        // Calculate it ourselves
        applog(LOG_DEBUG, "Calculating midstate locally");
        calc_midstate(work);
    }

    if (unlikely(!jobj_binary(res_val, "target", work->target, sizeof(work->target), true))) {
        applog(LOG_ERR, "JSON inval target");
        return false;
    }
    return true;
}

/* Returns whether the pool supports local work generation or not. */
static bool pool_localgen(struct pool *pool)
{
    return (pool->has_stratum || pool->has_gbt);
}

static bool work_decode(struct pool *pool, struct work *work, json_t *val)
{
    json_t *res_val = json_object_get(val, "result");
    bool ret = false;

    cgtime(&pool->tv_lastwork);
    if (!res_val || json_is_null(res_val)) {
        applog(LOG_ERR, "JSON Failed to decode result");
        goto out;
    }

    if (pool->has_gbt) {
        if (unlikely(!gbt_decode(pool, res_val)))
            goto out;
        work->gbt = true;
        ret = true;
        goto out;
    } else if (unlikely(!getwork_decode(res_val, work)))
        goto out;

    memset(work->hash, 0, sizeof(work->hash));

    cgtime(&work->tv_staged);

    ret = true;

out:
    return ret;
}
#else /* HAVE_LIBCURL */
/* Always true with stratum */
#define pool_localgen(pool) (true)
#define json_rpc_call(curl, url, userpass, rpc_req, probe, longpoll, rolltime, pool, share) (NULL)
#define work_decode(pool, work, val) (false)
#define gen_gbt_work(pool, work) {}
#endif /* HAVE_LIBCURL */

int dev_from_id(int thr_id)
{
    struct cgpu_info *cgpu = get_thr_cgpu(thr_id);

    return cgpu->device_id;
}

/* Create an exponentially decaying average over the opt_log_interval */
void decay_time(double *f, double fadd, double fsecs)
{
    double ftotal, fprop;

    fprop = 1.0 - 1 / (exp(fsecs / (double)opt_log_interval));
    ftotal = 1.0 + fprop;
    *f += (fadd * fprop);
    *f /= ftotal;
}

static int __total_staged(void)
{
    return HASH_COUNT(staged_work);
}

static int total_staged(void)
{
    int ret;

    mutex_lock(stgd_lock);
    ret = __total_staged();
    mutex_unlock(stgd_lock);

    return ret;
}

#ifdef HAVE_CURSES
WINDOW *mainwin, *statuswin, *logwin;
#endif
double total_secs = 1.0;
static char statusline[256];
/* logstart is where the log window should start */
static int devcursor, logstart, logcursor;
#ifdef HAVE_CURSES
/* statusy is where the status window goes up to in cases where it won't fit at startup */
static int statusy;
#endif
#ifdef HAVE_OPENCL
struct cgpu_info gpus[MAX_GPUDEVICES]; /* Maximum number apparently possible */
#endif

#ifdef HAVE_CURSES
static inline void unlock_curses(void)
{
    mutex_unlock(&console_lock);
}

static inline void lock_curses(void)
{
    mutex_lock(&console_lock);
}

static bool curses_active_locked(void)
{
    bool ret;

    lock_curses();
    ret = curses_active;
    if (!ret)
        unlock_curses();
    return ret;
}
#endif

/* Convert a uint64_t value into a truncated string for displaying with its
 * associated suitable for Mega, Giga etc. Buf array needs to be long enough */
static void suffix_string(uint64_t val, char *buf, size_t bufsiz, int sigdigits)
{
    const double  dkilo = 1000.0;
    const uint64_t kilo = 1000ull;
    const uint64_t mega = 1000000ull;
    const uint64_t giga = 1000000000ull;
    const uint64_t tera = 1000000000000ull;
    const uint64_t peta = 1000000000000000ull;
    const uint64_t exa  = 1000000000000000000ull;
    char suffix[2] = "";
    bool decimal = true;
    double dval;

    if (val >= exa) {
        val /= peta;
        dval = (double)val / dkilo;
        strcpy(suffix, "E");
    } else if (val >= peta) {
        val /= tera;
        dval = (double)val / dkilo;
        strcpy(suffix, "P");
    } else if (val >= tera) {
        val /= giga;
        dval = (double)val / dkilo;
        strcpy(suffix, "T");
    } else if (val >= giga) {
        val /= mega;
        dval = (double)val / dkilo;
        strcpy(suffix, "G");
    } else if (val >= mega) {
        val /= kilo;
        dval = (double)val / dkilo;
        strcpy(suffix, "M");
    } else if (val >= kilo) {
        dval = (double)val / dkilo;
        strcpy(suffix, "K");
    } else {
        dval = val;
        decimal = false;
    }

    if (!sigdigits) {
        if (decimal)
            snprintf(buf, bufsiz, "%.3g%s", dval, suffix);
        else
            snprintf(buf, bufsiz, "%d%s", (unsigned int)dval, suffix);
    } else {
        /* Always show sigdigits + 1, padded on right with zeroes
         * followed by suffix */
        int ndigits = sigdigits - 1 - (dval > 0.0 ? floor(log10(dval)) : 0);

        snprintf(buf, bufsiz, "%*.*f%s", sigdigits + 1, ndigits, dval, suffix);
    }
}

static void get_statline(char *buf, size_t bufsiz, struct cgpu_info *cgpu)
{
    char displayed_hashes[16], displayed_rolling[16];
    uint64_t dh64, dr64;
    struct timeval now;
    double dev_runtime, wu;

    if (cgpu->dev_start_tv.tv_sec == 0)
        dev_runtime = total_secs;
    else {
        cgtime(&now);
        dev_runtime = tdiff(&now, &(cgpu->dev_start_tv));
    }

    if (dev_runtime < 1.0)
        dev_runtime = 1.0;

    wu = cgpu->diff1 / dev_runtime * 60.0;

    dh64 = (double)cgpu->total_mhashes / dev_runtime * 1000000ull;
    dr64 = (double)cgpu->rolling * 1000000ull;
    suffix_string(dh64, displayed_hashes, sizeof(displayed_hashes), 4);
    suffix_string(dr64, displayed_rolling, sizeof(displayed_rolling), 4);

    snprintf(buf, bufsiz, "%s%d ", cgpu->drv->name, cgpu->device_id);
    cgpu->drv->get_statline_before(buf, bufsiz, cgpu);
    tailsprintf(buf, bufsiz, "(%ds):%s (avg):%sh/s | A:%.0f R:%.0f HW:%d WU:%.1f/m",
        opt_log_interval,
        displayed_rolling,
        displayed_hashes,
        cgpu->diff_accepted,
        cgpu->diff_rejected,
        cgpu->hw_errors,
        wu);
    cgpu->drv->get_statline(buf, bufsiz, cgpu);
}

static bool shared_strategy(void)
{
    return (pool_strategy == POOL_LOADBALANCE || pool_strategy == POOL_BALANCE);
}

#ifdef HAVE_CURSES
static int menu_attr = A_REVERSE;
static int attr_bad = A_BOLD;
#define CURBUFSIZ 256
#define cg_mvwprintw(win, y, x, fmt, ...) do { \
    char tmp42[CURBUFSIZ]; \
    snprintf(tmp42, sizeof(tmp42), fmt, ##__VA_ARGS__); \
    mvwprintw(win, y, x, "%s", tmp42); \
} while (0)
#define cg_wprintw(win, fmt, ...) do { \
    char tmp42[CURBUFSIZ]; \
    snprintf(tmp42, sizeof(tmp42), fmt, ##__VA_ARGS__); \
    wprintw(win, "%s", tmp42); \
} while (0)

static void adj_width(int var, int *length)
{
    if ((int)(log10(var) + 1) > *length)
        (*length)++;
}

static void adj_fwidth(float var, int *length)
{
    if ((int)(log10(var) + 1) > *length)
        (*length)++;
}

/* Must be called with curses mutex lock held and curses_active */
static void curses_print_uptime(void)
{
    struct timeval now, tv;
    unsigned int days, hours;
    div_t d;

    cgtime(&now);
    timersub(&now, &total_tv_start, &tv);
    d = div(tv.tv_sec, 86400);
    days = d.quot;
    d = div(d.rem, 3600);
    hours = d.quot;
    d = div(d.rem, 60);
    cg_wprintw(statuswin, " - [%u day%c %02d:%02d:%02d]"
        , days
        , (days == 1) ? ' ' : 's'
        , hours
        , d.quot
        , d.rem
    );
}

static void curses_print_poolstats(void)
{
    int i;
    struct pool *pool;
    char poolstats[4][40];
    static int d_width = 1, a_width = 1, r_width = 1, dc_width = 1;

    for (i = 0; i < 4; i++) { 
        if (total_pools > i) {
            pool = pools[i];
            adj_fwidth(pool->last_block_diff, &d_width);
            adj_width(pool->accepted, &a_width);
            adj_width(pool->rejected, &r_width);
            adj_width(pool->disconnect_occasions, &dc_width);
            sprintf(poolstats[i], "%-14s D:%-*.0f A:%-*d R:%-*d DC:%-*d",
                pool->poolname,
                d_width, pool->last_block_diff,
                a_width, pool->accepted,
                r_width, pool->rejected,
                dc_width, pool->disconnect_occasions
            ); 
        } else {
          poolstats[i][0] = '\0';
        }
    }
    cg_mvwprintw(statuswin, 4, 0, " %-37s | %-37s", poolstats[0], poolstats[1]);
    cg_mvwprintw(statuswin, 5, 0, " %-37s | %-37s", poolstats[2], poolstats[3]);
 }

static void curses_print_status(void)
{
    struct pool *pool = current_pool();

    wattron(statuswin, A_BOLD);
    cg_mvwprintw(statuswin, 0, 0, " %s" PACKAGE " version " VERSION " - Started: %s", opt_heavy ? "hvc.1gh.com " : "", datestamp);
    curses_print_uptime();
    wclrtoeol(statuswin);
    wattroff(statuswin, A_BOLD);

    wattron(statuswin, menu_attr);
    cg_mvwprintw(statuswin, 1, 0, " [P]ool management %s[S]ettings [D]isplay options [Q]uit %s",
        have_opencl ? "[G]PU management " : "",
        have_opencl ? "        " : "                         ");
    wattroff(statuswin, menu_attr);

    cg_mvwprintw(statuswin, 2, 0, " %s", statusline);
    wclrtoeol(statuswin);

    cg_mvwprintw(statuswin, 3, 0, " ST: %d  SS: %d  NB: %d  LW: %d  GF: %d  RF: %d",
        total_staged(), total_stale, new_blocks,
        local_work, total_go, total_ro);
    wclrtoeol(statuswin);

    if (shared_strategy() && total_pools > 1) {
        curses_print_poolstats();
    } else {
        if (pool->has_stratum) {
            cg_mvwprintw(statuswin, 4, 0, " Connected to %s diff %s with stratum as user %s",
                pool->sockaddr_url, pool->diff, pool->rpc_user);
        } else {
            cg_mvwprintw(statuswin, 4, 0, " Connected to %s diff %s with%s %s as user %s",
                pool->sockaddr_url, pool->diff, have_longpoll ? "": "out",
                pool->has_gbt ? "GBT" : "LP", pool->rpc_user);
        }
        cg_mvwprintw(statuswin, 5, 0, " %s  Diff: %s  Started: %s  Best share: %s   ",
                block_poolname, block_diff, blocktime, best_share);
        wclrtoeol(statuswin);
    }
    wclrtoeol(statuswin);

    mvwhline(statuswin, 6, 0, '-', 80);
    if (!opt_compact)
        mvwhline(statuswin, statusy - 1, 0, '-', 80);
}

static int dev_width;

static void curses_print_devstatus(struct cgpu_info *cgpu, int count)
{
    static int drfwidth = 1, hwwidth = 1, wuwidth = 1;
    char logline[256];
    char displayed_hashes[16], displayed_rolling[16];
    uint64_t dh64, dr64;
    struct timeval now;
    double dev_runtime, wu;

    if (opt_compact)
        return;

    if (devcursor + count > LINES - 2)
        return;

    if (count >= most_devices)
        return;

    if (cgpu->dev_start_tv.tv_sec == 0)
        dev_runtime = total_secs;
    else {
        cgtime(&now);
        dev_runtime = tdiff(&now, &(cgpu->dev_start_tv));
    }

    if (dev_runtime < 1.0)
        dev_runtime = 1.0;

    cgpu->utility = cgpu->accepted / dev_runtime * 60;
    wu = cgpu->diff1 / dev_runtime * 60;

    wmove(statuswin,devcursor + count, 0);
    cg_wprintw(statuswin, " %s %*d: ", cgpu->drv->name, dev_width, cgpu->device_id);
    logline[0] = '\0';
    cgpu->drv->get_statline_before(logline, sizeof(logline), cgpu);
    cg_wprintw(statuswin, "%s", logline);

    dh64 = (double)cgpu->total_mhashes / dev_runtime * 1000000ull;
    dr64 = (double)cgpu->rolling * 1000000ull;
    suffix_string(dh64, displayed_hashes, sizeof(displayed_hashes), 4);
    suffix_string(dr64, displayed_rolling, sizeof(displayed_rolling), 4);

#ifdef USE_USBUTILS
    if (cgpu->usbinfo.nodev)
        cg_wprintw(statuswin, "ZOMBIE");
    else
#endif
    if (cgpu->status == LIFE_DEAD)
        cg_wprintw(statuswin, "DEAD  ");
    else if (cgpu->status == LIFE_SICK)
        cg_wprintw(statuswin, "SICK  ");
    else if (cgpu->deven == DEV_DISABLED)
        cg_wprintw(statuswin, "OFF   ");
    else if (cgpu->deven == DEV_RECOVER)
        cg_wprintw(statuswin, "REST  ");
    else
        cg_wprintw(statuswin, "%6s", displayed_rolling);

    float reject_pct = 0.0;
    if ((cgpu->diff_accepted + cgpu->diff_rejected) > 0)
        reject_pct = (cgpu->diff_rejected / (cgpu->diff_accepted + cgpu->diff_rejected)) * 100;
    adj_fwidth(reject_pct, &drfwidth);
    adj_width(cgpu->hw_errors, &hwwidth);
    adj_width(wu, &wuwidth);

    cg_wprintw(statuswin, "/%6sh/s | R:%*.1f%% HW:%*d WU:%*.1f/m",
            displayed_hashes,
            drfwidth, reject_pct,
            hwwidth, cgpu->hw_errors,
            wuwidth + 2, wu);
    logline[0] = '\0';
    cgpu->drv->get_statline(logline, sizeof(logline), cgpu);
    cg_wprintw(statuswin, "%s", logline);

    wclrtoeol(statuswin);
}
#endif

#ifdef HAVE_CURSES
/* Check for window resize. Called with curses mutex locked */
static inline void change_logwinsize(void)
{
    int x, y, logx, logy;

    getmaxyx(mainwin, y, x);
    if (x < 80 || y < 25)
        return;

    if (y > statusy + 2 && statusy < logstart) {
        if (y - 2 < logstart)
            statusy = y - 2;
        else
            statusy = logstart;
        logcursor = statusy;
        mvwin(logwin, logcursor, 0);
        wresize(statuswin, statusy, x);
    }

    y -= logcursor;
    getmaxyx(logwin, logy, logx);
    /* Detect screen size change */
    if (x != logx || y != logy)
        wresize(logwin, y, x);
}

static void check_winsizes(void)
{
    if (!use_curses)
        return;
    if (curses_active_locked()) {
        int y, x;

        erase();
        x = getmaxx(statuswin);
        if (logstart > LINES - 2)
            statusy = LINES - 2;
        else
            statusy = logstart;
        logcursor = statusy;
        wresize(statuswin, statusy, x);
        getmaxyx(mainwin, y, x);
        y -= logcursor;
        wresize(logwin, y, x);
        mvwin(logwin, logcursor, 0);
        unlock_curses();
    }
}

static void disable_curses_windows(void);
static void enable_curses_windows(void);

static void switch_logsize(bool __maybe_unused newdevs)
{
    if (curses_active_locked()) {
#ifdef WIN32
        if (newdevs)
            disable_curses_windows();
#endif
        if (opt_compact) {
            logstart = devcursor;
            logcursor = logstart;
        } else {
            logstart = devcursor + most_devices;
            logcursor = logstart;
        }
#ifdef WIN32
        if (newdevs)
            enable_curses_windows();
#endif
        unlock_curses();
        check_winsizes();
    }
}

/* For mandatory printing when mutex is already locked */
void _wlog(const char *str)
{
    wprintw(logwin, "%s", str);
}

/* Mandatory printing */
void _wlogprint(const char *str)
{
    if (curses_active_locked()) {
        wprintw(logwin, "%s", str);
        unlock_curses();
    }
}
#else
static void switch_logsize(bool __maybe_unused newdevs)
{
}
#endif

#ifdef HAVE_CURSES
bool log_curses_only(int prio, const char *datetime, const char *str)
{
    bool high_prio;

    high_prio = (prio == LOG_WARNING || prio == LOG_ERR);

    if (curses_active_locked()) {
        if (!opt_loginput || high_prio) {
            wprintw(logwin, "%s%s\n", datetime, str);
            if (high_prio) {
                touchwin(logwin);
                wrefresh(logwin);
            }
        }
        unlock_curses();
        return true;
    }
    return false;
}

void clear_logwin(void)
{
    if (curses_active_locked()) {
        erase();
        wclear(logwin);
        unlock_curses();
    }
}

void logwin_update(void)
{
    if (curses_active_locked()) {
        touchwin(logwin);
        wrefresh(logwin);
        unlock_curses();
    }
}
#endif

static void enable_pool(struct pool *pool)
{
    if (pool->enabled != POOL_ENABLED) {
        enabled_pools++;
        pool->enabled = POOL_ENABLED;
    }
}

#ifdef HAVE_CURSES
static void disable_pool(struct pool *pool)
{
    if (pool->enabled == POOL_ENABLED)
        enabled_pools--;
    pool->enabled = POOL_DISABLED;
}
#endif

static void reject_pool(struct pool *pool)
{
    if (pool->enabled == POOL_ENABLED)
        enabled_pools--;
    pool->enabled = POOL_REJECTING;
}

static void restart_threads(void);

/* Theoretically threads could race when modifying accepted and
 * rejected values but the chance of two submits completing at the
 * same time is zero so there is no point adding extra locking */
static void
share_result(json_t *val, json_t *res, json_t *err, const struct work *work,
         char *hashshow, bool resubmit, char *worktime)
{
    struct pool *pool = work->pool;
    struct cgpu_info *cgpu;

    cgpu = get_thr_cgpu(work->thr_id);

    if (json_is_true(res) || (work->gbt && json_is_null(res))) {
        mutex_lock(&stats_lock);
        cgpu->accepted++;
        total_accepted++;
        pool->accepted++;
        cgpu->diff_accepted += work->work_difficulty;
        total_diff_accepted += work->work_difficulty;
        pool->diff_accepted += work->work_difficulty;
        mutex_unlock(&stats_lock);

        pool->seq_rejects = 0;
        cgpu->last_share_pool = pool->pool_no;
        cgpu->last_share_pool_time = time(NULL);
        cgpu->last_share_diff = work->work_difficulty;
        pool->last_share_time = cgpu->last_share_pool_time;
        pool->last_share_diff = work->work_difficulty;
        applog(LOG_DEBUG, "PROOF OF WORK RESULT: true (yay!!!)");
        if (!QUIET) {
            if (total_pools > 1) {
                applog(LOG_NOTICE, "Accepted %s %s %d at %s %s%s",
                       hashshow, cgpu->drv->name, cgpu->device_id, pool->poolname, resubmit ? "(resubmit)" : "", worktime);
            } else
                applog(LOG_NOTICE, "Accepted %s %s %d %s%s",
                       hashshow, cgpu->drv->name, cgpu->device_id, resubmit ? "(resubmit)" : "", worktime);
        }
        sharelog("accept", work);
        if (opt_shares && total_accepted >= opt_shares) {
            applog(LOG_WARNING, "Successfully mined %d accepted shares as requested and exiting.", opt_shares);
            kill_work();
            return;
        }

        /* Detect if a pool that has been temporarily disabled for
         * continually rejecting shares has started accepting shares.
         * This will only happen with the work returned from a
         * longpoll */
        if (unlikely(pool->enabled == POOL_REJECTING)) {
            applog(LOG_WARNING, "Rejecting %s now accepting shares, re-enabling!", pool->poolname);
            enable_pool(pool);
            switch_pools(NULL);
        }
        /* If we know we found the block we know better than anyone
         * that new work is needed. */
        if (unlikely(work->block))
            restart_threads();
    } else {
        mutex_lock(&stats_lock);
        cgpu->rejected++;
        total_rejected++;
        pool->rejected++;
        cgpu->diff_rejected += work->work_difficulty;
        total_diff_rejected += work->work_difficulty;
        pool->diff_rejected += work->work_difficulty;
        pool->seq_rejects++;
        mutex_unlock(&stats_lock);

        applog(LOG_DEBUG, "PROOF OF WORK RESULT: false (booooo)");
        if (!QUIET) {
            char where[20];
            char disposition[36] = "reject";
            char reason[32];

            strcpy(reason, "");
            if (total_pools > 1)
                snprintf(where, sizeof(where), "%s", work->pool->poolname);
            else
                strcpy(where, "");

            if (!work->gbt)
                res = json_object_get(val, "reject-reason");
            if (res) {
                const char *reasontmp = json_string_value(res);

                size_t reasonLen = strlen(reasontmp);
                if (reasonLen > 28)
                    reasonLen = 28;
                reason[0] = ' '; reason[1] = '(';
                memcpy(2 + reason, reasontmp, reasonLen);
                reason[reasonLen + 2] = ')'; reason[reasonLen + 3] = '\0';
                memcpy(disposition + 7, reasontmp, reasonLen);
                disposition[6] = ':'; disposition[reasonLen + 7] = '\0';
            } else if (work->stratum && err && json_is_array(err)) {
                json_t *reason_val = json_array_get(err, 1);
                char *reason_str;

                if (reason_val && json_is_string(reason_val)) {
                    reason_str = (char *)json_string_value(reason_val);
                    snprintf(reason, 31, " (%s)", reason_str);
                }
            }

            applog(LOG_NOTICE, "Rejected %s %s %d %s%s %s%s",
                   hashshow, cgpu->drv->name, cgpu->device_id, where, reason, resubmit ? "(resubmit)" : "", worktime);
            sharelog(disposition, work);
        }

        /* Once we have more than a nominal amount of sequential rejects,
         * at least 10 and more than 3 mins at the current utility,
         * disable the pool because some pool error is likely to have
         * ensued. Do not do this if we know the share just happened to
         * be stale due to networking delays.
         */
        if (pool->seq_rejects > 10 && !work->stale && opt_disable_pool && enabled_pools > 1) {
            double utility = total_accepted / total_secs * 60;

            if (pool->seq_rejects > utility * 3) {
                applog(LOG_WARNING, "%s rejected %d sequential shares, disabling!",
                       pool->poolname, pool->seq_rejects);
                reject_pool(pool);
                if (pool == current_pool())
                    switch_pools(NULL);
                pool->seq_rejects = 0;
            }
        }
    }
}

#ifdef HAVE_LIBCURL
static void text_print_status(int thr_id)
{
    struct cgpu_info *cgpu;
    char logline[256];

    cgpu = get_thr_cgpu(thr_id);
    if (cgpu) {
        get_statline(logline, sizeof(logline), cgpu);
        printf("%s\n", logline);
    }
}

static void print_status(int thr_id)
{
    if (!curses_active)
        text_print_status(thr_id);
}

static void show_hash(struct work *work, char *hashshow)
{
    unsigned char rhash[32];
    char diffdisp[16];
    unsigned long h32;
    uint32_t *hash32;
    int intdiff, ofs;

    swab256(rhash, work->hash);
    for (ofs = 0; ofs <= 28; ofs ++) {
        if (rhash[ofs])
            break;
    }
    hash32 = (uint32_t *)(rhash + ofs);
    h32 = be32toh(*hash32);
    intdiff = round(work->work_difficulty);
    suffix_string(work->share_diff, diffdisp, sizeof (diffdisp), 0);
    snprintf(hashshow, 64, "%08lx Diff %s/%d%s", h32, diffdisp, intdiff,
         work->block? " BLOCK!" : "");
}

static bool submit_upstream_work(struct work *work, CURL *curl, bool resubmit)
{
    char *hexstr = NULL;
    json_t *val, *res, *err;
    char *s;
    bool rc = false;
    int thr_id = work->thr_id;
    struct cgpu_info *cgpu;
    struct pool *pool = work->pool;
    int rolltime;
    struct timeval tv_submit, tv_submit_reply;
    char hashshow[64 + 4] = "";
    char worktime[200] = "";
    struct timeval now;
    double dev_runtime;

    cgpu = get_thr_cgpu(thr_id);

    endian_flip128(work->data, work->data);

    /* build hex string */
    hexstr = bin2hex(work->data, sizeof(work->data));

