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208 lines (174 loc) · 5.71 KB
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/*
* Copyright (C) 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JSRetainPtr_h
#define JSRetainPtr_h
#include <JavaScriptCore/JSContextRef.h>
#include <JavaScriptCore/JSStringRef.h>
#include <algorithm>
inline void JSRetain(JSStringRef string) { JSStringRetain(string); }
inline void JSRelease(JSStringRef string) { JSStringRelease(string); }
inline void JSRetain(JSGlobalContextRef context) { JSGlobalContextRetain(context); }
inline void JSRelease(JSGlobalContextRef context) { JSGlobalContextRelease(context); }
enum AdoptTag { Adopt };
template<typename T> class JSRetainPtr {
public:
JSRetainPtr() : m_ptr(0) { }
JSRetainPtr(T ptr) : m_ptr(ptr) { if (ptr) JSRetain(ptr); }
JSRetainPtr(AdoptTag, T ptr) : m_ptr(ptr) { }
JSRetainPtr(const JSRetainPtr&);
template<typename U> JSRetainPtr(const JSRetainPtr<U>&);
~JSRetainPtr();
T get() const { return m_ptr; }
void clear();
T leakRef();
T operator->() const { return m_ptr; }
bool operator!() const { return !m_ptr; }
// This conversion operator allows implicit conversion to bool but not to other integer types.
typedef T JSRetainPtr::*UnspecifiedBoolType;
operator UnspecifiedBoolType() const { return m_ptr ? &JSRetainPtr::m_ptr : 0; }
JSRetainPtr& operator=(const JSRetainPtr&);
template<typename U> JSRetainPtr& operator=(const JSRetainPtr<U>&);
JSRetainPtr& operator=(T);
template<typename U> JSRetainPtr& operator=(U*);
void adopt(T);
void swap(JSRetainPtr&);
private:
T m_ptr;
};
template<typename T> inline JSRetainPtr<T>::JSRetainPtr(const JSRetainPtr& o)
: m_ptr(o.m_ptr)
{
if (m_ptr)
JSRetain(m_ptr);
}
template<typename T> template<typename U> inline JSRetainPtr<T>::JSRetainPtr(const JSRetainPtr<U>& o)
: m_ptr(o.get())
{
if (m_ptr)
JSRetain(m_ptr);
}
template<typename T> inline JSRetainPtr<T>::~JSRetainPtr()
{
if (m_ptr)
JSRelease(m_ptr);
}
template<typename T> inline void JSRetainPtr<T>::clear()
{
if (T ptr = m_ptr) {
m_ptr = 0;
JSRelease(ptr);
}
}
template<typename T> inline T JSRetainPtr<T>::leakRef()
{
T ptr = m_ptr;
m_ptr = 0;
return ptr;
}
template<typename T> inline JSRetainPtr<T>& JSRetainPtr<T>::operator=(const JSRetainPtr<T>& o)
{
T optr = o.get();
if (optr)
JSRetain(optr);
T ptr = m_ptr;
m_ptr = optr;
if (ptr)
JSRelease(ptr);
return *this;
}
template<typename T> template<typename U> inline JSRetainPtr<T>& JSRetainPtr<T>::operator=(const JSRetainPtr<U>& o)
{
T optr = o.get();
if (optr)
JSRetain(optr);
T ptr = m_ptr;
m_ptr = optr;
if (ptr)
JSRelease(ptr);
return *this;
}
template<typename T> inline JSRetainPtr<T>& JSRetainPtr<T>::operator=(T optr)
{
if (optr)
JSRetain(optr);
T ptr = m_ptr;
m_ptr = optr;
if (ptr)
JSRelease(ptr);
return *this;
}
template<typename T> inline void JSRetainPtr<T>::adopt(T optr)
{
T ptr = m_ptr;
m_ptr = optr;
if (ptr)
JSRelease(ptr);
}
template<typename T> template<typename U> inline JSRetainPtr<T>& JSRetainPtr<T>::operator=(U* optr)
{
if (optr)
JSRetain(optr);
T ptr = m_ptr;
m_ptr = optr;
if (ptr)
JSRelease(ptr);
return *this;
}
template<typename T> inline void JSRetainPtr<T>::swap(JSRetainPtr<T>& o)
{
std::swap(m_ptr, o.m_ptr);
}
template<typename T> inline void swap(JSRetainPtr<T>& a, JSRetainPtr<T>& b)
{
a.swap(b);
}
template<typename T, typename U> inline bool operator==(const JSRetainPtr<T>& a, const JSRetainPtr<U>& b)
{
return a.get() == b.get();
}
template<typename T, typename U> inline bool operator==(const JSRetainPtr<T>& a, U* b)
{
return a.get() == b;
}
template<typename T, typename U> inline bool operator==(T* a, const JSRetainPtr<U>& b)
{
return a == b.get();
}
template<typename T, typename U> inline bool operator!=(const JSRetainPtr<T>& a, const JSRetainPtr<U>& b)
{
return a.get() != b.get();
}
template<typename T, typename U> inline bool operator!=(const JSRetainPtr<T>& a, U* b)
{
return a.get() != b;
}
template<typename T, typename U> inline bool operator!=(T* a, const JSRetainPtr<U>& b)
{
return a != b.get();
}
#endif // JSRetainPtr_h