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authorrpj <rpj>2006-12-22 02:36:40 +0000
committerrpj <rpj>2006-12-22 02:36:40 +0000
commit9e61bc0571b4812381cf89dd6f4bcbe3931f6acd (patch)
tree2b60eec9340369ed259a9d1de422ac5ec3eb9291 /sem_trywait.c
parent1beb00e609d241ee6c2048c476e2240f05033cbd (diff)
Diffstat (limited to 'sem_trywait.c')
-rw-r--r--sem_trywait.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/sem_trywait.c b/sem_trywait.c
index 4d1451d..63614ba 100644
--- a/sem_trywait.c
+++ b/sem_trywait.c
@@ -85,6 +85,15 @@ sem_trywait (sem_t * sem)
}
else if ((result = pthread_mutex_lock (&s->lock)) == 0)
{
+ /* See sem_destroy.c
+ */
+ if (*sem == NULL)
+ {
+ (void) pthread_mutex_unlock (&s->lock);
+ errno = EINVAL;
+ return -1;
+ }
+
if (s->value > 0)
{
s->value--;