Line data    Source code

       1             : #include "timerlib.h"
       2             : #include <stdio.h>
       3             : 
       4           0 : void timerlib_timespec_add(timerlib_timespec_t * a, const timerlib_timespec_t * b)
       5             : {
       6           0 :     a->tv_sec += b->tv_sec;
       7           0 :     a->tv_nsec += b->tv_nsec;
       8           0 :     if (a->tv_nsec > TIMERLIB_BILLION_L) {
       9           0 :         a->tv_nsec -= TIMERLIB_BILLION_L;
      10           0 :         a->tv_sec++;
      11             :     }
      12           0 : }
      13             : 
      14           0 : void timerlib_timespec_subtract(timerlib_timespec_t * a, const timerlib_timespec_t * b)
      15             : {
      16           0 :     a->tv_sec -= b->tv_sec;
      17           0 :     if (a->tv_nsec < b->tv_nsec) {
      18           0 :         a->tv_sec--;
      19           0 :         a->tv_nsec += TIMERLIB_BILLION_L - b->tv_nsec;
      20             :     } else {
      21           0 :         a->tv_nsec -= b->tv_nsec;
      22             :     }
      23           0 : }
      24             : 
      25          54 : void timerlib_timespec_from_double(timerlib_timespec_t * dest, double source)
      26             : {
      27             :     double fractional, integral;
      28          54 :     if (source < 0) {
      29           0 :         dest->tv_sec = dest->tv_nsec = 0;
      30           0 :         return;
      31             :     }
      32             : 
      33          54 :     fractional = modf(source, &integral);
      34          54 :     dest->tv_sec = (time_t)integral;
      35          54 :     dest->tv_nsec = (long)(fractional * 1e9);
      36          54 :     if (dest->tv_nsec >= TIMERLIB_BILLION_L) {
      37           0 :         dest->tv_nsec -= TIMERLIB_BILLION_L;
      38           0 :         dest->tv_sec ++;
      39             :     }
      40             : }
      41             : 
      42           0 : int timerlib_timer_start_oneshot(timerlib_timer_t *timer, timerlib_timespec_t *duration)
      43             : {
      44           0 :     timerlib_timespec_t period = {0};
      45           0 :     return timerlib_timer_start(timer, &period, duration);
      46             : }
      47             : 
      48           0 : int timerlib_timer_start_periodic(timerlib_timer_t *timer, timerlib_timespec_t *period)
      49             : {
      50           0 :     return timerlib_timer_start(timer, period, period);
      51             : }