ualarm.c raw

   1  #define _GNU_SOURCE
   2  #include <unistd.h>
   3  #include <sys/time.h>
   4  
   5  unsigned ualarm(unsigned value, unsigned interval)
   6  {
   7  	struct itimerval it = {
   8  		.it_interval.tv_usec = interval,
   9  		.it_value.tv_usec = value
  10  	}, it_old;
  11  	setitimer(ITIMER_REAL, &it, &it_old);
  12  	return it_old.it_value.tv_sec*1000000 + it_old.it_value.tv_usec;
  13  }
  14