    /* build JSON-RPC request */
    if (work->gbt) {
        char *gbt_block, *varint;
        unsigned char data[80];

        flip80(data, work->data);
        gbt_block = bin2hex(data, 80);

        if (work->gbt_txns < 0xfd) {
            uint8_t val = work->gbt_txns;

            varint = bin2hex((const unsigned char *)&val, 1);
        } else if (work->gbt_txns <= 0xffff) {
            uint16_t val = htole16(work->gbt_txns);

            gbt_block = realloc_strcat(gbt_block, "fd");
            varint = bin2hex((const unsigned char *)&val, 2);
        } else {
            uint32_t val = htole32(work->gbt_txns);

            gbt_block = realloc_strcat(gbt_block, "fe");
            varint = bin2hex((const unsigned char *)&val, 4);
        }
        gbt_block = realloc_strcat(gbt_block, varint);
        free(varint);
        gbt_block = realloc_strcat(gbt_block, work->coinbase);

        s = strdup("{\"id\": 0, \"method\": \"submitblock\", \"params\": [\"");
        s = realloc_strcat(s, gbt_block);
        if (work->job_id) {
            s = realloc_strcat(s, "\", {\"workid\": \"");
            s = realloc_strcat(s, work->job_id);
            s = realloc_strcat(s, "\"}]}");
        } else
            s = realloc_strcat(s, "\", {}]}");
        free(gbt_block);
    } else {
        s = strdup("{\"method\": \"getwork\", \"params\": [ \"");
        s = realloc_strcat(s, hexstr);
        s = realloc_strcat(s, "\" ], \"id\":1}");
    }
    applog(LOG_DEBUG, "DBG: sending %s submit RPC call: %s", pool->rpc_url, s);
    s = realloc_strcat(s, "\n");

    cgtime(&tv_submit);
    /* issue JSON-RPC request */
    val = json_rpc_call(curl, pool->rpc_url, pool->rpc_userpass, s, false, false, &rolltime, pool, true);
    cgtime(&tv_submit_reply);
    free(s);

    if (unlikely(!val)) {
        applog(LOG_INFO, "submit_upstream_work json_rpc_call failed");
        if (!pool_tset(pool, &pool->submit_fail)) {
            total_ro++;
            pool->remotefail_occasions++;
            if (opt_lowmem) {
                applog(LOG_WARNING, "%s communication failure, discarding shares", pool->poolname);
                goto out;
            }
            applog(LOG_WARNING, "%s communication failure, caching submissions", pool->poolname);
        }
        cgsleep_ms(5000);
        goto out;
    } else if (pool_tclear(pool, &pool->submit_fail))
        applog(LOG_WARNING, "%s communication resumed, submitting work", pool->poolname);

    res = json_object_get(val, "result");
    err = json_object_get(val, "error");

    if (!QUIET) {
        show_hash(work, hashshow);

        if (opt_worktime) {
            char workclone[20];
            struct tm *tm, tm_getwork, tm_submit_reply;
            double getwork_time = tdiff((struct timeval *)&(work->tv_getwork_reply),
                            (struct timeval *)&(work->tv_getwork));
            double getwork_to_work = tdiff((struct timeval *)&(work->tv_work_start),
                            (struct timeval *)&(work->tv_getwork_reply));
            double work_time = tdiff((struct timeval *)&(work->tv_work_found),
                            (struct timeval *)&(work->tv_work_start));
            double work_to_submit = tdiff(&tv_submit,
                            (struct timeval *)&(work->tv_work_found));
            double submit_time = tdiff(&tv_submit_reply, &tv_submit);
            int diffplaces = 3;

            time_t tmp_time = work->tv_getwork.tv_sec;
            tm = localtime(&tmp_time);
            memcpy(&tm_getwork, tm, sizeof(struct tm));
            tmp_time = tv_submit_reply.tv_sec;
            tm = localtime(&tmp_time);
            memcpy(&tm_submit_reply, tm, sizeof(struct tm));

            if (work->clone) {
                snprintf(workclone, sizeof(workclone), "C:%1.3f",
                        tdiff((struct timeval *)&(work->tv_cloned),
                        (struct timeval *)&(work->tv_getwork_reply)));
            }
            else
                strcpy(workclone, "O");

            if (work->work_difficulty < 1)
                diffplaces = 6;

            snprintf(worktime, sizeof(worktime),
                " <-%08lx.%08lx M:%c D:%1.*f G:%02d:%02d:%02d:%1.3f %s (%1.3f) W:%1.3f (%1.3f) S:%1.3f R:%02d:%02d:%02d",
                (unsigned long)be32toh(*(uint32_t *)&(work->data[opt_scrypt ? 32 : 28])),
                (unsigned long)be32toh(*(uint32_t *)&(work->data[opt_scrypt ? 28 : 24])),
                work->getwork_mode, diffplaces, work->work_difficulty,
                tm_getwork.tm_hour, tm_getwork.tm_min,
                tm_getwork.tm_sec, getwork_time, workclone,
                getwork_to_work, work_time, work_to_submit, submit_time,
                tm_submit_reply.tm_hour, tm_submit_reply.tm_min,
                tm_submit_reply.tm_sec);
        }
    }

    share_result(val, res, err, work, hashshow, resubmit, worktime);

    if (cgpu->dev_start_tv.tv_sec == 0)
        dev_runtime = total_secs;
    else {
        cgtime(&now);
        dev_runtime = tdiff(&now, &(cgpu->dev_start_tv));
    }

    if (dev_runtime < 1.0)
        dev_runtime = 1.0;

    cgpu->utility = cgpu->accepted / dev_runtime * 60;

    if (!opt_realquiet)
        print_status(thr_id);
    if (!want_per_device_stats) {
        char logline[256];

        get_statline(logline, sizeof(logline), cgpu);
        applog(LOG_INFO, "%s", logline);
    }

    json_decref(val);

    rc = true;
out:
    free(hexstr);
    return rc;
}

static bool get_upstream_work(struct work *work, CURL *curl)
{
    struct pool *pool = work->pool;
    struct cgminer_pool_stats *pool_stats = &(pool->cgminer_pool_stats);
    struct timeval tv_elapsed;
    json_t *val = NULL;
    bool rc = false;
    char *url;

    applog(LOG_DEBUG, "DBG: sending %s get RPC call: %s", pool->rpc_url, pool->rpc_req);

    url = pool->rpc_url;

    cgtime(&work->tv_getwork);

    val = json_rpc_call(curl, url, pool->rpc_userpass, pool->rpc_req, false,
                false, &work->rolltime, pool, false);
    pool_stats->getwork_attempts++;

    if (likely(val)) {
        rc = work_decode(pool, work, val);
        if (unlikely(!rc))
            applog(LOG_DEBUG, "Failed to decode work in get_upstream_work");
    } else
        applog(LOG_DEBUG, "Failed json_rpc_call in get_upstream_work");

    cgtime(&work->tv_getwork_reply);
    timersub(&(work->tv_getwork_reply), &(work->tv_getwork), &tv_elapsed);
    pool_stats->getwork_wait_rolling += ((double)tv_elapsed.tv_sec + ((double)tv_elapsed.tv_usec / 1000000)) * 0.63;
    pool_stats->getwork_wait_rolling /= 1.63;

    timeradd(&tv_elapsed, &(pool_stats->getwork_wait), &(pool_stats->getwork_wait));
    if (timercmp(&tv_elapsed, &(pool_stats->getwork_wait_max), >)) {
        pool_stats->getwork_wait_max.tv_sec = tv_elapsed.tv_sec;
        pool_stats->getwork_wait_max.tv_usec = tv_elapsed.tv_usec;
    }
    if (timercmp(&tv_elapsed, &(pool_stats->getwork_wait_min), <)) {
        pool_stats->getwork_wait_min.tv_sec = tv_elapsed.tv_sec;
        pool_stats->getwork_wait_min.tv_usec = tv_elapsed.tv_usec;
    }
    pool_stats->getwork_calls++;

    work->pool = pool;
    work->longpoll = false;
    work->getwork_mode = GETWORK_MODE_POOL;
    calc_diff(work, 0);
    total_getworks++;
    pool->getwork_requested++;

    if (likely(val))
        json_decref(val);

    return rc;
}
#endif /* HAVE_LIBCURL */

/* Specifies whether we can use this pool for work or not. */
static bool pool_unworkable(struct pool *pool)
{
    if (pool->idle)
        return true;
    if (pool->enabled != POOL_ENABLED)
        return true;
    if (pool->has_stratum && !pool->stratum_active)
        return true;
    return false;
}

/* In balanced mode, the amount of diff1 solutions per pool is monitored as a
 * rolling average per 10 minutes and if pools start getting more, it biases
 * away from them to distribute work evenly. The share count is reset to the
 * rolling average every 10 minutes to not send all work to one pool after it
 * has been disabled/out for an extended period. */
static struct pool *select_balanced(struct pool *cp)
{
    int i, lowest = cp->shares;
    struct pool *ret = cp;

    for (i = 0; i < total_pools; i++) {
        struct pool *pool = pools[i];

        if (pool_unworkable(pool))
            continue;
        if (pool->shares < lowest) {
            lowest = pool->shares;
            ret = pool;
        }
    }

    ret->shares++;
    return ret;
}

static struct pool *priority_pool(int choice);
static bool pool_unusable(struct pool *pool);

/* Select any active pool in a rotating fashion when loadbalance is chosen if
 * it has any quota left. */
static inline struct pool *select_pool(bool lagging)
{
    static int rotating_pool = 0;
    struct pool *pool, *cp;
    bool avail = false;
    int tested, i;

    cp = current_pool();

    if (pool_strategy == POOL_BALANCE) {
        pool = select_balanced(cp);
        goto out;
    }

    if (pool_strategy != POOL_LOADBALANCE && (!lagging || opt_fail_only)) {
        pool = cp;
        goto out;
    } else
        pool = NULL;

    for (i = 0; i < total_pools; i++) {
        struct pool *tp = pools[i];

        if (tp->quota_used < tp->quota_gcd) {
            avail = true;
            break;
        }
    }

    /* There are no pools with quota, so reset them. */
    if (!avail) {
        for (i = 0; i < total_pools; i++)
            pools[i]->quota_used = 0;
        if (++rotating_pool >= total_pools)
            rotating_pool = 0;
    }

    /* Try to find the first pool in the rotation that is usable */
    tested = 0;
    while (!pool && tested++ < total_pools) {
        pool = pools[rotating_pool];
        if (pool->quota_used++ < pool->quota_gcd) {
            if (!pool_unworkable(pool))
                break;
            /* Failover-only flag for load-balance means distribute
             * unused quota to priority pool 0. */
            if (opt_fail_only)
                priority_pool(0)->quota_used--;
        }
        pool = NULL;
        if (++rotating_pool >= total_pools)
            rotating_pool = 0;
    }

    /* If there are no alive pools with quota, choose according to
     * priority. */
    if (!pool) {
        for (i = 0; i < total_pools; i++) {
            struct pool *tp = priority_pool(i);

            if (!pool_unusable(tp)) {
                pool = tp;
                break;
            }
        }
    }

    /* If still nothing is usable, use the current pool */
    if (!pool)
        pool = cp;
out:
    applog(LOG_DEBUG, "Selecting %s for work", pool->poolname);
    return pool;
}

/* truediffone == 0x00000000FFFF0000000000000000000000000000000000000000000000000000
 * Generate a 256 bit binary LE target by cutting up diff into 64 bit sized
 * portions or vice versa. */
static const double truediffone = 26959535291011309493156476344723991336010898738574164086137773096960.0;
static const double bits192 = 6277101735386680763835789423207666416102355444464034512896.0;
static const double bits128 = 340282366920938463463374607431768211456.0;
static const double bits64 = 18446744073709551616.0;

/* Converts a little endian 256 bit value to a double */
static double le256todouble(const void *target)
{
    uint64_t *data64;
    double dcut64;

    data64 = (uint64_t *)(target + 24);
    dcut64 = le64toh(*data64) * bits192;

    data64 = (uint64_t *)(target + 16);
    dcut64 += le64toh(*data64) * bits128;

    data64 = (uint64_t *)(target + 8);
    dcut64 += le64toh(*data64) * bits64;

    data64 = (uint64_t *)(target);
    dcut64 += le64toh(*data64);

    return dcut64;
}

/*
 * Calculate the work->work_difficulty based on the work->target
 */
static void calc_diff(struct work *work, double known)
{
    struct cgminer_pool_stats *pool_stats = &(work->pool->cgminer_pool_stats);
    double difficulty;
    int intdiff;

    if (known)
        work->work_difficulty = known;
    else {
        double d64, dcut64;

        d64 = truediffone;
        if (opt_scrypt)
            d64 *= (double)65536;
        else if (opt_keccak)
            d64 *= (double)256;
        dcut64 = le256todouble(work->target);
        if (unlikely(!dcut64))
            dcut64 = 1;
        work->work_difficulty = d64 / dcut64;
    }
    difficulty = work->work_difficulty;

    pool_stats->last_diff = difficulty;
    intdiff = round(difficulty);
    suffix_string(intdiff, work->pool->diff, sizeof(work->pool->diff), 0);

    if (difficulty == pool_stats->min_diff)
        pool_stats->min_diff_count++;
    else if (difficulty < pool_stats->min_diff || pool_stats->min_diff == 0) {
        pool_stats->min_diff = difficulty;
        pool_stats->min_diff_count = 1;
    }

    if (difficulty == pool_stats->max_diff)
        pool_stats->max_diff_count++;
    else if (difficulty > pool_stats->max_diff) {
        pool_stats->max_diff = difficulty;
        pool_stats->max_diff_count = 1;
    }
}

static void get_benchmark_work(struct work *work)
{
    // Use a random work block pulled from a pool
    static uint8_t bench_block[] = { CGMINER_BENCHMARK_BLOCK };

    size_t bench_size = sizeof(*work);
    size_t work_size = sizeof(bench_block);
    size_t min_size = (work_size < bench_size ? work_size : bench_size);
    memset(work, 0, sizeof(*work));
    memcpy(work, &bench_block, min_size);
    work->mandatory = true;
    work->pool = pools[0];
    cgtime(&work->tv_getwork);
    copy_time(&work->tv_getwork_reply, &work->tv_getwork);
    work->getwork_mode = GETWORK_MODE_BENCHMARK;
    calc_diff(work, 0);
}

#ifdef HAVE_CURSES
static void disable_curses_windows(void)
{
    leaveok(logwin, false);
    leaveok(statuswin, false);
    leaveok(mainwin, false);
    nocbreak();
    echo();
    delwin(logwin);
    delwin(statuswin);
}

/* Force locking of curses console_lock on shutdown since a dead thread might
 * have grabbed the lock. */
static bool curses_active_forcelocked(void)
{
    bool ret;

    mutex_trylock(&console_lock);
    ret = curses_active;
    if (!ret)
        unlock_curses();
    return ret;
}

static void disable_curses(void)
{
    if (curses_active_forcelocked()) {
        use_curses = false;
        curses_active = false;
        disable_curses_windows();
        delwin(mainwin);
        endwin();
#ifdef WIN32
        // Move the cursor to after curses output.
        HANDLE hout = GetStdHandle(STD_OUTPUT_HANDLE);
        CONSOLE_SCREEN_BUFFER_INFO csbi;
        COORD coord;

        if (GetConsoleScreenBufferInfo(hout, &csbi)) {
            coord.X = 0;
            coord.Y = csbi.dwSize.Y - 1;
            SetConsoleCursorPosition(hout, coord);
        }
#endif
        unlock_curses();
    }
}
#endif

static void kill_timeout(struct thr_info *thr)
{
    cg_completion_timeout(&thr_info_cancel, thr, 1000);
}

static void kill_mining(void)
{
    struct thr_info *thr;
    int i;

    forcelog(LOG_DEBUG, "Killing off mining threads");
    /* Kill the mining threads*/
    for (i = 0; i < mining_threads; i++) {
        pthread_t *pth = NULL;

        thr = get_thread(i);
        if (thr && PTH(thr) != 0L)
            pth = &thr->pth;
        thr_info_cancel(thr);
#ifndef WIN32
        if (pth && *pth)
            pthread_join(*pth, NULL);
#else
        if (pth && pth->p)
            pthread_join(*pth, NULL);
#endif
    }
}

static void __kill_work(void)
{
    struct thr_info *thr;
    int i;

    if (!successful_connect)
        return;

    forcelog(LOG_INFO, "Received kill message");

#ifdef USE_USBUTILS
    /* Best to get rid of it first so it doesn't
     * try to create any new devices */
    if (!opt_scrypt) {
        forcelog(LOG_DEBUG, "Killing off HotPlug thread");
        thr = &control_thr[hotplug_thr_id];
        kill_timeout(thr);
    }
#endif

    forcelog(LOG_DEBUG, "Killing off watchpool thread");
    /* Kill the watchpool thread */
    thr = &control_thr[watchpool_thr_id];
    kill_timeout(thr);

    forcelog(LOG_DEBUG, "Killing off watchdog thread");
    /* Kill the watchdog thread */
    thr = &control_thr[watchdog_thr_id];
    kill_timeout(thr);

    forcelog(LOG_DEBUG, "Shutting down mining threads");
    for (i = 0; i < mining_threads; i++) {
        struct cgpu_info *cgpu;

        thr = get_thread(i);
        if (!thr)
            continue;
        cgpu = thr->cgpu;
        if (!cgpu)
            continue;

        cgpu->shutdown = true;
    }

    sleep(1);

    cg_completion_timeout(&kill_mining, NULL, 3000);

    forcelog(LOG_DEBUG, "Killing off stage thread");
    /* Stop the others */
    thr = &control_thr[stage_thr_id];
    kill_timeout(thr);

    forcelog(LOG_DEBUG, "Killing off API thread");
    thr = &control_thr[api_thr_id];
    kill_timeout(thr);

#ifdef USE_USBUTILS
    /* Release USB resources in case it's a restart
     * and not a QUIT */
    if (!opt_scrypt) {
        forcelog(LOG_DEBUG, "Releasing all USB devices");
        cg_completion_timeout(&usb_cleanup, NULL, 1000);

        forcelog(LOG_DEBUG, "Killing off usbres thread");
        thr = &control_thr[usbres_thr_id];
        kill_timeout(thr);
    }
#endif

}

/* This should be the common exit path */
void kill_work(void)
{
    __kill_work();

    quit(0, "Shutdown signal received.");
}

static
#ifdef WIN32
const
#endif
char **initial_args;

static void clean_up(bool restarting);

void app_restart(void)
{
    applog(LOG_WARNING, "Attempting to restart %s", packagename);

    __kill_work();
    clean_up(true);

#if defined(unix) || defined(__APPLE__)
    if (forkpid > 0) {
        kill(forkpid, SIGTERM);
        forkpid = 0;
    }
#endif

    execv(initial_args[0], (EXECV_2ND_ARG_TYPE)initial_args);
    applog(LOG_WARNING, "Failed to restart application");
}

static void sighandler(int __maybe_unused sig)
{
    /* Restore signal handlers so we can still quit if kill_work fails */
    sigaction(SIGTERM, &termhandler, NULL);
    sigaction(SIGINT, &inthandler, NULL);
    kill_work();
}

#ifdef HAVE_LIBCURL
/* Called with pool_lock held. Recruit an extra curl if none are available for
 * this pool. */
static void recruit_curl(struct pool *pool)
{
    struct curl_ent *ce = calloc(sizeof(struct curl_ent), 1);

    if (unlikely(!ce))
        quit(1, "Failed to calloc in recruit_curl");

    ce->curl = curl_easy_init();
    if (unlikely(!ce->curl))
        quit(1, "Failed to init in recruit_curl");

    list_add(&ce->node, &pool->curlring);
    pool->curls++;
}

/* Grab an available curl if there is one. If not, then recruit extra curls
 * unless we are in a submit_fail situation, or we have opt_delaynet enabled
 * and there are already 5 curls in circulation. Limit total number to the
 * number of mining threads per pool as well to prevent blasting a pool during
 * network delays/outages. */
static struct curl_ent *pop_curl_entry(struct pool *pool)
{
    int curl_limit = opt_delaynet ? 5 : (mining_threads + opt_queue) * 2;
    bool recruited = false;
    struct curl_ent *ce;

    mutex_lock(&pool->pool_lock);
retry:
    if (!pool->curls) {
        recruit_curl(pool);
        recruited = true;
    } else if (list_empty(&pool->curlring)) {
        if (pool->curls >= curl_limit) {
            pthread_cond_wait(&pool->cr_cond, &pool->pool_lock);
            goto retry;
        } else {
            recruit_curl(pool);
            recruited = true;
        }
    }
    ce = list_entry(pool->curlring.next, struct curl_ent, node);
    list_del(&ce->node);
    mutex_unlock(&pool->pool_lock);

    if (recruited)
        applog(LOG_DEBUG, "Recruited curl for %s", pool->poolname);
    return ce;
}

static void push_curl_entry(struct curl_ent *ce, struct pool *pool)
{
    mutex_lock(&pool->pool_lock);
    list_add_tail(&ce->node, &pool->curlring);
    cgtime(&ce->tv);
    pthread_cond_broadcast(&pool->cr_cond);
    mutex_unlock(&pool->pool_lock);
}

static bool stale_work(struct work *work, bool share);

static inline bool should_roll(struct work *work)
{
    struct timeval now;
    time_t expiry;

    if (work->pool != current_pool() && pool_strategy != POOL_LOADBALANCE && pool_strategy != POOL_BALANCE)
        return false;

    if (work->rolltime > opt_scantime)
        expiry = work->rolltime;
    else
        expiry = opt_scantime;
    expiry = expiry * 2 / 3;

    /* We shouldn't roll if we're unlikely to get one shares' duration
     * work out of doing so */
    cgtime(&now);
    if (now.tv_sec - work->tv_staged.tv_sec > expiry)
        return false;

    return true;
}

/* Limit rolls to 7000 to not beyond 2 hours in the future where bitcoind will
 * reject blocks as invalid. */
static inline bool can_roll(struct work *work)
{
    return (!work->stratum && work->pool && work->rolltime && !work->clone &&
        work->rolls < 7000 && !stale_work(work, false));
}

static void roll_work(struct work *work)
{
    uint32_t *work_ntime;
    uint32_t ntime;

    work_ntime = (uint32_t *)(work->data + 68);
    ntime = be32toh(*work_ntime);
    ntime++;
    *work_ntime = htobe32(ntime);
    local_work++;
    work->rolls++;
    work->blk.nonce = 0;
    applog(LOG_DEBUG, "Successfully rolled work");

    /* This is now a different work item so it needs a different ID for the
     * hashtable */
    work->id = total_work++;
}

static void *submit_work_thread(void *userdata)
{
    struct work *work = (struct work *)userdata;
    struct pool *pool = work->pool;
    bool resubmit = false;
    struct curl_ent *ce;

    pthread_detach(pthread_self());

    RenameThread("submit_work");

    applog(LOG_DEBUG, "Creating extra submit work thread");

    ce = pop_curl_entry(pool);
    /* submit solution to bitcoin via JSON-RPC */
    while (!submit_upstream_work(work, ce->curl, resubmit)) {
        if (opt_lowmem) {
            applog(LOG_NOTICE, "%s share being discarded to minimise memory cache", pool->poolname);
            break;
        }
        resubmit = true;
        if (stale_work(work, true)) {
            applog(LOG_NOTICE, "%s share became stale while retrying submit, discarding", pool->poolname);

            mutex_lock(&stats_lock);
            total_stale++;
            pool->stale_shares++;
            total_diff_stale += work->work_difficulty;
            pool->diff_stale += work->work_difficulty;
            mutex_unlock(&stats_lock);

            free_work(work);
            break;
        }

        /* pause, then restart work-request loop */
        applog(LOG_INFO, "json_rpc_call failed on submit_work, retrying");
    }
    push_curl_entry(ce, pool);

    return NULL;
}

static struct work *make_clone(struct work *work)
{
    struct work *work_clone = copy_work(work);

    work_clone->clone = true;
    cgtime((struct timeval *)&(work_clone->tv_cloned));
    work_clone->longpoll = false;
    work_clone->mandatory = false;
    /* Make cloned work appear slightly older to bias towards keeping the
     * master work item which can be further rolled */
    work_clone->tv_staged.tv_sec -= 1;

    return work_clone;
}

static void stage_work(struct work *work);

static bool clone_available(void)
{
    struct work *work_clone = NULL, *work, *tmp;
    bool cloned = false;

    mutex_lock(stgd_lock);
    if (!staged_rollable)
        goto out_unlock;

    HASH_ITER(hh, staged_work, work, tmp) {
        if (can_roll(work) && should_roll(work)) {
            roll_work(work);
            work_clone = make_clone(work);
            roll_work(work);
            cloned = true;
            break;
        }
    }

out_unlock:
    mutex_unlock(stgd_lock);

    if (cloned) {
        applog(LOG_DEBUG, "Pushing cloned available work to stage thread");
        stage_work(work_clone);
    }
    return cloned;
}

/* Clones work by rolling it if possible, and returning a clone instead of the
 * original work item which gets staged again to possibly be rolled again in
 * the future */
static struct work *clone_work(struct work *work)
{
    int mrs = mining_threads + opt_queue - total_staged();
    struct work *work_clone;
    bool cloned;

    if (mrs < 1)
        return work;

    cloned = false;
    work_clone = make_clone(work);
    while (mrs-- > 0 && can_roll(work) && should_roll(work)) {
        applog(LOG_DEBUG, "Pushing rolled converted work to stage thread");
        stage_work(work_clone);
        roll_work(work);
        work_clone = make_clone(work);
        /* Roll it again to prevent duplicates should this be used
         * directly later on */
        roll_work(work);
        cloned = true;
    }

    if (cloned) {
        stage_work(work);
        return work_clone;
    }

    free_work(work_clone);

    return work;
}

#else /* HAVE_LIBCURL */
static void *submit_work_thread(void __maybe_unused *userdata)
{
    pthread_detach(pthread_self());
    return NULL;
}
#endif /* HAVE_LIBCURL */

/* Return an adjusted ntime if we're submitting work that a device has
 * internally offset the ntime. */
static char *offset_ntime(const char *ntime, int noffset)
{
    unsigned char bin[4];
    uint32_t h32, *be32 = (uint32_t *)bin;

    hex2bin(bin, ntime, 4);
    h32 = be32toh(*be32) + noffset;
    *be32 = htobe32(h32);

    return bin2hex(bin, 4);
}

/* Duplicates any dynamically allocated arrays within the work struct to
 * prevent a copied work struct from freeing ram belonging to another struct */
static void _copy_work(struct work *work, const struct work *base_work, int noffset)
{
    int id = work->id;

    clean_work(work);
    memcpy(work, base_work, sizeof(struct work));
    /* Keep the unique new id assigned during make_work to prevent copied
     * work from having the same id. */
    work->id = id;
    if (base_work->job_id)
        work->job_id = strdup(base_work->job_id);
    if (base_work->nonce1)
        work->nonce1 = strdup(base_work->nonce1);
    if (base_work->ntime) {
        /* If we are passed an noffset the binary work->data ntime and
         * the work->ntime hex string need to be adjusted. */
        if (noffset) {
            uint32_t *work_ntime = (uint32_t *)(work->data + 68);
            uint32_t ntime = be32toh(*work_ntime);

            ntime += noffset;
            *work_ntime = htobe32(ntime);
            work->ntime = offset_ntime(base_work->ntime, noffset);
        } else
            work->ntime = strdup(base_work->ntime);
    } else if (noffset) {
        uint32_t *work_ntime = (uint32_t *)(work->data + 68);
        uint32_t ntime = be32toh(*work_ntime);

        ntime += noffset;
        *work_ntime = htobe32(ntime);
    }
    if (base_work->coinbase)
        work->coinbase = strdup(base_work->coinbase);
}

/* Generates a copy of an existing work struct, creating fresh heap allocations
 * for all dynamically allocated arrays within the struct. noffset is used for
 * when a driver has internally rolled the ntime, noffset is a relative value.
 * The macro copy_work() calls this function with an noffset of 0. */
struct work *copy_work_noffset(struct work *base_work, int noffset)
{
    struct work *work = make_work();

    _copy_work(work, base_work, noffset);

    return work;
}

static void pool_died(struct pool *pool)
{
    if (!pool_tset(pool, &pool->idle)) {
        cgtime(&pool->tv_idle);
        if (pool == current_pool()) {
            applog(LOG_WARNING, "%s not responding!", pool->poolname);
            switch_pools(NULL);
        } else
            applog(LOG_INFO, "%s failed to return work", pool->poolname);
    }
}

static bool stale_work(struct work *work, bool share)
{
    struct timeval now;
    time_t work_expiry;
    struct pool *pool;
    int getwork_delay;

    if (opt_benchmark)
        return false;

    if (work->work_block != work_block) {
        applog(LOG_DEBUG, "Work stale due to block mismatch");
        return true;
    }

