sharedval.h

使用visual studio 2005 开发的开源文件、磁盘加密软件。这是6.1a版。加密自己资料的好工具。也是学习的优秀范本。结成了众多加密算法。

/*
 Copyright (c) 2008 TrueCrypt Foundation. All rights reserved.

 Governed by the TrueCrypt License 2.6 the full text of which is contained
 in the file License.txt included in TrueCrypt binary and source code
 distribution packages.
*/

#ifndef TC_HEADER_Platform_SharedVal
#define TC_HEADER_Platform_SharedVal

#include "PlatformBase.h"
#include "Mutex.h"

namespace TrueCrypt
{
	template <class T>
	class SharedVal
	{
	public:
		SharedVal () { }
		explicit SharedVal (T value) : Value (value) { }
		virtual ~SharedVal () { }

		operator T ()
		{
			return Get ();
		}

		T Decrement ()
		{
			ValMutex.Lock();
			T r = --Value;
			ValMutex.Unlock();
			return r;
		}

		T Get ()
		{
			ValMutex.Lock();
			T r = Value;
			ValMutex.Unlock();
			return r;
		}

		T Increment ()
		{
			ValMutex.Lock();
			T r = ++Value;
			ValMutex.Unlock();
			return r;
		}

		void Set (T value)
		{
			ValMutex.Lock();
			Value = value;
			ValMutex.Unlock();
		}

	protected:
		volatile T Value;
		Mutex ValMutex;

	private:
		SharedVal (const SharedVal &);
		SharedVal &operator= (const SharedVal &);
	};
}

#endif // TC_HEADER_Platform_SharedVal