libswfdec/swfdec_cached.c

   1 /* Swfdec
   2  * Copyright (C) 2007 Benjamin Otte <otte@gnome.org>
   3  *
   4  * This library 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  * This library 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 this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301  USA
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "swfdec_cached.h"
  25 #include "swfdec_debug.h"
  26
  27
  28 G_DEFINE_ABSTRACT_TYPE (SwfdecCached, swfdec_cached, SWFDEC_TYPE_CHARACTER)
  29
  30 static void
  31 swfdec_cached_dispose (GObject *object)
  32 {
  33   SwfdecCached * cached = SWFDEC_CACHED (object);
  34
  35   swfdec_cached_set_cache (cached, NULL);
  36
  37   G_OBJECT_CLASS (swfdec_cached_parent_class)->dispose (object);
  38 }
  39
  40 static void
  41 swfdec_cached_class_init (SwfdecCachedClass * g_class)
  42 {
  43   GObjectClass *object_class = G_OBJECT_CLASS (g_class);
  44
  45   object_class->dispose = swfdec_cached_dispose;
  46 }
  47
  48 static void
  49 swfdec_cached_init (SwfdecCached * cached)
  50 {
  51 }
  52
  53 void
  54 swfdec_cached_set_cache (SwfdecCached *cached, SwfdecCache *cache)
  55 {
  56   g_return_if_fail (SWFDEC_IS_CACHED (cached));
  57
  58   if (cached->cache) {
  59     if (cached->handle.unload)
  60       swfdec_cache_remove_handle (cached->cache, &cached->handle);
  61     swfdec_cache_unref (cached->cache);
  62   }
  63   cached->cache = cache;
  64   if (cache) {
  65     swfdec_cache_ref (cache);
  66     if (cached->handle.unload)
  67       swfdec_cache_add_handle (cached->cache, &cached->handle);
  68   }
  69 }
  70
  71 static void
  72 swfdec_cached_unload_func (gpointer data)
  73 {
  74   SwfdecCached *cached = SWFDEC_CACHED ((guint8 *) data - G_STRUCT_OFFSET (SwfdecCached, handle));
  75
  76   cached->handle.unload = NULL;
  77   swfdec_cached_unload (cached);
  78 }
  79
  80 void
  81 swfdec_cached_load (SwfdecCached *cached, guint size)
  82 {
  83   g_return_if_fail (SWFDEC_IS_CACHED (cached));
  84   g_return_if_fail (cached->handle.unload == NULL);
  85   g_return_if_fail (size > 0);
  86
  87   cached->handle.unload = swfdec_cached_unload_func;
  88   cached->handle.size = size;
  89   if (cached->cache)
  90     swfdec_cache_add_handle (cached->cache, &cached->handle);
  91 }
  92
  93 void
  94 swfdec_cached_use (SwfdecCached *cached)
  95 {
  96   g_return_if_fail (SWFDEC_IS_CACHED (cached));
  97   g_return_if_fail (cached->handle.unload != NULL);
  98
  99   if (cached->cache)
 100     swfdec_cache_add_handle (cached->cache, &cached->handle);
 101 }
 102
 103 void
 104 swfdec_cached_unload (SwfdecCached *cached)
 105 {
 106   g_return_if_fail (SWFDEC_IS_CACHED (cached));
 107
 108   if (cached->handle.unload) {
 109     if (cached->cache)
 110       swfdec_cache_remove_handle (cached->cache, &cached->handle);
 111     cached->handle.unload = NULL;
 112   }
 113   if (cached->handle.size) {
 114     SwfdecCachedClass *klass;
 115
 116     klass = SWFDEC_CACHED_GET_CLASS (cached);
 117     cached->handle.size = 0;
 118     g_return_if_fail (klass->unload != NULL);
 119     klass->unload (cached);
 120   }
 121 }
 122