    /* Technically the rolltime should be correct but some pools
     * advertise a broken expire= that is lower than a meaningful
     * scantime */
    if (work->rolltime > opt_scantime)
        work_expiry = work->rolltime;
    else
        work_expiry = opt_expiry;

    pool = work->pool;

    if (!share && pool->has_stratum) {
        bool same_job;

        if (!pool->stratum_active || !pool->stratum_notify) {
            applog(LOG_DEBUG, "Work stale due to stratum inactive");
            return true;
        }

        same_job = true;

        cg_rlock(&pool->data_lock);
        if (strcmp(work->job_id, pool->swork.job_id))
            same_job = false;
        cg_runlock(&pool->data_lock);

        if (!same_job) {
            applog(LOG_DEBUG, "Work stale due to stratum job_id mismatch");
            return true;
        }
    }

    /* Factor in the average getwork delay of this pool, rounding it up to
     * the nearest second */
    getwork_delay = pool->cgminer_pool_stats.getwork_wait_rolling * 5 + 1;
    work_expiry -= getwork_delay;
    if (unlikely(work_expiry < 5))
        work_expiry = 5;

    cgtime(&now);
    if ((now.tv_sec - work->tv_staged.tv_sec) >= work_expiry) {
        applog(LOG_DEBUG, "Work stale due to expiry");
        return true;
    }

    if (opt_fail_only && !share && pool != current_pool() && !work->mandatory &&
        pool_strategy != POOL_LOADBALANCE && pool_strategy != POOL_BALANCE) {
        applog(LOG_DEBUG, "Work stale due to fail only pool mismatch");
        return true;
    }

    return false;
}

static uint64_t share_diff(const struct work *work)
{
    bool new_best = false;
    double d64, s64;
    uint64_t ret;

    d64 = truediffone;
    if (opt_scrypt)
        d64 *= (double)65536;
    s64 = le256todouble(work->hash);
    if (unlikely(!s64))
        s64 = 0;

    ret = round(d64 / s64);

    cg_wlock(&control_lock);
    if (unlikely(ret > best_diff)) {
        new_best = true;
        best_diff = ret;
        suffix_string(best_diff, best_share, sizeof(best_share), 0);
    }
    if (unlikely(ret > work->pool->best_diff))
        work->pool->best_diff = ret;
    cg_wunlock(&control_lock);

    if (unlikely(new_best))
        applog(LOG_INFO, "New best share: %s", best_share);

    return ret;
}

static void regen_hash(struct work *work)
{
    uint32_t *data32 = (uint32_t *)(work->data);
    unsigned char swap[80];
    uint32_t *swap32 = (uint32_t *)swap;
    unsigned char hash1[32];

    flip80(swap32, data32);
    sha256(swap, 80, hash1);
    sha256(hash1, 32, (unsigned char *)(work->hash));
}

static void rebuild_hash(struct work *work)
{
    if (opt_scrypt)
        scrypt_regenhash(work);
#ifdef USE_KECCAK
    else if (opt_keccak)
        keccak_regenhash(work);
#endif
#ifdef USE_SKEIN
    else if (opt_skein)
        skein_regenhash(work);
#endif
#ifdef USE_HEAVY
    else if (opt_heavy)
        heavy_regenhash(work);
#endif
#ifdef USE_HEFTY
    else if (opt_hefty)
        hefty_regenhash(work);
#endif
    else
        regen_hash(work);
}

static bool cnx_needed(struct pool *pool);

/* Find the pool that currently has the highest priority */
static struct pool *priority_pool(int choice)
{
    struct pool *ret = NULL;
    int i;

    for (i = 0; i < total_pools; i++) {
        struct pool *pool = pools[i];

        if (pool->prio == choice) {
            ret = pool;
            break;
        }
    }

    if (unlikely(!ret)) {
        applog(LOG_ERR, "WTF No pool %d found!", choice);
        return pools[choice];
    }
    return ret;
}

static void clear_pool_work(struct pool *pool);

/* Specifies whether we can switch to this pool or not. */
static bool pool_unusable(struct pool *pool)
{
    if (pool->idle)
        return true;
    if (pool->enabled != POOL_ENABLED)
        return true;
    return false;
}

void switch_pools(struct pool *selected)
{
    struct pool *pool, *last_pool;
    int i, pool_no, next_pool;

    cg_wlock(&control_lock);
    last_pool = currentpool;
    pool_no = currentpool->pool_no;

    /* Switch selected to pool number 0 and move the rest down */
    if (selected) {
        if (selected->prio != 0) {
            for (i = 0; i < total_pools; i++) {
                pool = pools[i];
                if (pool->prio < selected->prio)
                    pool->prio++;
            }
            selected->prio = 0;
        }
    }

    switch (pool_strategy) {
        /* All of these set to the master pool */
        case POOL_BALANCE:
        case POOL_FAILOVER:
        case POOL_LOADBALANCE:
            for (i = 0; i < total_pools; i++) {
                pool = priority_pool(i);
                if (pool_unusable(pool))
                    continue;
                pool_no = pool->pool_no;
                break;
            }
            break;
        /* Both of these simply increment and cycle */
        case POOL_ROUNDROBIN:
        case POOL_ROTATE:
            if (selected && !selected->idle) {
                pool_no = selected->pool_no;
                break;
            }
            next_pool = pool_no;
            /* Select the next alive pool */
            for (i = 1; i < total_pools; i++) {
                next_pool++;
                if (next_pool >= total_pools)
                    next_pool = 0;
                pool = pools[next_pool];
                if (pool_unusable(pool))
                    continue;
                pool_no = next_pool;
                break;
            }
            break;
        default:
            break;
    }

    currentpool = pools[pool_no];
    pool = currentpool;
    cg_wunlock(&control_lock);

    /* Set the lagging flag to avoid pool not providing work fast enough
     * messages in failover only mode since  we have to get all fresh work
     * as in restart_threads */
    if (opt_fail_only)
        pool_tset(pool, &pool->lagging);

    if (pool != last_pool && pool_strategy != POOL_LOADBALANCE && pool_strategy != POOL_BALANCE) {
        applog(LOG_WARNING, "Switching to %s", pool->poolname);
        if (pool_localgen(pool) || opt_fail_only)
            clear_pool_work(last_pool);
    }

    mutex_lock(&lp_lock);
    pthread_cond_broadcast(&lp_cond);
    mutex_unlock(&lp_lock);

}

void discard_work(struct work *work)
{
    if (!work->clone && !work->rolls && !work->mined) {
        if (work->pool) {
            work->pool->discarded_work++;
            work->pool->quota_used--;
            work->pool->works--;
        }
        total_discarded++;
        applog(LOG_DEBUG, "Discarded work");
    } else
        applog(LOG_DEBUG, "Discarded cloned or rolled work");
    free_work(work);
}

static void wake_gws(void)
{
    mutex_lock(stgd_lock);
    pthread_cond_signal(&gws_cond);
    mutex_unlock(stgd_lock);
}

static void discard_stale(void)
{
    struct work *work, *tmp;
    int stale = 0;

    mutex_lock(stgd_lock);
    HASH_ITER(hh, staged_work, work, tmp) {
        if (stale_work(work, false)) {
            HASH_DEL(staged_work, work);
            discard_work(work);
            stale++;
        }
    }
    pthread_cond_signal(&gws_cond);
    mutex_unlock(stgd_lock);

    if (stale)
        applog(LOG_DEBUG, "Discarded %d stales that didn't match current hash", stale);
}

/* A generic wait function for threads that poll that will wait a specified
 * time tdiff waiting on the pthread conditional that is broadcast when a
 * work restart is required. Returns the value of pthread_cond_timedwait
 * which is zero if the condition was met or ETIMEDOUT if not.
 */
int restart_wait(struct thr_info *thr, unsigned int mstime)
{
    struct timeval now, then, tdiff;
    struct timespec abstime;
    int rc;

    tdiff.tv_sec = mstime / 1000;
    tdiff.tv_usec = mstime * 1000 - (tdiff.tv_sec * 1000000);
    cgtime(&now);
    timeradd(&now, &tdiff, &then);
    abstime.tv_sec = then.tv_sec;
    abstime.tv_nsec = then.tv_usec * 1000;

    mutex_lock(&restart_lock);
    if (thr->work_restart)
        rc = 0;
    else
        rc = pthread_cond_timedwait(&restart_cond, &restart_lock, &abstime);
    mutex_unlock(&restart_lock);

    return rc;
}
    
static void flush_queue(struct cgpu_info *cgpu);

static void restart_threads(void)
{
    struct pool *cp = current_pool();
    struct cgpu_info *cgpu;
    int i;

    /* Artificially set the lagging flag to avoid pool not providing work
     * fast enough  messages after every long poll */
    pool_tset(cp, &cp->lagging);

    /* Discard staged work that is now stale */
    discard_stale();

    rd_lock(&mining_thr_lock);
    for (i = 0; i < mining_threads; i++) {
        cgpu = mining_thr[i]->cgpu;
        if (unlikely(!cgpu))
            continue;
        mining_thr[i]->work_restart = true;
        flush_queue(cgpu);
        cgpu->drv->flush_work(cgpu);
    }
    rd_unlock(&mining_thr_lock);

    mutex_lock(&restart_lock);
    pthread_cond_broadcast(&restart_cond);
    mutex_unlock(&restart_lock);

#ifdef USE_USBUTILS
    /* Cancels any cancellable usb transfers. Flagged as such it means they
     * are usualy waiting on a read result and it's safe to abort the read
     * early. */
    cancel_usb_transfers();
#endif
}

static void signal_work_update(void)
{
    int i;

    applog(LOG_INFO, "Work update message received");

    rd_lock(&mining_thr_lock);
    for (i = 0; i < mining_threads; i++)
        mining_thr[i]->work_update = true;
    rd_unlock(&mining_thr_lock);
}

static void set_curblock(char *hexstr, unsigned char *bedata)
{
    int ofs;

    cg_wlock(&ch_lock);
    cgtime(&block_timeval);
    strcpy(current_hash, hexstr);
    memcpy(current_block, bedata, 32);
    get_timestamp(blocktime, sizeof(blocktime), &block_timeval);
    cg_wunlock(&ch_lock);

    for (ofs = 0; ofs <= 56; ofs++) {
        if (memcmp(&current_hash[ofs], "0", 1))
            break;
    }
    strncpy(prev_block, &current_hash[ofs], 8);
    prev_block[8] = '\0';

    applog(LOG_INFO, "New block: %s... diff %s", current_hash, block_diff);
}

/* Search to see if this string is from a block that has been seen before */
static bool block_exists(char *hexstr)
{
    struct block *s;

    rd_lock(&blk_lock);
    HASH_FIND_STR(blocks, hexstr, s);
    rd_unlock(&blk_lock);

    if (s)
        return true;
    return false;
}

/* Tests if this work is from a block that has been seen before */
static inline bool from_existing_block(struct work *work)
{
    char *hexstr = bin2hex(work->data + 8, 18);
    bool ret;

    ret = block_exists(hexstr);
    free(hexstr);
    return ret;
}

static int block_sort(struct block *blocka, struct block *blockb)
{
    return blocka->block_no - blockb->block_no;
}

/* Decode the current block difficulty which is in packed form */
static void set_blockdiff(const struct work *work)
{
    uint32_t bitscopy;
    memcpy(&bitscopy, work->data + 72, 4);
    uint8_t pow = *((uint8_t *)&bitscopy);
    int powdiff = (8 * (0x1d - 3)) - (8 * (pow - 3));
    uint32_t diff32 = be32toh(bitscopy) & 0x00FFFFFF;
    double numerator = 0xFFFFULL << powdiff;
    double ddiff = numerator / (double)diff32;

    if (unlikely(current_diff != ddiff)) {
        work->pool->last_block_diff = ddiff;
        suffix_string(ddiff, block_diff, sizeof(block_diff), 0);
        current_diff = ddiff;
        sprintf(block_poolname, "%s", work->pool->poolname);
        applog(opt_morenotices ? LOG_NOTICE : LOG_DEBUG, "Network diff %f set to %s", ddiff, block_diff);
    }
}

static bool test_work_current(struct work *work)
{
    struct pool *pool = work->pool;
    unsigned char bedata[32];
    char hexstr[68];
    bool ret = true;

    if (work->mandatory)
        return ret;

    swap256(bedata, work->data + 4);
    __bin2hex(hexstr, bedata, 32);

    /* Search to see if this block exists yet and if not, consider it a
     * new block and set the current block details to this one */
    if (!block_exists(hexstr)) {
        struct block *s = calloc(sizeof(struct block), 1);
        int deleted_block = 0;

        if (unlikely(!s))
            quit (1, "test_work_current OOM");
        strcpy(s->hash, hexstr);
        s->block_no = new_blocks++;

        wr_lock(&blk_lock);
        /* Only keep the last hour's worth of blocks in memory since
         * work from blocks before this is virtually impossible and we
         * want to prevent memory usage from continually rising */
        if (HASH_COUNT(blocks) > 6) {
            struct block *oldblock;

            HASH_SORT(blocks, block_sort);
            oldblock = blocks;
            deleted_block = oldblock->block_no;
            HASH_DEL(blocks, oldblock);
            free(oldblock);
        }
        HASH_ADD_STR(blocks, hash, s);
        set_blockdiff(work);
        wr_unlock(&blk_lock);

        if (deleted_block)
            applog(LOG_DEBUG, "Deleted block %d from database", deleted_block);
        set_curblock(hexstr, bedata);
        /* Copy the information to this pool's prev_block since it
         * knows the new block exists. */
        memcpy(pool->prev_block, bedata, 32);
        if (unlikely(new_blocks == 1)) {
            ret = false;
            goto out;
        }

        work->work_block = ++work_block;

        if (opt_morenotices)
        {
            if (work->longpoll) {
                if (work->stratum) {
                    applog(LOG_NOTICE, "Stratum from %s detected new block", pool->poolname);
                } else {
                    applog(LOG_NOTICE, "%sLONGPOLL from %s detected new block",
                           work->gbt ? "GBT " : "", work->pool->poolname);
                }
            } else if (have_longpoll)
                applog(LOG_NOTICE, "New block detected on network before longpoll");
            else
                applog(LOG_NOTICE, "New block detected on network");
        }
        restart_threads();
    } else {
        if (memcmp(pool->prev_block, bedata, 32)) {
            /* Work doesn't match what this pool has stored as
             * prev_block. Let's see if the work is from an old
             * block or the pool is just learning about a new
             * block. */
            if (memcmp(bedata, current_block, 32)) {
                /* Doesn't match current block. It's stale */
                applog(LOG_DEBUG, "Stale data from %s", pool->poolname);
                ret = false;
            } else {
                /* Work is from new block and pool is up now
                 * current. */
                applog(LOG_INFO, "%s now up to date", pool->poolname);
                memcpy(pool->prev_block, bedata, 32);
            }
        }
#if 0
        /* This isn't ideal, this pool is still on an old block but
         * accepting shares from it. To maintain fair work distribution
         * we work on it anyway. */
        if (memcmp(bedata, current_block, 32))
            applog(LOG_DEBUG, "%s still on old block", pool->poolname);
#endif
        if (work->longpoll) {
            work->work_block = ++work_block;
            if (shared_strategy() || work->pool == current_pool()) {
                if (opt_morenotices)
                    if (work->stratum) {
                        applog(LOG_NOTICE, "Stratum from %s requested work restart", pool->poolname);
                    } else {
                        applog(LOG_NOTICE, "%sLONGPOLL from %s requested work restart", work->gbt ? "GBT " : "", work->pool->poolname);
                    }
                restart_threads();
            }
        }
    }
out:
    work->longpoll = false;

    return ret;
}

static int tv_sort(struct work *worka, struct work *workb)
{
    return worka->tv_staged.tv_sec - workb->tv_staged.tv_sec;
}

static bool work_rollable(struct work *work)
{
    return (!work->clone && work->rolltime);
}

static bool hash_push(struct work *work)
{
    bool rc = true;

    mutex_lock(stgd_lock);
    if (work_rollable(work))
        staged_rollable++;
    if (likely(!getq->frozen)) {
        HASH_ADD_INT(staged_work, id, work);
        HASH_SORT(staged_work, tv_sort);
    } else
        rc = false;
    pthread_cond_broadcast(&getq->cond);
    mutex_unlock(stgd_lock);

    return rc;
}

static void *stage_thread(void *userdata)
{
    struct thr_info *mythr = userdata;
    bool ok = true;

    pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

    RenameThread("stage");

    while (ok) {
        struct work *work = NULL;

        applog(LOG_DEBUG, "Popping work to stage thread");

        work = tq_pop(mythr->q, NULL);
        if (unlikely(!work)) {
            applog(LOG_ERR, "Failed to tq_pop in stage_thread");
            ok = false;
            break;
        }
        work->work_block = work_block;

        test_work_current(work);

        applog(LOG_DEBUG, "Pushing work to getwork queue");

        if (unlikely(!hash_push(work))) {
            applog(LOG_WARNING, "Failed to hash_push in stage_thread");
            continue;
        }
    }

    tq_freeze(mythr->q);
    return NULL;
}

static void stage_work(struct work *work)
{
    applog(LOG_DEBUG, "Pushing work from %s to hash queue", work->pool->poolname);
    work->work_block = work_block;
    test_work_current(work);
    work->pool->works++;
    hash_push(work);
}

#ifdef HAVE_CURSES
int curses_int(const char *query)
{
    int ret;
    char *cvar;

    cvar = curses_input(query);
    ret = atoi(cvar);
    free(cvar);
    return ret;
}
#endif

#ifdef HAVE_CURSES
static bool input_pool(bool live);
#endif

#ifdef HAVE_CURSES
static void display_pool_summary(struct pool *pool)
{
    double efficiency = 0.0;

    if (curses_active_locked()) {
        wlog("Pool: %s\n", pool->rpc_url);
        if (pool->solved)
            wlog("SOLVED %d BLOCK%s!\n", pool->solved, pool->solved > 1 ? "S" : "");
        if (!pool->has_stratum)
            wlog("%s own long-poll support\n", pool->hdr_path ? "Has" : "Does not have");
        wlog(" Queued work requests: %d\n", pool->getwork_requested);
        wlog(" Share submissions: %d\n", pool->accepted + pool->rejected);
        wlog(" Accepted shares: %d\n", pool->accepted);
        wlog(" Rejected shares: %d\n", pool->rejected);
        wlog(" Accepted difficulty shares: %1.f\n", pool->diff_accepted);
        wlog(" Rejected difficulty shares: %1.f\n", pool->diff_rejected);
        if (pool->accepted || pool->rejected)
            wlog(" Reject ratio: %.1f%%\n", (double)(pool->rejected * 100) / (double)(pool->accepted + pool->rejected));
        efficiency = pool->getwork_requested ? pool->accepted * 100.0 / pool->getwork_requested : 0.0;
        if (!pool_localgen(pool))
            wlog(" Efficiency (accepted / queued): %.0f%%\n", efficiency);

        wlog(" Items worked on: %d\n", pool->works);
        wlog(" Discarded work due to new blocks: %d\n", pool->discarded_work);
        wlog(" Stale submissions discarded due to new blocks: %d\n", pool->stale_shares);
        wlog(" Unable to get work from server occasions: %d\n", pool->getfail_occasions);
        wlog(" Submitting work remotely delay occasions: %d\n\n", pool->remotefail_occasions);
        unlock_curses();
    }
}
#endif

/* We can't remove the memory used for this struct pool because there may
 * still be work referencing it. We just remove it from the pools list */
void remove_pool(struct pool *pool)
{
    int i, last_pool = total_pools - 1;
    struct pool *other;

    /* Boost priority of any lower prio than this one */
    for (i = 0; i < total_pools; i++) {
        other = pools[i];
        if (other->prio > pool->prio)
            other->prio--;
    }

    if (pool->pool_no < last_pool) {
        /* Swap the last pool for this one */
        (pools[last_pool])->pool_no = pool->pool_no;
        pools[pool->pool_no] = pools[last_pool];
    }
    /* Give it an invalid number */
    pool->pool_no = total_pools;
    pool->removed = true;
    total_pools--;
}

/* add a mutex if this needs to be thread safe in the future */
static struct JE {
    char *buf;
    struct JE *next;
} *jedata = NULL;

static void json_escape_free()
{
    struct JE *jeptr = jedata;
    struct JE *jenext;

    jedata = NULL;

    while (jeptr) {
        jenext = jeptr->next;
        free(jeptr->buf);
        free(jeptr);
        jeptr = jenext;
    }
}

static char *json_escape(char *str)
{
    struct JE *jeptr;
    char *buf, *ptr;

    /* 2x is the max, may as well just allocate that */
    ptr = buf = malloc(strlen(str) * 2 + 1);

    jeptr = malloc(sizeof(*jeptr));

    jeptr->buf = buf;
    jeptr->next = jedata;
    jedata = jeptr;

    while (*str) {
        if (*str == '\\' || *str == '"')
            *(ptr++) = '\\';

        *(ptr++) = *(str++);
    }

    *ptr = '\0';

    return buf;
}

void write_config(FILE *fcfg)
{
    int i;

    /* Write pool values */
    fputs("{\n\"pools\" : [", fcfg);
    for(i = 0; i < total_pools; i++) {
        struct pool *pool = pools[i];

        if (pool->quota != 1) {
            fprintf(fcfg, "%s\n\t{\n\t\t\"quota\" : \"%s%s%s%d;%s\",", i > 0 ? "," : "",
                pool->rpc_proxy ? json_escape((char *)proxytype(pool->rpc_proxytype)) : "",
                pool->rpc_proxy ? json_escape(pool->rpc_proxy) : "",
                pool->rpc_proxy ? "|" : "",
                pool->quota,
                json_escape(pool->rpc_url));
        } else {
            fprintf(fcfg, "%s\n\t{\n\t\t\"url\" : \"%s%s%s%s\",", i > 0 ? "," : "",
                pool->rpc_proxy ? json_escape((char *)proxytype(pool->rpc_proxytype)) : "",
                pool->rpc_proxy ? json_escape(pool->rpc_proxy) : "",
                pool->rpc_proxy ? "|" : "",
                json_escape(pool->rpc_url));
        }
        fprintf(fcfg, "\n\t\t\"user\" : \"%s\",", json_escape(pool->rpc_user));
        fprintf(fcfg, "\n\t\t\"pass\" : \"%s\"\n\t}", json_escape(pool->rpc_pass));
        }
    fputs("\n]\n", fcfg);

#ifdef HAVE_OPENCL
    if (nDevs) {
        /* Write GPU device values */
        if ((nDevs > 0) && (gpus[0].intensity > 0)) {
            fputs(",\n\"intensity\" : \"", fcfg);
            for(i = 0; i < nDevs; i++)
                fprintf(fcfg, gpus[i].dynamic ? "%sd" : "%s%d", i > 0 ? "," : "", gpus[i].intensity);
        } else if ((nDevs > 0) && (gpus[0].xintensity > 0)) {
            fputs(",\n\"xintensity\" : \"", fcfg);
            for(i = 0; i < nDevs; i++)
                fprintf(fcfg, "%s%d", i > 0 ? "," : "", gpus[i].xintensity);
        } else if ((nDevs > 0) && (gpus[0].rawintensity > 0)) {
            fputs(",\n\"rawintensity\" : \"", fcfg);
            for(i = 0; i < nDevs; i++)
                fprintf(fcfg, "%s%d", i > 0 ? "," : "", gpus[i].rawintensity);
        };
        fputs("\",\n\"vectors\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "",
                gpus[i].vwidth);
        fputs("\",\n\"worksize\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "",
                (int)gpus[i].work_size);
        if (!opt_scrypt) {
            fputs("\",\n\"kernel\" : \"", fcfg);
            for(i = 0; i < nDevs; i++) {
                fprintf(fcfg, "%s", i > 0 ? "," : "");
                switch (gpus[i].kernel) {
                    case KL_NONE: // Shouldn't happen
                        break;
                    case KL_POCLBM:
                        fprintf(fcfg, "poclbm");
                        break;
                    case KL_PHATK:
                        fprintf(fcfg, "phatk");
                        break;
                    case KL_DIAKGCN:
                        fprintf(fcfg, "diakgcn");
                        break;
                    case KL_DIABLO:
                        fprintf(fcfg, "diablo");
                        break;
                    case KL_SCRYPT:
                        fprintf(fcfg, "scrypt");
                        break;
                    case KL_KECCAK:
                        fprintf(fcfg, "keccak");
                        break;
                    case KL_SKEIN:
                        fprintf(fcfg, "skein");
                        break;
                    case KL_HEAVY:
                        fprintf(fcfg, "heavy");
                        break;
                    case KL_HEFTY:
                        fprintf(fcfg, "hefty");
                        break;
                }
            }
        };
#ifdef USE_SCRYPT
        if ((nDevs > 0) && (gpus[0].cl_filename)) {
            fputs("\",\n\"cl-filename\" : \"", fcfg);
            for(i = 0; i < nDevs; i++)
                fprintf(fcfg, "%s%s", i > 0 ? "," : "", gpus[i].cl_filename);
        };
        fputs("\",\n\"lookup-gap\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "", (int)gpus[i].opt_lg);
        fputs("\",\n\"gpu-threads\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "", gpus[i].threads, gpus[i].threads);
        fputs("\",\n\"thread-concurrency\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "", (int)gpus[i].opt_tc);
        if ((nDevs > 0) && (gpus[0].shaders > 0)) {
            fputs("\",\n\"shaders\" : \"", fcfg);
            for(i = 0; i < nDevs; i++)
                fprintf(fcfg, "%s%d", i > 0 ? "," : "", (int)gpus[i].shaders);
        }
#endif
#ifdef HAVE_ADL
        fputs("\",\n\"gpu-engine\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, gpus[i].gpu_engine_exit != gpus[i].gpu_engine ? "%s%d-%d:%d" : "%s%d-%d",
            i > 0 ? "," : "", gpus[i].min_engine, gpus[i].gpu_engine, gpus[i].gpu_engine_exit);
        fputs("\",\n\"gpu-fan\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d-%d", i > 0 ? "," : "", gpus[i].min_fan, gpus[i].gpu_fan);
        fputs("\",\n\"gpu-memclock\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, gpus[i].gpu_memclock_exit != gpus[i].gpu_memclock ? "%s%d:%d" : "%s%d",
            i > 0 ? "," : "", gpus[i].gpu_memclock, gpus[i].gpu_memclock_exit);
        fputs("\",\n\"gpu-memdiff\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "", gpus[i].gpu_memdiff);
        fputs("\",\n\"gpu-powertune\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "", gpus[i].gpu_powertune);
        fputs("\",\n\"gpu-vddc\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%1.3f", i > 0 ? "," : "", gpus[i].gpu_vddc);
        fputs("\",\n\"temp-cutoff\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "", gpus[i].cutofftemp);
        fputs("\",\n\"temp-overheat\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "", gpus[i].adl.overtemp);
        fputs("\",\n\"temp-target\" : \"", fcfg);
        for(i = 0; i < nDevs; i++)
            fprintf(fcfg, "%s%d", i > 0 ? "," : "", gpus[i].adl.targettemp);
#endif
        fputs("\"", fcfg);
    }
#endif
#ifdef HAVE_ADL
    if (opt_reorder)
        fprintf(fcfg, ",\n\"gpu-reorder\" : true");
#endif

