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TIMER: Fix overflow error in sim_idle_ms_sleep() timespec tv_nsec field

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Backed out commit 484889ea5a since the overflow of the timespec tv_nsec
field was the real cause of the problem.  No need for an extra mutex.

As reported in #595
This commit is contained in:
Mark Pizzolato 2018-07-15 10:11:14 -07:00
parent 9e60a8e783
commit 97bee79faa
3 changed files with 6 additions and 19 deletions
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1
scp.c
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@ -326,7 +326,6 @@
#if defined (SIM_ASYNCH_IO)
pthread_mutex_t sim_asynch_lock = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t sim_asynch_wake = PTHREAD_COND_INITIALIZER;
pthread_mutex_t sim_idle_lock = PTHREAD_MUTEX_INITIALIZER;
pthread_mutex_t sim_timer_lock = PTHREAD_MUTEX_INITIALIZER;
pthread_cond_t sim_timer_wake = PTHREAD_COND_INITIALIZER;

3
sim_defs.h
View file

@ -1063,7 +1063,6 @@ struct MEMFILE {
extern pthread_mutex_t sim_asynch_lock;
extern pthread_cond_t sim_asynch_wake;
extern pthread_mutex_t sim_idle_lock;
extern pthread_mutex_t sim_timer_lock;
extern pthread_cond_t sim_timer_wake;
extern t_bool sim_timer_event_canceled;
@ -1176,7 +1175,6 @@ extern int32 sim_asynch_inst_latency;
do { \
pthread_mutex_destroy(&sim_asynch_lock); \
pthread_cond_destroy(&sim_asynch_wake); \
pthread_mutex_destroy(&sim_idle_lock); \
pthread_mutex_destroy(&sim_timer_lock); \
pthread_cond_destroy(&sim_timer_wake); \
pthread_mutex_destroy(&sim_tmxr_poll_lock); \
@ -1226,7 +1224,6 @@ extern int32 sim_asynch_inst_latency;
do { \
pthread_mutex_destroy(&sim_asynch_lock); \
pthread_cond_destroy(&sim_asynch_wake); \
pthread_mutex_destroy(&sim_idle_lock); \
pthread_mutex_destroy(&sim_timer_lock); \
pthread_cond_destroy(&sim_timer_wake); \
pthread_mutex_destroy(&sim_tmxr_poll_lock); \

21
sim_timer.c
View file

@ -244,27 +244,18 @@ int stat;
clock_gettime(CLOCK_REALTIME, &done_time);
done_time.tv_sec += (msec/1000);
done_time.tv_nsec += 1000000*(msec%1000);
if (done_time.tv_nsec > 1000000000) {
if (done_time.tv_nsec >= 1000000000) {
done_time.tv_sec += done_time.tv_nsec/1000000000;
done_time.tv_nsec = done_time.tv_nsec%1000000000;
}
pthread_mutex_lock (&sim_idle_lock);
pthread_mutex_lock (&sim_asynch_lock);
sim_idle_wait = TRUE;
stat = pthread_cond_timedwait (&sim_asynch_wake, &sim_idle_lock, &done_time);
if (stat == 0)
sim_asynch_check = 0; /* force check of asynch queue now */
else
if (stat == ETIMEDOUT)
if (pthread_cond_timedwait (&sim_asynch_wake, &sim_asynch_lock, &done_time))
timedout = TRUE;
else {
char ans[32];
fprintf (stderr, "sim_idle_ms_sleep(%u): pthread_cond_timedwait() return %d - %s\r\n", msec, stat, strerror (stat));
read_line_p ("Hit Return to exit: ", ans, sizeof (ans) - 1, stdin);
abort ();
}
else
sim_asynch_check = 0; /* force check of asynch queue now */
sim_idle_wait = FALSE;
pthread_mutex_unlock (&sim_idle_lock);
pthread_mutex_unlock (&sim_asynch_lock);
if (!timedout) {
AIO_UPDATE_QUEUE;
}