53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
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/*
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* Copyright (C) 2022 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 <array>
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#include <android-base/result.h>
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namespace android {
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namespace init {
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// A FIFO for inter-process communication that uses a Unix pipe internally.
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class InterprocessFifo {
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public:
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template <typename T>
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using Result = ::android::base::Result<T>;
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InterprocessFifo() noexcept;
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InterprocessFifo(const InterprocessFifo& orig) noexcept = delete;
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InterprocessFifo(InterprocessFifo&& orig) noexcept;
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InterprocessFifo& operator=(const InterprocessFifo& orig) noexcept = delete;
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InterprocessFifo& operator=(InterprocessFifo&& orig) noexcept = delete;
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~InterprocessFifo() noexcept;
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void CloseReadFd() noexcept;
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void CloseWriteFd() noexcept;
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void Close() noexcept;
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Result<void> Initialize() noexcept;
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Result<void> Write(uint8_t byte) noexcept;
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Result<uint8_t> Read() noexcept;
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private:
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static void CloseFd(int& fd) noexcept;
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std::array<int, 2> fds_;
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};
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} // namespace init
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} // namespace android
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