lib/timers/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   struct proc *p;
  15   clock_t prev_time;
  16
  17   if(*tmrs)
  18         prev_time = (*tmrs)->tmr_exp_time;
  19   else
  20         prev_time = 0;
  21
  22   tp->tmr_exp_time = TMR_NEVER;
  23
  24   for (atp = tmrs; *atp != NULL; atp = &(*atp)->tmr_next) {
  25         if (*atp == tp) {
  26                 *atp = tp->tmr_next;
  27                 break;
  28         }
  29   }
  30
  31   if(next_time) {
  32         if(*tmrs)
  33                 *next_time = (*tmrs)->tmr_exp_time;
  34         else
  35                 *next_time = 0;
  36   }
  37
  38   return prev_time;
  39 }
  40