src/win32/timer.c

   1 /*****************************************************************************
   2  * timer.c : Win32 timers for LibVLC
   3  *****************************************************************************
   4  * Copyright (C) 2009-2016 Rémi Denis-Courmont
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 #ifdef HAVE_CONFIG_H
  22 # include "config.h"
  23 #endif
  24
  25 #include <assert.h>
  26 #include <stdlib.h>
  27 #include <windows.h>
  28 #include <vlc_common.h>
  29
  30 struct vlc_timer
  31 {
  32     HANDLE handle;
  33     void (*func) (void *);
  34     void *data;
  35 };
  36
  37 static void CALLBACK vlc_timer_do (void *val, BOOLEAN timeout)
  38 {
  39     struct vlc_timer *timer = val;
  40
  41     assert (timeout);
  42     timer->func (timer->data);
  43 }
  44
  45 int vlc_timer_create (vlc_timer_t *id, void (*func) (void *), void *data)
  46 {
  47     struct vlc_timer *timer = malloc (sizeof (*timer));
  48
  49     if (timer == NULL)
  50         return ENOMEM;
  51     timer->func = func;
  52     timer->data = data;
  53     timer->handle = INVALID_HANDLE_VALUE;
  54     *id = timer;
  55     return 0;
  56 }
  57
  58 void vlc_timer_destroy (vlc_timer_t timer)
  59 {
  60     if (timer->handle != INVALID_HANDLE_VALUE)
  61         DeleteTimerQueueTimer (NULL, timer->handle, INVALID_HANDLE_VALUE);
  62     free (timer);
  63 }
  64
  65 void vlc_timer_schedule (vlc_timer_t timer, bool absolute,
  66                          mtime_t value, mtime_t interval)
  67 {
  68     if (timer->handle != INVALID_HANDLE_VALUE)
  69     {
  70         DeleteTimerQueueTimer (NULL, timer->handle, INVALID_HANDLE_VALUE);
  71         timer->handle = INVALID_HANDLE_VALUE;
  72     }
  73     if (value == 0)
  74         return; /* Disarm */
  75
  76     if (absolute)
  77     {
  78         value -= mdate ();
  79         if (value < 0)
  80             value = 0;
  81     }
  82     value = (value + 999) / 1000;
  83     interval = (interval + 999) / 1000;
  84
  85     if (!CreateTimerQueueTimer (&timer->handle, NULL, vlc_timer_do, timer,
  86                                 value, interval, WT_EXECUTEDEFAULT))
  87         abort ();
  88 }
  89
  90 unsigned vlc_timer_getoverrun (vlc_timer_t timer)
  91 {
  92     (void)timer;
  93     return 0;
  94 }