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include/platform/thread/mutex.h

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+/* -----------------------------------------------------------------------------
+	GSFramework
+	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
+----------------------------------------------------------------------------- */
+
+
+#ifndef	__NMUTEX__
+#define __NMUTEX__
+
+
+#if		__PLATFORM_POSIX__
+		#include <stdlib.h>
+		#include <pthread.h>
+#elif	__PLATFORM_NINTENDO_WII__
+		#include <revolution.h>
+#endif
+		#include "ntypes.h"
+
+
+namespace GS {
+	namespace Threading {
+
+/// Portable mutex class.
+class	Mutex
+{
+protected:
+
+#if		__PLATFORM_POSIX__
+		pthread_mutex_t	mutex;
+#elif	__PLATFORM_WINDOWS__
+		void		*mutex;
+#elif	__PLATFORM_NINTENDO_WII__
+		OSMutex		mutex;
+#endif
+
+public:
+
+		void		Lock();
+		bool		TryLock();
+		void		Unlock();
+
+		Mutex();
+		~Mutex();
+};
+
+/// Mutex helper class.
+class	MutexLock
+{
+protected:
+
+		Mutex		*mutex;
+
+public:
+
+		bool		HasLock() const
+		{	return asbool(mutex);	}
+
+		void		Lock(Mutex *m, bool try_only)
+		{
+			Unlock();
+
+			if	(try_only)
+			{
+				if	(m && m->TryLock())
+					mutex = m;
+			}
+			else
+			{
+				if	(m)
+					(mutex = m)->Lock();
+			}
+		}
+		void		Unlock()
+		{
+			if	(mutex)
+				mutex->Unlock();
+			mutex = 0;
+		}
+
+		MutexLock(Mutex *m, bool try_only = false) : mutex(0)
+		{	Lock(m, try_only);	}
+		~MutexLock()
+		{	Unlock();	}
+};
+
+	}	// Threading
+}	// GS
+
+
+#endif	// __NMUTEX__