lib/libtimers/tmrs_clr.c

   1 #include "timers.h"
   2
   3 /*===========================================================================*
   4  *                              tmrs_clrtimer                                *
   5  *===========================================================================*/
   6 clock_t tmrs_clrtimer(tmrs, tp, next_time)
   7 timer_t **tmrs;                         /* pointer to timers queue */
   8 timer_t *tp;                            /* timer to be removed */
   9 clock_t *next_time;
  10 {
  11 /* Deactivate a timer and remove it from the timers queue.
  12  */
  13   timer_t **atp;
  14   clock_t prev_time;
  15
  16   if(*tmrs)
  17         prev_time = (*tmrs)->tmr_exp_time;
  18   else
  19         prev_time = 0;
  20
  21   tp->tmr_exp_time = TMR_NEVER;
  22
  23   for (atp = tmrs; *atp != NULL; atp = &(*atp)->tmr_next) {
  24         if (*atp == tp) {
  25                 *atp = tp->tmr_next;
  26                 break;
  27         }
  28   }
  29
  30   if(next_time) {
  31         if(*tmrs)
  32                 *next_time = (*tmrs)->tmr_exp_time;
  33         else
  34                 *next_time = 0;
  35   }
  36
  37   return prev_time;
  38 }
  39