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Add a simple SNDPRIO implemention on req0 #1743

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Add a simple SNDPRIO implemention on req0 #1743

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1507d7c
Update nng.h
hoytluo Dec 26, 2023
1637530
Update sockimpl.h
hoytluo Dec 26, 2023
bf69392
Update dialer.c
hoytluo Dec 26, 2023
0b80991
Update req.c
hoytluo Dec 26, 2023
a00325d
add header file
hoytluo Dec 26, 2023
7a43d2f
add on listener
hoytluo Jan 8, 2024
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1 change: 1 addition & 0 deletions include/nng/nng.h
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Original file line number Diff line number Diff line change
Expand Up @@ -706,6 +706,7 @@ NNG_DECL nng_listener nng_pipe_listener(nng_pipe);
#define NNG_OPT_RECVMAXSZ "recv-size-max"
#define NNG_OPT_RECONNMINT "reconnect-time-min"
#define NNG_OPT_RECONNMAXT "reconnect-time-max"
#define NNG_OPT_SNDPRIO "send-prio"

// TLS options are only used when the underlying transport supports TLS.

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17 changes: 16 additions & 1 deletion src/core/dialer.c
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Expand Up @@ -481,7 +481,15 @@ nni_dialer_setopt(
nni_mtx_unlock(&d->d_mtx);
return (rv);
}
if (strcmp(name, NNG_OPT_SNDPRIO) == 0) {
int rv;

nni_mtx_lock(&d->d_mtx);
rv = nni_copyin_int(&d->d_sndprio, val, sz, 1, 16, t);
nni_mtx_unlock(&d->d_mtx);
return (rv);
}

if (d->d_ops.d_setopt != NULL) {
int rv = d->d_ops.d_setopt(d->d_data, name, val, sz, t);
if (rv != NNG_ENOTSUP) {
Expand Down Expand Up @@ -523,7 +531,14 @@ nni_dialer_getopt(
nni_mtx_unlock(&d->d_mtx);
return (rv);
}

if (strcmp(name, NNG_OPT_SNDPRIO) == 0) {
int rv;
nni_mtx_lock(&d->d_mtx);
rv = nni_copyout_int(d->d_sndprio, valp, szp, t);
nni_mtx_unlock(&d->d_mtx);
return (rv);
}

if (d->d_ops.d_getopt != NULL) {
int rv = d->d_ops.d_getopt(d->d_data, name, valp, szp, t);
if (rv != NNG_ENOTSUP) {
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13 changes: 13 additions & 0 deletions src/core/listener.c
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Original file line number Diff line number Diff line change
Expand Up @@ -434,6 +434,13 @@ nni_listener_setopt(
return (NNG_EREADONLY);
}

if (strcmp(name, NNG_OPT_SNDPRIO) == 0) {
int rv;
rv = nni_copyin_int(&l->l_sndprio, val, sz, 1, 16, t);
return (rv);
}


if (l->l_ops.l_setopt != NULL) {
int rv = l->l_ops.l_setopt(l->l_data, name, val, sz, t);
if (rv != NNG_ENOTSUP) {
Expand Down Expand Up @@ -461,6 +468,12 @@ nni_listener_getopt(
{
nni_option *o;

if (strcmp(name, NNG_OPT_SNDPRIO) == 0) {
int rv;
rv = nni_copyout_int(l->l_sndprio, val, szp, t);
return (rv);
}

if (l->l_ops.l_getopt != NULL) {
int rv = l->l_ops.l_getopt(l->l_data, name, val, szp, t);
if (rv != NNG_ENOTSUP) {
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1 change: 0 additions & 1 deletion src/core/socket.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1504,7 +1504,6 @@ nni_dialer_add_pipe(nni_dialer *d, void *tpipe)
nni_mtx_unlock(&s->s_mx);
return;
}

nni_list_append(&d->d_pipes, p);
nni_list_append(&s->s_pipes, p);
d->d_pipe = p;
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2 changes: 2 additions & 0 deletions src/core/sockimpl.h
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Expand Up @@ -37,6 +37,7 @@ struct nni_dialer {
nni_duration d_currtime; // current time for reconnect
nni_duration d_inirtime; // initial time for reconnect
nni_reap_node d_reap;
int d_sndprio;

