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fix off-by-one error in sem_(timed)wait (using old sem value instead of new)

This commit is contained in:
Rich Felker 2011-03-07 18:09:24 -05:00
parent 5fd4a98165
commit 9fe28f703d
1 changed files with 1 additions and 1 deletions
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2
src/thread/sem_timedwait.c
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@ -7,7 +7,7 @@ int sem_timedwait(sem_t *sem, const struct timespec *at)
for (;;) {
if (a_fetch_add(sem->__val, -1) > 0) return 0;
val = a_fetch_add(sem->__val, 1);
val = a_fetch_add(sem->__val, 1)+1;
CANCELPT_BEGIN;
if (val <= 0 && __timedwait(sem->__val, val, CLOCK_REALTIME, at, 0) == ETIMEDOUT) {
errno = ETIMEDOUT;