    /* Simple bool and int options */
    struct opt_table *opt;
    for (opt = opt_config_table; opt->type != OPT_END; opt++) {
        char *p, *name = strdup(opt->names);
        for (p = strtok(name, "|"); p; p = strtok(NULL, "|")) {
            if (p[1] != '-')
                continue;
            if (opt->type & OPT_NOARG &&
               ((void *)opt->cb == (void *)opt_set_bool || (void *)opt->cb == (void *)opt_set_invbool) &&
               (*(bool *)opt->u.arg == ((void *)opt->cb == (void *)opt_set_bool)))
                fprintf(fcfg, ",\n\"%s\" : true", p+2);

            if (opt->type & OPT_HASARG &&
               ((void *)opt->cb_arg == (void *)set_int_0_to_9999 ||
               (void *)opt->cb_arg == (void *)set_int_1_to_65535 ||
               (void *)opt->cb_arg == (void *)set_int_0_to_10 ||
               (void *)opt->cb_arg == (void *)set_int_1_to_10) && opt->desc != opt_hidden)
                fprintf(fcfg, ",\n\"%s\" : \"%d\"", p+2, *(int *)opt->u.arg);
        }
    }

    /* Special case options */
    fprintf(fcfg, ",\n\"shares\" : \"%d\"", opt_shares);
    if (pool_strategy == POOL_BALANCE)
        fputs(",\n\"balance\" : true", fcfg);
    if (pool_strategy == POOL_LOADBALANCE)
        fputs(",\n\"load-balance\" : true", fcfg);
    if (pool_strategy == POOL_ROUNDROBIN)
        fputs(",\n\"round-robin\" : true", fcfg);
    if (pool_strategy == POOL_ROTATE)
        fprintf(fcfg, ",\n\"rotate\" : \"%d\"", opt_rotate_period);
#if defined(unix) || defined(__APPLE__)
    if (opt_stderr_cmd && *opt_stderr_cmd)
        fprintf(fcfg, ",\n\"monitor\" : \"%s\"", json_escape(opt_stderr_cmd));
#endif // defined(unix)
    if (opt_kernel_path && *opt_kernel_path) {
        char *kpath = strdup(opt_kernel_path);
        if (kpath[strlen(kpath)-1] == '/')
            kpath[strlen(kpath)-1] = 0;
        fprintf(fcfg, ",\n\"kernel-path\" : \"%s\"", json_escape(kpath));
    }
    if (schedstart.enable)
        fprintf(fcfg, ",\n\"sched-time\" : \"%d:%d\"", schedstart.tm.tm_hour, schedstart.tm.tm_min);
    if (schedstop.enable)
        fprintf(fcfg, ",\n\"stop-time\" : \"%d:%d\"", schedstop.tm.tm_hour, schedstop.tm.tm_min);
    if (opt_socks_proxy && *opt_socks_proxy)
        fprintf(fcfg, ",\n\"socks-proxy\" : \"%s\"", json_escape(opt_socks_proxy));
    if (opt_devs_enabled) {
        fprintf(fcfg, ",\n\"device\" : \"");
        bool extra_devs = false;

        for (i = 0; i < MAX_DEVICES; i++) {
            if (devices_enabled[i]) {
                int startd = i;

                if (extra_devs)
                    fprintf(fcfg, ",");
                while (i < MAX_DEVICES && devices_enabled[i + 1])
                    ++i;
                fprintf(fcfg, "%d", startd);
                if (i > startd)
                    fprintf(fcfg, "-%d", i);
            }
        }
        fprintf(fcfg, "\"");
    }
    if (opt_removedisabled)
        fprintf(fcfg, ",\n\"remove-disabled\" : true");
    if (opt_api_allow)
        fprintf(fcfg, ",\n\"api-allow\" : \"%s\"", json_escape(opt_api_allow));
    if (strcmp(opt_api_mcast_addr, API_MCAST_ADDR) != 0)
        fprintf(fcfg, ",\n\"api-mcast-addr\" : \"%s\"", json_escape(opt_api_mcast_addr));
    if (strcmp(opt_api_mcast_code, API_MCAST_CODE) != 0)
        fprintf(fcfg, ",\n\"api-mcast-code\" : \"%s\"", json_escape(opt_api_mcast_code));
    if (*opt_api_mcast_des)
        fprintf(fcfg, ",\n\"api-mcast-des\" : \"%s\"", json_escape(opt_api_mcast_des));
    if (strcmp(opt_api_description, PACKAGE_STRING) != 0)
        fprintf(fcfg, ",\n\"api-description\" : \"%s\"", json_escape(opt_api_description));
    if (opt_api_groups)
        fprintf(fcfg, ",\n\"api-groups\" : \"%s\"", json_escape(opt_api_groups));
    if (opt_icarus_options)
        fprintf(fcfg, ",\n\"icarus-options\" : \"%s\"", json_escape(opt_icarus_options));
    if (opt_icarus_timing)
        fprintf(fcfg, ",\n\"icarus-timing\" : \"%s\"", json_escape(opt_icarus_timing));
#ifdef USE_KLONDIKE
    if (opt_klondike_options)
        fprintf(fcfg, ",\n\"klondike-options\" : \"%s\"", json_escape(opt_icarus_options));
#endif
#ifdef USE_USBUTILS
    if (opt_usb_select)
        fprintf(fcfg, ",\n\"usb\" : \"%s\"", json_escape(opt_usb_select));
#endif
    fputs("\n}\n", fcfg);

    json_escape_free();
}

void zero_bestshare(void)
{
    int i;

    best_diff = 0;
    memset(best_share, 0, 8);
    suffix_string(best_diff, best_share, sizeof(best_share), 0);

    for (i = 0; i < total_pools; i++) {
        struct pool *pool = pools[i];
        pool->best_diff = 0;
    }
}

void zero_stats(void)
{
    int i;

    cgtime(&total_tv_start);
    total_rolling = 0;
    total_mhashes_done = 0;
    total_getworks = 0;
    total_accepted = 0;
    total_rejected = 0;
    hw_errors = 0;
    total_stale = 0;
    total_discarded = 0;
    local_work = 0;
    total_go = 0;
    total_ro = 0;
    total_secs = 1.0;
    total_diff1 = 0;
    found_blocks = 0;
    total_diff_accepted = 0;
    total_diff_rejected = 0;
    total_diff_stale = 0;

    for (i = 0; i < total_pools; i++) {
        struct pool *pool = pools[i];

        pool->getwork_requested = 0;
        pool->accepted = 0;
        pool->rejected = 0;
        pool->stale_shares = 0;
        pool->discarded_work = 0;
        pool->getfail_occasions = 0;
        pool->remotefail_occasions = 0;
        pool->disconnect_occasions = 0;
        pool->last_share_time = 0;
        pool->diff1 = 0;
        pool->diff_accepted = 0;
        pool->diff_rejected = 0;
        pool->diff_stale = 0;
        pool->last_share_diff = 0;
        pool->last_block_diff = 0;
    }

    zero_bestshare();

    for (i = 0; i < total_devices; ++i) {
        struct cgpu_info *cgpu = get_devices(i);

        mutex_lock(&hash_lock);
        cgpu->total_mhashes = 0;
        cgpu->accepted = 0;
        cgpu->rejected = 0;
        cgpu->hw_errors = 0;
        cgpu->utility = 0.0;
        cgpu->last_share_pool_time = 0;
        cgpu->diff1 = 0;
        cgpu->diff_accepted = 0;
        cgpu->diff_rejected = 0;
        cgpu->last_share_diff = 0;
        mutex_unlock(&hash_lock);
    }
}

#ifdef HAVE_CURSES
static void display_pools(void)
{
    struct pool *pool;
    int selected, i;
    char input;

    opt_loginput = true;
    immedok(logwin, true);
    clear_logwin();
updated:
    for (i = 0; i < total_pools; i++) {
        pool = pools[i];

        if (pool == current_pool())
            wattron(logwin, A_BOLD);
        if (pool->enabled != POOL_ENABLED)
            wattron(logwin, A_DIM);
        wlogprint("%d: ", pool->pool_no);
        switch (pool->enabled) {
            case POOL_ENABLED:
                wlogprint("Enabled ");
                break;
            case POOL_DISABLED:
                wlogprint("Disabled ");
                break;
            case POOL_REJECTING:
                wlogprint("Rejecting ");
                break;
        }
        wlogprint("%s Quota %d Prio %d: %s  User:%s\n",
            pool->idle? "Dead" : "Alive",
            pool->quota,
            pool->prio,
            pool->rpc_url, pool->rpc_user);
        wattroff(logwin, A_BOLD | A_DIM);
    }
retry:
    wlogprint("\nCurrent pool management strategy: %s\n",
        strategies[pool_strategy].s);
    if (pool_strategy == POOL_ROTATE)
        wlogprint("Set to rotate every %d minutes\n", opt_rotate_period);
    wlogprint("[F]ailover only %s\n", opt_fail_only ? "enabled" : "disabled");
    wlogprint("Pool [A]dd [R]emove [D]isable [E]nable [Q]uota change\n");
    wlogprint("[C]hange management strategy [S]witch pool [I]nformation\n");
    wlogprint("Or press any other key to continue\n");
    logwin_update();
    input = getch();

    if (!strncasecmp(&input, "a", 1)) {
        input_pool(true);
        goto updated;
    } else if (!strncasecmp(&input, "r", 1)) {
        if (total_pools <= 1) {
            wlogprint("Cannot remove last pool");
            goto retry;
        }
        selected = curses_int("Select pool number");
        if (selected < 0 || selected >= total_pools) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        pool = pools[selected];
        if (pool == current_pool())
            switch_pools(NULL);
        if (pool == current_pool()) {
            wlogprint("Unable to remove pool due to activity\n");
            goto retry;
        }
        disable_pool(pool);
        remove_pool(pool);
        goto updated;
    } else if (!strncasecmp(&input, "s", 1)) {
        selected = curses_int("Select pool number");
        if (selected < 0 || selected >= total_pools) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        pool = pools[selected];
        enable_pool(pool);
        switch_pools(pool);
        goto updated;
    } else if (!strncasecmp(&input, "d", 1)) {
        if (enabled_pools <= 1) {
            wlogprint("Cannot disable last pool");
            goto retry;
        }
        selected = curses_int("Select pool number");
        if (selected < 0 || selected >= total_pools) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        pool = pools[selected];
        disable_pool(pool);
        if (pool == current_pool())
            switch_pools(NULL);
        goto updated;
    } else if (!strncasecmp(&input, "e", 1)) {
        selected = curses_int("Select pool number");
        if (selected < 0 || selected >= total_pools) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        pool = pools[selected];
        enable_pool(pool);
        if (pool->prio < current_pool()->prio)
            switch_pools(pool);
        goto updated;
    } else if (!strncasecmp(&input, "c", 1)) {
        for (i = 0; i <= TOP_STRATEGY; i++)
            wlogprint("%d: %s\n", i, strategies[i].s);
        selected = curses_int("Select strategy number type");
        if (selected < 0 || selected > TOP_STRATEGY) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        if (selected == POOL_ROTATE) {
            opt_rotate_period = curses_int("Select interval in minutes");

            if (opt_rotate_period < 0 || opt_rotate_period > 9999) {
                opt_rotate_period = 0;
                wlogprint("Invalid selection\n");
                goto retry;
            }
        }
        pool_strategy = selected;
        switch_pools(NULL);
        goto updated;
    } else if (!strncasecmp(&input, "i", 1)) {
        selected = curses_int("Select pool number");
        if (selected < 0 || selected >= total_pools) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        pool = pools[selected];
        display_pool_summary(pool);
        goto retry;
    } else if (!strncasecmp(&input, "q", 1)) {
        selected = curses_int("Select pool number");
        if (selected < 0 || selected >= total_pools) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        pool = pools[selected];
        selected = curses_int("Set quota");
        if (selected < 0) {
            wlogprint("Invalid negative quota\n");
            goto retry;
        }
        pool->quota = selected;
        adjust_quota_gcd();
        goto updated;
    } else if (!strncasecmp(&input, "f", 1)) {
        opt_fail_only ^= true;
        goto updated;
    } else
        clear_logwin();

    immedok(logwin, false);
    opt_loginput = false;
}

static void display_options(void)
{
    int selected;
    char input;

    opt_loginput = true;
    immedok(logwin, true);
    clear_logwin();
retry:
    wlogprint("[N]ormal [C]lear [S]ilent mode (disable all output)\n");
    wlogprint("[D]ebug:%s\n[P]er-device:%s\n[Q]uiet:%s\n[V]erbose:%s\n"
          "[R]PC debug:%s\n[W]orkTime details:%s\nco[M]pact: %s\n"
          "[L]og interval:%d\n[Z]ero statistics\n",
        opt_debug ? "on" : "off",
            want_per_device_stats? "on" : "off",
        opt_quiet ? "on" : "off",
        opt_log_output ? "on" : "off",
        opt_protocol ? "on" : "off",
        opt_worktime ? "on" : "off",
        opt_compact ? "on" : "off",
        opt_log_interval);
    wlogprint("Select an option or any other key to return\n");
    logwin_update();
    input = getch();
    if (!strncasecmp(&input, "q", 1)) {
        opt_quiet ^= true;
        wlogprint("Quiet mode %s\n", opt_quiet ? "enabled" : "disabled");
        goto retry;
    } else if (!strncasecmp(&input, "v", 1)) {
        opt_log_output ^= true;
        if (opt_log_output)
            opt_quiet = false;
        wlogprint("Verbose mode %s\n", opt_log_output ? "enabled" : "disabled");
        goto retry;
    } else if (!strncasecmp(&input, "n", 1)) {
        opt_log_output = false;
        opt_debug = false;
        opt_quiet = false;
        opt_protocol = false;
        opt_compact = false;
        want_per_device_stats = false;
        wlogprint("Output mode reset to normal\n");
        switch_logsize(false);
        goto retry;
    } else if (!strncasecmp(&input, "d", 1)) {
        opt_debug ^= true;
        opt_log_output = opt_debug;
        if (opt_debug)
            opt_quiet = false;
        wlogprint("Debug mode %s\n", opt_debug ? "enabled" : "disabled");
        goto retry;
    } else if (!strncasecmp(&input, "m", 1)) {
        opt_compact ^= true;
        wlogprint("Compact mode %s\n", opt_compact ? "enabled" : "disabled");
        switch_logsize(false);
        goto retry;
    } else if (!strncasecmp(&input, "p", 1)) {
        want_per_device_stats ^= true;
        opt_log_output = want_per_device_stats;
        wlogprint("Per-device stats %s\n", want_per_device_stats ? "enabled" : "disabled");
        goto retry;
    } else if (!strncasecmp(&input, "r", 1)) {
        opt_protocol ^= true;
        if (opt_protocol)
            opt_quiet = false;
        wlogprint("RPC protocol debugging %s\n", opt_protocol ? "enabled" : "disabled");
        goto retry;
    } else if (!strncasecmp(&input, "c", 1))
        clear_logwin();
    else if (!strncasecmp(&input, "l", 1)) {
        selected = curses_int("Interval in seconds");
        if (selected < 0 || selected > 9999) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        opt_log_interval = selected;
        wlogprint("Log interval set to %d seconds\n", opt_log_interval);
        goto retry;
    } else if (!strncasecmp(&input, "s", 1)) {
        opt_realquiet = true;
    } else if (!strncasecmp(&input, "w", 1)) {
        opt_worktime ^= true;
        wlogprint("WorkTime details %s\n", opt_worktime ? "enabled" : "disabled");
        goto retry;
    } else if (!strncasecmp(&input, "z", 1)) {
        zero_stats();
        goto retry;
    } else
        clear_logwin();

    immedok(logwin, false);
    opt_loginput = false;
}
#endif

void default_save_file(char *filename)
{
    if (default_config && *default_config) {
        strcpy(filename, default_config);
        return;
    }

#if defined(unix) || defined(__APPLE__)
    if (getenv("HOME") && *getenv("HOME")) {
            strcpy(filename, getenv("HOME"));
        strcat(filename, "/");
    }
    else
        strcpy(filename, "");
    strcat(filename, ".cgminer/");
    mkdir(filename, 0777);
#else
    strcpy(filename, "");
#endif
    strcat(filename, def_conf);
}

#ifdef HAVE_CURSES
static void set_options(void)
{
    int selected;
    char input;

    opt_loginput = true;
    immedok(logwin, true);
    clear_logwin();
retry:
    wlogprint("[Q]ueue: %d\n[S]cantime: %d\n[E]xpiry: %d\n"
          "[W]rite config file\n[C]gminer restart\n",
        opt_queue, opt_scantime, opt_expiry);
    wlogprint("Select an option or any other key to return\n");
    logwin_update();
    input = getch();

    if (!strncasecmp(&input, "q", 1)) {
        selected = curses_int("Extra work items to queue");
        if (selected < 0 || selected > 9999) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        opt_queue = selected;
        goto retry;
    } else if  (!strncasecmp(&input, "s", 1)) {
        selected = curses_int("Set scantime in seconds");
        if (selected < 0 || selected > 9999) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        opt_scantime = selected;
        goto retry;
    } else if  (!strncasecmp(&input, "e", 1)) {
        selected = curses_int("Set expiry time in seconds");
        if (selected < 0 || selected > 9999) {
            wlogprint("Invalid selection\n");
            goto retry;
        }
        opt_expiry = selected;
        goto retry;
    } else if  (!strncasecmp(&input, "w", 1)) {
        FILE *fcfg;
        char *str, filename[PATH_MAX], prompt[PATH_MAX + 50];

        default_save_file(filename);
        snprintf(prompt, sizeof(prompt), "Config filename to write (Enter for default) [%s]", filename);
        str = curses_input(prompt);
        if (strcmp(str, "-1")) {
            struct stat statbuf;

            strcpy(filename, str);
            free(str);
            if (!stat(filename, &statbuf)) {
                wlogprint("File exists, overwrite?\n");
                input = getch();
                if (strncasecmp(&input, "y", 1))
                    goto retry;
            }
        }
        else
            free(str);
        fcfg = fopen(filename, "w");
        if (!fcfg) {
            wlogprint("Cannot open or create file\n");
            goto retry;
        }
        write_config(fcfg);
        fclose(fcfg);
        goto retry;

    } else if (!strncasecmp(&input, "c", 1)) {
        wlogprint("Are you sure?\n");
        input = getch();
        if (!strncasecmp(&input, "y", 1))
            app_restart();
        else
            clear_logwin();
    } else
        clear_logwin();

    immedok(logwin, false);
    opt_loginput = false;
}

static void *input_thread(void __maybe_unused *userdata)
{
    pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

    RenameThread("input");

    if (!curses_active)
        return NULL;

    while (1) {
        char input;

        input = getch();
        if (!strncasecmp(&input, "q", 1)) {
            kill_work();
            return NULL;
        } else if (!strncasecmp(&input, "d", 1))
            display_options();
        else if (!strncasecmp(&input, "p", 1))
            display_pools();
        else if (!strncasecmp(&input, "s", 1))
            set_options();
#if HAVE_OPENCL
        else if (have_opencl && !strncasecmp(&input, "g", 1))
            manage_gpu();
#endif
        if (opt_realquiet) {
            disable_curses();
            break;
        }
    }

    return NULL;
}
#endif

static void *api_thread(void *userdata)
{
    struct thr_info *mythr = userdata;

    pthread_detach(pthread_self());
    pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

    RenameThread("api");

    api(api_thr_id);

    PTH(mythr) = 0L;

    return NULL;
}

/* Sole work devices are serialised wrt calling get_work so they report in on
 * each pass through their scanhash function as well as in get_work whereas
 * queued work devices work asynchronously so get them to report in and out
 * only across get_work. */
static void thread_reportin(struct thr_info *thr)
{
    thr->getwork = false;
    cgtime(&thr->last);
    thr->cgpu->status = LIFE_WELL;
    thr->cgpu->device_last_well = time(NULL);
}

/* Tell the watchdog thread this thread is waiting on get work and should not
 * be restarted */
static void thread_reportout(struct thr_info *thr)
{
    thr->getwork = true;
    cgtime(&thr->last);
    thr->cgpu->status = LIFE_WELL;
    thr->cgpu->device_last_well = time(NULL);
}

static void hashmeter(int thr_id, struct timeval *diff,
              uint64_t hashes_done)
{
    struct timeval temp_tv_end, total_diff;
    double secs;
    double local_secs;
    static double local_mhashes_done = 0;
    double local_mhashes;
    bool showlog = false;
    char displayed_hashes[16], displayed_rolling[16];
    uint64_t dh64, dr64;
    struct thr_info *thr;

    local_mhashes = (double)hashes_done / 1000000.0;
    /* Update the last time this thread reported in */
    if (thr_id >= 0) {
        thr = get_thread(thr_id);
        cgtime(&(thr->last));
        thr->cgpu->device_last_well = time(NULL);
    }

    secs = (double)diff->tv_sec + ((double)diff->tv_usec / 1000000.0);

    /* So we can call hashmeter from a non worker thread */
    if (thr_id >= 0) {
        struct cgpu_info *cgpu = thr->cgpu;
        double thread_rolling = 0.0;
        int i;

        applog(LOG_DEBUG, "[thread %d: %"PRIu64" hashes, %.1f khash/sec]",
            thr_id, hashes_done, hashes_done / 1000 / secs);

        /* Rolling average for each thread and each device */
        decay_time(&thr->rolling, local_mhashes / secs, secs);
        for (i = 0; i < cgpu->threads; i++)
            thread_rolling += cgpu->thr[i]->rolling;

        mutex_lock(&hash_lock);
        decay_time(&cgpu->rolling, thread_rolling, secs);
        cgpu->total_mhashes += local_mhashes;
        mutex_unlock(&hash_lock);

        // If needed, output detailed, per-device stats
        if (want_per_device_stats) {
            struct timeval now;
            struct timeval elapsed;

            cgtime(&now);
            timersub(&now, &thr->cgpu->last_message_tv, &elapsed);
            if (opt_log_interval <= elapsed.tv_sec) {
                struct cgpu_info *cgpu = thr->cgpu;
                char logline[255];

                cgpu->last_message_tv = now;

                get_statline(logline, sizeof(logline), cgpu);
                if (!curses_active) {
                    printf("%s          \r", logline);
                    fflush(stdout);
                } else
                    applog(LOG_INFO, "%s", logline);
            }
        }
    }

    /* Totals are updated by all threads so can race without locking */
    mutex_lock(&hash_lock);
    cgtime(&temp_tv_end);
    timersub(&temp_tv_end, &total_tv_end, &total_diff);

    total_mhashes_done += local_mhashes;
    local_mhashes_done += local_mhashes;
    /* Only update with opt_log_interval */
    if (total_diff.tv_sec < opt_log_interval)
        goto out_unlock;
    showlog = true;
    cgtime(&total_tv_end);

    local_secs = (double)total_diff.tv_sec + ((double)total_diff.tv_usec / 1000000.0);
    decay_time(&total_rolling, local_mhashes_done / local_secs, local_secs);
    global_hashrate = ((unsigned long long)lround(total_rolling)) * 1000000;

    timersub(&total_tv_end, &total_tv_start, &total_diff);
    total_secs = (double)total_diff.tv_sec +
        ((double)total_diff.tv_usec / 1000000.0);

    dh64 = (double)total_mhashes_done / total_secs * 1000000ull;
    dr64 = (double)total_rolling * 1000000ull;
    suffix_string(dh64, displayed_hashes, sizeof(displayed_hashes), 4);
    suffix_string(dr64, displayed_rolling, sizeof(displayed_rolling), 4);

    snprintf(statusline, sizeof(statusline),
        "%s(%ds):%s (avg):%sh/s | A:%.0f  R:%.0f  HW:%d  WU:%.1f/m  WUE:%.1f%%",
        want_per_device_stats ? "ALL " : "",
        opt_log_interval, displayed_rolling, displayed_hashes,
        total_diff_accepted, total_diff_rejected, hw_errors,
        total_diff1 / total_secs * 60,
        (total_diff1 / total_secs * 60)/(total_mhashes_done / total_secs * 100) * 10);

    local_mhashes_done = 0;
out_unlock:
    mutex_unlock(&hash_lock);

    if (showlog) {
        if (!curses_active) {
            printf("%s          \r", statusline);
            fflush(stdout);
        } else
            applog(LOG_INFO, "%s", statusline);
    }
}

static void stratum_share_result(json_t *val, json_t *res_val, json_t *err_val,
                 struct stratum_share *sshare)
{
    struct work *work = sshare->work;
    char hashshow[64];

    show_hash(work, hashshow);
    share_result(val, res_val, err_val, work, hashshow, false, "");
}

/* Parses stratum json responses and tries to find the id that the request
 * matched to and treat it accordingly. */
static bool parse_stratum_response(struct pool *pool, char *s)
{
    json_t *val = NULL, *err_val, *res_val, *id_val;
    struct stratum_share *sshare;
    json_error_t err;
    bool ret = false;
    int id;

    val = JSON_LOADS(s, &err);
    if (!val) {
        applog(LOG_INFO, "JSON decode failed(%d): %s", err.line, err.text);
        goto out;
    }

    res_val = json_object_get(val, "result");
    err_val = json_object_get(val, "error");
    id_val = json_object_get(val, "id");

    if (json_is_null(id_val) || !id_val) {
        char *ss;

        if (err_val)
            ss = json_dumps(err_val, JSON_INDENT(3));
        else
            ss = strdup("(unknown reason)");

        applog(LOG_INFO, "JSON-RPC non method decode failed: %s", ss);

        free(ss);

        goto out;
    }

    id = json_integer_value(id_val);

    mutex_lock(&sshare_lock);
    HASH_FIND_INT(stratum_shares, &id, sshare);
    if (sshare) {
        HASH_DEL(stratum_shares, sshare);
        pool->sshares--;
    }
    mutex_unlock(&sshare_lock);

    if (!sshare) {
        double pool_diff;

        /* Since the share is untracked, we can only guess at what the
         * work difficulty is based on the current pool diff. */
        cg_rlock(&pool->data_lock);
        pool_diff = pool->swork.diff;
        cg_runlock(&pool->data_lock);

        if (json_is_true(res_val)) {
            applog(LOG_NOTICE, "Accepted untracked stratum share from %s", pool->poolname);

