Elliott Hughes | 8daa092 | 2011-09-11 13:46:25 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2011 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 ART_SRC_MUTEX_H_ |
| 18 | #define ART_SRC_MUTEX_H_ |
| 19 | |
| 20 | #include <pthread.h> |
| 21 | #include <string> |
| 22 | |
| 23 | #include "logging.h" |
| 24 | #include "macros.h" |
| 25 | |
| 26 | namespace art { |
| 27 | |
| 28 | class Mutex { |
| 29 | public: |
| 30 | explicit Mutex(const char* name); |
| 31 | ~Mutex(); |
| 32 | |
| 33 | void Lock(); |
| 34 | |
| 35 | bool TryLock(); |
| 36 | |
| 37 | void Unlock(); |
| 38 | |
| 39 | const char* GetName() { |
| 40 | return name_.c_str(); |
| 41 | } |
| 42 | |
| 43 | pthread_mutex_t* GetImpl() { |
| 44 | return &mutex_; |
| 45 | } |
| 46 | |
| 47 | void AssertHeld() { |
| 48 | #ifdef __BIONIC__ |
| 49 | DCHECK_EQ(GetOwner(), GetTid()); |
| 50 | #endif |
| 51 | } |
| 52 | |
| 53 | void AssertNotHeld() { |
| 54 | #ifdef __BIONIC__ |
| 55 | DCHECK_NE(GetOwner(), GetTid()); |
| 56 | #endif |
| 57 | } |
| 58 | |
| 59 | private: |
| 60 | pid_t GetOwner(); |
| 61 | pid_t GetTid(); |
| 62 | |
| 63 | std::string name_; |
| 64 | |
| 65 | pthread_mutex_t mutex_; |
| 66 | |
| 67 | DISALLOW_COPY_AND_ASSIGN(Mutex); |
| 68 | }; |
| 69 | |
| 70 | class MutexLock { |
| 71 | public: |
| 72 | explicit MutexLock(Mutex& mu) : mu_(mu) { |
| 73 | mu_.Lock(); |
| 74 | } |
| 75 | |
| 76 | ~MutexLock() { |
| 77 | mu_.Unlock(); |
| 78 | } |
| 79 | |
| 80 | private: |
| 81 | Mutex& mu_; |
| 82 | DISALLOW_COPY_AND_ASSIGN(MutexLock); |
| 83 | }; |
| 84 | |
| 85 | } // namespace art |
| 86 | |
| 87 | #endif // ART_SRC_MUTEX_H_ |