misc/get_time.c

   1 #include <sys/time.h>
   2 #include <time.h>
   3
   4 double pbc_get_time(void) {
   5   static struct timeval last_tv, tv;
   6   static int first = 1;
   7   static double res = 0;
   8
   9   if (first) {
  10     gettimeofday(&last_tv, NULL);
  11     first = 0;
  12     return 0;
  13   } else {
  14     gettimeofday(&tv, NULL);
  15     res += tv.tv_sec - last_tv.tv_sec;
  16     res += (tv.tv_usec - last_tv.tv_usec) / 1000000.0;
  17     last_tv = tv;
  18
  19     return res;
  20   }
  21 }