PERFORCE change 65526 for review
David Xu
davidxu at FreeBSD.org
Fri Nov 19 21:01:58 PST 2004
http://perforce.freebsd.org/chv.cgi?CH=65526
Change 65526 by davidxu at davidxu_alona on 2004/11/20 05:00:42
__sys_nanosleep.
Affected files ...
.. //depot/projects/davidxu_thread/src/lib/libthread/thread/thr_nanosleep.c#3 edit
Differences ...
==== //depot/projects/davidxu_thread/src/lib/libthread/thread/thr_nanosleep.c#3 (text+ko) ====
@@ -39,91 +39,22 @@
__weak_reference(__nanosleep, nanosleep);
int
-_nanosleep(const struct timespec *time_to_sleep,
+__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 pthread *curthread = _get_curthread();
+ int ret;
- /* 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(&curthread->wakeup_time, &ts, time_to_sleep);
-
- THR_LOCK_SWITCH(curthread);
- curthread->interrupted = 0;
- THR_SET_STATE(curthread, PS_SLEEP_WAIT);
-
- /* Reschedule the current thread to sleep: */
- _thr_sched_switch_unlocked(curthread);
+ _thr_cancel_enter(curthread);
+ ret = __sys_nanosleep(time_to_sleep, time_remaining);
+ _thr_cancel_leave(curthread, 1);
- /* 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);
}
int
-__nanosleep(const struct timespec *time_to_sleep,
+_nanosleep(const struct timespec *time_to_sleep,
struct timespec *time_remaining)
{
- struct pthread *curthread = _get_curthread();
- int ret;
-
- _thr_cancel_enter(curthread);
- ret = _nanosleep(time_to_sleep, time_remaining);
- _thr_cancel_leave(curthread, 1);
-
- return (ret);
+ return (__sys_nanosleep(time_to_sleep, time_remaining));
}
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