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 SkDeque_DEFINED |
| 18 | #define SkDeque_DEFINED |
| 19 | |
| 20 | #include "SkTypes.h" |
| 21 | |
| 22 | class SkDeque : SkNoncopyable { |
| 23 | public: |
| 24 | explicit SkDeque(size_t elemSize); |
| 25 | SkDeque(size_t elemSize, void* storage, size_t storageSize); |
| 26 | ~SkDeque(); |
| 27 | |
| 28 | bool empty() const { return 0 == fCount; } |
| 29 | int count() const { return fCount; } |
| 30 | size_t elemSize() const { return fElemSize; } |
| 31 | |
| 32 | const void* front() const; |
| 33 | const void* back() const; |
| 34 | |
| 35 | void* front() { |
| 36 | return (void*)((const SkDeque*)this)->front(); |
| 37 | } |
| 38 | |
| 39 | void* back() { |
| 40 | return (void*)((const SkDeque*)this)->back(); |
| 41 | } |
| 42 | |
| 43 | void* push_front(); |
| 44 | void* push_back(); |
| 45 | |
| 46 | void pop_front(); |
| 47 | void pop_back(); |
| 48 | |
| 49 | private: |
| 50 | struct Head; |
| 51 | |
| 52 | public: |
| 53 | class Iter { |
| 54 | public: |
| 55 | Iter(const SkDeque& d); |
| 56 | void* next(); |
| 57 | |
| 58 | private: |
| 59 | SkDeque::Head* fHead; |
| 60 | char* fPos; |
| 61 | size_t fElemSize; |
| 62 | }; |
| 63 | |
| 64 | private: |
| 65 | Head* fFront; |
| 66 | Head* fBack; |
| 67 | size_t fElemSize; |
| 68 | void* fInitialStorage; |
| 69 | int fCount; |
| 70 | |
| 71 | friend class Iter; |
| 72 | }; |
| 73 | |
| 74 | #endif |