From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001
From: Vladimir Azarov <avm@intermediate-node.net>
Date: Tue, 1 Oct 2024 15:47:05 +0200
Subject: Initial version

---
 src/thread/mtx_lock.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 src/thread/mtx_lock.c

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

diff --git a/src/thread/mtx_lock.c b/src/thread/mtx_lock.c
new file mode 100644
index 0000000..5c2415c
--- /dev/null
+++ b/src/thread/mtx_lock.c
@@ -0,0 +1,12 @@
+#include "pthread_impl.h"
+#include <threads.h>
+
+int mtx_lock(mtx_t *m)
+{
+	if (m->_m_type == PTHREAD_MUTEX_NORMAL && !a_cas(&m->_m_lock, 0, EBUSY))
+		return thrd_success;
+	/* Calling mtx_timedlock with a null pointer is an extension.
+	 * It is convenient, here to avoid duplication of the logic
+	 * for return values. */
+	return mtx_timedlock(m, 0);
+}
-- 
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