예를 들어 libev을 사용하여 알림 메커니즘을 사용하십시오.
기본적인 아이디어는 데이터를 사용할 수 있다면 콜백이 호출된다는 것입니다.
이것이 작동하지 않으면 inotify와 같이 다른 API를 사용해야 할 수도 있습니다. libev 워드 프로세서의
예 의례 :
// a single header file is required
#include <ev.h>
#include <stdio.h> // for puts
// every watcher type has its own typedef'd struct
// with the name ev_TYPE
ev_io stdin_watcher;
ev_timer timeout_watcher;
// all watcher callbacks have a similar signature
// this callback is called when data is readable on stdin
static void
stdin_cb (EV_P_ ev_io *w, int revents)
{
puts ("stdin ready");
// for one-shot events, one must manually stop the watcher
// with its corresponding stop function.
ev_io_stop (EV_A_ w);
// this causes all nested ev_run's to stop iterating
ev_break (EV_A_ EVBREAK_ALL);
}
// another callback, this time for a time-out
static void
timeout_cb (EV_P_ ev_timer *w, int revents)
{
puts ("timeout");
// this causes the innermost ev_run to stop iterating
ev_break (EV_A_ EVBREAK_ONE);
}
int
main (void)
{
// use the default event loop unless you have special needs
struct ev_loop *loop = EV_DEFAULT;
// initialise an io watcher, then start it
// this one will watch for stdin to become readable
ev_io_init (&stdin_watcher, stdin_cb, /*STDIN_FILENO*/ 0, EV_READ);
ev_io_start (loop, &stdin_watcher);
// initialise a timer watcher, then start it
// simple non-repeating 5.5 second timeout
ev_timer_init (&timeout_watcher, timeout_cb, 5.5, 0.);
ev_timer_start (loop, &timeout_watcher);
// now wait for events to arrive
ev_run (loop, 0);
// break was called, so exit
return 0;
}