minix/lib/libtimers/tmrs_exp.c

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