wip simplify gettime

test/gettime_win.c

@@ -1,42 +1,9 @@
 #ifndef CLOCK_REALTIME
 #define CLOCK_REALTIME 2
 #endif
-
-// Number of 100 ns intervals from January 1, 1601 till January 1, 1970.
-#define UNIX_EPOCH 116444736000000000ULL
-
-struct timespec {
-	time_t tv_sec;
-	long   tv_nsec;
-};
-
-static ULARGE_INTEGER
-xgetfiletime (void)
-{
-	ULARGE_INTEGER current_time;
-	FILETIME current_time_ft;
-
-	// Return the current time in UTC as a 64-bit value representing the
-	// number of 100-nanosecond intervals since January 1, 1601.
-	GetSystemTimePreciseAsFileTime(&current_time_ft);
-	current_time.LowPart  = current_time_ft.dwLowDateTime;
-	current_time.HighPart = current_time_ft.dwHighDateTime;
-
-	return current_time;
-}
-
+
 static int
 clock_gettime (const int id, struct timespec* ts)
 {
-	if (id != CLOCK_REALTIME) {
-		return -1;
-	}
-
-	ULARGE_INTEGER current_time = xgetfiletime();
-
-	// Time from Epoch to now.
-	ts->tv_sec  = (current_time.QuadPart - UNIX_EPOCH) / 10000000;
-	ts->tv_nsec = ((current_time.QuadPart - UNIX_EPOCH) % 10000000) * 100;
-
-	return 0;
+	return timespec_get(ts, TIME_UTC) ? 0 : -1;
 }