From: Rich Felker <dalias@aerifal.cx>
Date: Thu, 17 Mar 2011 17:35:08 +0000 (-0400)
Subject: avoid function call to pthread_self in mutex unlock
X-Git-Tag: v0.7.1~5
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=18c7ea8055cf733f168d2c74d7cc8523a360f5f1;p=oweals%2Fmusl.git

avoid function call to pthread_self in mutex unlock

if the mutex was previously locked, we can assume pthread_self was
already called at the time of locking, and thus that the thread
pointer is initialized.
---

diff --git a/src/thread/pthread_mutex_unlock.c b/src/thread/pthread_mutex_unlock.c
index 61a2b947..3733788d 100644
--- a/src/thread/pthread_mutex_unlock.c
+++ b/src/thread/pthread_mutex_unlock.c
@@ -3,7 +3,7 @@
 int pthread_mutex_unlock(pthread_mutex_t *m)
 {
 	if (m->_m_type != PTHREAD_MUTEX_NORMAL) {
-		if (m->_m_lock != pthread_self()->tid)
+		if (!m->_m_lock || m->_m_lock != __pthread_self()->tid)
 		 	return EPERM;
 		if (m->_m_type == PTHREAD_MUTEX_RECURSIVE && --m->_m_count)
 			return 0;