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-rw-r--r--src/thread/pthread_mutex_lock.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/thread/pthread_mutex_lock.c b/src/thread/pthread_mutex_lock.c
index 2b4f3a73..42b5af64 100644
--- a/src/thread/pthread_mutex_lock.c
+++ b/src/thread/pthread_mutex_lock.c
@@ -2,5 +2,8 @@
int pthread_mutex_lock(pthread_mutex_t *m)
{
+ if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_cas(&m->_m_lock, 0, EBUSY))
+ return 0;
+
return pthread_mutex_timedlock(m, 0);
}