TimerCallback function based on Standard Template LIbrary without Boost

Question

Are there TimerCallback libraries implemented using STL. I can't bring in Boost dependency into my project.

The timer on expiry should be able to callback the registered function.

Answer 1

There's no specific timer in the standard library, but it's easy enough to implement one:

#include <thread>

template <typename Duration, typename Function>
void timer(Duration const & d, Function const & f)
{
    std::thread([d,f](){
        std::this_thread::sleep_for(d);
        f();
    }).detach();
}

Example of use:

#include <chrono>
#include <iostream>

void hello() {std::cout << "Hello!\n";}

int main()
{
    timer(std::chrono::seconds(5), &hello);
    std::cout << "Launched\n";
    std::this_thread::sleep_for(std::chrono::seconds(10));
}

Beware that the function is invoked on another thread, so make sure any data it accesses is suitably guarded.