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-rw-r--r--src/thread/pthread_mutex_lock.c2
-rw-r--r--src/thread/pthread_mutex_trylock.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/src/thread/pthread_mutex_lock.c b/src/thread/pthread_mutex_lock.c
index 87b19752..99c15bd8 100644
--- a/src/thread/pthread_mutex_lock.c
+++ b/src/thread/pthread_mutex_lock.c
@@ -4,7 +4,7 @@ int pthread_mutex_lock(pthread_mutex_t *m)
 {
 	int r;
 
-	if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_swap(&m->_m_lock, 1))
+	if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_swap(&m->_m_lock, EBUSY))
 		return 0;
 
 	while ((r=pthread_mutex_trylock(m)) == EBUSY) {
diff --git a/src/thread/pthread_mutex_trylock.c b/src/thread/pthread_mutex_trylock.c
index 50a815a5..ea1fa805 100644
--- a/src/thread/pthread_mutex_trylock.c
+++ b/src/thread/pthread_mutex_trylock.c
@@ -7,7 +7,7 @@ int pthread_mutex_trylock(pthread_mutex_t *m)
 	pthread_t self;
 
 	if (m->_m_type == PTHREAD_MUTEX_NORMAL)
-		return -a_swap(&m->_m_lock, 1) & EBUSY;
+		return a_swap(&m->_m_lock, EBUSY);
 
 	self = pthread_self();
 	tid = self->tid | 0x80000000;