X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=blobdiff_plain;f=src%2Fthread%2Fpthread_mutex_unlock.c;h=fdf9fc103ffd857c69c93658265fe86e006a01d9;hp=0275eb52e6e6a5e93f34a2037e601dbbaaccdfac;hb=e7655ed37bc9c2d79d921af4f287ee5cf2788661;hpb=e882756311c7b06e59fcc8e582f03852b7dcfd30

diff --git a/src/thread/pthread_mutex_unlock.c b/src/thread/pthread_mutex_unlock.c
index 0275eb52..fdf9fc10 100644
--- a/src/thread/pthread_mutex_unlock.c
+++ b/src/thread/pthread_mutex_unlock.c
@@ -2,18 +2,30 @@
 
 int pthread_mutex_unlock(pthread_mutex_t *m)
 {
-	if (m->_m_type == PTHREAD_MUTEX_RECURSIVE) {
-		if (a_fetch_add(&m->_m_lock, -1)==1 && m->_m_waiters)
-			__wake(&m->_m_lock, 1, 0);
-		return 0;
-	}
-
-	if (m->_m_type == PTHREAD_MUTEX_ERRORCHECK
-	 && m->_m_owner != pthread_self()->tid)
-	 	return EPERM;
+	pthread_t self;
+	int waiters = m->_m_waiters;
+	int cont;
+	int robust = 0;
 
-	m->_m_owner = 0;
-	m->_m_lock = 0;
-	if (m->_m_waiters) __wake(&m->_m_lock, 1, 0);
+	if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
+		if (!m->_m_lock)
+			return EPERM;
+		self = pthread_self();
+		if ((m->_m_lock&0x1fffffff) != self->tid)
+			return EPERM;
+		if ((m->_m_type&3) == PTHREAD_MUTEX_RECURSIVE && m->_m_count)
+			return m->_m_count--, 0;
+		if (m->_m_type >= 4) {
+			robust = 1;
+			self->robust_list.pending = &m->_m_next;
+			*(void **)m->_m_prev = m->_m_next;
+			if (m->_m_next) ((void **)m->_m_next)[-1] = m->_m_prev;
+		}
+	}
+	cont = a_swap(&m->_m_lock, 0);
+	if (robust)
+		self->robust_list.pending = 0;
+	if (waiters || cont<0)
+		__wake(&m->_m_lock, 1, 0);
 	return 0;
 }