/usr/include/zthread/GuardedClass.h is in libzthread-dev 2.3.2-7ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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__
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