reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef SkChunkAlloc_DEFINED |
| 18 | #define SkChunkAlloc_DEFINED |
| 19 | |
| 20 | #include "SkTypes.h" |
| 21 | |
| 22 | class SkChunkAlloc : SkNoncopyable { |
| 23 | public: |
| 24 | SkChunkAlloc(size_t minSize); |
| 25 | ~SkChunkAlloc(); |
| 26 | |
| 27 | /** Free up all allocated blocks. This invalidates all returned |
| 28 | pointers. |
| 29 | */ |
| 30 | void reset(); |
| 31 | |
| 32 | /** Reuse all allocated blocks. This invalidates all returned |
| 33 | pointers (like reset) but doesn't necessarily free up all |
| 34 | of the privately allocated blocks. This is more efficient |
| 35 | if you plan to reuse the allocator multiple times. |
| 36 | */ |
| 37 | void reuse(); |
| 38 | |
| 39 | enum AllocFailType { |
| 40 | kReturnNil_AllocFailType, |
| 41 | kThrow_AllocFailType |
| 42 | }; |
| 43 | |
| 44 | void* alloc(size_t bytes, AllocFailType); |
| 45 | void* allocThrow(size_t bytes) { |
| 46 | return this->alloc(bytes, kThrow_AllocFailType); |
| 47 | } |
| 48 | |
| 49 | size_t totalCapacity() const { return fTotalCapacity; } |
| 50 | |
| 51 | private: |
| 52 | struct Block; |
| 53 | Block* fBlock; |
| 54 | size_t fMinSize; |
| 55 | Block* fPool; |
| 56 | size_t fTotalCapacity; |
| 57 | |
| 58 | Block* newBlock(size_t bytes, AllocFailType ftype); |
| 59 | }; |
| 60 | |
| 61 | #endif |