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Diffstat (limited to 'Source/JavaScriptCore/wtf/PassOwnPtr.h')
| -rw-r--r-- | Source/JavaScriptCore/wtf/PassOwnPtr.h | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/Source/JavaScriptCore/wtf/PassOwnPtr.h b/Source/JavaScriptCore/wtf/PassOwnPtr.h deleted file mode 100644 index 5ebf83d65..000000000 --- a/Source/JavaScriptCore/wtf/PassOwnPtr.h +++ /dev/null @@ -1,172 +0,0 @@ -/* - * Copyright (C) 2009, 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. - * - * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR - * 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 WTF_PassOwnPtr_h -#define WTF_PassOwnPtr_h - -#include <wtf/Assertions.h> -#include <wtf/NullPtr.h> -#include <wtf/OwnPtrCommon.h> -#include <wtf/TypeTraits.h> - -namespace WTF { - - // Unlike most of our smart pointers, PassOwnPtr can take either the pointer type or the pointed-to type. - - template<typename T> class OwnPtr; - template<typename T> class PassOwnPtr; - template<typename T> PassOwnPtr<T> adoptPtr(T*); - - template<typename T> class PassOwnPtr { - public: - typedef typename RemovePointer<T>::Type ValueType; - typedef ValueType* PtrType; - - PassOwnPtr() : m_ptr(0) { } - PassOwnPtr(std::nullptr_t) : m_ptr(0) { } - - // It somewhat breaks the type system to allow transfer of ownership out of - // a const PassOwnPtr. However, it makes it much easier to work with PassOwnPtr - // temporaries, and we don't have a need to use real const PassOwnPtrs anyway. - PassOwnPtr(const PassOwnPtr& o) : m_ptr(o.leakPtr()) { } - template<typename U> PassOwnPtr(const PassOwnPtr<U>& o) : m_ptr(o.leakPtr()) { } - - ~PassOwnPtr() { deleteOwnedPtr(m_ptr); } - - PtrType get() const { return m_ptr; } - - PtrType leakPtr() const 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 PassOwnPtr::*UnspecifiedBoolType; - operator UnspecifiedBoolType() const { return m_ptr ? &PassOwnPtr::m_ptr : 0; } - - PassOwnPtr& operator=(const PassOwnPtr&) { COMPILE_ASSERT(!sizeof(T*), PassOwnPtr_should_never_be_assigned_to); return *this; } - - template<typename U> friend PassOwnPtr<U> adoptPtr(U*); - - private: - explicit PassOwnPtr(PtrType ptr) : m_ptr(ptr) { } - - // 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 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; } - 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; } - - mutable PtrType m_ptr; - }; - - template<typename T> inline typename PassOwnPtr<T>::PtrType PassOwnPtr<T>::leakPtr() const - { - PtrType ptr = m_ptr; - m_ptr = 0; - return ptr; - } - - template<typename T, typename U> inline bool operator==(const PassOwnPtr<T>& a, const PassOwnPtr<U>& b) - { - return a.get() == b.get(); - } - - template<typename T, typename U> inline bool operator==(const PassOwnPtr<T>& a, const OwnPtr<U>& b) - { - return a.get() == b.get(); - } - - template<typename T, typename U> inline bool operator==(const OwnPtr<T>& a, const PassOwnPtr<U>& b) - { - return a.get() == b.get(); - } - - template<typename T, typename U> inline bool operator==(const PassOwnPtr<T>& a, U* b) - { - return a.get() == b; - } - - template<typename T, typename U> inline bool operator==(T* a, const PassOwnPtr<U>& b) - { - return a == b.get(); - } - - template<typename T, typename U> inline bool operator!=(const PassOwnPtr<T>& a, const PassOwnPtr<U>& b) - { - return a.get() != b.get(); - } - - template<typename T, typename U> inline bool operator!=(const PassOwnPtr<T>& a, const OwnPtr<U>& b) - { - return a.get() != b.get(); - } - - template<typename T, typename U> inline bool operator!=(const OwnPtr<T>& a, const PassOwnPtr<U>& b) - { - return a.get() != b.get(); - } - - template<typename T, typename U> inline bool operator!=(const PassOwnPtr<T>& a, U* b) - { - return a.get() != b; - } - - template<typename T, typename U> inline bool operator!=(T* a, const PassOwnPtr<U>& b) - { - return a != b.get(); - } - - template<typename T> inline PassOwnPtr<T> adoptPtr(T* ptr) - { - return PassOwnPtr<T>(ptr); - } - - template<typename T, typename U> inline PassOwnPtr<T> static_pointer_cast(const PassOwnPtr<U>& p) - { - return adoptPtr(static_cast<T*>(p.leakPtr())); - } - - template<typename T, typename U> inline PassOwnPtr<T> const_pointer_cast(const PassOwnPtr<U>& p) - { - return adoptPtr(const_cast<T*>(p.leakPtr())); - } - - template<typename T> inline T* getPtr(const PassOwnPtr<T>& p) - { - return p.get(); - } - -} // namespace WTF - -using WTF::PassOwnPtr; -using WTF::adoptPtr; -using WTF::const_pointer_cast; -using WTF::static_pointer_cast; - -#endif // WTF_PassOwnPtr_h |