+++ /dev/null
-/*
- * Copyright (C) 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.
- *
- */
-
-#ifndef WTF_OwnPtr_h
-#define WTF_OwnPtr_h
-
-#include "Assertions.h"
-#include "NullPtr.h"
-#include "OwnPtrCommon.h"
-#include "TypeTraits.h"
-#include <algorithm>
-#include <memory>
-
-namespace WTF {
-
- // Unlike most of our smart pointers, OwnPtr can take either the pointer type or the pointed-to type.
-
- template<typename T> class PassOwnPtr;
- template<typename T> PassOwnPtr<T> adoptPtr(T*);
-
- template<typename T> class OwnPtr {
- public:
- typedef typename RemovePointer<T>::Type ValueType;
- typedef ValueType* PtrType;
-
- OwnPtr() : m_ptr(0) { }
-
- // See comment in PassOwnPtr.h for why this takes a const reference.
- template<typename U> OwnPtr(const PassOwnPtr<U>& o);
-
- // This copy constructor is used implicitly by gcc when it generates
- // transients for assigning a PassOwnPtr<T> object to a stack-allocated
- // OwnPtr<T> object. It should never be called explicitly and gcc
- // should optimize away the constructor when generating code.
- OwnPtr(const OwnPtr<ValueType>&);
-
- ~OwnPtr() { deleteOwnedPtr(m_ptr); }
-
- PtrType get() const { return m_ptr; }
-
- void clear();
- PassOwnPtr<T> release();
- PtrType leakPtr() WARN_UNUSED_RETURN;
-
- ValueType& operator*() const { ASSERT(m_ptr); return *m_ptr; }
- PtrType operator->() const { ASSERT(m_ptr); 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 OwnPtr::*UnspecifiedBoolType;
- operator UnspecifiedBoolType() const { return m_ptr ? &OwnPtr::m_ptr : 0; }
-
- OwnPtr& operator=(const PassOwnPtr<T>&);
- OwnPtr& operator=(std::nullptr_t) { clear(); return *this; }
- template<typename U> OwnPtr& operator=(const PassOwnPtr<U>&);
-
- void swap(OwnPtr& o) { std::swap(m_ptr, o.m_ptr); }
-
-#ifdef LOOSE_OWN_PTR
- explicit OwnPtr(PtrType ptr) : m_ptr(ptr) { }
- void set(PtrType);
-#endif
-
- private:
- OwnPtr& operator=(const OwnPtr<T>&);
-
- // We should never have two OwnPtrs for the same underlying object (otherwise we'll get
- // double-destruction), so these equality operators should never be needed.
- template<typename U> bool operator==(const OwnPtr<U>&) { COMPILE_ASSERT(!sizeof(U*), OwnPtrs_should_never_be_equal); return false; }
- template<typename U> bool operator!=(const OwnPtr<U>&) { COMPILE_ASSERT(!sizeof(U*), OwnPtrs_should_never_be_equal); return false; }
- template<typename U> bool operator==(const PassOwnPtr<U>&) { COMPILE_ASSERT(!sizeof(U*), OwnPtrs_should_never_be_equal); return false; }
- template<typename U> bool operator!=(const PassOwnPtr<U>&) { COMPILE_ASSERT(!sizeof(U*), OwnPtrs_should_never_be_equal); return false; }
-
- PtrType m_ptr;
- };
-
- template<typename T> template<typename U> inline OwnPtr<T>::OwnPtr(const PassOwnPtr<U>& o)
- : m_ptr(o.leakPtr())
- {
- }
-
- template<typename T> inline void OwnPtr<T>::clear()
- {
- PtrType ptr = m_ptr;
- m_ptr = 0;
- deleteOwnedPtr(ptr);
- }
-
- template<typename T> inline PassOwnPtr<T> OwnPtr<T>::release()
- {
- PtrType ptr = m_ptr;
- m_ptr = 0;
- return adoptPtr(ptr);
- }
-
- template<typename T> inline typename OwnPtr<T>::PtrType OwnPtr<T>::leakPtr()
- {
- PtrType ptr = m_ptr;
- m_ptr = 0;
- return ptr;
- }
-
-#ifdef LOOSE_OWN_PTR
- template<typename T> inline void OwnPtr<T>::set(PtrType ptr)
- {
- ASSERT(!ptr || m_ptr != ptr);
- PtrType oldPtr = m_ptr;
- m_ptr = ptr;
- deleteOwnedPtr(oldPtr);
- }
-#endif
-
- template<typename T> inline OwnPtr<T>& OwnPtr<T>::operator=(const PassOwnPtr<T>& o)
- {
- PtrType ptr = m_ptr;
- m_ptr = o.leakPtr();
- ASSERT(!ptr || m_ptr != ptr);
- deleteOwnedPtr(ptr);
- return *this;
- }
-
- template<typename T> template<typename U> inline OwnPtr<T>& OwnPtr<T>::operator=(const PassOwnPtr<U>& o)
- {
- PtrType ptr = m_ptr;
- m_ptr = o.leakPtr();
- ASSERT(!ptr || m_ptr != ptr);
- deleteOwnedPtr(ptr);
- return *this;
- }
-
- template<typename T> inline void swap(OwnPtr<T>& a, OwnPtr<T>& b)
- {
- a.swap(b);
- }
-
- template<typename T, typename U> inline bool operator==(const OwnPtr<T>& a, U* b)
- {
- return a.get() == b;
- }
-
- template<typename T, typename U> inline bool operator==(T* a, const OwnPtr<U>& b)
- {
- return a == b.get();
- }
-
- template<typename T, typename U> inline bool operator!=(const OwnPtr<T>& a, U* b)
- {
- return a.get() != b;
- }
-
- template<typename T, typename U> inline bool operator!=(T* a, const OwnPtr<U>& b)
- {
- return a != b.get();
- }
-
- template<typename T> inline typename OwnPtr<T>::PtrType getPtr(const OwnPtr<T>& p)
- {
- return p.get();
- }
-
-} // namespace WTF
-
-using WTF::OwnPtr;
-
-#endif // WTF_OwnPtr_h
projects / apple / javascriptcore.git / blobdiff