115 lines
3.9 KiB
C++
115 lines
3.9 KiB
C++
/*
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* Copyright (C) 2018 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/chrono_utils.h>
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#include <android-base/unique_fd.h>
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#include <linux/genetlink.h>
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#include <netlink/genl/ctrl.h>
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#include <netlink/genl/genl.h>
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#include <utils/Looper.h>
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#include <utils/Thread.h>
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#include <chrono>
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#include <condition_variable>
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#include <future>
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#include <list>
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#include <mutex>
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#include <set>
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#include <string>
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#include <thread>
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#include <unordered_map>
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#include <vector>
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namespace android {
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namespace hardware {
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namespace thermal {
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namespace V2_0 {
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namespace implementation {
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using android::base::boot_clock;
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using android::base::unique_fd;
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using WatcherCallback = std::function<std::chrono::milliseconds(const std::set<std::string> &name)>;
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// A helper class for monitoring thermal files changes.
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class ThermalWatcher : public ::android::Thread {
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public:
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explicit ThermalWatcher(const WatcherCallback &cb)
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: Thread(false), cb_(cb), looper_(new Looper(true)) {}
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~ThermalWatcher() = default;
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// Disallow copy and assign.
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ThermalWatcher(const ThermalWatcher &) = delete;
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void operator=(const ThermalWatcher &) = delete;
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// Start the thread and return true if it succeeds.
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bool startWatchingDeviceFiles();
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// Give the file watcher a list of files to start watching. This helper
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// class will by default wait for modifications to the file with a looper.
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// This should be called before starting watcher thread.
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// For monitoring uevents.
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void registerFilesToWatch(const std::set<std::string> &sensors_to_watch);
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// For monitoring thermal genl events.
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void registerFilesToWatchNl(const std::set<std::string> &sensors_to_watch);
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// Wake up the looper thus the worker thread, immediately. This can be called
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// in any thread.
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void wake();
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private:
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// The work done by the watcher thread. This will use inotify to check for
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// modifications to the files to watch. If any modification is seen this
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// will callback the registered function with the new data read from the
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// modified file.
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bool threadLoop() override;
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// Parse uevent message
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void parseUevent(std::set<std::string> *sensor_name);
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// Parse thermal netlink message
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void parseGenlink(std::set<std::string> *sensor_name);
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// Maps watcher filer descriptor to watched file path.
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std::unordered_map<int, std::string> watch_to_file_path_map_;
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// The callback function. Called whenever thermal uevent is seen.
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// The function passed in should expect a string in the form (type).
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// Where type is the name of the thermal zone that trigger a uevent notification.
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// Callback will return thermal trigger status for next polling decision.
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const WatcherCallback cb_;
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sp<Looper> looper_;
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// For uevent socket registration.
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android::base::unique_fd uevent_fd_;
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// For thermal genl socket registration.
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android::base::unique_fd thermal_genl_fd_;
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// Sensor list which monitor flag is enabled.
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std::set<std::string> monitored_sensors_;
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// Sleep interval voting result
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std::chrono::milliseconds sleep_ms_;
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// Timestamp for last thermal update
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boot_clock::time_point last_update_time_;
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// For thermal genl socket object.
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struct nl_sock *sk_thermal;
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};
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} // namespace implementation
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} // namespace V2_0
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} // namespace thermal
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} // namespace hardware
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} // namespace android
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