Move Source/WTF/wtf to Source/wtf

Source/WTF/wtf/RefPtr.h

-/*
- *  Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 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.
- *
- */
-
-// RefPtr and PassRefPtr are documented at http://webkit.org/coding/RefPtr.html
-
-#ifndef WTF_RefPtr_h
-#define WTF_RefPtr_h
-
-#include <algorithm>
-#include <wtf/FastAllocBase.h>
-#include <wtf/PassRefPtr.h>
-
-namespace WTF {
-
-    enum PlacementNewAdoptType { PlacementNewAdopt };
-
-    template<typename T> class PassRefPtr;
-
-    enum HashTableDeletedValueType { HashTableDeletedValue };
-
-    template<typename T> class RefPtr {
-        WTF_MAKE_FAST_ALLOCATED;
-    public:
-        ALWAYS_INLINE RefPtr() : m_ptr(0) { }
-        ALWAYS_INLINE RefPtr(T* ptr) : m_ptr(ptr) { refIfNotNull(ptr); }
-        ALWAYS_INLINE RefPtr(const RefPtr& o) : m_ptr(o.m_ptr) { refIfNotNull(m_ptr); }
-        template<typename U> RefPtr(const RefPtr<U>& o) : m_ptr(o.get()) { refIfNotNull(m_ptr); }
-
-        // See comments in PassRefPtr.h for an explanation of why this takes a const reference.
-        template<typename U> RefPtr(const PassRefPtr<U>&);
-
-        // Special constructor for cases where we overwrite an object in place.
-        ALWAYS_INLINE RefPtr(PlacementNewAdoptType) { }
-
-        // Hash table deleted values, which are only constructed and never copied or destroyed.
-        RefPtr(HashTableDeletedValueType) : m_ptr(hashTableDeletedValue()) { }
-        bool isHashTableDeletedValue() const { return m_ptr == hashTableDeletedValue(); }
-
-        ALWAYS_INLINE ~RefPtr() { derefIfNotNull(m_ptr); }
-
-        T* get() const { return m_ptr; }
-        
-        void clear();
-        PassRefPtr<T> release() { PassRefPtr<T> tmp = adoptRef(m_ptr); m_ptr = 0; return tmp; }
-
-        T& operator*() const { return *m_ptr; }
-        ALWAYS_INLINE 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* (RefPtr::*UnspecifiedBoolType);
-        operator UnspecifiedBoolType() const { return m_ptr ? &RefPtr::m_ptr : 0; }
-        
-        RefPtr& operator=(const RefPtr&);
-        RefPtr& operator=(T*);
-        RefPtr& operator=(const PassRefPtr<T>&);
-#if !COMPILER_SUPPORTS(CXX_NULLPTR)
-        RefPtr& operator=(std::nullptr_t) { clear(); return *this; }
-#endif
-        template<typename U> RefPtr& operator=(const RefPtr<U>&);
-        template<typename U> RefPtr& operator=(const PassRefPtr<U>&);
-
-        void swap(RefPtr&);
-
-        static T* hashTableDeletedValue() { return reinterpret_cast<T*>(-1); }
-
-    private:
-        T* m_ptr;
-    };
-    
-    template<typename T> template<typename U> inline RefPtr<T>::RefPtr(const PassRefPtr<U>& o)
-        : m_ptr(o.leakRef())
-    {
-    }
-
-    template<typename T> inline void RefPtr<T>::clear()
-    {
-        T* ptr = m_ptr;
-        m_ptr = 0;
-        derefIfNotNull(ptr);
-    }
-
-    template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<T>& o)
-    {
-        T* optr = o.get();
-        refIfNotNull(optr);
-        T* ptr = m_ptr;
-        m_ptr = optr;
-        derefIfNotNull(ptr);
-        return *this;
-    }
-    
-    template<typename T> template<typename U> inline RefPtr<T>& RefPtr<T>::operator=(const RefPtr<U>& o)
-    {
-        T* optr = o.get();
-        refIfNotNull(optr);
-        T* ptr = m_ptr;
-        m_ptr = optr;
-        derefIfNotNull(ptr);
-        return *this;
-    }
-    
-    template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(T* optr)
-    {
-        refIfNotNull(optr);
-        T* ptr = m_ptr;
-        m_ptr = optr;
-        derefIfNotNull(ptr);
-        return *this;
-    }
-
-    template<typename T> inline RefPtr<T>& RefPtr<T>::operator=(const PassRefPtr<T>& o)
-    {
-        T* ptr = m_ptr;
-        m_ptr = o.leakRef();
-        derefIfNotNull(ptr);
-        return *this;
-    }
-
-    template<typename T> template<typename U> inline RefPtr<T>& RefPtr<T>::operator=(const PassRefPtr<U>& o)
-    {
-        T* ptr = m_ptr;
-        m_ptr = o.leakRef();
-        derefIfNotNull(ptr);
-        return *this;
-    }
-
-    template<class T> inline void RefPtr<T>::swap(RefPtr<T>& o)
-    {
-        std::swap(m_ptr, o.m_ptr);
-    }
-
-    template<class T> inline void swap(RefPtr<T>& a, RefPtr<T>& b)
-    {
-        a.swap(b);
-    }
-
-    template<typename T, typename U> inline bool operator==(const RefPtr<T>& a, const RefPtr<U>& b)
-    { 
-        return a.get() == b.get(); 
-    }
-
-    template<typename T, typename U> inline bool operator==(const RefPtr<T>& a, U* b)
-    { 
-        return a.get() == b; 
-    }
-    
-    template<typename T, typename U> inline bool operator==(T* a, const RefPtr<U>& b) 
-    {
-        return a == b.get(); 
-    }
-    
-    template<typename T, typename U> inline bool operator!=(const RefPtr<T>& a, const RefPtr<U>& b)
-    { 
-        return a.get() != b.get(); 
-    }
-
-    template<typename T, typename U> inline bool operator!=(const RefPtr<T>& a, U* b)
-    {
-        return a.get() != b; 
-    }
-
-    template<typename T, typename U> inline bool operator!=(T* a, const RefPtr<U>& b)
-    { 
-        return a != b.get(); 
-    }
-    
-    template<typename T, typename U> inline RefPtr<T> static_pointer_cast(const RefPtr<U>& p)
-    { 
-        return RefPtr<T>(static_cast<T*>(p.get())); 
-    }
-
-    template<typename T, typename U> inline RefPtr<T> const_pointer_cast(const RefPtr<U>& p)
-    { 
-        return RefPtr<T>(const_cast<T*>(p.get())); 
-    }
-
-    template<typename T> inline T* getPtr(const RefPtr<T>& p)
-    {
-        return p.get();
-    }
-
-} // namespace WTF
-
-using WTF::RefPtr;
-using WTF::static_pointer_cast;
-using WTF::const_pointer_cast;
-
-#endif // WTF_RefPtr_h