blob: 3b4b68f6cdaf5f80da80918c1fb8eb7084b87895
| 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 | |
| 18 | |
| 19 | #include <Errors.h> |
| 20 | #include <semaphore.h> |
| 21 | #include <stdio.h> |
| 22 | #include <stdarg.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | #include <unistd.h> |
| 26 | |
| 27 | namespace android { |
| 28 | |
| 29 | class Semaphore |
| 30 | { |
| 31 | public: |
| 32 | |
| 33 | Semaphore(); |
| 34 | ~Semaphore(); |
| 35 | |
| 36 | //Release semaphore |
| 37 | status_t Release(); |
| 38 | |
| 39 | ///Create the semaphore with initial count value |
| 40 | status_t Create(int count=0); |
| 41 | |
| 42 | ///Wait operation |
| 43 | status_t Wait(); |
| 44 | |
| 45 | ///Signal operation |
| 46 | status_t Signal(); |
| 47 | |
| 48 | ///Current semaphore count |
| 49 | int Count(); |
| 50 | |
| 51 | ///Wait operation with a timeout |
| 52 | status_t WaitTimeout(int timeoutMicroSecs); |
| 53 | |
| 54 | private: |
| 55 | sem_t *mSemaphore; |
| 56 | |
| 57 | }; |
| 58 | |
| 59 | }; |
| 60 |