            /* We don't know what device this came from so we can't
             * attribute the work to the relevant cgpu */
            mutex_lock(&stats_lock);
            total_accepted++;
            pool->accepted++;
            total_diff_accepted += pool_diff;
            pool->diff_accepted += pool_diff;
            mutex_unlock(&stats_lock);
        } else {
            applog(LOG_NOTICE, "Rejected untracked stratum share from %s", pool->poolname);

            mutex_lock(&stats_lock);
            total_rejected++;
            pool->rejected++;
            total_diff_rejected += pool_diff;
            pool->diff_rejected += pool_diff;
            mutex_unlock(&stats_lock);
        }
        goto out;
    }
    stratum_share_result(val, res_val, err_val, sshare);
    free_work(sshare->work);
    free(sshare);

    ret = true;
out:
    if (val)
        json_decref(val);

    return ret;
}

void clear_stratum_shares(struct pool *pool)
{
    struct stratum_share *sshare, *tmpshare;
    double diff_cleared = 0;
    int cleared = 0;

    mutex_lock(&sshare_lock);
    HASH_ITER(hh, stratum_shares, sshare, tmpshare) {
        if (sshare->work->pool == pool) {
            HASH_DEL(stratum_shares, sshare);
            diff_cleared += sshare->work->work_difficulty;
            free_work(sshare->work);
            pool->sshares--;
            free(sshare);
            cleared++;
        }
    }
    mutex_unlock(&sshare_lock);

    if (cleared) {
        applog(LOG_WARNING, "Lost %d shares due to stratum disconnect on %s", cleared, pool->poolname);
        pool->stale_shares += cleared;
        total_stale += cleared;
        pool->diff_stale += diff_cleared;
        total_diff_stale += diff_cleared;
    }
}

static void clear_pool_work(struct pool *pool)
{
    struct work *work, *tmp;
    int cleared = 0;

    mutex_lock(stgd_lock);
    HASH_ITER(hh, staged_work, work, tmp) {
        if (work->pool == pool) {
            HASH_DEL(staged_work, work);
            free_work(work);
            cleared++;
        }
    }
    mutex_unlock(stgd_lock);
}

static int cp_prio(void)
{
    int prio;

    cg_rlock(&control_lock);
    prio = currentpool->prio;
    cg_runlock(&control_lock);

    return prio;
}

/* We only need to maintain a secondary pool connection when we need the
 * capacity to get work from the backup pools while still on the primary */
static bool cnx_needed(struct pool *pool)
{
    struct pool *cp;

    if (pool->enabled != POOL_ENABLED)
        return false;

    /* Balance strategies need all pools online */
    if (pool_strategy == POOL_BALANCE)
        return true;
    if (pool_strategy == POOL_LOADBALANCE)
        return true;

    /* Idle stratum pool needs something to kick it alive again */
    if (pool->has_stratum && pool->idle)
        return true;

    /* Getwork pools without opt_fail_only need backup pools up to be able
     * to leak shares */
    cp = current_pool();
    if (cp == pool)
        return true;
    if (!pool_localgen(cp) && (!opt_fail_only || !cp->hdr_path))
        return true;
    /* If we're waiting for a response from shares submitted, keep the
     * connection open. */
    if (pool->sshares)
        return true;
    /* If the pool has only just come to life and is higher priority than
     * the current pool keep the connection open so we can fail back to
     * it. */
    if (pool_strategy == POOL_FAILOVER && pool->prio < cp_prio())
        return true;
    if (pool_unworkable(cp))
        return true;
    /* We've run out of work, bring anything back to life. */
    if (no_work)
        return true;
    return false;
}

static void wait_lpcurrent(struct pool *pool);
static void pool_resus(struct pool *pool);
static void gen_stratum_work(struct pool *pool, struct work *work);

static void stratum_resumed(struct pool *pool)
{
    if (!pool->stratum_notify)
        return;
    if (pool_tclear(pool, &pool->idle)) {
        applog(LOG_INFO, "Stratum connection to %s resumed", pool->poolname);
        pool_resus(pool);
    }
}

static bool supports_resume(struct pool *pool)
{
    bool ret;

    cg_rlock(&pool->data_lock);
    ret = (pool->sessionid != NULL);
    cg_runlock(&pool->data_lock);

    return ret;
}

/* One stratum receive thread per pool that has stratum waits on the socket
 * checking for new messages and for the integrity of the socket connection. We
 * reset the connection based on the integrity of the receive side only as the
 * send side will eventually expire data it fails to send. */
static void *stratum_rthread(void *userdata)
{
    struct pool *pool = (struct pool *)userdata;
    char threadname[16];

    pthread_detach(pthread_self());

    snprintf(threadname, 16, "StratumR/%d", pool->pool_no);
    RenameThread(threadname);

    while (42) {
        struct timeval timeout;
        int sel_ret;
        fd_set rd;
        char *s;

        if (unlikely(pool->removed))
            break;

        /* Check to see whether we need to maintain this connection
         * indefinitely or just bring it up when we switch to this
         * pool */
        if (!sock_full(pool) && !cnx_needed(pool)) {
            suspend_stratum(pool);
            clear_stratum_shares(pool);
            clear_pool_work(pool);

            wait_lpcurrent(pool);
            if (!restart_stratum(pool)) {
                pool_died(pool);
                while (!restart_stratum(pool)) {
                    if (pool->removed)
                        goto out;
                    cgsleep_ms(30000);
                }
            }
        }

        FD_ZERO(&rd);
        FD_SET(pool->sock, &rd);
        timeout.tv_sec = 90;
        timeout.tv_usec = 0;

        /* The protocol specifies that notify messages should be sent
         * every minute so if we fail to receive any for 90 seconds we
         * assume the connection has been dropped and treat this pool
         * as dead */
        if (!sock_full(pool) && (sel_ret = select(pool->sock + 1, &rd, NULL, NULL, &timeout)) < 1) {
            applog(LOG_DEBUG, "Stratum select failed on %s with value %d", pool->poolname, sel_ret);
            s = NULL;
        } else
            s = recv_line(pool);
        if (!s) {
            applog(LOG_NOTICE, "Stratum connection to %s interrupted", pool->poolname);
            pool->getfail_occasions++;
            pool->disconnect_occasions++;
            total_go++;

            /* If the socket to our stratum pool disconnects, all
             * tracked submitted shares are lost and we will leak
             * the memory if we don't discard their records. */
            if (!supports_resume(pool) || opt_lowmem)
                clear_stratum_shares(pool);
            clear_pool_work(pool);
            if (pool == current_pool())
                restart_threads();

            if (restart_stratum(pool))
                continue;

            pool_died(pool);
            while (!restart_stratum(pool)) {
                if (pool->removed)
                    goto out;
                cgsleep_ms(30000);
            }
            stratum_resumed(pool);
            continue;
        }

        /* Check this pool hasn't died while being a backup pool and
         * has not had its idle flag cleared */
        stratum_resumed(pool);

        if (!parse_method(pool, s) && !parse_stratum_response(pool, s))
            applog(LOG_INFO, "Unknown stratum msg: %s", s);
        free(s);
        if (pool->swork.clean) {
            struct work *work = make_work();

            /* Generate a single work item to update the current
             * block database */
            pool->swork.clean = false;
            gen_stratum_work(pool, work);
            work->longpoll = true;
            /* Return value doesn't matter. We're just informing
             * that we may need to restart. */
            test_work_current(work);
            free_work(work);
        }
    }

out:
    return NULL;
}

/* Each pool has one stratum send thread for sending shares to avoid many
 * threads being created for submission since all sends need to be serialised
 * anyway. */
static void *stratum_sthread(void *userdata)
{
    struct pool *pool = (struct pool *)userdata;
    char threadname[16];
#if defined(USE_HEAVY) || defined(USE_HEFTY)
    char* ntimehex;
    char ntimebuf[4];
#endif

    pthread_detach(pthread_self());

    snprintf(threadname, 16, "StratumS/%d", pool->pool_no);
    RenameThread(threadname);

    pool->stratum_q = tq_new();
    if (!pool->stratum_q)
        quit(1, "Failed to create stratum_q in stratum_sthread");

    while (42) {
        char noncehex[12], nonce2hex[20];
        struct stratum_share *sshare;
        uint32_t *hash32, nonce;
        char s[1024], nonce2[8];
        struct work *work;
        bool submitted;

        if (unlikely(pool->removed))
            break;

        work = tq_pop(pool->stratum_q, NULL);
        if (unlikely(!work))
            quit(1, "Stratum q returned empty work");

        if (unlikely(work->nonce2_len > 8)) {
            applog(LOG_ERR, "%s asking for inappropriately long nonce2 length %d", pool->poolname, (int)work->nonce2_len);
            applog(LOG_ERR, "Not attempting to submit shares");
            free_work(work);
            continue;
        }

        sshare = calloc(sizeof(struct stratum_share), 1);
        hash32 = (uint32_t *)work->hash;
        submitted = false;

        sshare->sshare_time = time(NULL);
        /* This work item is freed in parse_stratum_response */
        sshare->work = work;
        nonce = *((uint32_t *)(work->data + 76));
        if (opt_heavy || opt_hefty)
            nonce = swab32(nonce);
        __bin2hex(noncehex, (const unsigned char *)&nonce, 4);
        memset(s, 0, 1024);

        mutex_lock(&sshare_lock);
        /* Give the stratum share a unique id */
        sshare->id = swork_id++;
        mutex_unlock(&sshare_lock);

        memset(nonce2, 0, 8);
        /* We only use uint32_t sized nonce2 increments internally */
        memcpy(nonce2, &work->nonce2, sizeof(uint32_t));
        __bin2hex(nonce2hex, (const unsigned char *)nonce2, work->nonce2_len);

#if defined(USE_HEAVY) || defined(USE_HEFTY)
        if (opt_heavy || opt_hefty) {
            hex2bin(ntimebuf, work->ntime, 8);
            *((uint32_t*)ntimebuf) = swab32(*((uint32_t*)ntimebuf));
            ntimehex = bin2hex(ntimebuf, 4);
#ifdef USE_HEAVY
            if (opt_heavy) {
                snprintf(s, sizeof(s),
                    "{\"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\": %d, \"method\": \"mining.submit\"}",
                    pool->rpc_user, work->job_id, nonce2hex, ntimehex, noncehex, opt_vote_hex, sshare->id);
            }
#endif
#ifdef USE_HEFTY
            if (opt_hefty) {
                snprintf(s, sizeof(s),
                    "{\"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\": %d, \"method\": \"mining.submit\"}",
                    pool->rpc_user, work->job_id, nonce2hex, ntimehex, noncehex, sshare->id);
            }
#endif
            free(ntimehex);
        } else {
#endif
            snprintf(s, sizeof(s),
                "{\"params\": [\"%s\", \"%s\", \"%s\", \"%s\", \"%s\"], \"id\": %d, \"method\": \"mining.submit\"}",
                pool->rpc_user, work->job_id, nonce2hex, work->ntime, noncehex, sshare->id);
#if defined(USE_HEAVY) || defined(USE_HEFTY)
        }
#endif
        applog(LOG_INFO, "Submitting share %08lx to %s", (long unsigned int)htole32(hash32[6]), pool->poolname);

        /* Try resubmitting for up to 2 minutes if we fail to submit
         * once and the stratum pool nonce1 still matches suggesting
         * we may be able to resume. */
        while (time(NULL) < sshare->sshare_time + 120) {
            bool sessionid_match;

            if (likely(stratum_send(pool, s, strlen(s)))) {
                if (pool_tclear(pool, &pool->submit_fail))
                        applog(LOG_WARNING, "%s communication resumed, submitting work", pool->poolname);

                mutex_lock(&sshare_lock);
                HASH_ADD_INT(stratum_shares, id, sshare);
                pool->sshares++;
                mutex_unlock(&sshare_lock);

                applog(LOG_DEBUG, "Successfully submitted, adding to stratum_shares db");
                submitted = true;
                break;
            }
            if (!pool_tset(pool, &pool->submit_fail) && cnx_needed(pool)) {
                applog(LOG_WARNING, "%s stratum share submission failure", pool->poolname);
                total_ro++;
                pool->remotefail_occasions++;
            }

            if (opt_lowmem) {
                applog(LOG_DEBUG, "Lowmem option prevents resubmitting stratum share");
                break;
            }

            cg_rlock(&pool->data_lock);
            sessionid_match = (pool->nonce1 && !strcmp(work->nonce1, pool->nonce1));
            cg_runlock(&pool->data_lock);

            if (!sessionid_match) {
                applog(LOG_DEBUG, "No matching session id for resubmitting stratum share");
                break;
            }
            /* Retry every 5 seconds */
            sleep(5);
        }

        if (unlikely(!submitted)) {
            applog(LOG_DEBUG, "Failed to submit stratum share, discarding");
            free_work(work);
            free(sshare);
            pool->stale_shares++;
            total_stale++;
        }
    }

    /* Freeze the work queue but don't free up its memory in case there is
     * work still trying to be submitted to the removed pool. */
    tq_freeze(pool->stratum_q);

    return NULL;
}

static void init_stratum_threads(struct pool *pool)
{
    have_longpoll = true;

    if (unlikely(pthread_create(&pool->stratum_sthread, NULL, stratum_sthread, (void *)pool)))
        quit(1, "Failed to create stratum sthread");
    if (unlikely(pthread_create(&pool->stratum_rthread, NULL, stratum_rthread, (void *)pool)))
        quit(1, "Failed to create stratum rthread");
}

static void *longpoll_thread(void *userdata);

static bool stratum_works(struct pool *pool)
{
    applog(LOG_INFO, "Testing %s stratum %s", pool->poolname, pool->stratum_url);
    if (!extract_sockaddr(pool->stratum_url, &pool->sockaddr_url, &pool->stratum_port))
        return false;

    if (!initiate_stratum(pool))
        return false;

    return true;
}

static bool pool_active(struct pool *pool, bool pinging)
{
    struct timeval tv_getwork, tv_getwork_reply;
    bool ret = false;
    json_t *val;
    CURL *curl;
    int uninitialised_var(rolltime);

    if (pool->has_gbt)
        applog(LOG_DEBUG, "Retrieving block template from %s", pool->poolname);
    else
        applog(LOG_INFO, "Testing %s", pool->poolname);

    /* This is the central point we activate stratum when we can */
retry_stratum:
    if (pool->has_stratum) {
        /* We create the stratum thread for each pool just after
         * successful authorisation. Once the init flag has been set
         * we never unset it and the stratum thread is responsible for
         * setting/unsetting the active flag */
        bool init = pool_tset(pool, &pool->stratum_init);

        if (!init) {
            bool ret = initiate_stratum(pool) && auth_stratum(pool);

            if (ret)
                init_stratum_threads(pool);
            else
                pool_tclear(pool, &pool->stratum_init);
            return ret;
        }
        return pool->stratum_active;
    }

    curl = curl_easy_init();
    if (unlikely(!curl)) {
        applog(LOG_ERR, "CURL initialisation failed");
        return false;
    }

    /* Probe for GBT support on first pass */
    if (!pool->probed && !opt_fix_protocol) {
        applog(LOG_DEBUG, "Probing for GBT support");
        val = json_rpc_call(curl, pool->rpc_url, pool->rpc_userpass,
                    gbt_req, true, false, &rolltime, pool, false);
        if (val) {
            bool append = false, submit = false;
            json_t *res_val, *mutables;
            int i, mutsize = 0;

            res_val = json_object_get(val, "result");
            if (res_val) {
                mutables = json_object_get(res_val, "mutable");
                mutsize = json_array_size(mutables);
            }

            for (i = 0; i < mutsize; i++) {
                json_t *arrval = json_array_get(mutables, i);

                if (json_is_string(arrval)) {
                    const char *mutable = json_string_value(arrval);

                    if (!strncasecmp(mutable, "coinbase/append", 15))
                        append = true;
                    else if (!strncasecmp(mutable, "submit/coinbase", 15))
                        submit = true;
                }
            }
            json_decref(val);

            /* Only use GBT if it supports coinbase append and
             * submit coinbase */
            if (append && submit) {
                pool->has_gbt = true;
                pool->rpc_req = gbt_req;
            }
        }
        /* Reset this so we can probe fully just after this. It will be
         * set to true that time.*/
        pool->probed = false;

        if (pool->has_gbt)
            applog(LOG_DEBUG, "GBT coinbase + append support found, switching to GBT protocol");
        else
            applog(LOG_DEBUG, "No GBT coinbase + append support found, using getwork protocol");
    }

    cgtime(&tv_getwork);
    val = json_rpc_call(curl, pool->rpc_url, pool->rpc_userpass,
                pool->rpc_req, true, false, &rolltime, pool, false);
    cgtime(&tv_getwork_reply);

    /* Detect if a http getwork pool has an X-Stratum header at startup,
     * and if so, switch to that in preference to getwork if it works */
    if (pool->stratum_url && !opt_fix_protocol && stratum_works(pool)) {
        applog(LOG_NOTICE, "Switching %s to %s", pool->poolname, pool->stratum_url);
        if (!pool->rpc_url)
            pool->rpc_url = strdup(pool->stratum_url);
        pool->has_stratum = true;
        curl_easy_cleanup(curl);

        goto retry_stratum;
    }

    if (val) {
        struct work *work = make_work();
        bool rc;

        rc = work_decode(pool, work, val);
        if (rc) {
            applog(LOG_DEBUG, "Successfully retrieved and deciphered work from %s", pool->poolname);
            work->pool = pool;
            work->rolltime = rolltime;
            copy_time(&work->tv_getwork, &tv_getwork);
            copy_time(&work->tv_getwork_reply, &tv_getwork_reply);
            work->getwork_mode = GETWORK_MODE_TESTPOOL;
            calc_diff(work, 0);
            applog(LOG_DEBUG, "Pushing pooltest work to base pool");

            tq_push(control_thr[stage_thr_id].q, work);
            total_getworks++;
            pool->getwork_requested++;
            ret = true;
            cgtime(&pool->tv_idle);
        } else {
            applog(LOG_DEBUG, "Successfully retrieved but FAILED to decipher work from %s", pool->poolname);
            free_work(work);
        }
        json_decref(val);

        if (pool->lp_url)
            goto out;

        /* Decipher the longpoll URL, if any, and store it in ->lp_url */
        if (pool->hdr_path) {
            char *copy_start, *hdr_path;
            bool need_slash = false;
            size_t siz;

            hdr_path = pool->hdr_path;
            if (strstr(hdr_path, "://")) {
                pool->lp_url = hdr_path;
                hdr_path = NULL;
            } else {
                /* absolute path, on current server */
                copy_start = (*hdr_path == '/') ? (hdr_path + 1) : hdr_path;
                if (pool->rpc_url[strlen(pool->rpc_url) - 1] != '/')
                    need_slash = true;

                siz = strlen(pool->rpc_url) + strlen(copy_start) + 2;
                pool->lp_url = malloc(siz);
                if (!pool->lp_url) {
                    applog(LOG_ERR, "Malloc failure in pool_active");
                    return false;
                }

                snprintf(pool->lp_url, siz, "%s%s%s", pool->rpc_url, need_slash ? "/" : "", copy_start);
            }
        } else
            pool->lp_url = NULL;

        if (!pool->lp_started) {
            pool->lp_started = true;
            if (unlikely(pthread_create(&pool->longpoll_thread, NULL, longpoll_thread, (void *)pool)))
                quit(1, "Failed to create pool longpoll thread");
        }
    } else {
        /* If we failed to parse a getwork, this could be a stratum
         * url without the prefix stratum+tcp:// so let's check it */
        if (initiate_stratum(pool)) {
            pool->has_stratum = true;
            goto retry_stratum;
        }
        applog(LOG_DEBUG, "FAILED to retrieve work from %s", pool->poolname);
        if (!pinging)
            applog(LOG_WARNING, "%s slow/down or URL or credentials invalid", pool->poolname);
    }
out:
    curl_easy_cleanup(curl);
    return ret;
}

static void pool_resus(struct pool *pool)
{
    if (pool_strategy == POOL_FAILOVER && pool->prio < cp_prio())
        applog(LOG_WARNING, "%s alive, testing stability", pool->poolname);
    else
        applog(LOG_INFO, "%s alive", pool->poolname);
}

static struct work *hash_pop(void)
{
    struct work *work = NULL, *tmp;
    int hc, i;

    mutex_lock(stgd_lock);
    while (!HASH_COUNT(staged_work)) {
        struct timespec then;
        struct timeval now;
        int rc;

        cgtime(&now);
        then.tv_sec = now.tv_sec + 10;
        then.tv_nsec = now.tv_usec * 1000;
        pthread_cond_signal(&gws_cond);
        rc = pthread_cond_timedwait(&getq->cond, stgd_lock, &then);
        /* Check again for !no_work as multiple threads may be
            * waiting on this condition and another may set the
            * bool separately. */
        if (rc && !no_work) {
            no_work = true;
            applog(LOG_WARNING, "Waiting for work to be available from pools.");
#ifdef HAVE_ADL
            // Set all GPUs to idle (same as exit and disabled) state.
            applog(LOG_WARNING, "Setting GPUs to idle performance.");
            for(i = 0; i < nDevs; i++)
                adl_reset_device(i, true, false);
#endif

        }
    }

    if (no_work) {
        applog(LOG_WARNING, "Work available from pools, resuming.");
        no_work = false;
#ifdef HAVE_ADL
        applog(LOG_WARNING, "Setting GPUs back to maximum performance.");
        for(i = 0; i < nDevs; i++)
            adl_reset_device(i, false, false);
#endif
    }

    hc = HASH_COUNT(staged_work);
    /* Find clone work if possible, to allow masters to be reused */
    if (hc > staged_rollable) {
        HASH_ITER(hh, staged_work, work, tmp) {
            if (!work_rollable(work))
                break;
        }
    } else
        work = staged_work;
    HASH_DEL(staged_work, work);
    if (work_rollable(work))
        staged_rollable--;

    /* Signal the getwork scheduler to look for more work */
    pthread_cond_signal(&gws_cond);

    /* Signal hash_pop again in case there are mutliple hash_pop waiters */
    pthread_cond_signal(&getq->cond);
    mutex_unlock(stgd_lock);

    return work;
}

static void gen_hash(unsigned char *data, unsigned char *hash, int len)
{
    unsigned char hash1[32];

#if defined(USE_HEAVY) || defined(USE_HEFTY)
    if (opt_heavy || opt_hefty) {
        heavycoin_hash(data, len, hash);
    } else {
#endif
    sha256(data, len, hash1);
    sha256(hash1, 32, hash);
#if defined(USE_HEAVY) || defined(USE_HEFTY)
    }
#endif
}

void set_target(unsigned char *dest_target, double diff)
{
    unsigned char target[32];
    uint64_t *data64, h64;
    double d64, dcut64;

    if (unlikely(diff == 0.0)) {
        /* This shouldn't happen but best we check to prevent a crash */
        applog(LOG_ERR, "Diff zero passed to set_target");
        diff = 1.0;
    }

    d64 = truediffone;
    if (opt_scrypt)
        d64 *= (double)65536;
    else if (opt_keccak)
        d64 *= (double)256;
    d64 /= diff;

    dcut64 = d64 / bits192;
    h64 = dcut64;
    data64 = (uint64_t *)(target + 24);
    *data64 = htole64(h64);
    dcut64 = h64;
    dcut64 *= bits192;
    d64 -= dcut64;

    dcut64 = d64 / bits128;
    h64 = dcut64;
    data64 = (uint64_t *)(target + 16);
    *data64 = htole64(h64);
    dcut64 = h64;
    dcut64 *= bits128;
    d64 -= dcut64;

    dcut64 = d64 / bits64;
    h64 = dcut64;
    data64 = (uint64_t *)(target + 8);
    *data64 = htole64(h64);
    dcut64 = h64;
    dcut64 *= bits64;
    d64 -= dcut64;

    h64 = d64;
    data64 = (uint64_t *)(target);
    *data64 = htole64(h64);

    if (opt_debug) {
        char *htarget = bin2hex(target, 32);

        applog(LOG_DEBUG, "Generated target %s", htarget);
        free(htarget);
    }
    memcpy(dest_target, target, 32);
}

/* Generates stratum based work based on the most recent notify information
 * from the pool. This will keep generating work while a pool is down so we use
 * other means to detect when the pool has died in stratum_thread */
static void gen_stratum_work(struct pool *pool, struct work *work)
{
    unsigned char merkle_root[32], merkle_sha[64];
    uint32_t *data32, *swap32;
    int i;

    cg_wlock(&pool->data_lock);

    /* Update coinbase */
    memcpy(pool->coinbase + pool->nonce2_offset, &pool->nonce2, sizeof(uint32_t));
    work->nonce2 = pool->nonce2++;
    work->nonce2_len = pool->n2size;

    /* Downgrade to a read lock to read off the pool variables */
    cg_dwlock(&pool->data_lock);

    /* Generate merkle root */
    if (opt_keccak) {
        sha256(pool->coinbase, pool->swork.cb_len, merkle_root);
    } else {
        gen_hash(pool->coinbase, merkle_root, pool->swork.cb_len);
    }
    memcpy(merkle_sha, merkle_root, 32);
    for (i = 0; i < pool->swork.merkles; i++) {
        memcpy(merkle_sha + 32, pool->swork.merkle_bin[i], 32);
        gen_hash(merkle_sha, merkle_root, 64);
        memcpy(merkle_sha, merkle_root, 32);
    }
    data32 = (uint32_t *)merkle_sha;
    swap32 = (uint32_t *)merkle_root;
    flip32(swap32, data32);

    /* Copy the data template from header_bin */
    memcpy(work->data, pool->header_bin, 128);
    memcpy(work->data + pool->merkle_offset, merkle_root, 32);
#ifdef USE_HEAVY
    if (opt_heavy) {
       work->data[83] = opt_vote[0]; 
       work->data[82] = opt_vote[1]; 
       work->data[81] = pool->reward_bin[1]; 
       work->data[80] = pool->reward_bin[0]; 
    }
#endif

    /* Store the stratum work diff to check it still matches the pool's
     * stratum diff when submitting shares */
    work->sdiff = pool->swork.diff;

    /* Copy parameters required for share submission */
    work->job_id = strdup(pool->swork.job_id);
    work->nonce1 = strdup(pool->nonce1);
    work->ntime = strdup(pool->swork.ntime);
    cg_runlock(&pool->data_lock);

    if (opt_debug) {
        char *header, *merkle_hash;

        header = bin2hex(work->data, 128);
        merkle_hash = bin2hex((const unsigned char *)merkle_root, 32);
        applog(LOG_DEBUG, "Generated stratum merkle %s", merkle_hash);
        applog(LOG_DEBUG, "Generated stratum header %s", header);
        applog(LOG_DEBUG, "Work job_id %s nonce2 %d ntime %s", work->job_id, work->nonce2, work->ntime);
        free(header);
        free(merkle_hash);
    }

    calc_midstate(work);
    set_target(work->target, work->sdiff);

    local_work++;
    work->pool = pool;
    work->stratum = true;
    work->blk.nonce = 0;
    work->id = total_work++;
    work->longpoll = false;
    work->getwork_mode = GETWORK_MODE_STRATUM;
    work->work_block = work_block;
    /* Nominally allow a driver to ntime roll 60 seconds */
    work->drv_rolllimit = 60;
    calc_diff(work, work->sdiff);

    cgtime(&work->tv_staged);
}

struct work *get_work(struct thr_info *thr, const int thr_id)
{
    struct work *work = NULL;

    thread_reportout(thr);
    applog(LOG_DEBUG, "Popping work from get queue to get work");
    while (!work) {
        work = hash_pop();
        if (stale_work(work, false)) {
            discard_work(work);
            work = NULL;
            wake_gws();
        }
    }
    applog(LOG_DEBUG, "Got work from get queue to get work for thread %d", thr_id);

    work->thr_id = thr_id;
    thread_reportin(thr);
    work->mined = true;
    work->device_diff = MIN(thr->cgpu->drv->max_diff, work->work_difficulty);
    return work;
}

