From 8b0472932c1cb8cb2cc46322b21c0c4e21848522 Mon Sep 17 00:00:00 2001
From: Jens Gustedt <Jens.Gustedt@inria.fr>
Date: Sat, 6 Sep 2014 22:07:22 -0400
Subject: add C11 mutex functions

---
 src/thread/mtx_trylock.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 src/thread/mtx_trylock.c

(limited to 'src/thread/mtx_trylock.c')

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;
+	}
+}
-- 
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