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Diffstat (limited to 'src/3rdparty/webkit/JavaScriptCore/wtf/RetainPtr.h')
| -rw-r--r-- | src/3rdparty/webkit/JavaScriptCore/wtf/RetainPtr.h | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/JavaScriptCore/wtf/RetainPtr.h b/src/3rdparty/webkit/JavaScriptCore/wtf/RetainPtr.h new file mode 100644 index 0000000..a66a127 --- /dev/null +++ b/src/3rdparty/webkit/JavaScriptCore/wtf/RetainPtr.h @@ -0,0 +1,210 @@ +/* + * Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. + * + * 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 Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#ifndef RetainPtr_h +#define RetainPtr_h + +#include <algorithm> +#include <CoreFoundation/CoreFoundation.h> + +#ifdef __OBJC__ +#import <Foundation/Foundation.h> +#endif + +namespace WTF { + + template <typename T> struct RemovePointer { + typedef T type; + }; + + template <typename T> struct RemovePointer<T*> { + typedef T type; + }; + + // Unlike most most of our smart pointers, RetainPtr can take either the pointer type or the pointed-to type, + // so both RetainPtr<NSDictionary> and RetainPtr<CFDictionaryRef> will work. + + enum AdoptCFTag { AdoptCF }; + enum AdoptNSTag { AdoptNS }; + +#ifdef __OBJC__ + inline void adoptNSReference(id ptr) + { + if (ptr) { + CFRetain(ptr); + [ptr release]; + } + } +#endif + + template <typename T> class RetainPtr { + public: + typedef typename RemovePointer<T>::type ValueType; + typedef ValueType* PtrType; + + RetainPtr() : m_ptr(0) {} + RetainPtr(PtrType ptr) : m_ptr(ptr) { if (ptr) CFRetain(ptr); } + + RetainPtr(AdoptCFTag, PtrType ptr) : m_ptr(ptr) { } + RetainPtr(AdoptNSTag, PtrType ptr) : m_ptr(ptr) { adoptNSReference(ptr); } + + RetainPtr(const RetainPtr& o) : m_ptr(o.m_ptr) { if (PtrType ptr = m_ptr) CFRetain(ptr); } + + ~RetainPtr() { if (PtrType ptr = m_ptr) CFRelease(ptr); } + + template <typename U> RetainPtr(const RetainPtr<U>& o) : m_ptr(o.get()) { if (PtrType ptr = m_ptr) CFRetain(ptr); } + + PtrType get() const { return m_ptr; } + + PtrType releaseRef() { PtrType tmp = m_ptr; m_ptr = 0; return tmp; } + + PtrType 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 PtrType RetainPtr::*UnspecifiedBoolType; + operator UnspecifiedBoolType() const { return m_ptr ? &RetainPtr::m_ptr : 0; } + + RetainPtr& operator=(const RetainPtr&); + template <typename U> RetainPtr& operator=(const RetainPtr<U>&); + RetainPtr& operator=(PtrType); + template <typename U> RetainPtr& operator=(U*); + + void adoptCF(PtrType); + void adoptNS(PtrType); + + void swap(RetainPtr&); + + private: + PtrType m_ptr; + }; + + template <typename T> inline RetainPtr<T>& RetainPtr<T>::operator=(const RetainPtr<T>& o) + { + PtrType optr = o.get(); + if (optr) + CFRetain(optr); + PtrType ptr = m_ptr; + m_ptr = optr; + if (ptr) + CFRelease(ptr); + return *this; + } + + template <typename T> template <typename U> inline RetainPtr<T>& RetainPtr<T>::operator=(const RetainPtr<U>& o) + { + PtrType optr = o.get(); + if (optr) + CFRetain(optr); + PtrType ptr = m_ptr; + m_ptr = optr; + if (ptr) + CFRelease(ptr); + return *this; + } + + template <typename T> inline RetainPtr<T>& RetainPtr<T>::operator=(PtrType optr) + { + if (optr) + CFRetain(optr); + PtrType ptr = m_ptr; + m_ptr = optr; + if (ptr) + CFRelease(ptr); + return *this; + } + + template <typename T> inline void RetainPtr<T>::adoptCF(PtrType optr) + { + PtrType ptr = m_ptr; + m_ptr = optr; + if (ptr) + CFRelease(ptr); + } + + template <typename T> inline void RetainPtr<T>::adoptNS(PtrType optr) + { + adoptNSReference(optr); + + PtrType ptr = m_ptr; + m_ptr = optr; + if (ptr) + CFRelease(ptr); + } + + template <typename T> template <typename U> inline RetainPtr<T>& RetainPtr<T>::operator=(U* optr) + { + if (optr) + CFRetain(optr); + PtrType ptr = m_ptr; + m_ptr = optr; + if (ptr) + CFRelease(ptr); + return *this; + } + + template <class T> inline void RetainPtr<T>::swap(RetainPtr<T>& o) + { + std::swap(m_ptr, o.m_ptr); + } + + template <class T> inline void swap(RetainPtr<T>& a, RetainPtr<T>& b) + { + a.swap(b); + } + + template <typename T, typename U> inline bool operator==(const RetainPtr<T>& a, const RetainPtr<U>& b) + { + return a.get() == b.get(); + } + + template <typename T, typename U> inline bool operator==(const RetainPtr<T>& a, U* b) + { + return a.get() == b; + } + + template <typename T, typename U> inline bool operator==(T* a, const RetainPtr<U>& b) + { + return a == b.get(); + } + + template <typename T, typename U> inline bool operator!=(const RetainPtr<T>& a, const RetainPtr<U>& b) + { + return a.get() != b.get(); + } + + template <typename T, typename U> inline bool operator!=(const RetainPtr<T>& a, U* b) + { + return a.get() != b; + } + + template <typename T, typename U> inline bool operator!=(T* a, const RetainPtr<U>& b) + { + return a != b.get(); + } + +} // namespace WTF + +using WTF::AdoptCF; +using WTF::AdoptNS; +using WTF::RetainPtr; + +#endif // WTF_RetainPtr_h |