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Diffstat (limited to 'src/thread/pthread_mutex_lock.c')
-rw-r--r--src/thread/pthread_mutex_lock.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/thread/pthread_mutex_lock.c b/src/thread/pthread_mutex_lock.c
index 477b3d80..87b19752 100644
--- a/src/thread/pthread_mutex_lock.c
+++ b/src/thread/pthread_mutex_lock.c
@@ -3,6 +3,10 @@
 int pthread_mutex_lock(pthread_mutex_t *m)
 {
 	int r;
+
+	if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_swap(&m->_m_lock, 1))
+		return 0;
+
 	while ((r=pthread_mutex_trylock(m)) == EBUSY) {
 		if (!(r=m->_m_lock) || (r&0x40000000)) continue;
 		if ((m->_m_type&3) == PTHREAD_MUTEX_ERRORCHECK