x5/khlib_time.c

   1 #include <errno.h>
   2 #include <math.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <time.h>
   7
   8 #include "khlib_log.h"
   9 #include "khlib_time.h"
  10
  11 struct timespec
  12 khlib_timespec_of_float(double n)
  13 {
  14         double integral;
  15         double fractional;
  16         struct timespec t;
  17
  18         fractional = modf(n, &integral);
  19         t.tv_sec = (int) integral;
  20         t.tv_nsec = (int) (1E9 * fractional);
  21
  22         return t;
  23 }
  24
  25 void
  26 khlib_sleep(struct timespec *t)
  27 {
  28         struct timespec remainder;
  29
  30         if (nanosleep(t, &remainder) < 0) {
  31                 if (errno == EINTR) {
  32                         khlib_warn(
  33                             "nanosleep interrupted. Remainder: "
  34                             "{ tv_sec = %ld, tv_nsec = %ld }",
  35                             remainder.tv_sec, remainder.tv_nsec);
  36                         /* No big deal if we occasionally sleep less,
  37                          * so not attempting to correct after an interruption.
  38                          */
  39                 } else {
  40                         khlib_fatal("nanosleep: %s\n", strerror(errno));
  41                 }
  42         }
  43 }