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authorJens Gustedt <Jens.Gustedt@inria.fr>2014-09-06 22:07:22 -0400
committerRich Felker <dalias@aerifal.cx>2014-09-06 22:07:22 -0400
commit8b0472932c1cb8cb2cc46322b21c0c4e21848522 (patch)
treea2c72eb0d39458bd87c4dc8b4810813d1b8a1819 /src/thread/mtx_trylock.c
parente16f70f45210294321a88f23c85ac45046577adc (diff)
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add C11 mutex functions
Diffstat (limited to 'src/thread/mtx_trylock.c')
-rw-r--r--src/thread/mtx_trylock.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/src/thread/mtx_trylock.c b/src/thread/mtx_trylock.c
new file mode 100644
index 00000000..61e7694e
--- /dev/null
+++ b/src/thread/mtx_trylock.c
@@ -0,0 +1,17 @@
+#include "pthread_impl.h"
+#include <threads.h>
+
+int __pthread_mutex_trylock(mtx_t *);
+
+int mtx_trylock(mtx_t *m)
+{
+ if (m->_m_type == PTHREAD_MUTEX_NORMAL)
+ return (a_cas(&m->_m_lock, 0, EBUSY) & EBUSY) ? thrd_busy : thrd_success;
+
+ int ret = __pthread_mutex_trylock(m);
+ switch (ret) {
+ default: return thrd_error;
+ case 0: return thrd_success;
+ case EBUSY: return thrd_busy;
+ }
+}