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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrMemoryPool_DEFINED | 8 #ifndef GrMemoryPool_DEFINED |
9 #define GrMemoryPool_DEFINED | 9 #define GrMemoryPool_DEFINED |
10 | 10 |
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61 BlockHeader* fNext; ///< doubly-linked list of blocks. | 61 BlockHeader* fNext; ///< doubly-linked list of blocks. |
62 BlockHeader* fPrev; | 62 BlockHeader* fPrev; |
63 int fLiveCount; ///< number of outstanding allocations in the | 63 int fLiveCount; ///< number of outstanding allocations in the |
64 ///< block. | 64 ///< block. |
65 intptr_t fCurrPtr; ///< ptr to the start of blocks free space. | 65 intptr_t fCurrPtr; ///< ptr to the start of blocks free space. |
66 intptr_t fPrevPtr; ///< ptr to the last allocation made | 66 intptr_t fPrevPtr; ///< ptr to the last allocation made |
67 size_t fFreeSize; ///< amount of free space left in the block. | 67 size_t fFreeSize; ///< amount of free space left in the block. |
68 size_t fSize; ///< total allocated size of the block | 68 size_t fSize; ///< total allocated size of the block |
69 }; | 69 }; |
70 | 70 |
| 71 static const uint32_t kAssignedMarker = 0xCDCDCDCD; |
| 72 static const uint32_t kFreedMarker = 0xEFEFEFEF; |
| 73 |
| 74 struct AllocHeader { |
| 75 #ifdef SK_DEBUG |
| 76 uint32_t fSentinal; ///< known value to check for memory stomping (
e.g., (CD)*) |
| 77 #endif |
| 78 BlockHeader* fHeader; ///< pointer back to the block header in which
an alloc resides |
| 79 }; |
| 80 |
71 enum { | 81 enum { |
72 // We assume this alignment is good enough for everybody. | 82 // We assume this alignment is good enough for everybody. |
73 kAlignment = 8, | 83 kAlignment = 8, |
74 kHeaderSize = GR_CT_ALIGN_UP(sizeof(BlockHeader), kAlignment), | 84 kHeaderSize = GR_CT_ALIGN_UP(sizeof(BlockHeader), kAlignment), |
75 kPerAllocPad = GR_CT_ALIGN_UP(sizeof(BlockHeader*), kAlignment), | 85 kPerAllocPad = GR_CT_ALIGN_UP(sizeof(AllocHeader), kAlignment), |
76 }; | 86 }; |
77 size_t fSize; | 87 size_t fSize; |
78 size_t fPreallocSize; | 88 size_t fPreallocSize; |
79 size_t fMinAllocSize; | 89 size_t fMinAllocSize; |
80 BlockHeader* fHead; | 90 BlockHeader* fHead; |
81 BlockHeader* fTail; | 91 BlockHeader* fTail; |
82 #ifdef SK_DEBUG | 92 #ifdef SK_DEBUG |
83 int fAllocationCnt; | 93 int fAllocationCnt; |
84 int fAllocBlockCnt; | 94 int fAllocBlockCnt; |
85 #endif | 95 #endif |
86 }; | 96 }; |
87 | 97 |
88 #endif | 98 #endif |
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