int
_sigsuspend(const sigset_t *set)
{
struct pthread *curthread = _get_curthread();
sigset_t oldmask, newmask, tempset;
int ret = -1;
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
return (__sys_sigsuspend(set));
/* Check if a new signal set was provided by the caller: */
if (set != NULL) {
newmask = *set;
SIG_CANTMASK(newmask);
THR_LOCK_SWITCH(curthread);
/* Save current sigmask: */
oldmask = curthread->sigmask;
curthread->oldsigmask = &oldmask;
/* Change the caller's mask: */
curthread->sigmask = newmask;
tempset = curthread->sigpend;
SIGSETNAND(tempset, newmask);
if (SIGISEMPTY(tempset)) {
THR_SET_STATE(curthread, PS_SIGSUSPEND);
/* Wait for a signal: */
_thr_sched_switch_unlocked(curthread);
} else {
curthread->check_pending = 1;
THR_UNLOCK_SWITCH(curthread);
/* check pending signal I can handle: */
_thr_sig_check_pending(curthread);
}
if ((curthread->cancelflags & THR_CANCELLING) != 0)
curthread->oldsigmask = NULL;
else {
THR_ASSERT(curthread->oldsigmask == NULL,
"oldsigmask is not cleared");
}
/* Always return an interrupted error: */
errno = EINTR;
} else {
/* Return an invalid argument error: */
errno = EINVAL;
}
/* Return the completion status: */
return (ret);
}
int
_nanosleep(const struct timespec *time_to_sleep,
struct timespec *time_remaining)
{
struct pthread *curthread = _get_curthread();
int ret = 0;
struct timespec ts, ts1;
struct timespec remaining_time;
struct timespec wakeup_time;
/* Check if the time to sleep is legal: */
if ((time_to_sleep == NULL) || (time_to_sleep->tv_sec < 0) ||
(time_to_sleep->tv_nsec < 0) ||
(time_to_sleep->tv_nsec >= 1000000000)) {
/* Return an EINVAL error : */
errno = EINVAL;
ret = -1;
} else {
if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
return (__sys_nanosleep(time_to_sleep, time_remaining));
KSE_GET_TOD(curthread->kse, &ts);
/* Calculate the time for the current thread to wake up: */
TIMESPEC_ADD(&wakeup_time, &ts, time_to_sleep);
THR_LOCK_SWITCH(curthread);
curthread->interrupted = 0;
curthread->wakeup_time = wakeup_time;
THR_SET_STATE(curthread, PS_SLEEP_WAIT);
/* Reschedule the current thread to sleep: */
_thr_sched_switch_unlocked(curthread);
/* Calculate the remaining time to sleep: */
KSE_GET_TOD(curthread->kse, &ts1);
remaining_time.tv_sec = time_to_sleep->tv_sec
+ ts.tv_sec - ts1.tv_sec;
remaining_time.tv_nsec = time_to_sleep->tv_nsec
+ ts.tv_nsec - ts1.tv_nsec;
/* Check if the nanosecond field has underflowed: */
if (remaining_time.tv_nsec < 0) {
/* Handle the underflow: */
remaining_time.tv_sec -= 1;
remaining_time.tv_nsec += 1000000000;
}
/* Check if the nanosecond field has overflowed: */
else if (remaining_time.tv_nsec >= 1000000000) {
/* Handle the overflow: */
remaining_time.tv_sec += 1;
remaining_time.tv_nsec -= 1000000000;
}
/* Check if the sleep was longer than the required time: */
if (remaining_time.tv_sec < 0) {
/* Reset the time left: */
remaining_time.tv_sec = 0;
remaining_time.tv_nsec = 0;
}
/* Check if the time remaining is to be returned: */
if (time_remaining != NULL) {
/* Return the actual time slept: */
time_remaining->tv_sec = remaining_time.tv_sec;
time_remaining->tv_nsec = remaining_time.tv_nsec;
}
/* Check if the sleep was interrupted: */
if (curthread->interrupted) {
/* Return an EINTR error : */
errno = EINTR;
ret = -1;
}
}
return (ret);
}
