minix/lib/libtimers/tmrs_exp.c

   1 #include "timers.h"
   2
   3 /*===========================================================================*
   4  *                              tmrs_exptimers                               *
   5  *===========================================================================*/
   6 void tmrs_exptimers(tmrs, now, new_head)
   7 minix_timer_t **tmrs;                           /* pointer to timers queue */
   8 clock_t now;                            /* current time */
   9 clock_t *new_head;
  10 {
  11 /* Use the current time to check the timers queue list for expired timers.
  12  * Run the watchdog functions for all expired timers and deactivate them.
  13  * The caller is responsible for scheduling a new alarm if needed.
  14  */
  15   minix_timer_t *tp;
  16
  17   while ((tp = *tmrs) != NULL && tp->tmr_exp_time <= now) {
  18         *tmrs = tp->tmr_next;
  19         tp->tmr_exp_time = TMR_NEVER;
  20         (*tp->tmr_func)(tp);
  21   }
  22
  23   if(new_head) {
  24         if(*tmrs)
  25                 *new_head = (*tmrs)->tmr_exp_time;
  26         else
  27                 *new_head = 0;
  28   }
  29 }
  30
  31