X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fthread%2Fpthread_mutex_trylock.c;h=2dad7bbf19a9752368d894f35f59a328bfb1d34c;hb=29fae65780f4c5ccda3758828da7a83073297ccc;hp=29268fdb0fa772f02e06dddf51bf00c851bebe88;hpb=e882756311c7b06e59fcc8e582f03852b7dcfd30;p=musl

diff --git a/src/thread/pthread_mutex_trylock.c b/src/thread/pthread_mutex_trylock.c
index 29268fdb..2dad7bbf 100644
--- a/src/thread/pthread_mutex_trylock.c
+++ b/src/thread/pthread_mutex_trylock.c
@@ -2,27 +2,23 @@
 
 int pthread_mutex_trylock(pthread_mutex_t *m)
 {
-	if (m->_m_type == PTHREAD_MUTEX_RECURSIVE) {
-		pthread_t self = pthread_self();
-		if (m->_m_owner == self->tid) {
-			if ((unsigned)m->_m_lock >= INT_MAX) return EAGAIN;
-			a_inc(&m->_m_lock);
-			return 0;
-		}
-		if (a_fetch_add(&m->_m_lock, 1)) {
-			if (a_fetch_add(&m->_m_lock, -1)==1 && m->_m_waiters)
-				__wake(&m->_m_lock, 1, 0);
-			return EBUSY;
-		}
-		m->_m_owner = self->tid;
+	int tid;
+
+	if (m->_m_type == PTHREAD_MUTEX_NORMAL)
+		return -a_xchg(&m->_m_lock, 1) & EBUSY;
+
+	tid = pthread_self()->tid;
+
+	if (m->_m_owner == tid) {
+		if (m->_m_type != PTHREAD_MUTEX_RECURSIVE)
+			return EDEADLK;
+		if ((unsigned)m->_m_count >= INT_MAX) return EAGAIN;
+		m->_m_count++;
 		return 0;
 	}
 
-	if (a_xchg(&m->_m_lock, 1))
-		if (m->_m_type == PTHREAD_MUTEX_ERRORCHECK
-		 && m->_m_owner == pthread_self()->tid) return EDEADLK;
-		else return EBUSY;
-	if (m->_m_type == PTHREAD_MUTEX_ERRORCHECK)
-		m->_m_owner = pthread_self()->tid;
+	if (a_xchg(&m->_m_lock, 1)) return EBUSY;
+	m->_m_owner = tid;
+	m->_m_count = 1;
 	return 0;
 }