examples/gras/timer/timer.c

   1 /* timer: repetitive and delayed actions                                    */
   2
   3 /* Copyright (c) 2005, 2007, 2009, 2010. The SimGrid Team.
   4  * All rights reserved.                                                     */
   5
   6 /* This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the license (GNU LGPL) which comes with this package. */
   8
   9 int client(int argc, char *argv[]);     /* Placed here to not bother doxygen inclusion */
  10
  11 #include "gras.h"
  12
  13 XBT_LOG_NEW_DEFAULT_CATEGORY(test, "Logging specific to this test");
  14
  15 #define REPEAT_INTERVAL 1.0
  16 #define DELAY_INTERVAL 2.0
  17 #define LOOP_COUNT 5
  18
  19 typedef struct {
  20   int still_to_do;
  21 } my_globals;
  22
  23 static void repetitive_action(void)
  24 {
  25   my_globals *globals = (my_globals *) gras_userdata_get();
  26
  27   /* Stop if nothing to do yet */
  28   if (globals->still_to_do <= 0) {
  29     XBT_INFO("Repetitive_action has nothing to do yet");
  30     return;
  31   }
  32
  33   if (globals->still_to_do == 1) {
  34     /* Unregister myself if I'm done */
  35     gras_timer_cancel_repeat(REPEAT_INTERVAL, repetitive_action);
  36   }
  37
  38   XBT_INFO
  39       ("repetitive_action decrementing globals->still_to_do. New value: %d",
  40        globals->still_to_do - 1);
  41
  42   globals->still_to_do--;       /* should be the last line of the action since value=0 stops the program */
  43 }                               /* end_of_repetitive_action */
  44
  45 static void delayed_action(void)
  46 {
  47   my_globals *globals = (my_globals *) gras_userdata_get();
  48
  49   XBT_INFO("delayed_action setting globals->still_to_do to %d", LOOP_COUNT);
  50
  51   globals->still_to_do = LOOP_COUNT;
  52 }                               /* end_of_delayed_action */
  53
  54 int client(int argc, char *argv[])
  55 {
  56   my_globals *globals;
  57
  58   gras_init(&argc, argv);
  59   globals = gras_userdata_new(my_globals);
  60   globals->still_to_do = -1;
  61
  62   XBT_INFO("Programming the repetitive_action with a frequency of %f sec",
  63         REPEAT_INTERVAL);
  64   gras_timer_repeat(REPEAT_INTERVAL, repetitive_action);
  65
  66   XBT_INFO("Programming the delayed_action for after %f sec", DELAY_INTERVAL);
  67   gras_timer_delay(REPEAT_INTERVAL, delayed_action);
  68
  69   XBT_INFO("Have a rest");
  70   gras_os_sleep(DELAY_INTERVAL / 2.0);
  71
  72   XBT_INFO("Canceling the delayed_action.");
  73   gras_timer_cancel_delay(REPEAT_INTERVAL, delayed_action);
  74
  75   XBT_INFO("Re-programming the delayed_action for after %f sec",
  76         DELAY_INTERVAL);
  77   gras_timer_delay(REPEAT_INTERVAL, delayed_action);
  78
  79   while (globals->still_to_do == -1 ||  /* Before delayed action runs */
  80          globals->still_to_do >
  81          0 /* after delayed_action, and not enough repetitive_action */ ) {
  82
  83     XBT_DEBUG("Prepare to handle messages for 5 sec (still_to_do=%d)",
  84            globals->still_to_do);
  85     gras_msg_handle(5.0);
  86   }
  87   gras_exit();
  88   xbt_free(globals);
  89   return 0;
  90 }                               /* end_of_client */