1 files changed, 161 insertions, 0 deletions
diff --git a/libmatemixer/matemixer-backend-module.c b/libmatemixer/matemixer-backend-module.c
new file mode 100644
index 0000000..0acd786
--- /dev/null
+++ b/libmatemixer/matemixer-backend-module.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ *
+ * 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 licence, 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gmodule.h>
+
+#include "matemixer-backend.h"
+#include "matemixer-backend-module.h"
+
+G_DEFINE_TYPE (MateMixerBackendModule, mate_mixer_backend_module, G_TYPE_TYPE_MODULE);
+
+struct _MateMixerBackendModulePrivate
+{
+ GModule *gmodule;
+ gchar *path;
+
+ void (*init) (GTypeModule *type_module);
+ void (*free) (void);
+
+ const MateMixerBackendModuleInfo *(*get_info) (void);
+};
+
+static gboolean mate_mixer_backend_module_load (GTypeModule *gmodule);
+static void mate_mixer_backend_module_unload (GTypeModule *gmodule);
+
+static void
+mate_mixer_backend_module_init (MateMixerBackendModule *module)
+{
+ module->priv = G_TYPE_INSTANCE_GET_PRIVATE (
+ module,
+ MATE_MIXER_TYPE_BACKEND_MODULE,
+ MateMixerBackendModulePrivate);
+}
+
+static void
+mate_mixer_backend_module_finalize (GObject *object)
+{
+ MateMixerBackendModule *module;
+
+ module = MATE_MIXER_BACKEND_MODULE (object);
+
+ g_free (module->priv->path);
+
+ G_OBJECT_CLASS (mate_mixer_backend_module_parent_class)->finalize (object);
+}
+
+static void
+mate_mixer_backend_module_class_init (MateMixerBackendModuleClass *klass)
+{
+ GObjectClass *object_class;
+ GTypeModuleClass *gtype_class;
+
+ object_class = G_OBJECT_CLASS (klass);
+ object_class->finalize = mate_mixer_backend_module_finalize;
+
+ gtype_class = G_TYPE_MODULE_CLASS (klass);
+ gtype_class->load = mate_mixer_backend_module_load;
+ gtype_class->unload = mate_mixer_backend_module_unload;
+
+ g_type_class_add_private (object_class, sizeof (MateMixerBackendModulePrivate));
+}
+
+static gboolean
+mate_mixer_backend_module_load (GTypeModule *type_module)
+{
+ MateMixerBackendModule *module;
+
+ module = MATE_MIXER_BACKEND_MODULE (type_module);
+
+ module->priv->gmodule = g_module_open (
+ module->priv->path,
+ G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
+
+ if (module->priv->gmodule == NULL) {
+ g_warning ("Failed to load backend module %s: %s",
+ module->priv->path,
+ g_module_error ());
+
+ return FALSE;
+ }
+
+ /* Validate library symbols that each backend module must provide */
+ if (!g_module_symbol (module->priv->gmodule,
+ "backend_module_init",
+ (gpointer *) &module->priv->init) ||
+ !g_module_symbol (module->priv->gmodule,
+ "backend_module_free",
+ (gpointer *) &module->priv->free) ||
+ !g_module_symbol (module->priv->gmodule,
+ "backend_module_get_info",
+ (gpointer *) &module->priv->get_info)) {
+ g_warning ("Failed to load backend module %s: %s",
+ module->priv->path,
+ g_module_error ());
+
+ g_module_close (module->priv->gmodule);
+ return FALSE;
+ }
+
+ g_debug ("Loaded backend module %s", module->priv->path);
+
+ module->priv->init (type_module);
+ return TRUE;
+}
+
+static void
+mate_mixer_backend_module_unload (GTypeModule *type_module)
+{
+ MateMixerBackendModule *module;
+
+ module = MATE_MIXER_BACKEND_MODULE (type_module);
+ module->priv->free ();
+
+ g_module_close (module->priv->gmodule);
+}
+
+MateMixerBackendModule *
+mate_mixer_backend_module_new (const gchar *path)
+{
+ MateMixerBackendModule *module;
+
+ g_return_val_if_fail (path != NULL, NULL);
+
+ module = g_object_newv (MATE_MIXER_TYPE_BACKEND_MODULE, 0, NULL);
+ module->priv->path = g_strdup (path);
+
+ g_type_module_set_name (G_TYPE_MODULE (module), path);
+
+ return module;
+}
+
+const MateMixerBackendModuleInfo *
+mate_mixer_backend_module_get_info (MateMixerBackendModule *module)
+{
+ g_return_val_if_fail (MATE_MIXER_IS_BACKEND_MODULE (module), NULL);
+
+ return module->priv->get_info ();
+}
+
+const gchar *
+mate_mixer_backend_module_get_path (MateMixerBackendModule *module)
+{
+ g_return_val_if_fail (MATE_MIXER_IS_BACKEND_MODULE (module), NULL);
+
+ return module->priv->path;
+}