Show shared_ptr.h syntax highlighted
// -*- c-basic-offset: 4 -*-
/*
* This file is part of the KDE libraries
* Copyright (C) 2005 Apple Computer, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef KXMLCORE_SHARED_PTR_H
#define KXMLCORE_SHARED_PTR_H
namespace kxmlcore {
template <class T> class SharedPtr
{
public:
SharedPtr() : m_ptr(0) {}
explicit SharedPtr(T *ptr) : m_ptr(ptr) { if (m_ptr) m_ptr->ref(); }
SharedPtr(const SharedPtr &o) : m_ptr(o.m_ptr) { if (m_ptr) m_ptr->ref(); }
~SharedPtr() { if (m_ptr) m_ptr->deref(); }
template <class U> explicit SharedPtr(SharedPtr<U> o) : m_ptr(o.get()) { if (m_ptr) m_ptr->ref(); }
bool isNull() const { return m_ptr == 0; }
bool notNull() const { return m_ptr != 0; }
void reset() { if (m_ptr) m_ptr->deref(); m_ptr = 0; }
void reset(T *o) { if (o) o->ref(); if (m_ptr) m_ptr->deref(); m_ptr = o; }
T * get() const { return m_ptr; }
T &operator*() const { return *m_ptr; }
T *operator->() const { return m_ptr; }
bool operator!() const { return m_ptr == 0; }
operator bool() const { return m_ptr != 0; }
inline friend bool operator==(const SharedPtr &a, const SharedPtr &b) { return a.m_ptr == b.m_ptr; }
inline friend bool operator==(const SharedPtr &a, const T *b) { return a.m_ptr == b; }
inline friend bool operator==(const T *a, const SharedPtr &b) { return a == b.m_ptr; }
SharedPtr &operator=(const SharedPtr &);
SharedPtr &operator=(T *);
private:
T* m_ptr;
};
template <class T> SharedPtr<T> &SharedPtr<T>::operator=(const SharedPtr<T> &o)
{
if (o.m_ptr)
o.m_ptr->ref();
if (m_ptr)
m_ptr->deref();
m_ptr = o.m_ptr;
return *this;
}
template <class T> inline SharedPtr<T> &SharedPtr<T>::operator=(T *ptr)
{
if (ptr)
ptr->ref();
if (m_ptr)
m_ptr->deref();
m_ptr = ptr;
return *this;
}
template <class T> inline bool operator!=(const SharedPtr<T> &a, const SharedPtr<T> &b) { return !(a==b); }
template <class T> inline bool operator!=(const SharedPtr<T> &a, const T *b) { return !(a == b); }
template <class T> inline bool operator!=(const T *a, const SharedPtr<T> &b) { return !(a == b); }
template <class T, class U> inline SharedPtr<T> static_pointer_cast(const SharedPtr<U> &p) { return SharedPtr<T>(static_cast<T *>(p.get())); }
template <class T, class U> inline SharedPtr<T> const_pointer_cast(const SharedPtr<U> &p) { return SharedPtr<T>(const_cast<T *>(p.get())); }
}
using kxmlcore::SharedPtr;
#endif // KXMLCORE_SHARED_PTR_H
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