x5/khatus_lib_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 "khatus_lib_log.h"
   9 #include "khatus_lib_time.h"
  10
  11 struct timespec
  12 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 snooze(struct timespec *t)
  27 {
  28         struct timespec remainder;
  29         int result;
  30
  31         result = nanosleep(t, &remainder);
  32
  33         if (result < 0) {
  34                 if (errno == EINTR) {
  35                         warn(
  36                             "nanosleep interrupted. Remainder: "
  37                             "{ tv_sec = %ld, tv_nsec = %ld }",
  38                             remainder.tv_sec, remainder.tv_nsec);
  39                         /* No big deal if we occasionally sleep less,
  40                          * so not attempting to correct after an interruption.
  41                          */
  42                 } else {
  43                         fatal("nanosleep: %s\n", strerror(errno));
  44                 }
  45         }
  46 }