| /* |
| * 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. |
| * |
| * 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 HeapBlock_h |
| #define HeapBlock_h |
| |
| #include <wtf/DoublyLinkedList.h> |
| #include <wtf/StdLibExtras.h> |
| |
| namespace JSC { |
| |
| enum AllocationEffort { AllocationCanFail, AllocationMustSucceed }; |
| |
| class Region; |
| |
| #if COMPILER(GCC) |
| #define CLASS_IF_GCC class |
| #else |
| #define CLASS_IF_GCC |
| #endif |
| |
| template<typename T> |
| class HeapBlock : public DoublyLinkedListNode<T> { |
| friend CLASS_IF_GCC DoublyLinkedListNode<T>; |
| public: |
| static HeapBlock* destroy(HeapBlock* block) |
| { |
| static_cast<T*>(block)->~T(); |
| return block; |
| } |
| |
| HeapBlock(Region* region) |
| : DoublyLinkedListNode<T>() |
| , m_region(region) |
| , m_prev(0) |
| , m_next(0) |
| { |
| ASSERT(m_region); |
| } |
| |
| Region* region() const { return m_region; } |
| |
| private: |
| Region* m_region; |
| T* m_prev; |
| T* m_next; |
| }; |
| |
| } // namespace JSC |
| |
| #endif |
