linux - EPoll Callback function -


i have question refering following topic: how pass callback function pointer epoll_event structure in c++

i using example , try replace if/else-block 2 callback functions timer , signal. don't know how.

this part of code:

    int n = epoll_wait (epollfd, events , num_events, -1 );     (int = 0; < n; ++i) {         if (events[i].data.fd == timerfd) {             read(....);             printf ("timer %....");         }         else if (events[i].data.fd == signalfd){             read();         }     }


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