mirror of
https://github.com/mangosfour/server.git
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289 lines
6.6 KiB
C++
289 lines
6.6 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 __ZTCOUNTEDPTR_H__
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#define __ZTCOUNTEDPTR_H__
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#include <algorithm>
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#include <cassert>
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#include "zthread/AtomicCount.h"
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#ifdef _MSC_VER
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# pragma warning(push)
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# pragma warning(disable:4786) // warning: long template symbol name
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# pragma warning(push)
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# pragma warning(disable:4284) // warning: odd return type for operator->
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#endif
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namespace ZThread {
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/**
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* @class CountedPtr
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*
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* @author Eric Crahen <http://www.code-foo.com/>
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* @date <2003-07-29T06:43:48-0400>
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* @version 2.3.0
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*
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*/
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template <typename T, typename CountT = AtomicCount>
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class CountedPtr {
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#if !defined(__MWERKS__)
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#if !defined(_MSC_VER) || (_MSC_VER > 1200)
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template <typename U, typename V> friend class CountedPtr;
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#endif
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#endif
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CountT* _count;
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T* _instance;
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public:
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CountedPtr() : _count(0), _instance(0) { }
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#if !defined(__MWERKS__)
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#if !defined(_MSC_VER) || (_MSC_VER > 1200)
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explicit CountedPtr(T* raw) : _count(new CountT()), _instance(raw) {
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(*_count)++;
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}
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#endif
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#endif
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template <typename U>
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explicit CountedPtr(U* raw) : _count(new CountT()), _instance(raw) {
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(*_count)++;
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}
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#if !defined(__MWERKS__)
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#if !defined(_MSC_VER) || (_MSC_VER > 1200)
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CountedPtr(const CountedPtr& ptr) : _count(ptr._count), _instance(ptr._instance) {
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if(_count)
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(*_count)++;
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}
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#endif
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#endif
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template <typename U, typename V>
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CountedPtr(const CountedPtr<U, V>& ptr) : _count(ptr._count), _instance(ptr._instance) {
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if(_count)
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(*_count)++;
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}
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~CountedPtr() {
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if(_count && --(*_count) == 0) {
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if(_instance)
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delete _instance;
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delete _count;
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}
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}
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#if !defined(__MWERKS__)
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#if !defined(_MSC_VER) || (_MSC_VER > 1200)
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const CountedPtr& operator=(const CountedPtr& ptr) {
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typedef CountedPtr<T, CountT> ThisT;
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ThisT(ptr).swap(*this);
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return *this;
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}
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#endif
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#endif
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template <typename U, typename V>
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const CountedPtr& operator=(const CountedPtr<U, V>& ptr) {
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typedef CountedPtr<T, CountT> ThisT;
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ThisT(ptr).swap(*this);
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return *this;
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}
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void reset() {
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typedef CountedPtr<T, CountT> ThisT;
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ThisT().swap(*this);
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}
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#if !defined(__MWERKS__)
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#if !defined(_MSC_VER) || (_MSC_VER > 1200)
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void swap(CountedPtr& ptr) {
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std::swap(_count, ptr._count);
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std::swap(_instance, ptr._instance);
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}
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#endif
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#endif
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template <typename U, typename V>
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void swap(CountedPtr<U, V>& ptr) {
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std::swap(_count, ptr._count);
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std::swap(_instance, ptr._instance);
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}
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// Convience operators
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#if !defined(__MWERKS__)
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#if !defined(_MSC_VER) || (_MSC_VER > 1200)
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bool less(const CountedPtr& ptr) const {
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return _instance < ptr._instance;
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}
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#endif
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#endif
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template <typename U, typename V>
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bool less(const CountedPtr<U, V>& ptr) const {
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return _instance < ptr._instance;
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}
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#if !defined(__MWERKS__)
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#if !defined(_MSC_VER) || (_MSC_VER > 1200)
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bool equal(const CountedPtr& ptr) const {
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return _count == ptr._count;
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}
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#endif
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#endif
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template <typename U, typename V>
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bool equal(const CountedPtr<U, V>& ptr) const {
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return _count == ptr._count;
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}
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friend inline bool operator==(const CountedPtr& lhs, const CountedPtr& rhs) {
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return lhs.equal(rhs);
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}
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friend inline bool operator<(const CountedPtr& lhs, const CountedPtr& rhs) {
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return lhs.less(rhs);
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}
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T& operator*() {
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assert(_instance != 0);
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return *_instance;
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}
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T* operator->() {
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assert(_instance != 0);
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return _instance;
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}
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const T* operator->() const {
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assert(_instance != 0);
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return _instance;
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}
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bool operator!() const {
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return _instance == 0;
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}
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operator bool() const {
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return _instance != 0;
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}
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}; /* CountedPtr */
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template<typename U, typename V, typename X, typename Y>
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inline bool operator<(CountedPtr<U, V> const &lhs, CountedPtr<X, Y> const &rhs) {
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return lhs.less(rhs);
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}
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template<typename U, typename V, typename X, typename Y>
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inline bool operator==(CountedPtr<U, V> const &lhs, CountedPtr<X, Y> const &rhs) {
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return lhs.equal(rhs.get);
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}
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template<typename U, typename V, typename X, typename Y>
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inline bool operator!=(CountedPtr<U, V> const &lhs, CountedPtr<X, Y> const &rhs) {
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return !(lhs.equal(rhs.get));
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}
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template<typename U, typename V, typename X, typename Y>
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inline void swap(CountedPtr<U, V> const &lhs, CountedPtr<X, Y> const &rhs) {
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lhs.swap(rhs);
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}
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#if !defined(__MWERKS__)
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#if !defined(_MSC_VER) || (_MSC_VER > 1200)
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template<typename U, typename V>
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inline bool operator<(CountedPtr<U, V> const &lhs, CountedPtr<U, V> const &rhs) {
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return lhs.less(rhs);
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}
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template<typename U, typename V>
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inline bool operator==(CountedPtr<U, V> const &lhs, CountedPtr<U, V> const &rhs) {
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return lhs.equal(rhs.get);
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}
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template<typename U, typename V>
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inline bool operator!=(CountedPtr<U, V> const &lhs, CountedPtr<U, V> const &rhs) {
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return !(lhs.equal(rhs.get));
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}
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template<typename U, typename V>
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inline void swap(CountedPtr<U, V> const &lhs, CountedPtr<U, V> const &rhs) {
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lhs.swap(rhs);
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}
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#endif
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#endif
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} // namespace ZThread
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#ifdef _MSC_VER
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# pragma warning(pop)
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# pragma warning(pop)
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#endif
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#endif // __ZTCOUNTEDPTR_H__
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