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 <aidl/android/hardware/biometrics/fingerprint/ISessionCallback.h>
21 #include <functional>
22 #include <future>
23 
24 #include "WorkerThread.h"
25 
26 namespace aidl::android::hardware::biometrics::fingerprint {
27 
28 class CancellationSignal : public common::BnCancellationSignal {
29   public:
30     explicit CancellationSignal(std::promise<void>&& cancellationPromise);
31 
32     ndk::ScopedAStatus cancel() override;
33 
34   private:
35     std::promise<void> mCancellationPromise;
36 };
37 
38 // Returns whether the given cancellation future is ready, i.e. whether the operation corresponding
39 // to this future should be cancelled.
40 bool shouldCancel(const std::future<void>& cancellationFuture);
41 
42 }  // namespace aidl::android::hardware::biometrics::fingerprint
43