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49 lines
1.5 KiB
49 lines
1.5 KiB
4 months ago
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/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <android-base/macros.h>
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#include <android/hardware/automotive/audiocontrol/2.0/ICloseHandle.h>
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namespace android::hardware::automotive::audiocontrol::V2_0::implementation {
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/** Generic ICloseHandle implementation ignoring double-close events. */
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class CloseHandle : public ICloseHandle {
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public:
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using Callback = std::function<void()>;
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/**
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* Create a handle with a callback.
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*
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* The callback is guaranteed to be called exactly once.
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*
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* \param callback Called on the first close() call, or on destruction of the handle
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*/
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CloseHandle(Callback callback = nullptr);
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virtual ~CloseHandle();
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Return<void> close() override;
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private:
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const Callback mCallback;
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std::atomic<bool> mIsClosed = false;
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DISALLOW_COPY_AND_ASSIGN(CloseHandle);
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};
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} // namespace android::hardware::automotive::audiocontrol::V2_0::implementation
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