diff options
Diffstat (limited to 'ohmd/ohm-plugin.c')
| -rw-r--r-- | ohmd/ohm-plugin.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/ohmd/ohm-plugin.c b/ohmd/ohm-plugin.c new file mode 100644 index 0000000..83c1c82 --- /dev/null +++ b/ohmd/ohm-plugin.c @@ -0,0 +1,177 @@ +/* + * Copyright (C) 2007 Richard Hughes <richard@hughsie.com> + * + * Licensed under the GNU General Public License Version 2 + * + * This program 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 2.1 of the License, or (at your option) any later version. + * + * This program 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 + */ + +#include <string.h> +#include <unistd.h> +#include <glib.h> +#include <glib-object.h> +#include <gmodule.h> + +#include "ohm-plugin.h" + +static void ohm_plugin_destroy (OhmPlugin * plugin); +static OhmPlugin *ohm_plugins_find_with_name (const gchar * name); +static GList *plugins = NULL; + +#define LIBDIR ".libs" + +G_MODULE_EXPORT void +ohm_plugin_get_key (int value) +{ + /* do bar things */ + g_debug ("server! %i", value); +} + +OhmPlugin * +ohm_plugin_load (const gchar *name) +{ + OhmPlugin *plugin; + gchar *path; + GModule *handle; + + gboolean (*ohm_init_plugin) (OhmPlugin *); + + g_return_val_if_fail (name != NULL, NULL); + + plugin = ohm_plugins_find_with_name (name); + if (plugin) { + ++plugin->ref_count; + return plugin; + } + + path = g_build_filename (LIBDIR, name, NULL); + handle = g_module_open (path, 0); + if (!handle) { + g_error ("opening module %s failed : %s\n", path, g_module_error ()); + } + g_free (path); + + if (!g_module_symbol (handle, "ohm_init_plugin", (gpointer) & ohm_init_plugin)) { + g_module_close (handle); + g_error ("could not find init function in plugin\n"); + } + + plugin = g_new0 (OhmPlugin, 1); + plugin->info = NULL; + plugin->handle = handle; + plugin->name = g_strdup (name); + plugin->ref_count = 1; + plugins = g_list_append (plugins, plugin); + + if (!ohm_init_plugin (plugin) || plugin->info == NULL) { + g_print ("init error or no info defined"); + ohm_plugin_destroy (plugin); + return NULL; + } + + if (plugin->info->load != NULL) + plugin->info->load (plugin); + + return plugin; +} + +gboolean +ohm_plugin_unload (OhmPlugin * plugin) +{ + g_return_val_if_fail (plugin != NULL, FALSE); + g_return_val_if_fail (plugin->ref_count > 0, FALSE); + + if (--plugin->ref_count > 0) + return TRUE; + + if (plugin->info->unload != NULL) + plugin->info->unload (plugin); + + ohm_plugin_destroy (plugin); + + return TRUE; +} + +static void +ohm_plugin_destroy (OhmPlugin * plugin) +{ + g_return_if_fail (plugin != NULL); + + plugins = g_list_remove (plugins, plugin); + + if (plugin->handle != NULL) + g_module_close (plugin->handle); + + if (plugin->name != NULL) + g_free (plugin->name); + + g_free (plugin); +} + +static OhmPlugin * +ohm_plugins_find_with_name (const gchar * name) +{ + OhmPlugin *plugin; + GList *l; + + for (l = plugins; l != NULL; l = l->next) { + plugin = l->data; + if (plugin->name != NULL && !strcmp (plugin->name, name)) + return plugin; + } + + return NULL; +} + +G_CONST_RETURN gchar * +ohm_plugin_get_name (OhmPlugin * plugin) +{ + g_return_val_if_fail (plugin != NULL, NULL); + + return plugin->name; +} + +G_CONST_RETURN gchar * +ohm_plugin_get_version (OhmPlugin * plugin) +{ + g_return_val_if_fail (plugin != NULL, NULL); + + return plugin->info->version; +} + +G_CONST_RETURN gchar * +ohm_plugin_get_author (OhmPlugin * plugin) +{ + g_return_val_if_fail (plugin != NULL, NULL); + + return plugin->info->author; +} +#if 0 + +/** + * main: + **/ +int +main (int argc, char *argv[]) +{ + g_type_init (); + +OhmPlugin *plugin; +plugin = ohm_plugin_load ("libpluginbattery.so"); +ohm_plugin_unload (plugin); + + return 0; +} +#endif |