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103 lines
2.9 KiB
C++
103 lines
2.9 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 __GUARDEDCLASS_H__
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#define __GUARDEDCLASS_H__
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#include "zthread/Guard.h"
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#include "zthread/Mutex.h"
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namespace ZThread {
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/**
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* @class GuardedClass
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* @author Eric Crahen <http://www.code-foo.com>
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* @date <2003-07-20T20:17:34-0400>
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* @version 2.3.0
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*
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* A simple wrapper template that uses Guard's to provide
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* serialized access to an objects member functions.
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*/
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template <class T, class LockType = Mutex>
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class GuardedClass {
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LockType _lock;
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T* _ptr;
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class TransferedScope {
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public:
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template <class LockType1, class LockType2>
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static void shareScope(LockHolder<LockType1>& l1,
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LockHolder<LockType2>& l2) {
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l1.disable();
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l2.getLock().acquire();
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}
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template <class LockType1>
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static void createScope(LockHolder<LockType1>& l) {
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// Don't acquire the lock when scope the Guard is created
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}
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template <class LockType1>
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static void destroyScope(LockHolder<LockType1>& l) {
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l.getLock().release();
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}
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};
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class Proxy : Guard<LockType, TransferedScope> {
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T* _object;
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public:
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Proxy(LockType& lock, T* object) :
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Guard<LockType, TransferedScope>(lock), _object(object) { }
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T* operator->() {
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return _object;
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}
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};
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GuardedClass();
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GuardedClass& operator=(const GuardedClass&);
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public:
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GuardedClass(T* ptr) : _ptr(ptr) {}
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~GuardedClass() {
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if(_ptr)
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delete _ptr;
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}
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Proxy operator->() {
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Proxy p(_lock, _ptr);
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return p;
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}
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};
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} // namespace ZThread
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#endif // __ZTGUARDEDCLASS_H__
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