From fda9416cc8b64fa7371b7a9989def9cc318efc7e Mon Sep 17 00:00:00 2001
From: Alejandro Marzini
Date: Sat, 3 Jul 2010 00:13:45 +0000
Subject: Cleanup and documentation.

svn-id: r50609
---
 backends/mutex/null/null-mutex.h | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

(limited to 'backends/mutex/null')

diff --git a/backends/mutex/null/null-mutex.h b/backends/mutex/null/null-mutex.h
index ddfe23bdee..54b8f5ce96 100644
--- a/backends/mutex/null/null-mutex.h
+++ b/backends/mutex/null/null-mutex.h
@@ -28,12 +28,15 @@
 
 #include "backends/mutex/mutex.h"
 
+/**
+ * Null mutex manager
+ */
 class NullMutexManager : MutexManager {
 public:
-	OSystem::MutexRef createMutex() { return OSystem::MutexRef(); }
-	void lockMutex(OSystem::MutexRef mutex) {}
-	void unlockMutex(OSystem::MutexRef mutex) {}
-	void deleteMutex(OSystem::MutexRef mutex) {}
+	virtual OSystem::MutexRef createMutex() { return OSystem::MutexRef(); }
+	virtual void lockMutex(OSystem::MutexRef mutex) {}
+	virtual void unlockMutex(OSystem::MutexRef mutex) {}
+	virtual void deleteMutex(OSystem::MutexRef mutex) {}
 };
 
 #endif
-- 
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