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-rw-r--r--dep/include/zthread/GuardedClass.h104
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-/*
- * Copyright (c) 2005, Eric Crahen
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is furnished
- * to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-#ifndef __GUARDEDCLASS_H__
-#define __GUARDEDCLASS_H__
-
-#include "zthread/Guard.h"
-#include "zthread/Mutex.h"
-
-namespace ZThread {
-
- /**
- * @class GuardedClass
- * @author Eric Crahen <http://www.code-foo.com>
- * @date <2003-07-20T20:17:34-0400>
- * @version 2.3.0
- *
- * A simple wrapper template that uses Guard's to provide
- * serialized access to an objects member functions.
- */
- template <class T, class LockType = Mutex>
- class GuardedClass {
-
- LockType _lock;
- T* _ptr;
-
- class TransferedScope {
- public:
-
- template <class LockType1, class LockType2>
- static void shareScope(LockHolder<LockType1>& l1,
- LockHolder<LockType2>& l2) {
- l1.disable();
- l2.getLock().acquire();
- }
-
- template <class LockType1>
- static void createScope(LockHolder<LockType1>& l) {
- // Don't acquire the lock when scope the Guard is created
- }
-
- template <class LockType1>
- static void destroyScope(LockHolder<LockType1>& l) {
- l.getLock().release();
- }
-
- };
-
- class Proxy : Guard<LockType, TransferedScope> {
-
- T* _object;
-
- public:
-
- Proxy(LockType& lock, T* object) :
- Guard<LockType, TransferedScope>(lock), _object(object) { }
-
- T* operator->() {
- return _object;
- }
-
- };
-
- GuardedClass();
- GuardedClass& operator=(const GuardedClass&);
-
- public:
-
- GuardedClass(T* ptr) : _ptr(ptr) {}
- ~GuardedClass() {
- if(_ptr)
- delete _ptr;
- }
-
- Proxy operator->() {
- Proxy p(_lock, _ptr);
- return p;
- }
-
- };
-
-} // namespace ZThread
-
-#endif // __ZTGUARDEDCLASS_H__
-