| | 1 | /* |
| | 2 | * Copyright (C) 2011 Apple Inc. All rights reserved. |
| | 3 | * |
| | 4 | * Redistribution and use in source and binary forms, with or without |
| | 5 | * modification, are permitted provided that the following conditions |
| | 6 | * are met: |
| | 7 | * 1. Redistributions of source code must retain the above copyright |
| | 8 | * notice, this list of conditions and the following disclaimer. |
| | 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 10 | * notice, this list of conditions and the following disclaimer in the |
| | 11 | * documentation and/or other materials provided with the distribution. |
| | 12 | * |
| | 13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY |
| | 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| | 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR |
| | 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| | 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| | 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| | 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| | 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| | 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| | 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| | 24 | */ |
| | 25 | |
| | 26 | #ifndef HeapBlock_h |
| | 27 | #define HeapBlock_h |
| | 28 | |
| | 29 | #include <wtf/DoublyLinkedList.h> |
| | 30 | #include <wtf/StdLibExtras.h> |
| | 31 | |
| | 32 | namespace JSC { |
| | 33 | |
| | 34 | enum AllocationEffort { AllocationCanFail, AllocationMustSucceed }; |
| | 35 | |
| | 36 | class Region; |
| | 37 | |
| | 38 | #if COMPILER(GCC) |
| | 39 | #define CLASS_IF_GCC class |
| | 40 | #else |
| | 41 | #define CLASS_IF_GCC |
| | 42 | #endif |
| | 43 | |
| | 44 | template<typename T> |
| | 45 | class HeapBlock : public DoublyLinkedListNode<T> { |
| | 46 | friend CLASS_IF_GCC DoublyLinkedListNode<T>; |
| | 47 | public: |
| | 48 | static HeapBlock* destroy(HeapBlock* block) WARN_UNUSED_RETURN |
| | 49 | { |
| | 50 | static_cast<T*>(block)->~T(); |
| | 51 | return block; |
| | 52 | } |
| | 53 | |
| | 54 | HeapBlock(Region* region) |
| | 55 | : DoublyLinkedListNode<T>() |
| | 56 | , m_region(region) |
| | 57 | , m_prev(0) |
| | 58 | , m_next(0) |
| | 59 | { |
| | 60 | ASSERT(m_region); |
| | 61 | } |
| | 62 | |
| | 63 | Region* region() const { return m_region; } |
| | 64 | |
| | 65 | private: |
| | 66 | Region* m_region; |
| | 67 | T* m_prev; |
| | 68 | T* m_next; |
| | 69 | }; |
| | 70 | |
| | 71 | } // namespace JSC |
| | 72 | |
| | 73 | #endif |
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