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_rwlock_trywrlock.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) create mode 100644 src/thread/pthread_rwlock_trywrlock.c (limited to 'src/thread/pthread_rwlock_trywrlock.c') diff --git a/src/thread/pthread_rwlock_trywrlock.c b/src/thread/pthread_rwlock_trywrlock.c new file mode 100644 index 00000000..c029b874 --- /dev/null +++ b/src/thread/pthread_rwlock_trywrlock.c @@ -0,0 +1,13 @@ +#include "pthread_impl.h" + +int pthread_rwlock_trywrlock(pthread_rwlock_t *rw) +{ + if (a_xchg(&rw->__wrlock, 1)) + return EAGAIN; + if (rw->__readers) { + a_store(&rw->__wrlock, 0); + return EAGAIN; + } + rw->__owner = pthread_self()->tid; + return 0; +} -- cgit v1.2.1