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Remove in-progress wait code to sync with libpthread's behavior.

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This commit is contained in:
David Xu 2006-01-03 13:30:23 +00:00
parent 8f0d99d790
commit 97986a2ea0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=153987
1 changed files with 8 additions and 30 deletions
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38
lib/libthr/thread/thr_fork.c
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@ -105,10 +105,6 @@ __weak_reference(_fork, fork);
pid_t
_fork(void)
{
static umtx_t inprogress;
static int waiters;
umtx_t tmp;
struct pthread *curthread;
struct pthread_atfork *af;
pid_t ret;
@ -120,25 +116,7 @@ _fork(void)
curthread = _get_curthread();
/*
* Block all signals until we reach a safe point.
*/
_thr_signal_block(curthread);
THR_UMTX_LOCK(curthread, &_thr_atfork_lock);
tmp = inprogress;
while (tmp) {
waiters++;
THR_UMTX_UNLOCK(curthread, &_thr_atfork_lock);
_thr_umtx_wait(&inprogress, tmp, NULL);
THR_UMTX_LOCK(curthread, &_thr_atfork_lock);
waiters--;
tmp = inprogress;
}
inprogress = 1;
/* Unlock mutex, allow new hook to be added during executing hooks. */
THR_UMTX_UNLOCK(curthread, &_thr_atfork_lock);
/* Run down atfork prepare handlers. */
TAILQ_FOREACH_REVERSE(af, &_thr_atfork_list, atfork_head, qe) {
@ -158,11 +136,15 @@ _fork(void)
unlock_malloc = 0;
}
/*
* Block all signals until we reach a safe point.
*/
_thr_signal_block(curthread);
/* Fork a new process: */
if ((ret = __sys_fork()) == 0) {
/* Child process */
errsave = errno;
inprogress = 0;
curthread->cancelflags &= ~THR_CANCEL_NEEDED;
/*
* Thread list will be reinitialized, and later we call
@ -197,22 +179,18 @@ _fork(void)
/* Parent process */
errsave = errno;
if (unlock_malloc)
_spinunlock(__malloc_lock);
/* Ready to continue, unblock signals. */
_thr_signal_unblock(curthread);
if (unlock_malloc)
_spinunlock(__malloc_lock);
/* Run down atfork parent handlers. */
TAILQ_FOREACH(af, &_thr_atfork_list, qe) {
if (af->parent != NULL)
af->parent();
}
THR_UMTX_LOCK(curthread, &_thr_atfork_lock);
inprogress = 0;
if (waiters)
_thr_umtx_wake(&inprogress, waiters);
THR_UMTX_UNLOCK(curthread, &_thr_atfork_lock);
}
errno = errsave;