Example

   The following example measures the duration of a process, then
   prints the resulting relative time and inaccuracy.

   utc_t               before, duration;
   reltimespec_t       tduration;
   timespec_t          iduration;

   /*
    *   Get the time before the start of the operation...
    */

   utc_gettime(&before);      /* Out: Before binary timestamp    */

   /*
    * ...Later...
    *
    * Subtract, getting the duration as a relative time.
    *
    *    NOTE: The NULL argument is used to obtain the current time.
    */

   utc_subtime(&duration,     /* Out: Duration rel bin timestamp  */
               (utc_t *)0,    /* In:  After binary timestamp      */
               &before);      /* In:  Before binary timestamp     */

   /*
    *    Convert the relative times to timespec structures...
    */

   utc_binreltime(&tduration, /* Out: Duration time timespec      */
                  &iduration, /* Out: Duration inacc timespec     */
                  &duration); /* In:  Duration rel bin timestamp  */

   /*
    *    Print the duration...
    */

   printf("%d.%04d", tduration.tv_sec, (tduration.tv_nsec/10000));

   if ((long)iduration.tv_sec == -1)
       printf("Iinf\n");
   else
   printf("I%d.%04d\n", iduration.tv_sec, (iduration.tv_nsec/100000));