load_math/load_math.c

   1 #include <signal.h>
   2 #include <stdlib.h>
   3 #include <stdio.h>
   4 #include <unistd.h>
   5 #include <string.h>
   6 #include <sys/time.h>
   7 #include <time.h>
   8 #include <math.h>
   9
  10 double global_v;
  11
  12 static void alarm_handler(int sig)
  13 {
  14         struct timeval tv;
  15         gettimeofday(&tv,NULL);
  16         double v = tan(sin(cos(tv.tv_sec)));
  17         v *= 1.3;
  18         global_v = v;
  19 }
  20
  21 void _init(void)
  22 {
  23         struct timeval tv;
  24         struct itimerval val;
  25         tv.tv_sec = 0;
  26         tv.tv_usec = 1;
  27         val.it_interval = tv;
  28         val.it_value = tv;
  29
  30         setitimer(ITIMER_REAL, &val, NULL);
  31         signal(SIGALRM, alarm_handler);
  32 }