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74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
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* Copyright (c) 2005, Eric Crahen
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef __ZTATOMICCOUNT_H__
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#define __ZTATOMICCOUNT_H__
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#include <cstdlib>
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#include "zthread/Config.h"
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#include "zthread/NonCopyable.h"
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namespace ZThread {
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/**
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* @class AtomicCount
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* @author Eric Crahen <http://www.code-foo.com>
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* @date <2003-07-16T09:41:55-0400>
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* @version 2.3.0
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*
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* This class provides an interface to a small integer whose value can be
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* incremented or decremented atomically. It's designed to be as simple and
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* lightweight as possible so that it can be used cheaply to create reference
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* counts.
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*/
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class ZTHREAD_API AtomicCount : public NonCopyable {
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void* _value;
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public:
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//! Create a new AtomicCount, initialized to a value of 1
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AtomicCount();
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//! Destroy a new AtomicCount
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~AtomicCount();
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//! Postfix decrement and return the current value
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size_t operator--(int);
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//! Postfix increment and return the current value
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size_t operator++(int);
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//! Prefix decrement and return the current value
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size_t operator--();
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//! Prefix increment and return the current value
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size_t operator++();
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}; /* AtomicCount */
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} // namespace ZThread
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#endif // __ZTATOMICCOUNT_H__
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