timer.h
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/*
This file is part of FlashMQ (https://www.flashmq.org)
Copyright (C) 2021 Wiebe Cazemier
FlashMQ is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, version 3.
FlashMQ is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public
License along with FlashMQ. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef TIMER_H
#define TIMER_H
#include <functional>
#include <thread>
#include <list>
#include "logger.h"
#include "utils.h"
#define MAX_TIMER_EVENTS 32
struct CallbackEntry
{
std::chrono::time_point<std::chrono::steady_clock> lastExecuted = std::chrono::steady_clock::now();
int64_t timeTillNext = 1000;
uint64_t interval = 0;
std::function<void ()> f = nullptr;
std::string name;
void updateExectedAt();
void calculateNewWaitTime();
bool operator <(const CallbackEntry &other) const;
};
// Simple timer that calls your callback. The callback is executed on the timer thread.
class Timer
{
std::thread t;
int epollfd = 0;
int fd = 0;
uint64_t sleeptime = 1000;
int running = false;
Logger *logger = Logger::getInstance();
std::vector<CallbackEntry> callbacks;
std::mutex callbacksMutex;
void sortAndSetSleeptimeTillNext();
void process();
void wakeUpPoll();
public:
Timer();
~Timer();
void start();
void stop();
void addCallback(std::function<void()> f, uint64_t interval_ms, const std::string &name);
};
#endif // TIMER_H