The Tor Browser / file comparison
comparison: gfx/skia/trunk/include/core/SkChunkAlloc.h
gfx/skia/trunk/include/core/SkChunkAlloc.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:2eac56eeb612 |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2006 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef SkChunkAlloc_DEFINED | |
| 11 #define SkChunkAlloc_DEFINED | |
| 12 | |
| 13 #include "SkTypes.h" | |
| 14 | |
| 15 class SkChunkAlloc : SkNoncopyable { | |
| 16 public: | |
| 17 SkChunkAlloc(size_t minSize); | |
| 18 ~SkChunkAlloc(); | |
| 19 | |
| 20 /** | |
| 21 * Free up all allocated blocks. This invalidates all returned | |
| 22 * pointers. | |
| 23 */ | |
| 24 void reset(); | |
| 25 | |
| 26 enum AllocFailType { | |
| 27 kReturnNil_AllocFailType, | |
| 28 kThrow_AllocFailType | |
| 29 }; | |
| 30 | |
| 31 void* alloc(size_t bytes, AllocFailType); | |
| 32 void* allocThrow(size_t bytes) { | |
| 33 return this->alloc(bytes, kThrow_AllocFailType); | |
| 34 } | |
| 35 | |
| 36 /** Call this to unalloc the most-recently allocated ptr by alloc(). On | |
| 37 success, the number of bytes freed is returned, or 0 if the block could | |
| 38 not be unallocated. This is a hint to the underlying allocator that | |
| 39 the previous allocation may be reused, but the implementation is free | |
| 40 to ignore this call (and return 0). | |
| 41 */ | |
| 42 size_t unalloc(void* ptr); | |
| 43 | |
| 44 size_t totalCapacity() const { return fTotalCapacity; } | |
| 45 size_t totalUsed() const { return fTotalUsed; } | |
| 46 int blockCount() const { return fBlockCount; } | |
| 47 | |
| 48 /** | |
| 49 * Returns true if the specified address is within one of the chunks, and | |
| 50 * has at least 1-byte following the address (i.e. if addr points to the | |
| 51 * end of a chunk, then contains() will return false). | |
| 52 */ | |
| 53 bool contains(const void* addr) const; | |
| 54 | |
| 55 private: | |
| 56 struct Block; | |
| 57 | |
| 58 Block* fBlock; | |
| 59 size_t fMinSize; | |
| 60 size_t fChunkSize; | |
| 61 size_t fTotalCapacity; | |
| 62 size_t fTotalUsed; // will be <= fTotalCapacity | |
| 63 int fBlockCount; | |
| 64 | |
| 65 Block* newBlock(size_t bytes, AllocFailType ftype); | |
| 66 }; | |
| 67 | |
| 68 #endif |
