gplugin/gplugin

A few updates to cleanup a bunch of code in libpurple.
feature/unload-failed-state
2020-04-10, Gary Kramlich
5a05c6354d62
A few updates to cleanup a bunch of code in libpurple.

* Add a new plugin state UNLOAD_FAILED that tracks when a plugin failed to
unload.
* Add a new signal GPluginManager::unload-plugin-failed
* Update GPluginManager::load-failed to pass the error, if any, that the
plugin returned.
* Added gplugin_manager_foreach and GPluginManagerForeachFunc to make it
easier to operate on all plugins.
/*
* Copyright (C) 2011-2020 Gary Kramlich <grim@reaperworld.com>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#if !defined(GPLUGIN_GLOBAL_HEADER_INSIDE) && !defined(GPLUGIN_COMPILATION)
#error "only <gplugin.h> may be included directly"
#endif
#ifndef GPLUGIN_OPTIONS_H
#define GPLUGIN_OPTIONS_H
#include <glib.h>
G_BEGIN_DECLS
GOptionGroup *gplugin_get_option_group(void);
G_END_DECLS
#endif /* GPLUGIN_OPTIONS_H */