/* Submit a copy of the tested, statistic recorded work item asynchronously */
static void submit_work_async(struct work *work)
{
    struct pool *pool = work->pool;
    pthread_t submit_thread;

    cgtime(&work->tv_work_found);

    if (stale_work(work, true)) {
        if (opt_submit_stale)
            applog(LOG_NOTICE, "%s stale share detected, submitting as user requested", pool->poolname);
        else if (pool->submit_old)
            applog(LOG_NOTICE, "%s stale share detected, submitting as pool requested", pool->poolname);
        else {
            applog(LOG_NOTICE, "%s stale share detected, discarding", pool->poolname);
            sharelog("discard", work);

            mutex_lock(&stats_lock);
            total_stale++;
            pool->stale_shares++;
            total_diff_stale += work->work_difficulty;
            pool->diff_stale += work->work_difficulty;
            mutex_unlock(&stats_lock);

            free_work(work);
            return;
        }
        work->stale = true;
    }

    if (work->stratum) {
        applog(LOG_DEBUG, "Pushing %s work to stratum queue", pool->poolname);
        if (unlikely(!tq_push(pool->stratum_q, work))) {
            applog(LOG_DEBUG, "Discarding work from removed pool");
            free_work(work);
        }
    } else {
        applog(LOG_DEBUG, "Pushing submit work to work thread");
        if (unlikely(pthread_create(&submit_thread, NULL, submit_work_thread, (void *)work)))
            quit(1, "Failed to create submit_work_thread");
    }
}

void inc_hw_errors(struct thr_info *thr)
{
    applog(LOG_INFO, "%s%d: invalid nonce - HW error", thr->cgpu->drv->name,
           thr->cgpu->device_id);

    mutex_lock(&stats_lock);
    hw_errors++;
    thr->cgpu->hw_errors++;
    mutex_unlock(&stats_lock);

    thr->cgpu->drv->hw_error(thr);
}

/* Fills in the work nonce and builds the output data in work->hash */
static void rebuild_nonce(struct work *work, uint32_t nonce)
{
    uint32_t *work_nonce = (uint32_t *)(work->data + 64 + 12);

    *work_nonce = htole32(nonce);

    rebuild_hash(work);
}

/* For testing a nonce against diff 1 */
bool test_nonce(struct work *work, uint32_t nonce)
{
    uint32_t *hash_32 = (uint32_t *)(work->hash + 28);
    uint32_t diff1targ;
    rebuild_nonce(work, nonce);
    diff1targ = (opt_scrypt || opt_heavy || opt_hefty) ? 0x0000ffffUL : ((opt_keccak || opt_skein) ? 0x000000ffUL : 0);
    if (le32toh(*hash_32) > diff1targ) {
        applog(LOG_DEBUG, "Invalid nonce %08x hash %08x", nonce, le32toh(*hash_32));
        return false;
    }
    return true;
//    return le32toh(*hash_32) <= diff1targ;
}

/* For testing a nonce against an arbitrary diff */
bool test_nonce_diff(struct work *work, uint32_t nonce, double diff)
{
    uint64_t *hash64 = (uint64_t *)(work->hash + 24), diff64;

    rebuild_nonce(work, nonce);
    diff64 = opt_scrypt ? 0x0000ffff00000000ULL : 0x00000000ffff0000ULL;
    diff64 /= diff;

    return (le64toh(*hash64) <= diff64);
}

static void update_work_stats(struct thr_info *thr, struct work *work)
{
    double test_diff = current_diff;

    work->share_diff = share_diff(work);

    if (opt_scrypt)
        test_diff *= 65536;

    if (unlikely(work->share_diff >= test_diff)) {
        work->block = true;
        work->pool->solved++;
        found_blocks++;
        work->mandatory = true;
        applog(LOG_NOTICE, "Found block for %s!", work->pool->poolname);
    }

    mutex_lock(&stats_lock);
    total_diff1 += work->device_diff;
    thr->cgpu->diff1 += work->device_diff;
    work->pool->diff1 += work->device_diff;
    thr->cgpu->last_device_valid_work = time(NULL);
    mutex_unlock(&stats_lock);
}

/* To be used once the work has been tested to be meet diff1 and has had its
 * nonce adjusted. */
void submit_tested_work(struct thr_info *thr, struct work *work)
{
    struct work *work_out;
    update_work_stats(thr, work);

    if (!fulltest(work->hash, work->target)) {
        applog(LOG_INFO, "Share above target");
        return;
    }
    work_out = copy_work(work);
    submit_work_async(work_out);
}

/* Returns true if nonce for work was a valid share */
bool submit_nonce(struct thr_info *thr, struct work *work, uint32_t nonce)
{
    if (test_nonce(work, nonce))
        submit_tested_work(thr, work);
    else {
        inc_hw_errors(thr);
        return false;
    }

    return true;
}

/* Allows drivers to submit work items where the driver has changed the ntime
 * value by noffset. Must be only used with a work protocol that does not ntime
 * roll itself intrinsically to generate work (eg stratum). We do not touch
 * the original work struct, but the copy of it only. */
bool submit_noffset_nonce(struct thr_info *thr, struct work *work_in, uint32_t nonce,
              int noffset)
{
    struct work *work = make_work();
    bool ret = false;

    _copy_work(work, work_in, noffset);
    if (!test_nonce(work, nonce)) {
        inc_hw_errors(thr);
        goto out;
    }
    ret = true;
    update_work_stats(thr, work);
    if (!fulltest(work->hash, work->target)) {
        applog(LOG_INFO, "Share above target");
        goto  out;
    }
    submit_work_async(work);

out:
    if (!ret)
        free_work(work);
    return ret;
}

static inline bool abandon_work(struct work *work, struct timeval *wdiff, uint64_t hashes)
{
    if (wdiff->tv_sec > opt_scantime ||
        work->blk.nonce >= MAXTHREADS - hashes ||
        hashes >= 0xfffffffe ||
        stale_work(work, false))
        return true;
    return false;
}

static void mt_disable(struct thr_info *mythr, const int thr_id,
               struct device_drv *drv)
{
    applog(LOG_WARNING, "Thread %d being disabled", thr_id);
    mythr->rolling = mythr->cgpu->rolling = 0;
    applog(LOG_DEBUG, "Waiting on sem in miner thread");
    cgsem_wait(&mythr->sem);
    applog(LOG_WARNING, "Thread %d being re-enabled", thr_id);
    drv->thread_enable(mythr);
}

/* The main hashing loop for devices that are slow enough to work on one work
 * item at a time, without a queue, aborting work before the entire nonce
 * range has been hashed if needed. */
static void hash_sole_work(struct thr_info *mythr)
{
    const int thr_id = mythr->id;
    struct cgpu_info *cgpu = mythr->cgpu;
    struct device_drv *drv = cgpu->drv;
    struct timeval getwork_start, tv_start, *tv_end, tv_workstart, tv_lastupdate;
    struct cgminer_stats *dev_stats = &(cgpu->cgminer_stats);
    struct cgminer_stats *pool_stats;
    /* Try to cycle approximately 5 times before each log update */
    const long cycle = opt_log_interval / 5 ? : 1;
    const bool primary = (!mythr->device_thread) || mythr->primary_thread;
    struct timeval diff, sdiff, wdiff = {0, 0};
    uint32_t max_nonce = drv->can_limit_work(mythr);
    int64_t hashes_done = 0;

    tv_end = &getwork_start;
    cgtime(&getwork_start);
    sdiff.tv_sec = sdiff.tv_usec = 0;
    cgtime(&tv_lastupdate);

    while (likely(!cgpu->shutdown)) {
        struct work *work = get_work(mythr, thr_id);
        int64_t hashes;

        mythr->work_restart = false;
        cgpu->new_work = true;

        cgtime(&tv_workstart);
        work->blk.nonce = 0;
        cgpu->max_hashes = 0;
        if (!drv->prepare_work(mythr, work)) {
            applog(LOG_ERR, "work prepare failed, exiting "
                "mining thread %d", thr_id);
            break;
        }
        work->device_diff = MIN(drv->working_diff, work->work_difficulty);
#ifdef USE_SCRYPT
        /* Dynamically adjust the working diff even if the target
         * diff is very high to ensure we can still validate scrypt is
         * returning shares. */
        if (opt_scrypt) {
            double wu;

            wu = total_diff1 / total_secs * 60;
            if (wu > 30 && drv->working_diff < drv->max_diff &&
                drv->working_diff < work->work_difficulty) {
                drv->working_diff++;
                applog(LOG_DEBUG, "Driver %s working diff changed to %.0f",
                    drv->dname, drv->working_diff);
                work->device_diff = MIN(drv->working_diff, work->work_difficulty);
            } else if (drv->working_diff > work->work_difficulty)
                drv->working_diff = work->work_difficulty;
            set_target(work->device_target, work->device_diff);
        }
#endif

        do {
            cgtime(&tv_start);

            subtime(&tv_start, &getwork_start);

            addtime(&getwork_start, &dev_stats->getwork_wait);
            if (time_more(&getwork_start, &dev_stats->getwork_wait_max))
                copy_time(&dev_stats->getwork_wait_max, &getwork_start);
            if (time_less(&getwork_start, &dev_stats->getwork_wait_min))
                copy_time(&dev_stats->getwork_wait_min, &getwork_start);
            dev_stats->getwork_calls++;

            pool_stats = &(work->pool->cgminer_stats);

            addtime(&getwork_start, &pool_stats->getwork_wait);
            if (time_more(&getwork_start, &pool_stats->getwork_wait_max))
                copy_time(&pool_stats->getwork_wait_max, &getwork_start);
            if (time_less(&getwork_start, &pool_stats->getwork_wait_min))
                copy_time(&pool_stats->getwork_wait_min, &getwork_start);
            pool_stats->getwork_calls++;

            cgtime(&(work->tv_work_start));

            /* Only allow the mining thread to be cancelled when
             * it is not in the driver code. */
            pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);

            thread_reportin(mythr);
            hashes = drv->scanhash(mythr, work, work->blk.nonce + max_nonce);
            thread_reportout(mythr);

            pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
            pthread_testcancel();

            /* tv_end is == &getwork_start */
            cgtime(&getwork_start);

            if (unlikely(hashes == -1)) {
                applog(LOG_ERR, "%s %d failure, disabling!", drv->name, cgpu->device_id);
                cgpu->deven = DEV_DISABLED;
                dev_error(cgpu, REASON_THREAD_ZERO_HASH);
                cgpu->shutdown = true;
                break;
            }

            hashes_done += hashes;
            if (hashes > cgpu->max_hashes)
                cgpu->max_hashes = hashes;

            timersub(tv_end, &tv_start, &diff);
            sdiff.tv_sec += diff.tv_sec;
            sdiff.tv_usec += diff.tv_usec;
            if (sdiff.tv_usec > 1000000) {
                ++sdiff.tv_sec;
                sdiff.tv_usec -= 1000000;
            }

            timersub(tv_end, &tv_workstart, &wdiff);

            if (unlikely((long)sdiff.tv_sec < cycle)) {
                int mult;

                if (likely(max_nonce == 0xffffffff))
                    continue;

                mult = 1000000 / ((sdiff.tv_usec + 0x400) / 0x400) + 0x10;
                mult *= cycle;
                if (max_nonce > (0xffffffff * 0x400) / mult)
                    max_nonce = 0xffffffff;
                else
                    max_nonce = (max_nonce * mult) / 0x400;
            } else if (unlikely(sdiff.tv_sec > cycle))
                max_nonce = max_nonce * cycle / sdiff.tv_sec;
            else if (unlikely(sdiff.tv_usec > 100000))
                max_nonce = max_nonce * 0x400 / (((cycle * 1000000) + sdiff.tv_usec) / (cycle * 1000000 / 0x400));

            timersub(tv_end, &tv_lastupdate, &diff);
            /* Update the hashmeter at most 5 times per second */
            if ((hashes_done && (diff.tv_sec > 0 || diff.tv_usec > 200000)) ||
                diff.tv_sec >= opt_log_interval) {
                hashmeter(thr_id, &diff, hashes_done);
                hashes_done = 0;
                copy_time(&tv_lastupdate, tv_end);
            }

            if (unlikely(mythr->work_restart)) {
                /* Apart from device_thread 0, we stagger the
                 * starting of every next thread to try and get
                 * all devices busy before worrying about
                 * getting work for their extra threads */
                if (!primary) {
                    struct timespec rgtp;

                    rgtp.tv_sec = 0;
                    rgtp.tv_nsec = 250 * mythr->device_thread * 1000000;
                    nanosleep(&rgtp, NULL);
                }
                break;
            }

            if (unlikely(mythr->pause || cgpu->deven != DEV_ENABLED))
                mt_disable(mythr, thr_id, drv);

            sdiff.tv_sec = sdiff.tv_usec = 0;
        } while (!abandon_work(work, &wdiff, cgpu->max_hashes));
        free_work(work);
    }
    cgpu->deven = DEV_DISABLED;
}

/* Put a new unqueued work item in cgpu->unqueued_work under cgpu->qlock till
 * the driver tells us it's full so that it may extract the work item using
 * the get_queued() function which adds it to the hashtable on
 * cgpu->queued_work. */
static void fill_queue(struct thr_info *mythr, struct cgpu_info *cgpu, struct device_drv *drv, const int thr_id)
{
    do {
        bool need_work;

        /* Do this lockless just to know if we need more unqueued work. */
        need_work = (!cgpu->unqueued_work);

        /* get_work is a blocking function so do it outside of lock
         * to prevent deadlocks with other locks. */
        if (need_work) {
            struct work *work = get_work(mythr, thr_id);

            wr_lock(&cgpu->qlock);
            /* Check we haven't grabbed work somehow between
             * checking and picking up the lock. */
            if (likely(!cgpu->unqueued_work))
                cgpu->unqueued_work = work;
            else
                need_work = false;
            wr_unlock(&cgpu->qlock);

            if (unlikely(!need_work))
                discard_work(work);
        }
        /* The queue_full function should be used by the driver to
         * actually place work items on the physical device if it
         * does have a queue. */
    } while (!drv->queue_full(cgpu));
}

/* This function is for retrieving one work item from the unqueued pointer and
 * adding it to the hashtable of queued work. Code using this function must be
 * able to handle NULL as a return which implies there is no work available. */
struct work *get_queued(struct cgpu_info *cgpu)
{
    struct work *work = NULL;

    wr_lock(&cgpu->qlock);
    if (cgpu->unqueued_work) {
        work = cgpu->unqueued_work;
        HASH_ADD_INT(cgpu->queued_work, id, work);
        cgpu->unqueued_work = NULL;
    }
    wr_unlock(&cgpu->qlock);

    return work;
}

/* This function is for finding an already queued work item in the
 * given que hashtable. Code using this function must be able
 * to handle NULL as a return which implies there is no matching work.
 * The calling function must lock access to the que if it is required.
 * The common values for midstatelen, offset, datalen are 32, 64, 12 */
struct work *__find_work_bymidstate(struct work *que, char *midstate, size_t midstatelen, char *data, int offset, size_t datalen)
{
    struct work *work, *tmp, *ret = NULL;

    HASH_ITER(hh, que, work, tmp) {
        if (memcmp(work->midstate, midstate, midstatelen) == 0 &&
            memcmp(work->data + offset, data, datalen) == 0) {
            ret = work;
            break;
        }
    }

    return ret;
}

/* This function is for finding an already queued work item in the
 * device's queued_work hashtable. Code using this function must be able
 * to handle NULL as a return which implies there is no matching work.
 * The common values for midstatelen, offset, datalen are 32, 64, 12 */
struct work *find_queued_work_bymidstate(struct cgpu_info *cgpu, char *midstate, size_t midstatelen, char *data, int offset, size_t datalen)
{
    struct work *ret;

    rd_lock(&cgpu->qlock);
    ret = __find_work_bymidstate(cgpu->queued_work, midstate, midstatelen, data, offset, datalen);
    rd_unlock(&cgpu->qlock);

    return ret;
}

struct work *clone_queued_work_bymidstate(struct cgpu_info *cgpu, char *midstate, size_t midstatelen, char *data, int offset, size_t datalen)
{
    struct work *work, *ret = NULL;

    rd_lock(&cgpu->qlock);
    work = __find_work_bymidstate(cgpu->queued_work, midstate, midstatelen, data, offset, datalen);
    if (work)
        ret = copy_work(work);
    rd_unlock(&cgpu->qlock);

    return ret;
}

void __work_completed(struct cgpu_info *cgpu, struct work *work)
{
    cgpu->queued_count--;
    HASH_DEL(cgpu->queued_work, work);
}
/* This function should be used by queued device drivers when they're sure
 * the work struct is no longer in use. */
void work_completed(struct cgpu_info *cgpu, struct work *work)
{
    wr_lock(&cgpu->qlock);
    __work_completed(cgpu, work);
    wr_unlock(&cgpu->qlock);

    free_work(work);
}

/* Combines find_queued_work_bymidstate and work_completed in one function
 * withOUT destroying the work so the driver must free it. */
struct work *take_queued_work_bymidstate(struct cgpu_info *cgpu, char *midstate, size_t midstatelen, char *data, int offset, size_t datalen)
{
    struct work *work;

    wr_lock(&cgpu->qlock);
    work = __find_work_bymidstate(cgpu->queued_work, midstate, midstatelen, data, offset, datalen);
    if (work)
        __work_completed(cgpu, work);
    wr_unlock(&cgpu->qlock);

    return work;
}

static void flush_queue(struct cgpu_info *cgpu)
{
    struct work *work = NULL;

    if (unlikely(!cgpu))
        return;

    /* Use only a trylock in case we get into a deadlock with a queueing
     * function holding the read lock when we're called. */
    if (wr_trylock(&cgpu->qlock))
        return;
    work = cgpu->unqueued_work;
    cgpu->unqueued_work = NULL;
    wr_unlock(&cgpu->qlock);

    if (work) {
        free_work(work);
        applog(LOG_DEBUG, "Discarded queued work item");
    }
}

/* This version of hash work is for devices that are fast enough to always
 * perform a full nonce range and need a queue to maintain the device busy.
 * Work creation and destruction is not done from within this function
 * directly. */
void hash_queued_work(struct thr_info *mythr)
{
    struct timeval tv_start = {0, 0}, tv_end;
    struct cgpu_info *cgpu = mythr->cgpu;
    struct device_drv *drv = cgpu->drv;
    const int thr_id = mythr->id;
    int64_t hashes_done = 0;

    while (likely(!cgpu->shutdown)) {
        struct timeval diff;
        int64_t hashes;

        mythr->work_restart = mythr->work_update = false;

        fill_queue(mythr, cgpu, drv, thr_id);

        hashes = drv->scanwork(mythr);

        if (unlikely(hashes == -1 )) {
            applog(LOG_ERR, "%s %d failure, disabling!", drv->name, cgpu->device_id);
            cgpu->deven = DEV_DISABLED;
            dev_error(cgpu, REASON_THREAD_ZERO_HASH);
            mt_disable(mythr, thr_id, drv);
        }

        hashes_done += hashes;
        cgtime(&tv_end);
        timersub(&tv_end, &tv_start, &diff);
        /* Update the hashmeter at most 5 times per second */
        if ((hashes_done && (diff.tv_sec > 0 || diff.tv_usec > 200000)) ||
            diff.tv_sec >= opt_log_interval) {
            hashmeter(thr_id, &diff, hashes_done);
            hashes_done = 0;
            copy_time(&tv_start, &tv_end);
        }

        if (unlikely(mythr->pause || cgpu->deven != DEV_ENABLED))
            mt_disable(mythr, thr_id, drv);

        if (mythr->work_update)
            drv->update_work(cgpu);
    }
    cgpu->deven = DEV_DISABLED;
}

/* This version of hash_work is for devices drivers that want to do their own
 * work management entirely, usually by using get_work(). Note that get_work
 * is a blocking function and will wait indefinitely if no work is available
 * so this must be taken into consideration in the driver. */
void hash_driver_work(struct thr_info *mythr)
{
    struct timeval tv_start = {0, 0}, tv_end;
    struct cgpu_info *cgpu = mythr->cgpu;
    struct device_drv *drv = cgpu->drv;
    const int thr_id = mythr->id;
    int64_t hashes_done = 0;

    while (likely(!cgpu->shutdown)) {
        struct timeval diff;
        int64_t hashes;

        mythr->work_restart = mythr->work_update = false;

        hashes = drv->scanwork(mythr);

        if (unlikely(hashes == -1 )) {
            applog(LOG_ERR, "%s %d failure, disabling!", drv->name, cgpu->device_id);
            cgpu->deven = DEV_DISABLED;
            dev_error(cgpu, REASON_THREAD_ZERO_HASH);
            mt_disable(mythr, thr_id, drv);
        }

        hashes_done += hashes;
        cgtime(&tv_end);
        timersub(&tv_end, &tv_start, &diff);
        /* Update the hashmeter at most 5 times per second */
        if ((hashes_done && (diff.tv_sec > 0 || diff.tv_usec > 200000)) ||
            diff.tv_sec >= opt_log_interval) {
            hashmeter(thr_id, &diff, hashes_done);
            hashes_done = 0;
            copy_time(&tv_start, &tv_end);
        }

        if (unlikely(mythr->pause || cgpu->deven != DEV_ENABLED))
            mt_disable(mythr, thr_id, drv);

        if (mythr->work_update)
            drv->update_work(cgpu);
    }
    cgpu->deven = DEV_DISABLED;
}

void *miner_thread(void *userdata)
{
    struct thr_info *mythr = userdata;
    const int thr_id = mythr->id;
    struct cgpu_info *cgpu = mythr->cgpu;
    struct device_drv *drv = cgpu->drv;
    char threadname[24];

        snprintf(threadname, 24, "miner/%d", thr_id);
    RenameThread(threadname);

    thread_reportout(mythr);
    if (!drv->thread_init(mythr)) {
        dev_error(cgpu, REASON_THREAD_FAIL_INIT);
        goto out;
    }

    applog(LOG_DEBUG, "Waiting on sem in miner thread");
    cgsem_wait(&mythr->sem);

    drv->hash_work(mythr);
out:
    drv->thread_shutdown(mythr);

    return NULL;
}

enum {
    STAT_SLEEP_INTERVAL     = 1,
    STAT_CTR_INTERVAL       = 10000000,
    FAILURE_INTERVAL        = 30,
};

#ifdef HAVE_LIBCURL
/* Stage another work item from the work returned in a longpoll */
static void convert_to_work(json_t *val, int rolltime, struct pool *pool, struct timeval *tv_lp, struct timeval *tv_lp_reply)
{
    struct work *work;
    bool rc;

    work = make_work();

    rc = work_decode(pool, work, val);
    if (unlikely(!rc)) {
        applog(LOG_ERR, "Could not convert longpoll data to work");
        free_work(work);
        return;
    }
    total_getworks++;
    pool->getwork_requested++;
    work->pool = pool;
    work->rolltime = rolltime;
    copy_time(&work->tv_getwork, tv_lp);
    copy_time(&work->tv_getwork_reply, tv_lp_reply);
    calc_diff(work, 0);

    if (pool->enabled == POOL_REJECTING)
        work->mandatory = true;

    if (pool->has_gbt)
        gen_gbt_work(pool, work);
    work->longpoll = true;
    work->getwork_mode = GETWORK_MODE_LP;

    /* We'll be checking this work item twice, but we already know it's
     * from a new block so explicitly force the new block detection now
     * rather than waiting for it to hit the stage thread. This also
     * allows testwork to know whether LP discovered the block or not. */
    test_work_current(work);

    /* Don't use backup LPs as work if we have failover-only enabled. Use
     * the longpoll work from a pool that has been rejecting shares as a
     * way to detect when the pool has recovered.
     */
    if (pool != current_pool() && opt_fail_only && pool->enabled != POOL_REJECTING) {
        free_work(work);
        return;
    }

    work = clone_work(work);

    applog(LOG_DEBUG, "Pushing converted work to stage thread");

    stage_work(work);
    applog(LOG_DEBUG, "Converted longpoll data to work");
}

/* If we want longpoll, enable it for the chosen default pool, or, if
 * the pool does not support longpoll, find the first one that does
 * and use its longpoll support */
static struct pool *select_longpoll_pool(struct pool *cp)
{
    int i;

    if (cp->hdr_path || cp->has_gbt)
        return cp;
    for (i = 0; i < total_pools; i++) {
        struct pool *pool = pools[i];

        if (pool->has_stratum || pool->hdr_path)
            return pool;
    }
    return NULL;
}
#endif /* HAVE_LIBCURL */

/* This will make the longpoll thread wait till it's the current pool, or it
 * has been flagged as rejecting, before attempting to open any connections.
 */
static void wait_lpcurrent(struct pool *pool)
{
    while (!cnx_needed(pool) && (pool->enabled == POOL_DISABLED ||
           (pool != current_pool() && pool_strategy != POOL_LOADBALANCE &&
           pool_strategy != POOL_BALANCE))) {
        mutex_lock(&lp_lock);
        pthread_cond_wait(&lp_cond, &lp_lock);
        mutex_unlock(&lp_lock);
    }
}

#ifdef HAVE_LIBCURL
static void *longpoll_thread(void *userdata)
{
    struct pool *cp = (struct pool *)userdata;
    /* This *pool is the source of the actual longpoll, not the pool we've
     * tied it to */
    struct timeval start, reply, end;
    struct pool *pool = NULL;
    char threadname[16];
    CURL *curl = NULL;
    int failures = 0;
    char lpreq[1024];
    char *lp_url;
    int rolltime;

    snprintf(threadname, 16, "longpoll/%d", cp->pool_no);
    RenameThread(threadname);

    curl = curl_easy_init();
    if (unlikely(!curl)) {
        applog(LOG_ERR, "CURL initialisation failed");
        return NULL;
    }

retry_pool:
    pool = select_longpoll_pool(cp);
    if (!pool) {
        applog(LOG_WARNING, "No suitable long-poll found for %s", cp->rpc_url);
        while (!pool) {
            cgsleep_ms(60000);
            pool = select_longpoll_pool(cp);
        }
    }

    if (pool->has_stratum) {
        applog(LOG_WARNING, "Block change for %s detection via %s stratum",
               cp->rpc_url, pool->rpc_url);
        goto out;
    }

    /* Any longpoll from any pool is enough for this to be true */
    have_longpoll = true;

    wait_lpcurrent(cp);

    if (pool->has_gbt) {
        lp_url = pool->rpc_url;
        applog(LOG_WARNING, "GBT longpoll ID activated for %s", lp_url);
    } else {
        strcpy(lpreq, getwork_req);

        lp_url = pool->lp_url;
        if (cp == pool)
            applog(LOG_WARNING, "Long-polling activated for %s", lp_url);
        else
            applog(LOG_WARNING, "Long-polling activated for %s via %s", cp->rpc_url, lp_url);
    }

    while (42) {
        json_t *val, *soval;

        wait_lpcurrent(cp);

        cgtime(&start);

