Move Source/WTF/wtf to Source/wtf

Source/WTF/wtf/PassOwnArrayPtr.h

-/*
- * Copyright (C) 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_PassOwnArrayPtr_h
-#define WTF_PassOwnArrayPtr_h
-
-#include <wtf/Assertions.h>
-#include <wtf/NullPtr.h>
-#include <wtf/TypeTraits.h>
-
-namespace WTF {
-
-template<typename T> class OwnArrayPtr;
-template<typename T> class PassOwnArrayPtr;
-template<typename T> PassOwnArrayPtr<T> adoptArrayPtr(T*);
-template<typename T> void deleteOwnedArrayPtr(T* ptr);
-
-template<typename T> class PassOwnArrayPtr {
-public:
-    typedef T* PtrType;
-
-    PassOwnArrayPtr() : m_ptr(0) { }
-    PassOwnArrayPtr(std::nullptr_t) : m_ptr(0) { }
-
-    // It somewhat breaks the type system to allow transfer of ownership out of
-    // a const PassOwnArrayPtr. However, it makes it much easier to work with PassOwnArrayPtr
-    // temporaries, and we don't have a need to use real const PassOwnArrayPtrs anyway.
-    PassOwnArrayPtr(const PassOwnArrayPtr& o) : m_ptr(o.leakPtr()) { }
-    template<typename U> PassOwnArrayPtr(const PassOwnArrayPtr<U>& o) : m_ptr(o.leakPtr()) { }
-
-    ~PassOwnArrayPtr() { deleteOwnedArrayPtr(m_ptr); }
-
-    PtrType get() const { return m_ptr; }
-
-    PtrType leakPtr() const WARN_UNUSED_RETURN;
-
-    T& 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 PassOwnArrayPtr::*UnspecifiedBoolType;
-    operator UnspecifiedBoolType() const { return m_ptr ? &PassOwnArrayPtr::m_ptr : 0; }
-
-    PassOwnArrayPtr& operator=(const PassOwnArrayPtr&) { COMPILE_ASSERT(!sizeof(T*), PassOwnArrayPtr_should_never_be_assigned_to); return *this; }
-
-    template<typename U> friend PassOwnArrayPtr<U> adoptArrayPtr(U*);
-
-private:
-    explicit PassOwnArrayPtr(PtrType ptr) : m_ptr(ptr) { }
-
-    mutable PtrType m_ptr;
-};
-
-template<typename T> inline typename PassOwnArrayPtr<T>::PtrType PassOwnArrayPtr<T>::leakPtr() const
-{
-    PtrType ptr = m_ptr;
-    m_ptr = 0;
-    return ptr;
-}
-
-template<typename T, typename U> inline bool operator==(const PassOwnArrayPtr<T>& a, const PassOwnArrayPtr<U>& b) 
-{
-    return a.get() == b.get(); 
-}
-
-template<typename T, typename U> inline bool operator==(const PassOwnArrayPtr<T>& a, const OwnArrayPtr<U>& b) 
-{
-    return a.get() == b.get(); 
-}
-
-template<typename T, typename U> inline bool operator==(const OwnArrayPtr<T>& a, const PassOwnArrayPtr<U>& b) 
-{
-    return a.get() == b.get(); 
-}
-
-template<typename T, typename U> inline bool operator==(const PassOwnArrayPtr<T>& a, U* b) 
-{
-    return a.get() == b; 
-}
-
-template<typename T, typename U> inline bool operator==(T* a, const PassOwnArrayPtr<U>& b) 
-{
-    return a == b.get(); 
-}
-
-template<typename T, typename U> inline bool operator!=(const PassOwnArrayPtr<T>& a, const PassOwnArrayPtr<U>& b) 
-{
-    return a.get() != b.get(); 
-}
-
-template<typename T, typename U> inline bool operator!=(const PassOwnArrayPtr<T>& a, const OwnArrayPtr<U>& b) 
-{
-    return a.get() != b.get(); 
-}
-
-template<typename T, typename U> inline bool operator!=(const OwnArrayPtr<T>& a, const PassOwnArrayPtr<U>& b) 
-{
-    return a.get() != b.get(); 
-}
-
-template<typename T, typename U> inline bool operator!=(const PassOwnArrayPtr<T>& a, U* b)
-{
-    return a.get() != b; 
-}
-
-template<typename T, typename U> inline bool operator!=(T* a, const PassOwnArrayPtr<U>& b) 
-{
-    return a != b.get(); 
-}
-
-template<typename T> inline PassOwnArrayPtr<T> adoptArrayPtr(T* ptr)
-{
-    return PassOwnArrayPtr<T>(ptr);
-}
-
-template<typename T> inline void deleteOwnedArrayPtr(T* ptr)
-{
-    typedef char known[sizeof(T) ? 1 : -1];
-    if (sizeof(known))
-        delete [] ptr;
-}
-
-template<typename T, typename U> inline PassOwnArrayPtr<T> static_pointer_cast(const PassOwnArrayPtr<U>& p) 
-{
-    return adoptArrayPtr(static_cast<T*>(p.leakPtr()));
-}
-
-template<typename T, typename U> inline PassOwnArrayPtr<T> const_pointer_cast(const PassOwnArrayPtr<U>& p) 
-{
-    return adoptArrayPtr(const_cast<T*>(p.leakPtr()));
-}
-
-template<typename T> inline T* getPtr(const PassOwnArrayPtr<T>& p)
-{
-    return p.get();
-}
-
-} // namespace WTF
-
-using WTF::PassOwnArrayPtr;
-using WTF::adoptArrayPtr;
-using WTF::const_pointer_cast;
-using WTF::static_pointer_cast;
-
-#endif // WTF_PassOwnArrayPtr_h