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* check for null pointer in mutex wake waiters function

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This commit is contained in:
Oliver Hahm 2010-11-01 13:29:40 +01:00
parent 13b651ee86
commit 5b3209ea19
1 changed files with 7 additions and 0 deletions
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7
core/mutex.c
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@ -103,6 +103,13 @@ void mutex_wake_waiters(struct mutex_t *mutex, int flags) {
DEBUG("%s: waking up waiters.\n", active_thread->name);
queue_node_t *next = queue_remove_head(&(mutex->queue));
/* queue is empty */
if (!next) {
mutex->val = 0;
return;
}
tcb* process = (tcb*)next->data;
sched_set_status(process, STATUS_PENDING);