demos/c_simple/timers.c

   1 /*****************************************************************************
   2  * This file is part of gfxprim library.                                     *
   3  *                                                                           *
   4  * Gfxprim is free software; you can redistribute it and/or                  *
   5  * modify it under the terms of the GNU Lesser General Public                *
   6  * License as published by the Free Software Foundation; either              *
   7  * version 2.1 of the License, or (at your option) any later version.        *
   8  *                                                                           *
   9  * Gfxprim is distributed in the hope that it will be useful,                *
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  12  * Lesser General Public License for more details.                           *
  13  *                                                                           *
  14  * You should have received a copy of the GNU Lesser General Public          *
  15  * License along with gfxprim; if not, write to the Free Software            *
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  17  * Boston, MA  02110-1301  USA                                               *
  18  *                                                                           *
  19  * Copyright (C) 2009-2013 Cyril Hrubis <metan@ucw.cz>                       *
  20  *                                                                           *
  21  *****************************************************************************/
  22
  23 /*
  24
  25   Simple example how to use raw timer priority queue.
  26
  27  */
  28
  29 #include <GP.h>
  30
  31 uint32_t callback1()
  32 {
  33         return 0;
  34 }
  35
  36 uint32_t callback3()
  37 {
  38         return random() % 30 + 1;
  39 }
  40
  41 #define MAX 10
  42
  43 int main(void)
  44 {
  45         GP_TIMER_DECLARE(oneshot, 30, 0, "Oneshot", callback1, NULL);
  46         GP_TIMER_DECLARE(recurrent, 0, 4, "Recurrent", callback1, NULL);
  47         GP_TIMER_DECLARE(random, 10, 0, "Random", callback3, NULL);
  48         GP_Timer timers[MAX];
  49         GP_Timer *queue = NULL;
  50         uint64_t now;
  51         int i, ret;
  52         char ids[MAX][8];
  53
  54         GP_SetDebugLevel(10);
  55
  56         GP_TimerQueueInsert(&queue, 0, &oneshot);
  57         GP_TimerQueueInsert(&queue, 0, &recurrent);
  58         GP_TimerQueueInsert(&queue, 0, &random);
  59
  60         for (i = 0; i < MAX; i++) {
  61                 timers[i].expires = MAX - i;
  62                 timers[i].period = 0;
  63                 timers[i].Callback = callback1;
  64                 timers[i].priv = NULL;
  65                 sprintf(ids[i], "Timer%i", MAX - i);
  66                 timers[i].id = ids[i];
  67                 GP_TimerQueueInsert(&queue, 0, &timers[i]);
  68         }
  69
  70         GP_TimerQueueDump(queue);
  71
  72         GP_TimerQueueRemove(&queue, &timers[MAX-1]);
  73
  74         GP_TimerQueueDump(queue);
  75
  76         for (now = 0; now < 100; now += 3) {
  77                 printf("NOW %u\n", (unsigned int) now);
  78                 printf("-------------------------------------\n");
  79                 ret = GP_TimerQueueProcess(&queue, now);
  80                 printf("Processed %i timer events\n", ret);
  81                 printf("--------------------------------------\n");
  82                 GP_TimerQueueDump(queue);
  83                 printf("--------------------------------------\n\n");
  84         }
  85
  86         return 0;
  87 }