| /* |
| * Copyright (C) 2011 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. |
| * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
| * its contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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_PassTraits_h |
| #define WTF_PassTraits_h |
| |
| #include <wtf/OwnPtr.h> |
| #include <wtf/RefPtr.h> |
| |
| // The PassTraits template exists to help optimize (or make possible) use |
| // of WTF data structures with WTF smart pointers that have a Pass |
| // variant for transfer of ownership |
| |
| namespace WTF { |
| |
| template<typename T> struct PassTraits { |
| typedef T Type; |
| typedef T PassType; |
| static PassType transfer(Type& value) { return value; } |
| }; |
| |
| template<typename T> struct PassTraits<OwnPtr<T> > { |
| typedef OwnPtr<T> Type; |
| typedef PassOwnPtr<T> PassType; |
| static PassType transfer(Type& value) { return value.release(); } |
| }; |
| |
| template<typename T> struct PassTraits<RefPtr<T> > { |
| typedef RefPtr<T> Type; |
| typedef PassRefPtr<T> PassType; |
| static PassType transfer(Type& value) { return value.release(); } |
| }; |
| |
| } // namespace WTF |
| |
| using WTF::PassTraits; |
| |
| #endif // WTF_PassTraits_h |