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-rw-r--r--src/thread/sem_timedwait.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/thread/sem_timedwait.c b/src/thread/sem_timedwait.c
index e6c2495a..ad3bf075 100644
--- a/src/thread/sem_timedwait.c
+++ b/src/thread/sem_timedwait.c
@@ -8,7 +8,12 @@ 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)+1;
+		if (val==1) __wake(sem->__val, 1, 0);
 		CANCELPT_BEGIN;
+		if (at && at->tv_nsec >= 1000000000UL) {
+			errno = EINVAL;
+			return -1;
+		}
 		if (val <= 0 && __timedwait(sem->__val, val, CLOCK_REALTIME, at, 0) == ETIMEDOUT) {
 			errno = ETIMEDOUT;
 			return -1;