C++ library for asynchronous and event-driven execution
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asynco/lib/timers.hpp

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#ifndef _TIMERS_
#define _TIMERS_
#include "asynco.hpp"
#include <chrono>
using namespace std;
using namespace marcelb;
using namespace asynco;
namespace marcelb {
namespace asynco {
/**
* Get the time in ms from the epoch
*/
int64_t rtime_ms() {
return chrono::duration_cast<chrono::milliseconds>(chrono::system_clock::now()
.time_since_epoch())
.count();
}
/**
* Get the time in us from the epoch
*/
int64_t rtime_us() {
return chrono::duration_cast<chrono::microseconds>(chrono::system_clock::now()
.time_since_epoch())
.count();
}
/**
* Core timer class for construct time async functions
*/
class timer {
boost::asio::steady_timer st;
bool _stop = false;
bool repeate;
function<void()> callback;
uint64_t time;
uint64_t _ticks = 0;
/**
* A method to assign a callback wrapper and a reinitialization algorithm
*/
void init() {
st.async_wait( [this] (const boost::system::error_code&) {
if (!_stop) {
callback();
if (repeate) {
st = boost::asio::steady_timer(_asynco_engine.io_context, boost::asio::chrono::milliseconds(time));
init();
}
_ticks++;
}
});
}
public:
/**
* The constructor creates the steady_timer and accompanying variables and runs a method to initialize the timer
*/
timer (function<void()> _callback, uint64_t _time, bool _repeate) :
st(_asynco_engine.io_context, boost::asio::chrono::milliseconds(_time)),
_stop(false),
repeate(_repeate),
callback(_callback),
time(_time) {
init();
}
/**
* Stop timer
* The stop flag is set and timer remove it from the queue
*/
void stop() {
_stop = true;
st.cancel();
}
/**
* Run callback now
* Forces the callback function to run independently of the timer
*/
void now() {
st.cancel();
}
/**
* Get the number of times the timer callback was runned
*/
uint64_t ticks() {
return _ticks;
}
/**
* The logic status of the timer stop state
*/
bool stoped() {
return _stop;
}
/**
* The destructor stops the timer
*/
~timer() {
stop();
}
};
/**
* Class periodic for periodic execution of the callback in time in ms
*/
class periodic {
shared_ptr<timer> _timer;
public:
/**
* Constructor initializes a shared pointer of type timer
*/
periodic(function<void()> callback, uint64_t time) :
_timer(make_shared<timer> (callback, time, true)) {
}
/**
* Stop periodic
* The stop flag is set and periodic remove it from the queue
*/
void stop() {
_timer->stop();
}
/**
* Run callback now
* Forces the callback function to run independently of the periodic
*/
void now() {
_timer->now();
}
/**
* Get the number of times the periodic callback was runned
*/
uint64_t ticks() {
return _timer->ticks();
}
/**
* The logic status of the periodic stop state
*/
bool stoped() {
return _timer->stoped();
}
/**
* The destructor stops the periodic
*/
~periodic() {
stop();
}
};
/**
* Class delayed for delayed callback execution in ms
*/
class delayed {
shared_ptr<timer> _timer;
public:
/**
* Constructor initializes a shared pointer of type timer
*/
delayed(function<void()> callback, uint64_t time) :
_timer(make_shared<timer> (callback, time, false)) {
}
/**
* Stop delayed
* The stop flag is set and delayed remove it from the queue
*/
void stop() {
_timer->stop();
}
/**
* Run callback now
* Forces the callback function to run independently of the delayed
*/
void now() {
_timer->now();
}
/**
* Get is the delayed callback runned
*/
bool expired() {
return bool(_timer->ticks());
}
/**
* The logic status of the delayed stop state
*/
bool stoped() {
return _timer->stoped();
}
/**
* The destructor stops the delayed
*/
~delayed() {
stop();
}
};
}
}
#endif