mirror of
https://github.com/openharmony/utils_native.git
synced 2026-07-21 01:25:42 -04:00
zhoushilin
101 lines
3.3 KiB
C++
101 lines
3.3 KiB
C++
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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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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#ifndef UTILS_TIMER_H
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#define UTILS_TIMER_H
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#include <sys/types.h>
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#include <cstdint>
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#include <string>
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#include <list>
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#include <map>
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#include <mutex>
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#include <thread>
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#include <vector>
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#include "../src/event_reactor.h"
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namespace OHOS {
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namespace Utils {
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class Timer {
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public:
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using TimerCallback = std::function<void ()>;
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using TimerCallbackPtr = std::shared_ptr<TimerCallback>;
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using TimerListCallback = std::function<void (int timerFd)>;
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public:
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/*
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* if performance-sensitive, change "timeout" larger before Setup
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* default-value(1000ms), performance-estimate: occupy fixed-100us in every default-value(1000ms)
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* timeout: range [-1, INT32MAX], but [-1,0] is not recommended
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* -1: wait for ever(until event-trigger);
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* 0: no wait, occupy too much cpu time;
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* others: wait(until event-trigger)
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*/
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explicit Timer(const std::string& name, int timeoutMs = 1000);
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virtual ~Timer() {}
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virtual uint32_t Setup();
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/*
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* useJoin true: use std::thread::join(default)
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* false: use std::thread::detach(not recommended)
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* if timeoutMs = -1 and no valid event-trigger in epoll_wait:
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* use std::thread::detach inside to avoid deadloop
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*/
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virtual void Shutdown(bool useJoin = true);
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uint32_t Register(const TimerCallback& callback, uint32_t interval /* ms */, bool once = false);
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void Unregister(uint32_t timerId);
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private:
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void MainLoop();
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void OnTimer(int timerFd);
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virtual uint32_t DoRegister(const TimerListCallback& callback, uint32_t interval, bool once, int &timerFd);
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virtual void DoUnregister(uint32_t interval);
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void DoTimerListCallback(const TimerListCallback& callback, int timerFd);
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uint32_t GetValidId(uint32_t timerId) const;
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int GetTimerFd(uint32_t interval /* ms */);
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void EraseUnusedTimerId(uint32_t interval, const std::vector<uint32_t>& unusedIds);
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private:
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struct TimerEntry {
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uint32_t timerId; // unique id
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uint32_t interval; // million second
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TimerCallback callback;
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bool once;
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int timerFd;
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};
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using TimerEntryPtr = std::shared_ptr<TimerEntry>;
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using TimerEntryList = std::list<TimerEntryPtr>;
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std::map<uint32_t, TimerEntryList> intervalToTimers_; // interval to TimerEntryList
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std::map<uint32_t, TimerEntryPtr> timerToEntries_; // timer_id to TimerEntry
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std::string name_;
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int timeoutMs_;
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std::thread thread_;
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std::unique_ptr<EventReactor> reactor_;
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std::map<uint32_t, uint32_t> timers_; // timer_fd to interval
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std::mutex mutex_;
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};
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} // namespace Utils
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} // namespace OHOS
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#endif
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