/* vi:set et ai sw=2 sts=2 ts=2: */ /*- * Copyright (c) 2006-2009 Jannis Pohlmann * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Library General Public License for more details. * * You should have received a copy of the GNU Library General * Public License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifdef HAVE_CONFIG_H #include #endif #ifdef HAVE_ERRNO_H #include #endif #ifdef HAVE_FCNTL_H #include #endif #ifdef HAVE_MEMORY_H #include #endif #ifdef HAVE_STDLIB_H #include #endif #ifdef HAVE_STRING_H #include #endif #include #include static void garcon_menu_item_cache_finalize (GObject *object); /* Object Mutex Lock */ #define _item_cache_lock(cache) g_mutex_lock (&((cache)->priv->lock)) #define _item_cache_unlock(cache) g_mutex_unlock (&((cache)->priv->lock)) struct _GarconMenuItemCachePrivate { /* Hash table for mapping absolute filenames to GarconMenuItem's */ GHashTable *items; GMutex lock; }; G_DEFINE_TYPE_WITH_PRIVATE (GarconMenuItemCache, garcon_menu_item_cache, G_TYPE_OBJECT) static void garcon_menu_item_cache_class_init (GarconMenuItemCacheClass *klass) { GObjectClass *gobject_class; gobject_class = G_OBJECT_CLASS (klass); gobject_class->finalize = garcon_menu_item_cache_finalize; } static void garcon_menu_item_cache_init (GarconMenuItemCache *cache) { cache->priv = garcon_menu_item_cache_get_instance_private (cache); g_mutex_init (&cache->priv->lock); /* Create empty hash table */ cache->priv->items = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, (GDestroyNotify) garcon_menu_item_unref); } /** * garcon_menu_item_cache_get_default: (constructor) * * Returns the default #GarconMenuItemCache. the returned object * should be unreffed with g_object_unref() when no longer needed. * * Returns: (transfer full): a new #GarconMenuItemCache. */ GarconMenuItemCache* garcon_menu_item_cache_get_default (void) { static GarconMenuItemCache *cache = NULL; if (G_UNLIKELY (cache == NULL)) { /* Create a new cache */ cache = g_object_new (GARCON_TYPE_MENU_ITEM_CACHE, NULL); g_object_add_weak_pointer (G_OBJECT (cache), (gpointer) &cache); } else { /* Take a reference */ g_object_ref (G_OBJECT (cache)); } return cache; } static void garcon_menu_item_cache_finalize (GObject *object) { GarconMenuItemCache *cache = GARCON_MENU_ITEM_CACHE (object); /* Free hash table */ g_hash_table_unref (cache->priv->items); /*Release the mutex */ g_mutex_clear (&cache->priv->lock); (*G_OBJECT_CLASS (garcon_menu_item_cache_parent_class)->finalize) (object); } /** * garcon_menu_item_cache_lookup: * @cache: a #GarconMenuItemCache * @uri: * @desktop_id * * Returns: (transfer full) (nullable): a #GarconMenuItem */ GarconMenuItem* garcon_menu_item_cache_lookup (GarconMenuItemCache *cache, const gchar *uri, const gchar *desktop_id) { GarconMenuItem *item = NULL; g_return_val_if_fail (GARCON_IS_MENU_ITEM_CACHE (cache), NULL); g_return_val_if_fail (uri != NULL, NULL); g_return_val_if_fail (desktop_id != NULL, NULL); /* Acquire lock on the item cache as it's likely that we need to load * items from the hard drive and store it in the hash table of the * item cache */ _item_cache_lock (cache); /* Search uri in the hash table */ item = g_hash_table_lookup (cache->priv->items, uri); /* Return the item if we we found one */ if (item != NULL) { /* Update desktop id, if necessary */ garcon_menu_item_set_desktop_id (item, desktop_id); /* Release item cache lock */ _item_cache_unlock (cache); return item; } /* Last chance is to load it directly from the file */ item = garcon_menu_item_new_for_uri (uri); if (G_LIKELY (item != NULL)) { /* Update desktop id */ garcon_menu_item_set_desktop_id (item, desktop_id); /* The file has been loaded, add the item to the hash table */ g_hash_table_replace (cache->priv->items, g_strdup (uri), item); } /* Release item cache lock */ _item_cache_unlock (cache); return item; } /** * garcon_menu_item_cache_foreach: * @cache: a #GarconMenuItemCache * @func: (scope call): * @user_data: parameter passed to @func callback */ void garcon_menu_item_cache_foreach (GarconMenuItemCache *cache, GHFunc func, gpointer user_data) { g_return_if_fail (GARCON_IS_MENU_ITEM_CACHE (cache)); /* Acquire lock on the item cache */ _item_cache_lock (cache); g_hash_table_foreach (cache->priv->items, func, user_data); /* Release item cache lock */ _item_cache_unlock (cache); } void garcon_menu_item_cache_invalidate (GarconMenuItemCache *cache) { g_return_if_fail (GARCON_IS_MENU_ITEM_CACHE (cache)); /* Acquire lock on the item cache */ _item_cache_lock (cache); /* Remove all items from the hash table */ g_hash_table_remove_all (cache->priv->items); /* Release item cache lock */ _item_cache_unlock (cache); } void garcon_menu_item_cache_invalidate_file (GarconMenuItemCache *cache, GFile *file) { gchar *uri; g_return_if_fail (GARCON_IS_MENU_ITEM_CACHE (cache)); g_return_if_fail (G_IS_FILE (file)); uri = g_file_get_uri (file); /* Acquire a lock on the item cache */ _item_cache_lock (cache); /* Remove possible items with this URI from the cache */ g_hash_table_remove (cache->priv->items, uri); /* Release the item cache lock */ _item_cache_unlock (cache); g_free (uri); }