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   1 #include "config.h"
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 /**
   6  * time - routines for dealing with time
   7  *
   8  * This code provides convenient functions for working with time, in the
   9  * form of 'struct timerel' for durations and 'struct timeabs' for timestamps
  10  * which are light wrappers around struct timespec.
  11  *
  12  * Author: Rusty Russell <rusty@rustcorp.com.au>
  13  * License: BSD-MIT
  14  *
  15  * Example:
  16  *      #include <ccan/time/time.h>
  17  *      #include <stdlib.h>
  18  *      #include <stdio.h>
  19  *      #include <err.h>
  20  *
  21  *      int main(int argc, char *argv[])
  22  *      {
  23  *              struct timeabs t;
  24  *
  25  *              if (argc != 2)
  26  *                      errx(1, "Usage: %s <diff in millisec>", argv[0]);
  27  *
  28  *              t = time_now();
  29  *              if (argv[1][0] == '-')
  30  *                      t = timeabs_sub(t, time_from_msec(atol(argv[1]+1)));
  31  *              else
  32  *                      t = timeabs_add(t, time_from_msec(atol(argv[1])));
  33  *
  34  *              printf("%lu.%09u\n",
  35  *                     (unsigned long)t.ts.tv_sec, (unsigned)t.ts.tv_nsec);
  36  *              return 0;
  37  *      }
  38  */
  39 int main(int argc, char *argv[])
  40 {
  41         /* Expect exactly one argument */
  42         if (argc != 2)
  43                 return 1;
  44
  45         if (strcmp(argv[1], "depends") == 0) {
  46                 return 0;
  47         }
  48
  49 #if HAVE_CLOCK_GETTIME_IN_LIBRT
  50         if (strcmp(argv[1], "libs") == 0) {
  51                 printf("rt\n");
  52                 return 0;
  53         }
  54 #endif
  55
  56         return 1;
  57 }