timer.c

   1 /*
   2  * Copyright (C) 2009 Diego Hernan Borghetti.
   3  * Eco
   4  */
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 #include "list.h"
  10 #include "timer.h"
  11 #include "time.h"
  12
  13
  14 /* our timer list. */
  15 static E_List timer_list= { NULL, NULL };
  16
  17 /* intial time. */
  18 static double timer_time= 0.0;
  19
  20 int e_timer_list(void)
  21 {
  22         if (timer_list.first)
  23                 return(1);
  24         return(0);
  25 }
  26
  27 void e_timer_exec(void)
  28 {
  29         E_Timer *t, *tn;
  30         double nt, delta;
  31
  32         if (timer_time == 0.0) {
  33                 timer_time= e_time_get();
  34                 return;
  35         }
  36
  37         nt= e_time_get();
  38         delta= nt - timer_time;
  39
  40         t= (E_Timer *)timer_list.first;
  41         while (t) {
  42                 tn= t->next;
  43                 t->ctime += delta;
  44
  45                 if (t->ctime >= t->time) {
  46                         t->ctime= 0.0;
  47                         (*t->exec)(t->id, t->data);
  48                 }
  49                 t= tn;
  50         }
  51         timer_time= nt;
  52 }
  53
  54 void e_timer_add(int id, double time, void (*fn)(int, void *), void *data)
  55 {
  56         E_Timer *t;
  57
  58         t= (E_Timer *)malloc(sizeof(E_Timer));
  59         t->next= NULL;
  60         t->prev= NULL;
  61         t->id= id;
  62         t->time= time;
  63         t->ctime= 0.0;
  64         t->exec= fn;
  65         t->data= data;
  66         E_LIST_ADD(&timer_list, t);
  67 }
  68
  69 void e_timer_rem(int id)
  70 {
  71         E_Timer *t;
  72
  73         t= (E_Timer *)timer_list.first;
  74         while (t) {
  75                 if (t->id == id)
  76                         break;
  77                 t= t->next;
  78         }
  79
  80         if (t) {
  81                 E_LIST_REM(&timer_list, t);
  82                 free((void *)t);
  83         }
  84 }