1 /* 2 * Copyright (C) 2021 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 #include "util/CancellationSignal.h" 18 19 #include <android-base/logging.h> 20 #include <chrono> 21 22 namespace aidl::android::hardware::biometrics { 23 CancellationSignal(std::promise<void> && cancellationPromise)24CancellationSignal::CancellationSignal(std::promise<void>&& cancellationPromise) 25 : mCancellationPromise(std::move(cancellationPromise)), isSet(false) {} 26 cancel()27ndk::ScopedAStatus CancellationSignal::cancel() { 28 if (!isSet) { 29 mCancellationPromise.set_value(); 30 isSet = true; 31 } 32 return ndk::ScopedAStatus::ok(); 33 } 34 shouldCancel(const std::future<void> & f)35bool shouldCancel(const std::future<void>& f) { 36 CHECK(f.valid()); 37 return f.wait_for(std::chrono::seconds(0)) == std::future_status::ready; 38 } 39 40 } // namespace aidl::android::hardware::biometrics 41