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If select() is only used for sleep, convert it to nanosleep,

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it only need purely wait in user space.
This commit is contained in:
David Xu 2003-07-03 13:36:29 +00:00
parent e921a3c976
commit f399623004
2 changed files with 18 additions and 8 deletions
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13
lib/libkse/thread/thr_select.c
View file

@ -50,11 +50,16 @@ __select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
struct timeval *timeout)
{
struct pthread *curthread = _get_curthread();
struct timespec ts;
int ret;
_thr_enter_cancellation_point(curthread);
ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
_thr_leave_cancellation_point(curthread);
if (numfds == 0 && timeout != NULL) {
TIMEVAL_TO_TIMESPEC(timeout, &ts);
return nanosleep(&ts, NULL);
} else {
_thr_enter_cancellation_point(curthread);
ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
_thr_leave_cancellation_point(curthread);
}
return ret;
}

13
lib/libpthread/thread/thr_select.c
View file

@ -50,11 +50,16 @@ __select(int numfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
struct timeval *timeout)
{
struct pthread *curthread = _get_curthread();
struct timespec ts;
int ret;
_thr_enter_cancellation_point(curthread);
ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
_thr_leave_cancellation_point(curthread);
if (numfds == 0 && timeout != NULL) {
TIMEVAL_TO_TIMESPEC(timeout, &ts);
return nanosleep(&ts, NULL);
} else {
_thr_enter_cancellation_point(curthread);
ret = __sys_select(numfds, readfds, writefds, exceptfds, timeout);
_thr_leave_cancellation_point(curthread);
}
return ret;
}