1 /* 2 * Copyright (C) 2017 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 #ifndef ANDROID_HARDWARE_BROADCASTRADIO_V1_1_CALL_BARRIER 17 #define ANDROID_HARDWARE_BROADCASTRADIO_V1_1_CALL_BARRIER 18 19 #include <chrono> 20 #include <thread> 21 22 namespace android { 23 namespace hardware { 24 namespace broadcastradio { 25 namespace vts { 26 27 /** 28 * A barrier for thread synchronization, where one should wait for another to 29 * reach a specific point in execution. 30 */ 31 class CallBarrier { 32 public: 33 /** 34 * Notify the other thread it may continue execution. 35 * 36 * This may be called before the other thread starts waiting on the barrier. 37 */ 38 void call(); 39 40 /** 41 * Wait for the other thread to reach call() execution point. 42 * 43 * @param timeout a maximum time to wait. 44 * @returns {@code false} if timed out, {@code true} otherwise. 45 */ 46 bool waitForCall(std::chrono::milliseconds timeout); 47 48 private: 49 bool mWasCalled = false; 50 std::mutex mMut; 51 std::condition_variable mCond; 52 }; 53 54 } // namespace vts 55 } // namespace broadcastradio 56 } // namespace hardware 57 } // namespace android 58 59 #endif // ANDROID_HARDWARE_BROADCASTRADIO_V1_1_CALL_BARRIER 60