Imported Upstream version 1.0.0 upstream/1.0.0

1 files changed, 90 insertions, 0 deletions

diff --git a/libnm/nm-object-cache.c b/libnm/nm-object-cache.c
new file mode 100644
index 00000000..752c606a
--- /dev/null
+++ b/libnm/nm-object-cache.c
@@ -0,0 +1,90 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
+/*
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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.
+ *
+ * Copyright 2008 Red Hat, Inc.
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <glib.h>
+#include "nm-object-cache.h"
+#include "nm-object.h"
+
+static GHashTable *cache = NULL;
+
+static void
+_init_cache (void)
+{
+	if (G_UNLIKELY (cache == NULL))
+		cache = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
+}
+
+static void
+_nm_object_cache_remove_by_path (char *path)
+{
+	_init_cache ();
+	g_hash_table_remove (cache, path);
+	g_free (path);
+}
+
+void
+_nm_object_cache_add (NMObject *object)
+{
+	char *path;
+
+	_init_cache ();
+	path = g_strdup (nm_object_get_path (object));
+	g_hash_table_insert (cache, path, object);
+	g_object_set_data_full (G_OBJECT (object), "nm-object-cache-tag",
+	                        g_strdup (path), (GDestroyNotify) _nm_object_cache_remove_by_path);
+}
+
+NMObject *
+_nm_object_cache_get (const char *path)
+{
+	NMObject *object;
+
+	_init_cache ();
+	object = g_hash_table_lookup (cache, path);
+	return object ? g_object_ref (object) : NULL;
+}
+
+void
+_nm_object_cache_clear (void)
+{
+	GHashTableIter iter;
+	GObject *obj;
+	const char *path;
+	char *foo;
+
+	if (!cache)
+		return;
+
+	g_hash_table_iter_init (&iter, cache);
+	while (g_hash_table_iter_next (&iter, (gpointer) &path, (gpointer) &obj)) {
+		/* Remove the callback so that if the object isn't yet released
+		 * by a client, when it does finally get unrefed, it won't trigger
+		 * the cache removal for a new object with the same path as the
+		 * one being released.
+		 */
+		foo = g_object_steal_data (obj, "nm-object-cache-tag");
+		g_free (foo);
+
+		g_hash_table_iter_remove (&iter);
+	}
+}