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Only wake up writer if the lock is free.

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This commit is contained in:
David Xu 2006-03-25 05:14:21 +00:00
parent 07c7c80074
commit f656ae703e
1 changed files with 2 additions and 2 deletions
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4
lib/libthr/thread/thr_rtld.c
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@ -146,14 +146,14 @@ _thr_rtld_lock_release(void *lock)
if ((l->lock & WAFLAG) == 0) {
atomic_add_rel_int(&l->lock, -RC_INCR);
if (l->wr_waiters) {
if (l->lock == 0 && l->wr_waiters) {
atomic_add_long(&l->wr_cv, 1);
_thr_umtx_wake(&l->wr_cv, l->wr_waiters);
}
THR_CRITICAL_LEAVE(curthread);
} else {
atomic_add_rel_int(&l->lock, -WAFLAG);
if (l->wr_waiters) {
if (l->lock == 0 && l->wr_waiters) {
atomic_add_long(&l->wr_cv, 1);
_thr_umtx_wake(&l->wr_cv, l->wr_waiters);
} else if (l->rd_waiters) {