        /* Update the longpollid every time, but do it under lock to
         * avoid races */
        if (pool->has_gbt) {
            cg_rlock(&pool->gbt_lock);
            snprintf(lpreq, sizeof(lpreq),
                "{\"id\": 0, \"method\": \"getblocktemplate\", \"params\": "
                "[{\"capabilities\": [\"coinbasetxn\", \"workid\", \"coinbase/append\"], "
                "\"longpollid\": \"%s\"}]}\n", pool->longpollid);
            cg_runlock(&pool->gbt_lock);
        }

        /* Longpoll connections can be persistent for a very long time
         * and any number of issues could have come up in the meantime
         * so always establish a fresh connection instead of relying on
         * a persistent one. */
        curl_easy_setopt(curl, CURLOPT_FRESH_CONNECT, 1);
        val = json_rpc_call(curl, lp_url, pool->rpc_userpass,
                    lpreq, false, true, &rolltime, pool, false);

        cgtime(&reply);

        if (likely(val)) {
            soval = json_object_get(json_object_get(val, "result"), "submitold");
            if (soval)
                pool->submit_old = json_is_true(soval);
            else
                pool->submit_old = false;
            convert_to_work(val, rolltime, pool, &start, &reply);
            failures = 0;
            json_decref(val);
        } else {
            /* Some pools regularly drop the longpoll request so
             * only see this as longpoll failure if it happens
             * immediately and just restart it the rest of the
             * time. */
            cgtime(&end);
            if (end.tv_sec - start.tv_sec > 30)
                continue;
            if (failures == 1)
                applog(LOG_WARNING, "longpoll failed for %s, retrying every 30s", lp_url);
            cgsleep_ms(30000);
        }

        if (pool != cp) {
            pool = select_longpoll_pool(cp);
            if (pool->has_stratum) {
                applog(LOG_WARNING, "Block change for %s detection via %s stratum",
                       cp->rpc_url, pool->rpc_url);
                break;
            }
            if (unlikely(!pool))
                goto retry_pool;
        }

        if (unlikely(pool->removed))
            break;
    }

out:
    curl_easy_cleanup(curl);

    return NULL;
}
#else /* HAVE_LIBCURL */
static void *longpoll_thread(void __maybe_unused *userdata)
{
    pthread_detach(pthread_self());
    return NULL;
}
#endif /* HAVE_LIBCURL */

void reinit_device(struct cgpu_info *cgpu)
{
    cgpu->drv->reinit_device(cgpu);
}

static struct timeval rotate_tv;

/* We reap curls if they are unused for over a minute */
static void reap_curl(struct pool *pool)
{
    struct curl_ent *ent, *iter;
    struct timeval now;
    int reaped = 0;

    cgtime(&now);

    mutex_lock(&pool->pool_lock);
    list_for_each_entry_safe(ent, iter, &pool->curlring, node) {
        if (pool->curls < 2)
            break;
        if (now.tv_sec - ent->tv.tv_sec > 300) {
            reaped++;
            pool->curls--;
            list_del(&ent->node);
            curl_easy_cleanup(ent->curl);
            free(ent);
        }
    }
    mutex_unlock(&pool->pool_lock);

    if (reaped)
        applog(LOG_DEBUG, "Reaped %d curl%s from %s", reaped, reaped > 1 ? "s" : "", pool->poolname);
}

static void *watchpool_thread(void __maybe_unused *userdata)
{
    int intervals = 0;

    pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

    RenameThread("watchpool");

    while (42) {
        struct timeval now;
        int i;

        if (++intervals > 20)
            intervals = 0;
        cgtime(&now);

        for (i = 0; i < total_pools; i++) {
            struct pool *pool = pools[i];

            if (!opt_benchmark)
                reap_curl(pool);

            /* Get a rolling utility per pool over 10 mins */
            if (intervals > 19) {
                int shares = pool->diff1 - pool->last_shares;

                pool->last_shares = pool->diff1;
                pool->utility = (pool->utility + (double)shares * 0.63) / 1.63;
                pool->shares = pool->utility;
            }

            if (pool->enabled == POOL_DISABLED)
                continue;

            /* Don't start testing any pools if the test threads
             * from startup are still doing their first attempt. */
            if (unlikely(pool->testing)) {
                pthread_join(pool->test_thread, NULL);
                pool->testing = false;
            }

            /* Test pool is idle once every minute */
            if (pool->idle && now.tv_sec - pool->tv_idle.tv_sec > 30) {
                cgtime(&pool->tv_idle);
                if (pool_active(pool, true) && pool_tclear(pool, &pool->idle))
                    pool_resus(pool);
            }

            /* Only switch pools if the failback pool has been
             * alive for more than 60 seconds (default) to prevent
             * intermittently failing pools from being used. */
            if (!pool->idle && pool_strategy == POOL_FAILOVER && pool->prio < cp_prio() &&
                now.tv_sec - pool->tv_idle.tv_sec > opt_fail_switch_delay) {
                applog(LOG_WARNING, "%s stable for %d seconds", pool->poolname, opt_fail_switch_delay);
                switch_pools(NULL);
            }
        }

        if (current_pool()->idle)
            switch_pools(NULL);

        if (pool_strategy == POOL_ROTATE && now.tv_sec - rotate_tv.tv_sec > 60 * opt_rotate_period) {
            cgtime(&rotate_tv);
            switch_pools(NULL);
        }

        cgsleep_ms(30000);
            
    }
    return NULL;
}

/* Makes sure the hashmeter keeps going even if mining threads stall, updates
 * the screen at regular intervals, and restarts threads if they appear to have
 * died. */
#define WATCHDOG_INTERVAL       2
#define WATCHDOG_SICK_TIME      120
#define WATCHDOG_DEAD_TIME      600
#define WATCHDOG_SICK_COUNT     (WATCHDOG_SICK_TIME/WATCHDOG_INTERVAL)
#define WATCHDOG_DEAD_COUNT     (WATCHDOG_DEAD_TIME/WATCHDOG_INTERVAL)

static void *watchdog_thread(void __maybe_unused *userdata)
{
    const unsigned int interval = WATCHDOG_INTERVAL;
    struct timeval zero_tv;

    pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

    RenameThread("watchdog");

    memset(&zero_tv, 0, sizeof(struct timeval));
    cgtime(&rotate_tv);

    while (1) {
        int i;
        struct timeval now;

        sleep(interval);

        discard_stale();

        hashmeter(-1, &zero_tv, 0);

#ifdef HAVE_CURSES
        if (curses_active_locked()) {
            struct cgpu_info *cgpu;
            int count;

            change_logwinsize();
            curses_print_status();
            count = 0;
            for (i = 0; i < total_devices; i++) {
                cgpu = get_devices(i);
#ifndef USE_USBUTILS
                if (cgpu)
#else
                if (cgpu && !cgpu->usbinfo.nodev)
#endif
                    curses_print_devstatus(cgpu, count++);
            }
#ifdef USE_USBUTILS
            for (i = 0; i < total_devices; i++) {
                cgpu = get_devices(i);
                if (cgpu && cgpu->usbinfo.nodev)
                    curses_print_devstatus(cgpu, count++);
            }
#endif
            touchwin(statuswin);
            wrefresh(statuswin);
            touchwin(logwin);
            wrefresh(logwin);
            unlock_curses();
        }
#endif

        cgtime(&now);

        if (!sched_paused && !should_run()) {
            applog(LOG_WARNING, "Pausing execution as per stop time %02d:%02d scheduled",
                   schedstop.tm.tm_hour, schedstop.tm.tm_min);
            if (!schedstart.enable) {
                quit(0, "Terminating execution as planned");
                break;
            }

            applog(LOG_WARNING, "Will restart execution as scheduled at %02d:%02d",
                   schedstart.tm.tm_hour, schedstart.tm.tm_min);
            sched_paused = true;

            rd_lock(&mining_thr_lock);
            for (i = 0; i < mining_threads; i++)
                mining_thr[i]->pause = true;
            rd_unlock(&mining_thr_lock);
        } else if (sched_paused && should_run()) {
            applog(LOG_WARNING, "Restarting execution as per start time %02d:%02d scheduled",
                schedstart.tm.tm_hour, schedstart.tm.tm_min);
            if (schedstop.enable)
                applog(LOG_WARNING, "Will pause execution as scheduled at %02d:%02d",
                    schedstop.tm.tm_hour, schedstop.tm.tm_min);
            sched_paused = false;

            for (i = 0; i < mining_threads; i++) {
                struct thr_info *thr;

                thr = get_thread(i);

                /* Don't touch disabled devices */
                if (thr->cgpu->deven == DEV_DISABLED)
                    continue;
                thr->pause = false;
                applog(LOG_DEBUG, "Pushing sem post to thread %d", thr->id);
                cgsem_post(&thr->sem);
            }
        }

        for (i = 0; i < total_devices; ++i) {
            struct cgpu_info *cgpu = get_devices(i);
            struct thr_info *thr = cgpu->thr[0];
            enum dev_enable *denable;
            char dev_str[8];
            int gpu;

            cgpu->drv->get_stats(cgpu);

            gpu = cgpu->device_id;
            denable = &cgpu->deven;
            snprintf(dev_str, sizeof(dev_str), "%s%d", cgpu->drv->name, gpu);

#ifdef HAVE_ADL
            if (adl_active && cgpu->has_adl)
                gpu_autotune(gpu, denable);
            if (opt_debug && cgpu->has_adl) {
                int engineclock = 0, memclock = 0, activity = 0, fanspeed = 0, fanpercent = 0, powertune = 0;
                float temp = 0, vddc = 0;

                if (gpu_stats(gpu, &temp, &engineclock, &memclock, &vddc, &activity, &fanspeed, &fanpercent, &powertune))
                    applog(LOG_DEBUG, "%.1f C  F: %d%%(%dRPM)  E: %dMHz  M: %dMhz  V: %.3fV  A: %d%%  P: %d%%",
                    temp, fanpercent, fanspeed, engineclock, memclock, vddc, activity, powertune);
            }
#endif
            
            /* Thread is waiting on getwork or disabled */
            if (thr->getwork || *denable == DEV_DISABLED)
                continue;

            if (cgpu->status != LIFE_WELL && (now.tv_sec - thr->last.tv_sec < WATCHDOG_SICK_TIME)) {
                if (cgpu->status != LIFE_INIT)
                applog(LOG_ERR, "%s: Recovered, declaring WELL!", dev_str);
                cgpu->status = LIFE_WELL;
                cgpu->device_last_well = time(NULL);
            } else if (cgpu->status == LIFE_WELL && (now.tv_sec - thr->last.tv_sec > WATCHDOG_SICK_TIME)) {
                thr->rolling = cgpu->rolling = 0;
                cgpu->status = LIFE_SICK;
                applog(LOG_ERR, "%s: Idle for more than 60 seconds, declaring SICK!", dev_str);
                cgtime(&thr->sick);

                dev_error(cgpu, REASON_DEV_SICK_IDLE_60);
#ifdef HAVE_ADL
                if (adl_active && cgpu->has_adl && gpu_activity(gpu) > 50) {
                    applog(LOG_ERR, "GPU still showing activity suggesting a hard hang.");
                    applog(LOG_ERR, "Will not attempt to auto-restart it.");
                } else
#endif
                if (opt_restart) {
                    applog(LOG_ERR, "%s: Attempting to restart", dev_str);
                    reinit_device(cgpu);
                }
            } else if (cgpu->status == LIFE_SICK && (now.tv_sec - thr->last.tv_sec > WATCHDOG_DEAD_TIME)) {
                cgpu->status = LIFE_DEAD;
                applog(LOG_ERR, "%s: Not responded for more than 10 minutes, declaring DEAD!", dev_str);
                cgtime(&thr->sick);

                dev_error(cgpu, REASON_DEV_DEAD_IDLE_600);
            } else if (now.tv_sec - thr->sick.tv_sec > 60 &&
                   (cgpu->status == LIFE_SICK || cgpu->status == LIFE_DEAD)) {
                /* Attempt to restart a GPU that's sick or dead once every minute */
                cgtime(&thr->sick);
#ifdef HAVE_ADL
                if (adl_active && cgpu->has_adl && gpu_activity(gpu) > 50) {
                    /* Again do not attempt to restart a device that may have hard hung */
                } else
#endif
                if (opt_restart)
                    reinit_device(cgpu);
            }
        }
    }

    return NULL;
}

static void log_print_status(struct cgpu_info *cgpu)
{
    char logline[255];

    get_statline(logline, sizeof(logline), cgpu);
    applog(LOG_WARNING, "%s", logline);
}

static void noop_get_statline(char __maybe_unused *buf, size_t __maybe_unused bufsiz, struct cgpu_info __maybe_unused *cgpu);
void blank_get_statline_before(char *buf, size_t bufsiz, struct cgpu_info __maybe_unused *cgpu);

void print_summary(void)
{
    struct timeval diff;
    int hours, mins, secs, i;
    double utility, displayed_hashes, work_util;
    bool mhash_base = true;

    timersub(&total_tv_end, &total_tv_start, &diff);
    hours = diff.tv_sec / 3600;
    mins = (diff.tv_sec % 3600) / 60;
    secs = diff.tv_sec % 60;

    utility = total_accepted / total_secs * 60;
    work_util = total_diff1 / total_secs * 60;

    applog(LOG_WARNING, "\nSummary of runtime statistics:\n");
    applog(LOG_WARNING, "Started at %s", datestamp);
    if (total_pools == 1)
        applog(LOG_WARNING, "Pool: %s", pools[0]->rpc_url);
    applog(LOG_WARNING, "Runtime: %d hrs : %d mins : %d secs", hours, mins, secs);
    displayed_hashes = total_mhashes_done / total_secs;
    if (displayed_hashes < 1) {
        displayed_hashes *= 1000;
        mhash_base = false;
    }

    applog(LOG_WARNING, "Average hashrate: %.1f %shash/s", displayed_hashes, mhash_base? "Mega" : "Kilo");
    applog(LOG_WARNING, "Solved blocks: %d", found_blocks);
    applog(LOG_WARNING, "Best share difficulty: %s", best_share);
    applog(LOG_WARNING, "Share submissions: %d", total_accepted + total_rejected);
    applog(LOG_WARNING, "Accepted shares: %d", total_accepted);
    applog(LOG_WARNING, "Rejected shares: %d", total_rejected);
    applog(LOG_WARNING, "Accepted difficulty shares: %1.f", total_diff_accepted);
    applog(LOG_WARNING, "Rejected difficulty shares: %1.f", total_diff_rejected);
    if (total_accepted || total_rejected)
        applog(LOG_WARNING, "Reject ratio: %.1f%%", (double)(total_rejected * 100) / (double)(total_accepted + total_rejected));
    applog(LOG_WARNING, "Hardware errors: %d", hw_errors);
    applog(LOG_WARNING, "Utility (accepted shares / min): %.2f/min", utility);
    applog(LOG_WARNING, "Work Utility (diff1 shares solved / min): %.2f/min\n", work_util);

    applog(LOG_WARNING, "Stale submissions discarded due to new blocks: %d", total_stale);
    applog(LOG_WARNING, "Unable to get work from server occasions: %d", total_go);
    applog(LOG_WARNING, "Work items generated locally: %d", local_work);
    applog(LOG_WARNING, "Submitting work remotely delay occasions: %d", total_ro);
    applog(LOG_WARNING, "New blocks detected on network: %d\n", new_blocks);

    if (total_pools > 1) {
        for (i = 0; i < total_pools; i++) {
            struct pool *pool = pools[i];

            applog(LOG_WARNING, "Pool: %s", pool->rpc_url);
            if (pool->solved)
                applog(LOG_WARNING, "SOLVED %d BLOCK%s!", pool->solved, pool->solved > 1 ? "S" : "");
            applog(LOG_WARNING, " Share submissions: %d", pool->accepted + pool->rejected);
            applog(LOG_WARNING, " Accepted shares: %d", pool->accepted);
            applog(LOG_WARNING, " Rejected shares: %d", pool->rejected);
            applog(LOG_WARNING, " Accepted difficulty shares: %1.f", pool->diff_accepted);
            applog(LOG_WARNING, " Rejected difficulty shares: %1.f", pool->diff_rejected);
            if (pool->accepted || pool->rejected)
                applog(LOG_WARNING, " Reject ratio: %.1f%%", (double)(pool->rejected * 100) / (double)(pool->accepted + pool->rejected));

            applog(LOG_WARNING, " Items worked on: %d", pool->works);
            applog(LOG_WARNING, " Stale submissions discarded due to new blocks: %d", pool->stale_shares);
            applog(LOG_WARNING, " Unable to get work from server occasions: %d", pool->getfail_occasions);
            applog(LOG_WARNING, " Submitting work remotely delay occasions: %d\n", pool->remotefail_occasions);
        }
    }

    applog(LOG_WARNING, "Summary of per device statistics:\n");
    for (i = 0; i < total_devices; ++i) {
        struct cgpu_info *cgpu = get_devices(i);

        cgpu->drv->get_statline_before = &blank_get_statline_before;
        cgpu->drv->get_statline = &noop_get_statline;
        log_print_status(cgpu);
    }

    if (opt_shares) {
        applog(LOG_WARNING, "Mined %d accepted shares of %d requested\n", total_accepted, opt_shares);
        if (opt_shares > total_accepted)
            applog(LOG_WARNING, "WARNING - Mined only %d shares of %d requested.", total_accepted, opt_shares);
    }
    applog(LOG_WARNING, " ");

    fflush(stderr);
    fflush(stdout);
}

static void clean_up(bool restarting)
{
#ifdef HAVE_OPENCL
    clear_adl(nDevs);
#endif
#ifdef USE_USBUTILS
    usb_polling = false;
    pthread_join(usb_poll_thread, NULL);
        libusb_exit(NULL);
#endif

    cgtime(&total_tv_end);
#ifdef WIN32
    timeEndPeriod(1);
#endif
#ifdef HAVE_CURSES
    disable_curses();
#endif
    if (!restarting && !opt_realquiet && successful_connect)
        print_summary();

    curl_global_cleanup();
}

void _quit(int status)
{
    clean_up(false);

#if defined(unix) || defined(__APPLE__)
    if (forkpid > 0) {
        kill(forkpid, SIGTERM);
        forkpid = 0;
    }
#endif

    exit(status);
}

#ifdef HAVE_CURSES
char *curses_input(const char *query)
{
    char *input;

    echo();
    input = malloc(255);
    if (!input)
        quit(1, "Failed to malloc input");
    leaveok(logwin, false);
    wlogprint("%s:\n", query);
    wgetnstr(logwin, input, 255);
    if (!strlen(input))
        strcpy(input, "-1");
    leaveok(logwin, true);
    noecho();
    return input;
}
#endif

static bool pools_active = false;

static void *test_pool_thread(void *arg)
{
    struct pool *pool = (struct pool *)arg;

    if (pool_active(pool, false)) {
        pool_tset(pool, &pool->lagging);
        pool_tclear(pool, &pool->idle);
        bool first_pool = false;

        cg_wlock(&control_lock);
        if (!pools_active) {
            currentpool = pool;
            if (pool->pool_no != 0)
                first_pool = true;
            pools_active = true;
        }
        cg_wunlock(&control_lock);

        if (unlikely(first_pool))
            applog(LOG_NOTICE, "Switching to %s - first alive pool", pool->poolname);

        pool_resus(pool);
        switch_pools(NULL);
    } else
        pool_died(pool);

    return NULL;
}

/* Always returns true that the pool details were added unless we are not
 * live, implying this is the only pool being added, so if no pools are
 * active it returns false. */
bool add_pool_details(struct pool *pool, bool live, char *url, char *user, char *pass)
{
    size_t siz;

    url = get_proxy(url, pool);

    pool->rpc_url = url;
    pool->rpc_user = user;
    pool->rpc_pass = pass;
    siz = strlen(pool->rpc_user) + strlen(pool->rpc_pass) + 2;
    pool->rpc_userpass = malloc(siz);
    if (!pool->rpc_userpass)
        quit(1, "Failed to malloc userpass");
    snprintf(pool->rpc_userpass, siz, "%s:%s", pool->rpc_user, pool->rpc_pass);

    pool->testing = true;
    pool->idle = true;
    enable_pool(pool);

    pthread_create(&pool->test_thread, NULL, test_pool_thread, (void *)pool);
    if (!live) {
        pthread_join(pool->test_thread, NULL);
        pool->testing = false;
        return pools_active;
    }
    return true;
}

#ifdef HAVE_CURSES
static bool input_pool(bool live)
{
    char *url = NULL, *user = NULL, *pass = NULL;
    struct pool *pool;
    bool ret = false;

    immedok(logwin, true);
    wlogprint("Input server details.\n");

    url = curses_input("URL");
    if (!url)
        goto out;

    user = curses_input("Username");
    if (!user)
        goto out;

    pass = curses_input("Password");
    if (!pass)
        goto out;

    pool = add_pool();

    if (!detect_stratum(pool, url) && strncmp(url, "http://", 7) &&
        strncmp(url, "https://", 8)) {
        char *httpinput;

        httpinput = malloc(256);
        if (!httpinput)
            quit(1, "Failed to malloc httpinput");
        strcpy(httpinput, "http://");
        strncat(httpinput, url, 248);
        free(url);
        url = httpinput;
    }

    ret = add_pool_details(pool, live, url, user, pass);
out:
    immedok(logwin, false);

    if (!ret) {
        if (url)
            free(url);
        if (user)
            free(user);
        if (pass)
            free(pass);
    }
    return ret;
}
#endif

#if defined(unix) || defined(__APPLE__)
static void fork_monitor()
{
    // Make a pipe: [readFD, writeFD]
    int pfd[2];
    int r = pipe(pfd);

    if (r < 0) {
        perror("pipe - failed to create pipe for --monitor");
        exit(1);
    }

    // Make stderr write end of pipe
    fflush(stderr);
    r = dup2(pfd[1], 2);
    if (r < 0) {
        perror("dup2 - failed to alias stderr to write end of pipe for --monitor");
        exit(1);
    }
    r = close(pfd[1]);
    if (r < 0) {
        perror("close - failed to close write end of pipe for --monitor");
        exit(1);
    }

    // Don't allow a dying monitor to kill the main process
    sighandler_t sr0 = signal(SIGPIPE, SIG_IGN);
    sighandler_t sr1 = signal(SIGPIPE, SIG_IGN);
    if (SIG_ERR == sr0 || SIG_ERR == sr1) {
        perror("signal - failed to edit signal mask for --monitor");
        exit(1);
    }

    // Fork a child process
    forkpid = fork();
    if (forkpid < 0) {
        perror("fork - failed to fork child process for --monitor");
        exit(1);
    }

    // Child: launch monitor command
    if (0 == forkpid) {
        // Make stdin read end of pipe
        r = dup2(pfd[0], 0);
        if (r < 0) {
            perror("dup2 - in child, failed to alias read end of pipe to stdin for --monitor");
            exit(1);
        }
        close(pfd[0]);
        if (r < 0) {
            perror("close - in child, failed to close read end of  pipe for --monitor");
            exit(1);
        }

        // Launch user specified command
        execl("/bin/bash", "/bin/bash", "-c", opt_stderr_cmd, (char*)NULL);
        perror("execl - in child failed to exec user specified command for --monitor");
        exit(1);
    }

    // Parent: clean up unused fds and bail
    r = close(pfd[0]);
    if (r < 0) {
        perror("close - failed to close read end of pipe for --monitor");
        exit(1);
    }
}
#endif // defined(unix)

#ifdef HAVE_CURSES
static void enable_curses_windows(void)
{
    int x,y;

    getmaxyx(mainwin, y, x);
    statuswin = newwin(logstart, x, 0, 0);
    leaveok(statuswin, true);
    logwin = newwin(y - logcursor, 0, logcursor, 0);
    idlok(logwin, true);
    scrollok(logwin, true);
    leaveok(logwin, true);
    cbreak();
    noecho();
}
void enable_curses(void) {
    lock_curses();
    if (curses_active) {
        unlock_curses();
        return;
    }

    mainwin = initscr();
    start_color();
#if defined(PDCURSES) || defined(NCURSES_VERSION)
    if (ERR != use_default_colors())
        default_bgcolor = -1;
#endif
    if (has_colors() && ERR != init_pair(1, COLOR_WHITE, COLOR_BLUE))
    {
        menu_attr = COLOR_PAIR(1);
        if (ERR != init_pair(2, COLOR_RED, default_bgcolor))
            attr_bad |= COLOR_PAIR(2);
    }
    enable_curses_windows();
    curses_active = true;
    statusy = logstart;
    unlock_curses();
}
#endif

static int cgminer_id_count = 0;

/* Various noop functions for drivers that don't support or need their
 * variants. */
static void noop_reinit_device(struct cgpu_info __maybe_unused *cgpu)
{
}

void blank_get_statline_before(char *buf, size_t bufsiz, struct cgpu_info __maybe_unused *cgpu)
{
    tailsprintf(buf, bufsiz, "               | ");
}

static void noop_get_statline(char __maybe_unused *buf, size_t __maybe_unused bufsiz, struct cgpu_info __maybe_unused *cgpu)
{
}

static bool noop_get_stats(struct cgpu_info __maybe_unused *cgpu)
{
    return true;
}

static bool noop_thread_prepare(struct thr_info __maybe_unused *thr)
{
    return true;
}

static uint64_t noop_can_limit_work(struct thr_info __maybe_unused *thr)
{
    return 0xffffffff;
}

static bool noop_thread_init(struct thr_info __maybe_unused *thr)
{
    return true;
}

static bool noop_prepare_work(struct thr_info __maybe_unused *thr, struct work __maybe_unused *work)
{
    return true;
}

static void noop_hw_error(struct thr_info __maybe_unused *thr)
{
}

static void noop_thread_shutdown(struct thr_info __maybe_unused *thr)
{
}

static void noop_thread_enable(struct thr_info __maybe_unused *thr)
{
}

static void noop_detect(bool __maybe_unused hotplug)
{
}
#define noop_flush_work noop_reinit_device
#define noop_update_work noop_reinit_device
#define noop_queue_full noop_get_stats

