From b945eafa126d6a17aa8826a405df7d5d4d999008 Mon Sep 17 00:00:00 2001
From: Alexis211 <alexis211@gmail.com>
Date: Wed, 31 Mar 2010 17:26:21 +0200
Subject: Shared memory segment manager in userland

---
 src/include/mutex.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 src/include/mutex.h

(limited to 'src/include/mutex.h')

diff --git a/src/include/mutex.h b/src/include/mutex.h
new file mode 100644
index 0000000..50b5606
--- /dev/null
+++ b/src/include/mutex.h
@@ -0,0 +1,15 @@
+#ifndef DEF_MUTEX_H
+#define DEF_MUTEX_H
+
+#include <gc/syscall.h>
+
+#define MUTEX_LOCKED 1
+#define MUTEX_UNLOCKED 0
+
+//A mutex is just an uint32_t
+
+void mutex_lock(uint32_t* mutex);	//wait for mutex to be free
+int mutex_lockE(uint32_t* mutex);	//lock mutex only if free, returns !0 if locked, 0 if was busy
+void mutex_unlock(uint32_t* mutex);
+
+#endif
-- 
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