diff options
Diffstat (limited to 'ptw32_semwait.c')
| -rw-r--r-- | ptw32_semwait.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/ptw32_semwait.c b/ptw32_semwait.c index 8b23d11..111cb80 100644 --- a/ptw32_semwait.c +++ b/ptw32_semwait.c @@ -77,8 +77,18 @@ ptw32_semwait (sem_t * sem) { if ((result = pthread_mutex_lock (&s->lock)) == 0) { - int v = --s->value; + int v; + /* See sem_destroy.c + */ + if (*sem == NULL) + { + (void) pthread_mutex_unlock (&s->lock); + errno = EINVAL; + return -1; + } + + v = --s->value; (void) pthread_mutex_unlock (&s->lock); if (v < 0) @@ -89,6 +99,13 @@ ptw32_semwait (sem_t * sem) #ifdef NEED_SEM if (pthread_mutex_lock (&s->lock) == 0) { + if (*sem == NULL) + { + (void) pthread_mutex_unlock (&s->lock); + errno = EINVAL; + return -1; + } + if (s->leftToUnblock > 0) { --s->leftToUnblock; |