/* Fill missing driver drv functions with noops */
void fill_device_drv(struct device_drv *drv)
{
    if (!drv->drv_detect)
        drv->drv_detect = &noop_detect;
    if (!drv->reinit_device)
        drv->reinit_device = &noop_reinit_device;
    if (!drv->get_statline_before)
        drv->get_statline_before = &blank_get_statline_before;
    if (!drv->get_statline)
        drv->get_statline = &noop_get_statline;
    if (!drv->get_stats)
        drv->get_stats = &noop_get_stats;
    if (!drv->thread_prepare)
        drv->thread_prepare = &noop_thread_prepare;
    if (!drv->can_limit_work)
        drv->can_limit_work = &noop_can_limit_work;
    if (!drv->thread_init)
        drv->thread_init = &noop_thread_init;
    if (!drv->prepare_work)
        drv->prepare_work = &noop_prepare_work;
    if (!drv->hw_error)
        drv->hw_error = &noop_hw_error;
    if (!drv->thread_shutdown)
        drv->thread_shutdown = &noop_thread_shutdown;
    if (!drv->thread_enable)
        drv->thread_enable = &noop_thread_enable;
    if (!drv->hash_work)
        drv->hash_work = &hash_sole_work;
    if (!drv->flush_work)
        drv->flush_work = &noop_flush_work;
    if (!drv->update_work)
        drv->update_work = &noop_update_work;
    if (!drv->queue_full)
        drv->queue_full = &noop_queue_full;
    if (!drv->max_diff)
        drv->max_diff = 1;
    if (!drv->working_diff)
        drv->working_diff = 1;
}

void enable_device(struct cgpu_info *cgpu)
{
    cgpu->deven = DEV_ENABLED;

    wr_lock(&devices_lock);
    devices[cgpu->cgminer_id = cgminer_id_count++] = cgpu;
    wr_unlock(&devices_lock);

    if (hotplug_mode) {
        new_threads += cgpu->threads;
#ifdef HAVE_CURSES
        adj_width(mining_threads + new_threads, &dev_width);
#endif
    } else {
        mining_threads += cgpu->threads;
#ifdef HAVE_CURSES
        adj_width(mining_threads, &dev_width);
#endif
    }
#ifdef HAVE_OPENCL
    if (cgpu->drv->drv_id == DRIVER_opencl) {
        gpu_threads += cgpu->threads;
    }
#endif
    rwlock_init(&cgpu->qlock);
    cgpu->queued_work = NULL;
}

struct _cgpu_devid_counter {
    char name[4];
    int lastid;
    UT_hash_handle hh;
};

static void adjust_mostdevs(void)
{
    if (total_devices - zombie_devs > most_devices)
        most_devices = total_devices - zombie_devs;
}

bool add_cgpu(struct cgpu_info *cgpu)
{
    static struct _cgpu_devid_counter *devids = NULL;
    struct _cgpu_devid_counter *d;
    
    HASH_FIND_STR(devids, cgpu->drv->name, d);
    if (d)
        cgpu->device_id = ++d->lastid;
    else {
        d = malloc(sizeof(*d));
        memcpy(d->name, cgpu->drv->name, sizeof(d->name));
        cgpu->device_id = d->lastid = 0;
        HASH_ADD_STR(devids, name, d);
    }

    wr_lock(&devices_lock);
    devices = realloc(devices, sizeof(struct cgpu_info *) * (total_devices + new_devices + 2));
    wr_unlock(&devices_lock);

    mutex_lock(&stats_lock);
    cgpu->last_device_valid_work = time(NULL);
    mutex_unlock(&stats_lock);

    if (hotplug_mode)
        devices[total_devices + new_devices++] = cgpu;
    else
        devices[total_devices++] = cgpu;

    adjust_mostdevs();
    return true;
}

struct device_drv *copy_drv(struct device_drv *drv)
{
    struct device_drv *copy;

    if (unlikely(!(copy = malloc(sizeof(*copy))))) {
        quit(1, "Failed to allocate device_drv copy of %s (%s)",
                drv->name, drv->copy ? "copy" : "original");
    }
    memcpy(copy, drv, sizeof(*copy));
    copy->copy = true;
    return copy;
}

#ifdef USE_USBUTILS
static void hotplug_process(void)
{
    struct thr_info *thr;
    int i, j;

    for (i = 0; i < new_devices; i++) {
        struct cgpu_info *cgpu;
        int dev_no = total_devices + i;

        cgpu = devices[dev_no];
        if (!opt_devs_enabled || (opt_devs_enabled && devices_enabled[dev_no]))
            enable_device(cgpu);
        cgpu->cgminer_stats.getwork_wait_min.tv_sec = MIN_SEC_UNSET;
        cgpu->rolling = cgpu->total_mhashes = 0;
    }

    wr_lock(&mining_thr_lock);
    mining_thr = realloc(mining_thr, sizeof(thr) * (mining_threads + new_threads + 1));

    if (!mining_thr)
        quit(1, "Failed to hotplug realloc mining_thr");
    for (i = 0; i < new_threads; i++) {
        mining_thr[mining_threads + i] = calloc(1, sizeof(*thr));
        if (!mining_thr[mining_threads + i])
            quit(1, "Failed to hotplug calloc mining_thr[%d]", i);
    }

    // Start threads
    for (i = 0; i < new_devices; ++i) {
        struct cgpu_info *cgpu = devices[total_devices];
        cgpu->thr = malloc(sizeof(*cgpu->thr) * (cgpu->threads+1));
        cgpu->thr[cgpu->threads] = NULL;
        cgpu->status = LIFE_INIT;
        cgtime(&(cgpu->dev_start_tv));

        for (j = 0; j < cgpu->threads; ++j) {
            thr = __get_thread(mining_threads);
            thr->id = mining_threads;
            thr->cgpu = cgpu;
            thr->device_thread = j;

            if (cgpu->drv->thread_prepare && !cgpu->drv->thread_prepare(thr))
                continue;

            if (unlikely(thr_info_create(thr, NULL, miner_thread, thr)))
                quit(1, "hotplug thread %d create failed", thr->id);

            cgpu->thr[j] = thr;

            /* Enable threads for devices set not to mine but disable
             * their queue in case we wish to enable them later */
            if (cgpu->deven != DEV_DISABLED) {
                applog(LOG_DEBUG, "Pushing sem post to thread %d", thr->id);
                cgsem_post(&thr->sem);
            }

            mining_threads++;
        }
        total_devices++;
        applog(LOG_WARNING, "Hotplug: %s added %s %i", cgpu->drv->dname, cgpu->drv->name, cgpu->device_id);
    }
    wr_unlock(&mining_thr_lock);

    adjust_mostdevs();
    switch_logsize(true);
}

#define DRIVER_DRV_DETECT_HOTPLUG(X) X##_drv.drv_detect(true);

static void *hotplug_thread(void __maybe_unused *userdata)
{
    pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

    RenameThread("hotplug");

    hotplug_mode = true;

    cgsleep_ms(5000);

    while (0x2a) {
// Version 0.1 just add the devices on - worry about using nodev later

        if (hotplug_time == 0)
            cgsleep_ms(5000);
        else {
            new_devices = 0;
            new_threads = 0;

            /* Use the DRIVER_PARSE_COMMANDS macro to detect all
             * devices */
            DRIVER_PARSE_COMMANDS(DRIVER_DRV_DETECT_HOTPLUG)

            if (new_devices)
                hotplug_process();

            // hotplug_time >0 && <=9999
            cgsleep_ms(hotplug_time * 1000);
        }
    }

    return NULL;
}
#endif

static void probe_pools(void)
{
    int i;

    for (i = 0; i < total_pools; i++) {
        struct pool *pool = pools[i];

        pool->testing = true;
        pthread_create(&pool->test_thread, NULL, test_pool_thread, (void *)pool);
    }
}

#define DRIVER_FILL_DEVICE_DRV(X) fill_device_drv(&X##_drv);
#define DRIVER_DRV_DETECT_ALL(X) X##_drv.drv_detect(false);

#ifdef USE_USBUTILS
static void *libusb_poll_thread(void __maybe_unused *arg)
{
    struct timeval tv_end = {1, 0};

    RenameThread("usbpoll");

    while (usb_polling)
        libusb_handle_events_timeout_completed(NULL, &tv_end, NULL);

    /* Cancel any cancellable usb transfers */
    cancel_usb_transfers();

    /* Keep event handling going until there are no async transfers in
     * flight. */
    do {
        libusb_handle_events_timeout_completed(NULL, &tv_end, NULL);
    } while (async_usb_transfers());

    return NULL;
}

static void initialise_usb(void) {
    int err = libusb_init(NULL);
    if (err) {
        fprintf(stderr, "libusb_init() failed err %d", err);
        fflush(stderr);
        quit(1, "libusb_init() failed");
    }
    mutex_init(&cgusb_lock);
    mutex_init(&cgusbres_lock);
    cglock_init(&cgusb_fd_lock);
    usb_polling = true;
    pthread_create(&usb_poll_thread, NULL, libusb_poll_thread, NULL);
}
#else
#define initialise_usb() {}
#endif

int main(int argc, char *argv[])
{
    struct sigaction handler;
    struct thr_info *thr;
    struct block *block;
    unsigned int k;
    int i, j;
    char *s;

    /* This dangerous functions tramples random dynamically allocated
     * variables so do it before anything at all */
    if (unlikely(curl_global_init(CURL_GLOBAL_ALL)))
        quit(1, "Failed to curl_global_init");

#if LOCK_TRACKING
    // Must be first
    if (unlikely(pthread_mutex_init(&lockstat_lock, NULL)))
        quithere(1, "Failed to pthread_mutex_init lockstat_lock errno=%d", errno);
#endif

    initial_args = malloc(sizeof(char *) * (argc + 1));
    for  (i = 0; i < argc; i++)
        initial_args[i] = strdup(argv[i]);
    initial_args[argc] = NULL;

    mutex_init(&hash_lock);
    mutex_init(&console_lock);
    cglock_init(&control_lock);
    mutex_init(&stats_lock);
    mutex_init(&sharelog_lock);
    cglock_init(&ch_lock);
    mutex_init(&sshare_lock);
    rwlock_init(&blk_lock);
    rwlock_init(&netacc_lock);
    rwlock_init(&mining_thr_lock);
    rwlock_init(&devices_lock);

    mutex_init(&lp_lock);
    if (unlikely(pthread_cond_init(&lp_cond, NULL)))
        quit(1, "Failed to pthread_cond_init lp_cond");

    mutex_init(&restart_lock);
    if (unlikely(pthread_cond_init(&restart_cond, NULL)))
        quit(1, "Failed to pthread_cond_init restart_cond");

    if (unlikely(pthread_cond_init(&gws_cond, NULL)))
        quit(1, "Failed to pthread_cond_init gws_cond");

    initialise_usb();

    snprintf(packagename, sizeof(packagename), "%s %s", PACKAGE, VERSION);

    handler.sa_handler = &sighandler;
    handler.sa_flags = 0;
    sigemptyset(&handler.sa_mask);
    sigaction(SIGTERM, &handler, &termhandler);
    sigaction(SIGINT, &handler, &inthandler);
#ifndef WIN32
    signal(SIGPIPE, SIG_IGN);
#else
    timeBeginPeriod(1);
#endif
    opt_kernel_path = alloca(PATH_MAX);
    strcpy(opt_kernel_path, CGMINER_PREFIX);
    cgminer_path = alloca(PATH_MAX);
    s = strdup(argv[0]);
    strcpy(cgminer_path, dirname(s));
    free(s);
    strcat(cgminer_path, "/");

    devcursor = 7;
    logstart = devcursor + 1;
    logcursor = logstart;

    block = calloc(sizeof(struct block), 1);
    if (unlikely(!block))
        quit (1, "main OOM");
    for (i = 0; i < 36; i++)
        strcat(block->hash, "0");
    HASH_ADD_STR(blocks, hash, block);
    strcpy(current_hash, block->hash);

    INIT_LIST_HEAD(&scan_devices);

#ifdef HAVE_OPENCL
    memset(gpus, 0, sizeof(gpus));
    for (i = 0; i < MAX_GPUDEVICES; i++)
        gpus[i].dynamic = true;
#endif

    /* parse command line */
    opt_register_table(opt_config_table,
               "Options for both config file and command line");
    opt_register_table(opt_cmdline_table,
               "Options for command line only");

    opt_parse(&argc, argv, applog_and_exit);
    if (argc != 1)
        quit(1, "Unexpected extra commandline arguments");

    if (!config_loaded)
        load_default_config();

    if (opt_benchmark) {
        struct pool *pool;

        if (opt_scrypt)
            quit(1, "Cannot use benchmark mode with scrypt");
        pool = add_pool();
        pool->rpc_url = malloc(255);
        strcpy(pool->rpc_url, "Benchmark");
        pool->rpc_user = pool->rpc_url;
        pool->rpc_pass = pool->rpc_url;
        enable_pool(pool);
        pool->idle = false;
        successful_connect = true;
    }

#ifdef HAVE_CURSES
    if (opt_realquiet || opt_display_devs)
        use_curses = false;

    if (use_curses)
        enable_curses();
#endif

    applog(LOG_WARNING, "Started %s", packagename);
    if (cnfbuf) {
        applog(LOG_NOTICE, "Loaded configuration file %s", cnfbuf);
        switch (fileconf_load) {
            case 0:
                applog(LOG_WARNING, "Fatal JSON error in configuration file.");
                applog(LOG_WARNING, "Configuration file could not be used.");
                break;
            case -1:
                applog(LOG_WARNING, "Error in configuration file, partially loaded.");
                if (use_curses)
                    applog(LOG_WARNING, "Start cgminer with -T to see what failed to load.");
                break;
            default:
                break;
        }
        free(cnfbuf);
        cnfbuf = NULL;
    }

    strcat(opt_kernel_path, "/");

    if (want_per_device_stats)
        opt_log_output = true;

    /* Use a shorter scantime for scrypt */
    if (opt_scantime < 0)
        opt_scantime = opt_scrypt ? 30 : 60;

    total_control_threads = 9;
    control_thr = calloc(total_control_threads, sizeof(*thr));
    if (!control_thr)
        quit(1, "Failed to calloc control_thr");

    gwsched_thr_id = 0;

#ifdef USE_USBUTILS
    usb_initialise();

    // before device detection
    if (!opt_scrypt) {
        cgsem_init(&usb_resource_sem);
        usbres_thr_id = 1;
        thr = &control_thr[usbres_thr_id];
        if (thr_info_create(thr, NULL, usb_resource_thread, thr))
            quit(1, "usb resource thread create failed");
        pthread_detach(thr->pth);
    }
#endif

    /* Use the DRIVER_PARSE_COMMANDS macro to fill all the device_drvs */
    DRIVER_PARSE_COMMANDS(DRIVER_FILL_DEVICE_DRV)

    if (opt_scrypt)
        opencl_drv.drv_detect(false);
    else {
    /* Use the DRIVER_PARSE_COMMANDS macro to detect all devices */
        DRIVER_PARSE_COMMANDS(DRIVER_DRV_DETECT_ALL)
    }

    if (opt_display_devs) {
        applog(LOG_ERR, "Devices detected:");
        for (i = 0; i < total_devices; ++i) {
            struct cgpu_info *cgpu = devices[i];
            if (cgpu->name)
                applog(LOG_ERR, " %2d. %s %d: %s (driver: %s)", i, cgpu->drv->name, cgpu->device_id, cgpu->name, cgpu->drv->dname);
            else
                applog(LOG_ERR, " %2d. %s %d (driver: %s)", i, cgpu->drv->name, cgpu->device_id, cgpu->drv->dname);
        }
        quit(0, "%d devices listed", total_devices);
    }

    mining_threads = 0;
    if (opt_devs_enabled) {
        for (i = 0; i < MAX_DEVICES; i++) {
            if (devices_enabled[i]) {
                if (i >= total_devices)
                    quit (1, "Command line options set a device that doesn't exist");
                enable_device(devices[i]);
            } else if (i < total_devices) {
                if (!opt_removedisabled)
                    enable_device(devices[i]);
                devices[i]->deven = DEV_DISABLED;
            }
        }
        total_devices = cgminer_id_count;
    } else {
        for (i = 0; i < total_devices; ++i)
            enable_device(devices[i]);
    }

#ifdef USE_USBUTILS
    if (!total_devices) {
        applog(LOG_WARNING, "No devices detected!");
        applog(LOG_WARNING, "Waiting for USB hotplug devices or press q to quit");
    }
#else
    if (!total_devices)
        quit(1, "All devices disabled, cannot mine!");
#endif

    most_devices = total_devices;

    load_temp_cutoffs();

    for (i = 0; i < total_devices; ++i)
        devices[i]->cgminer_stats.getwork_wait_min.tv_sec = MIN_SEC_UNSET;

    if (!opt_compact) {
        logstart += most_devices;
        logcursor = logstart + 1;
#ifdef HAVE_CURSES
        check_winsizes();
#endif
    }

#ifdef USE_SCRYPT // I don't really know if this is relevant for other mining platforms
    if (!getenv("GPU_MAX_ALLOC_PERCENT"))
        applog(LOG_WARNING, "WARNING: GPU_MAX_ALLOC_PERCENT is not specified!");
    if (!getenv("GPU_USE_SYNC_OBJECTS"))
        applog(LOG_WARNING, "WARNING: GPU_USE_SYNC_OBJECTS is not specified!");
#endif

    if (!total_pools) {
        applog(LOG_WARNING, "Need to specify at least one pool server.");
#ifdef HAVE_CURSES
        if (!use_curses || !input_pool(false))
#endif
            quit(1, "Pool setup failed");
    }

    for (i = 0; i < total_pools; i++) {
        struct pool *pool = pools[i];
        size_t siz;

        pool->cgminer_stats.getwork_wait_min.tv_sec = MIN_SEC_UNSET;
        pool->cgminer_pool_stats.getwork_wait_min.tv_sec = MIN_SEC_UNSET;

        if (!pool->rpc_userpass) {
            if (!pool->rpc_user || !pool->rpc_pass)
                quit(1, "No login credentials supplied for %s", pool->poolname);
            siz = strlen(pool->rpc_user) + strlen(pool->rpc_pass) + 2;
            pool->rpc_userpass = malloc(siz);
            if (!pool->rpc_userpass)
                quit(1, "Failed to malloc userpass");
            snprintf(pool->rpc_userpass, siz, "%s:%s", pool->rpc_user, pool->rpc_pass);
        }
    }
    /* Set the currentpool to pool 0 */
    currentpool = pools[0];

#ifdef HAVE_SYSLOG_H
    if (use_syslog)
        openlog(PACKAGE, LOG_PID, LOG_USER);
#endif

    #if defined(unix) || defined(__APPLE__)
        if (opt_stderr_cmd)
            fork_monitor();
    #endif // defined(unix)

    mining_thr = calloc(mining_threads, sizeof(thr));
    if (!mining_thr)
        quit(1, "Failed to calloc mining_thr");
    for (i = 0; i < mining_threads; i++) {
        mining_thr[i] = calloc(1, sizeof(*thr));
        if (!mining_thr[i])
            quit(1, "Failed to calloc mining_thr[%d]", i);
    }

    stage_thr_id = 2;
    thr = &control_thr[stage_thr_id];
    thr->q = tq_new();
    if (!thr->q)
        quit(1, "Failed to tq_new");
    /* start stage thread */
    if (thr_info_create(thr, NULL, stage_thread, thr))
        quit(1, "stage thread create failed");
    pthread_detach(thr->pth);

    /* Create a unique get work queue */
    getq = tq_new();
    if (!getq)
        quit(1, "Failed to create getq");
    /* We use the getq mutex as the staged lock */
    stgd_lock = &getq->mutex;

    if (opt_benchmark)
        goto begin_bench;

    for (i = 0; i < total_pools; i++) {
        struct pool *pool  = pools[i];

        enable_pool(pool);
        pool->idle = true;
    }

    applog(LOG_NOTICE, "Probing for an alive pool");
    do {
        int slept = 0;

        /* Look for at least one active pool before starting */
        probe_pools();
        do {
            sleep(1);
            slept++;
        } while (!pools_active && slept < 60);

        if (!pools_active) {
            applog(LOG_ERR, "No servers were found that could be used to get work from.");
            applog(LOG_ERR, "Please check the details from the list below of the servers you have input");
            applog(LOG_ERR, "Most likely you have input the wrong URL, forgotten to add a port, or have not set up workers");
            for (i = 0; i < total_pools; i++) {
                struct pool *pool;

                pool = pools[i];
                applog(LOG_WARNING, "Pool: %d  URL: %s  User: %s  Password: %s",
                       i, pool->rpc_url, pool->rpc_user, pool->rpc_pass);
            }
#ifdef HAVE_CURSES
            if (use_curses) {
                halfdelay(150);
                applog(LOG_ERR, "Press any key to exit, or cgminer will try again in 15s.");
                if (getch() != ERR)
                    quit(0, "No servers could be used! Exiting.");
                cbreak();
            } else
#endif
                quit(0, "No servers could be used! Exiting.");
        }
    } while (!pools_active);

begin_bench:
    total_mhashes_done = 0;
    for (i = 0; i < total_devices; i++) {
        struct cgpu_info *cgpu = devices[i];

        cgpu->rolling = cgpu->total_mhashes = 0;
    }
    
    cgtime(&total_tv_start);
    cgtime(&total_tv_end);
    get_datestamp(datestamp, sizeof(datestamp), &total_tv_start);

    // Start threads
    k = 0;
    for (i = 0; i < total_devices; ++i) {
        struct cgpu_info *cgpu = devices[i];
        cgpu->thr = malloc(sizeof(*cgpu->thr) * (cgpu->threads+1));
        cgpu->thr[cgpu->threads] = NULL;
        cgpu->status = LIFE_INIT;

        for (j = 0; j < cgpu->threads; ++j, ++k) {
            thr = get_thread(k);
            thr->id = k;
            thr->cgpu = cgpu;
            thr->device_thread = j;

            if (!cgpu->drv->thread_prepare(thr))
                continue;

            if (unlikely(thr_info_create(thr, NULL, miner_thread, thr)))
                quit(1, "thread %d create failed", thr->id);

            cgpu->thr[j] = thr;

            /* Enable threads for devices set not to mine but disable
             * their queue in case we wish to enable them later */
            if (cgpu->deven != DEV_DISABLED) {
                applog(LOG_DEBUG, "Pushing sem post to thread %d", thr->id);
                cgsem_post(&thr->sem);
            }
        }
    }

#ifdef HAVE_OPENCL
    applog(LOG_INFO, "%d gpu miner threads started", gpu_threads);
    for (i = 0; i < nDevs; i++)
        pause_dynamic_threads(i);
#endif

    cgtime(&total_tv_start);
    cgtime(&total_tv_end);

    watchpool_thr_id = 3;
    thr = &control_thr[watchpool_thr_id];
    /* start watchpool thread */
    if (thr_info_create(thr, NULL, watchpool_thread, NULL))
        quit(1, "watchpool thread create failed");
    pthread_detach(thr->pth);

    watchdog_thr_id = 4;
    thr = &control_thr[watchdog_thr_id];
    /* start watchdog thread */
    if (thr_info_create(thr, NULL, watchdog_thread, NULL))
        quit(1, "watchdog thread create failed");
    pthread_detach(thr->pth);

#ifdef HAVE_OPENCL
    /* Create reinit gpu thread */
    gpur_thr_id = 5;
    thr = &control_thr[gpur_thr_id];
    thr->q = tq_new();
    if (!thr->q)
        quit(1, "tq_new failed for gpur_thr_id");
    if (thr_info_create(thr, NULL, reinit_gpu, thr))
        quit(1, "reinit_gpu thread create failed");
#endif  

    /* Create API socket thread */
    api_thr_id = 6;
    thr = &control_thr[api_thr_id];
    if (thr_info_create(thr, NULL, api_thread, thr))
        quit(1, "API thread create failed");

#ifdef USE_USBUTILS
    if (!opt_scrypt) {
        hotplug_thr_id = 7;
        thr = &control_thr[hotplug_thr_id];
        if (thr_info_create(thr, NULL, hotplug_thread, thr))
            quit(1, "hotplug thread create failed");
        pthread_detach(thr->pth);
    }
#endif

#ifdef HAVE_CURSES
    /* Create curses input thread for keyboard input. Create this last so
     * that we know all threads are created since this can call kill_work
     * to try and shut down all previous threads. */
    input_thr_id = 8;
    thr = &control_thr[input_thr_id];
    if (thr_info_create(thr, NULL, input_thread, thr))
        quit(1, "input thread create failed");
    pthread_detach(thr->pth);
#endif

    /* Just to be sure */
    if (total_control_threads != 9)
        quit(1, "incorrect total_control_threads (%d) should be 9", total_control_threads);

    /* Once everything is set up, main() becomes the getwork scheduler */
    while (42) {
        int ts, max_staged = opt_queue;
        struct pool *pool, *cp;
        bool lagging = false;
        struct work *work;

        if (opt_work_update)
            signal_work_update();
        opt_work_update = false;
        cp = current_pool();

        /* If the primary pool is a getwork pool and cannot roll work,
         * try to stage one extra work per mining thread */
        if (!pool_localgen(cp) && !staged_rollable)
            max_staged += mining_threads;

        mutex_lock(stgd_lock);
        ts = __total_staged();

        if (!pool_localgen(cp) && !ts && !opt_fail_only)
            lagging = true;

        /* Wait until hash_pop tells us we need to create more work */
        if (ts > max_staged) {
            pthread_cond_wait(&gws_cond, stgd_lock);
            ts = __total_staged();
        }
        mutex_unlock(stgd_lock);

        if (ts > max_staged)
            continue;

        work = make_work();

        if (lagging && !pool_tset(cp, &cp->lagging)) {
            applog(LOG_WARNING, "%s not providing work fast enough", cp->poolname);
            cp->getfail_occasions++;
            total_go++;
        }
        pool = select_pool(lagging);
retry:
        if (pool->has_stratum) {
            while (!pool->stratum_active || !pool->stratum_notify) {
                struct pool *altpool = select_pool(true);

                cgsleep_ms(5000);
                if (altpool != pool) {
                    pool = altpool;
                    goto retry;
                }
            }
            gen_stratum_work(pool, work);
            applog(LOG_DEBUG, "Generated stratum work");
            stage_work(work);
            continue;
        }

        if (opt_benchmark) {
            get_benchmark_work(work);
            applog(LOG_DEBUG, "Generated benchmark work");
            stage_work(work);
            continue;
        }

#ifdef HAVE_LIBCURL
        struct curl_ent *ce;

        if (pool->has_gbt) {
            while (pool->idle) {
                struct pool *altpool = select_pool(true);

                cgsleep_ms(5000);
                if (altpool != pool) {
                    pool = altpool;
                    goto retry;
                }
            }
            gen_gbt_work(pool, work);
            applog(LOG_DEBUG, "Generated GBT work");
            stage_work(work);
            continue;
        }

        if (clone_available()) {
            applog(LOG_DEBUG, "Cloned getwork work");
            free_work(work);
            continue;
        }

        work->pool = pool;
        ce = pop_curl_entry(pool);
        /* obtain new work from bitcoin via JSON-RPC */
        if (!get_upstream_work(work, ce->curl)) {
            applog(LOG_DEBUG, "%s json_rpc_call failed on get work, retrying in 5s", pool->poolname);
            /* Make sure the pool just hasn't stopped serving
             * requests but is up as we'll keep hammering it */
            if (++pool->seq_getfails > mining_threads + opt_queue)
                pool_died(pool);
            cgsleep_ms(5000);
            push_curl_entry(ce, pool);
            pool = select_pool(!opt_fail_only);
            goto retry;
        }
        if (ts >= max_staged)
            pool_tclear(pool, &pool->lagging);
        if (pool_tclear(pool, &pool->idle))
            pool_resus(pool);

        applog(LOG_DEBUG, "Generated getwork work");
        stage_work(work);
        push_curl_entry(ce, pool);
#endif
    }

    return 0;
}