diff options
Diffstat (limited to 'pthread_mutex_lock.c')
| -rw-r--r-- | pthread_mutex_lock.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/pthread_mutex_lock.c b/pthread_mutex_lock.c index 301f7bf..4ca5c25 100644 --- a/pthread_mutex_lock.c +++ b/pthread_mutex_lock.c @@ -49,6 +49,10 @@ pthread_mutex_lock (pthread_mutex_t * mutex) /* * Let the system deal with invalid pointers. */ + if (*mutex == NULL) + { + return EINVAL; + } /* * We do a quick check to see if we need to do more work |