1 /* 2 * Copyright (C) Texas Instruments - http://www.ti.com/ 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 <utils/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
