From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/thread/pthread_mutex_unlock.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) create mode 100644 src/thread/pthread_mutex_unlock.c (limited to 'src/thread/pthread_mutex_unlock.c') diff --git a/src/thread/pthread_mutex_unlock.c b/src/thread/pthread_mutex_unlock.c new file mode 100644 index 00000000..23e64ac8 --- /dev/null +++ b/src/thread/pthread_mutex_unlock.c @@ -0,0 +1,19 @@ +#include "pthread_impl.h" + +int pthread_mutex_unlock(pthread_mutex_t *m) +{ + if (m->__type == PTHREAD_MUTEX_RECURSIVE) { + if (a_fetch_add(&m->__lock, -1)==1 && m->__waiters) + __wake(&m->__lock, 1, 0); + return 0; + } + + if (m->__type == PTHREAD_MUTEX_ERRORCHECK + && m->__owner != pthread_self()) + return EPERM; + + m->__owner = 0; + m->__lock = 0; + if (m->__waiters) __wake(&m->__lock, 1, 0); + return 0; +} -- cgit v1.2.1