#ifdef NNG_ENABLE_STATS
nni_stat_item st_root;
Expand Down Expand Up @@ -73,6 +74,7 @@ struct nni_listener {
nni_aio l_acc_aio;
nni_aio l_tmo_aio;
nni_reap_node l_reap;
int l_sndprio;

#ifdef NNG_ENABLE_STATS
nni_stat_item st_root;
Expand Down
38 changes: 34 additions & 4 deletions src/sp/protocol/reqrep0/req.c
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@

#include "core/nng_impl.h"
#include "nng/protocol/reqrep0/req.h"
#include "core/sockimpl.h"

// Request protocol. The REQ protocol is the "request" side of a
// request-reply pair. This is useful for building RPC clients, for example.
Expand Down Expand Up @@ -76,6 +77,7 @@ struct req0_pipe {
bool closed;
nni_aio aio_send;
nni_aio aio_recv;
int sndprio;
};

static void req0_sock_fini(void *);
Expand Down Expand Up @@ -190,18 +192,45 @@ req0_pipe_init(void *arg, nni_pipe *pipe, void *s)
return (0);
}

static void req0_pipe_insert_by_prio(nni_list *ready_pipes, req0_pipe *p){
req0_pipe *p2 = NULL;
int sndprio = p->sndprio;

if(sndprio < 1){
return nni_list_append(ready_pipes, p);
}

NNI_LIST_FOREACH(ready_pipes, p2) {
if (sndprio > p2->sndprio) {
nni_list_insert_before(ready_pipes, p, p2);
return ;
}
}
if (p2 == NULL) {
nni_list_append(ready_pipes, p);
}
}

static int
req0_pipe_start(void *arg)
{
req0_pipe *p = arg;
req0_sock *s = p->req;

int prio = 0;

if (nni_pipe_peer(p->pipe) != NNG_REQ0_PEER) {
return (NNG_EPROTO);
}

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This option should be a generic option, not just on dialers, but on end points, and then configured on the pipe by the end point.

I also think that we should expand this to RECV priority as well, so that we can use the same option for REP to give preference to some peers. I would like to think on this a bit.

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Hi, in the nanomsg code, I find the ep option when I call the nn_connect function, and then copy the socket option(ep_template) to pipe .
But in the nng code, I can't find the ep . Are the dialer and listener eps? If so, I will add option on the listener also or only add option on the socket, and then copy this option to dialer or listener on creating them.

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I have added SNDPRIO to listener also.

if(p->pipe->p_dialer && nni_dialer_getopt(p->pipe->p_dialer, NNG_OPT_SNDPRIO, &prio, NULL, NNI_TYPE_INT32) == 0 && prio > 0){
// the first time copy sndprio from dialer
p -> sndprio = prio;
}else if(p->pipe->p_listener && nni_listener_getopt(p->pipe->p_listener, NNG_OPT_SNDPRIO, &prio, NULL, NNI_TYPE_INT32) == 0 && prio > 0){
// the first time copy sndprio from listener
p -> sndprio = prio;
}
nni_mtx_lock(&s->mtx);
nni_list_append(&s->ready_pipes, p);
req0_pipe_insert_by_prio(&s->ready_pipes, p);
//nni_list_append(&s->ready_pipes, p);
nni_pollable_raise(&s->writable);
req0_run_send_queue(s, NULL);
nni_mtx_unlock(&s->mtx);
Expand Down Expand Up @@ -294,7 +323,8 @@ req0_send_cb(void *arg)
return;
}
nni_list_remove(&s->busy_pipes, p);
nni_list_append(&s->ready_pipes, p);
req0_pipe_insert_by_prio(&s->ready_pipes, p);
// nni_list_append(&s->ready_pipes, p);
if (nni_list_empty(&s->send_queue)) {
nni_pollable_raise(&s->writable);
}
Expand Down