X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=blobdiff_plain;f=src%2Fthread%2Fpthread_mutex_unlock.c;h=5fc0f4e56be4d2c321cbd0b04afc40c05c25859a;hp=5855db0b588f613803b9000a86edfada657c7d08;hb=da8d0fc4fa3490f418a438b7e0830f9af312d41f;hpb=02084109f0f0d6e0a7fe4a8cb3a90a422725e264

diff --git a/src/thread/pthread_mutex_unlock.c b/src/thread/pthread_mutex_unlock.c
index 5855db0b..5fc0f4e5 100644
--- a/src/thread/pthread_mutex_unlock.c
+++ b/src/thread/pthread_mutex_unlock.c
@@ -1,28 +1,37 @@
 #include "pthread_impl.h"
 
+void __vm_lock_impl(int);
+void __vm_unlock_impl(void);
+
 int pthread_mutex_unlock(pthread_mutex_t *m)
 {
 	pthread_t self;
+	int waiters = m->_m_waiters;
+	int cont;
+	int robust = 0;
 
 	if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
-		self = __pthread_self();
+		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 0;
+			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;
-			a_store(&m->_m_lock, 0);
-			self->robust_list.pending = 0;
-		} else {
-			a_store(&m->_m_lock, 0);
+			__vm_lock_impl(+1);
 		}
-	} else {
-		a_store(&m->_m_lock, 0);
 	}
-
-	if (m->_m_waiters) __wake(&m->_m_lock, 1, 0);
+	cont = a_swap(&m->_m_lock, 0);
+	if (robust) {
+		self->robust_list.pending = 0;
+		__vm_unlock_impl();
+	}
+	if (waiters || cont<0)
+		__wake(&m->_m_lock, 1, 0);
 	return 0;
 }