00001 /* 00002 * Copyright (C) 2006 The Android Open Source Project 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00017 #ifndef SkThread_DEFINED 00018 #define SkThread_DEFINED 00019 00020 #include "SkTypes.h" 00021 #include "SkThread_platform.h" 00022 00023 /****** SkThread_platform needs to define the following... 00024 00025 int32_t sk_atomic_inc(int32_t*); 00026 int32_t sk_atomic_dec(int32_t*); 00027 00028 class SkMutex { 00029 public: 00030 SkMutex(); 00031 ~SkMutex(); 00032 00033 void acquire(); 00034 void release(); 00035 }; 00036 00037 ****************/ 00038 00039 class SkAutoMutexAcquire : SkNoncopyable { 00040 public: 00041 explicit SkAutoMutexAcquire(SkMutex& mutex) : fMutex(&mutex) 00042 { 00043 SkASSERT(fMutex != NULL); 00044 mutex.acquire(); 00045 } 00048 ~SkAutoMutexAcquire() 00049 { 00050 if (fMutex) 00051 fMutex->release(); 00052 } 00055 void release() 00056 { 00057 if (fMutex) 00058 { 00059 fMutex->release(); 00060 fMutex = NULL; 00061 } 00062 } 00063 00064 private: 00065 SkMutex* fMutex; 00066 }; 00067 00068 #endif