timer.c

   1 #include <signal.h>
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4
   5 #include "include/log.h"
   6 #include "include/list.h"
   7 #include "include/timer.h"
   8 #include "include/ucix.h"
   9
  10 /* when using this file, alarm() is used */
  11
  12 static struct list_head timers;
  13
  14 struct timer {
  15         struct list_head list;
  16         int count;
  17         int timeout;
  18         timercb_t timercb;
  19 };
  20
  21 void timer_add(timercb_t timercb, int timeout)
  22 {
  23         struct timer *timer;
  24         timer = malloc(sizeof(struct timer));
  25         if(!timer)
  26         {
  27                 log_printf("unable to get timer buffer\n");
  28                 return;
  29         }
  30         timer->count = 0;
  31         timer->timeout = timeout;
  32         timer->timercb = timercb;
  33         INIT_LIST_HEAD(&timer->list);
  34         list_add(&timer->list, &timers);
  35 }
  36
  37 static void timer_proc(int signo)
  38 {
  39         struct list_head *p;
  40         list_for_each(p, &timers)
  41         {
  42                 struct timer *q = container_of(p, struct timer, list);
  43                 q->count++;
  44                 if(!(q->count%q->timeout))
  45                 {
  46                         q->timercb();
  47                 }
  48         }
  49         alarm(1);
  50 }
  51
  52 void timer_init(void)
  53 {
  54         struct sigaction s;
  55         INIT_LIST_HEAD(&timers);
  56         s.sa_handler = timer_proc;
  57         s.sa_flags = 0;
  58         sigaction(SIGALRM, &s, NULL);
  59         alarm(1);
  60 }