x5/khatus_lib_time.c

   1 #include <errno.h>
   2 #include <math.h>
   3 #include <stdio.h>
   4 #include <string.h>
   5 #include <time.h>
   6
   7 #include "khatus_lib_log.h"
   8 #include "khatus_lib_time.h"
   9
  10 struct timespec
  11 timespec_of_float(double n)
  12 {
  13         double integral;
  14         double fractional;
  15         struct timespec t;
  16
  17         fractional = modf(n, &integral);
  18         t.tv_sec = (int) integral;
  19         t.tv_nsec = (int) (1E9 * fractional);
  20
  21         return t;
  22 }
  23
  24 void
  25 snooze(struct timespec *t)
  26 {
  27         struct timespec remainder;
  28         int result;
  29
  30         result = nanosleep(t, &remainder);
  31
  32         if (result < 0) {
  33                 if (errno == EINTR) {
  34                         warn(
  35                             "nanosleep interrupted. Remainder: "
  36                             "{ tv_sec = %ld, tv_nsec = %ld }",
  37                             remainder.tv_sec, remainder.tv_nsec);
  38                         /* No big deal if we occasionally sleep less,
  39                          * so not attempting to correct after an interruption.
  40                          */
  41                 } else {
  42                         fatal("nanosleep: %s\n", strerror(errno));
  43                 }
  44         }
  45 }