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include/raknet/LocklessTypes.hpp

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+/*
+ *  Copyright (c) 2014, Oculus VR, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant 
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+#ifndef __LOCKLESS_TYPES_H
+#define __LOCKLESS_TYPES_H
+
+#include "Export.hpp"
+#include "NativeTypes.hpp"
+#include "WindowsIncludes.hpp"
+#if defined(ANDROID) || defined(__S3E__) || defined(__APPLE__)
+// __sync_fetch_and_add not supported apparently
+#include "SimpleMutex.hpp"
+#endif
+
+namespace RakNet
+{
+
+class RAK_DLL_EXPORT LocklessUint32_t
+{
+public:
+	LocklessUint32_t();
+	explicit LocklessUint32_t(uint32_t initial);
+	// Returns variable value after changing it
+	uint32_t Increment(void);
+	// Returns variable value after changing it
+	uint32_t Decrement(void);
+	uint32_t GetValue(void) const {return value;}
+
+protected:
+#ifdef _WIN32
+	volatile LONG value;
+#elif defined(ANDROID) || defined(__S3E__) || defined(__APPLE__)
+	// __sync_fetch_and_add not supported apparently
+	SimpleMutex mutex;
+	uint32_t value;
+#else
+	volatile uint32_t value;
+#endif
+};
+
+}
+
+#endif