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 #pragma once
18 
19 #include <aidl/android/hardware/biometrics/common/BnCancellationSignal.h>
20 #include <functional>
21 #include <future>
22 
23 namespace aidl::android::hardware::biometrics {
24 
25 class CancellationSignal : public common::BnCancellationSignal {
26   public:
27     explicit CancellationSignal(std::promise<void>&& cancellationPromise);
28 
29     ndk::ScopedAStatus cancel() override;
30 
31   private:
32     std::promise<void> mCancellationPromise;
33 };
34 
35 // Returns whether the given cancellation future is ready, i.e. whether the operation corresponding
36 // to this future should be cancelled.
37 bool shouldCancel(const std::future<void>& cancellationFuture);
38 
39 }  // namespace aidl::android::hardware::biometrics
40