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67 lines
1.8 KiB
67 lines
1.8 KiB
// |
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// Copyright 2016 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 <map> |
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#include <mutex> |
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#include <thread> |
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namespace android { |
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namespace hardware { |
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namespace bluetooth { |
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namespace async { |
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using ReadCallback = std::function<void(int)>; |
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using TimeoutCallback = std::function<void(void)>; |
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class AsyncFdWatcher { |
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public: |
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AsyncFdWatcher() = default; |
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~AsyncFdWatcher(); |
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int WatchFdForNonBlockingReads(int file_descriptor, |
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const ReadCallback& on_read_fd_ready_callback); |
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int ConfigureTimeout(const std::chrono::milliseconds timeout, |
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const TimeoutCallback& on_timeout_callback); |
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void StopWatchingFileDescriptors(); |
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private: |
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AsyncFdWatcher(const AsyncFdWatcher&) = delete; |
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AsyncFdWatcher& operator=(const AsyncFdWatcher&) = delete; |
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int tryStartThread(); |
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int stopThread(); |
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int notifyThread(); |
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void ThreadRoutine(); |
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std::atomic_bool running_{false}; |
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std::thread thread_; |
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std::mutex internal_mutex_; |
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std::mutex timeout_mutex_; |
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std::map<int, ReadCallback> watched_fds_; |
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int notification_listen_fd_; |
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int notification_write_fd_; |
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TimeoutCallback timeout_cb_; |
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std::chrono::milliseconds timeout_ms_; |
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}; |
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} // namespace async |
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} // namespace bluetooth |
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} // namespace hardware |
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} // namespace android
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