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include/platform/thread/atomic_value.h

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+/* -----------------------------------------------------------------------------
+	GSFramework
+	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
+----------------------------------------------------------------------------- */
+
+
+#ifndef	__ATOMIC_VALUE__
+#define	__ATOMIC_VALUE__
+
+
+namespace GS {
+	namespace Threading {
+
+/*!
+	@short	32bit atomic value.
+	@author	Emmanuel Julien (ejulien@owloh.com)
+*/
+class	Atomic32
+{
+		void		*v;
+
+public:
+
+		/// Perform atomic increment, return the new value.
+		int			Inc();
+		/// Perform atomic decrement, return the new value.
+		int			Dec();
+
+		/// Return the current value.
+		int			Get() const;
+		/// Set new value, return the initial value.
+		int			Set(int);
+
+		/*!
+			@short	Perform an atomic compare and swap operation.
+			Compare the current value with the comparand, if they match set the
+			new value. Return the initial value.
+		*/
+		int			Cas(int comparand, int value);
+
+		explicit Atomic32(int value = 0);
+		~Atomic32();
+};
+
+	}	// Threading
+}	// GS
+
+
+#endif	// __ATOMIC_VALUE__