From ec2e50d0d78fb19c4a0b6f3e1d394408860425b4 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 14 Apr 2011 14:39:57 -0400 Subject: [PATCH] cheap trick to further optimize locking normal mutexes --- src/thread/pthread_mutex_lock.c | 2 +- src/thread/pthread_mutex_trylock.c | 2 +- 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;