mirror of
https://github.com/mangosfour/server.git
synced 2025-12-18 19:37:01 +00:00
99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
/*
|
|
* 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 __ZTINTRUSIVEPTR_H__
|
|
#define __ZTINTRUSIVEPTR_H__
|
|
|
|
#include "zthread/Guard.h"
|
|
#include <cstdlib>
|
|
|
|
namespace ZThread {
|
|
|
|
/**
|
|
* @class IntrusivePtr
|
|
* @author Eric Crahen <http://www.code-foo.com>
|
|
* @date <2003-07-16T17:54:23-0400>
|
|
* @version 2.2.0
|
|
*
|
|
* This template creates an intrusively reference counted object
|
|
* an IntrusivePtr starts out with a 1 count, which is updated as references are
|
|
* added and removed. When the reference count drops to 0, the
|
|
* IntrusivePtr will delete itself.
|
|
*/
|
|
template <typename T, class LockType>
|
|
class IntrusivePtr : NonCopyable {
|
|
|
|
//! Intrusive reference count
|
|
size_t _count;
|
|
|
|
//! Synchornization object
|
|
LockType _lock;
|
|
|
|
public:
|
|
|
|
/**
|
|
* Create an IntrusivePtr with a count.
|
|
*/
|
|
IntrusivePtr(size_t InitialCount=1) : _count(InitialCount) { }
|
|
|
|
/**
|
|
* Destroy an IntrusivePtr
|
|
*/
|
|
virtual ~IntrusivePtr() {}
|
|
|
|
/**
|
|
* Add a reference to this object, it will take one more
|
|
* call to delReference() for it to be deleted.
|
|
*/
|
|
void addReference() {
|
|
|
|
Guard<LockType, LockedScope> g(_lock);
|
|
_count++;
|
|
|
|
}
|
|
|
|
/**
|
|
* Remove a reference from this object, if the reference count
|
|
* drops to 0 as a result, the object deletes itself.
|
|
*/
|
|
void delReference() {
|
|
|
|
bool result = false;
|
|
|
|
{
|
|
|
|
Guard<LockType, LockedScope> g(_lock);
|
|
result = (--_count == 0);
|
|
|
|
}
|
|
|
|
if(result)
|
|
delete this;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
};
|
|
|
|
#endif
|