60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
/*
|
|
* Copyright 2022 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <map>
|
|
#include <mutex>
|
|
#include <thread>
|
|
|
|
namespace android::hardware::bluetooth::async {
|
|
|
|
using ReadCallback = std::function<void(int)>;
|
|
using TimeoutCallback = std::function<void(void)>;
|
|
|
|
class AsyncFdWatcher {
|
|
public:
|
|
AsyncFdWatcher() = default;
|
|
~AsyncFdWatcher();
|
|
|
|
int WatchFdForNonBlockingReads(int file_descriptor,
|
|
const ReadCallback& on_read_fd_ready_callback);
|
|
int ConfigureTimeout(const std::chrono::milliseconds timeout,
|
|
const TimeoutCallback& on_timeout_callback);
|
|
void StopWatchingFileDescriptors();
|
|
|
|
private:
|
|
AsyncFdWatcher(const AsyncFdWatcher&) = delete;
|
|
AsyncFdWatcher& operator=(const AsyncFdWatcher&) = delete;
|
|
|
|
int tryStartThread();
|
|
int stopThread();
|
|
int notifyThread();
|
|
void ThreadRoutine();
|
|
|
|
std::atomic_bool running_{false};
|
|
std::thread thread_;
|
|
std::mutex internal_mutex_;
|
|
std::mutex timeout_mutex_;
|
|
|
|
std::map<int, ReadCallback> watched_fds_;
|
|
int notification_listen_fd_;
|
|
int notification_write_fd_;
|
|
TimeoutCallback timeout_cb_;
|
|
std::chrono::milliseconds timeout_ms_;
|
|
};
|
|
|
|
} // namespace android::hardware::bluetooth::async
|