Two simple timer class, with a thread safe one !

This little header only file contain 2 classes of timer.

• The Timer class : compute an interval of time
• The Thread Timer : a thread safe timer, used to compute the cumulative time spent in a partion of code, in all threads.

The classes has 4 methods :

• start() : start the timer
• storp() : stop the timer
• ms() : return the time recorded between start and stop
• reset() : reset the timer

The thread timer is a bit more tricky to use : Compared to the "basic" timer, the thread timer can be used INSIDE threads to compute the cumulative time spent in a portion of code (for exemple, in a parallèle for loop). To use it : * declare the thread timer as a global variable * when started, the timer return a token * feed this token to the stop method * enjoy the result of your benchmark ! * * The timer can be set back to ZERO thanks to the reboot() function

#include "timer.h"
#include "thread"
#include "iostream"

ThreadTimer myTimer;

int doStuff(int myInt) {
    int token = myTimer.start();
    // do things
    myTimer.stop(token);
    return myInt;
}

int main(int argc, char **argv) {

    std::thread thread1(doStuff, 1);
    std::thread thread2(doStuff, 2);

    thread1.join();
    thread2.join();
    
    std::cout << "Cumulative time in threads : " << myTimer.ms() << endl; 

}

Thanks to https://github.com/bshoshany/thread-pool for the original template I completed