1 /* GIO - GLib Input, Output and Streaming Library
3 * Copyright (C) 2006-2007 Red Hat, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 * Author: Alexander Larsson <alexl@redhat.com>
21 #ifndef __G_IO_MODULE_H__
22 #define __G_IO_MODULE_H__
24 #if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
25 #error "Only <gio/gio.h> can be included directly."
28 #include <gio/giotypes.h>
33 typedef struct _GIOModuleScope GIOModuleScope;
35 GLIB_AVAILABLE_IN_2_30
36 GIOModuleScope * g_io_module_scope_new (GIOModuleScopeFlags flags);
37 GLIB_AVAILABLE_IN_2_30
38 void g_io_module_scope_free (GIOModuleScope *scope);
39 GLIB_AVAILABLE_IN_2_30
40 void g_io_module_scope_block (GIOModuleScope *scope,
41 const gchar *basename);
43 #define G_IO_TYPE_MODULE (g_io_module_get_type ())
44 #define G_IO_MODULE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_IO_TYPE_MODULE, GIOModule))
45 #define G_IO_MODULE_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_IO_TYPE_MODULE, GIOModuleClass))
46 #define G_IO_IS_MODULE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_IO_TYPE_MODULE))
47 #define G_IO_IS_MODULE_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_IO_TYPE_MODULE))
48 #define G_IO_MODULE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_IO_TYPE_MODULE, GIOModuleClass))
53 * Opaque module base class for extending GIO.
55 typedef struct _GIOModuleClass GIOModuleClass;
58 GType g_io_module_get_type (void) G_GNUC_CONST;
60 GIOModule *g_io_module_new (const gchar *filename);
63 void g_io_modules_scan_all_in_directory (const char *dirname);
65 GList *g_io_modules_load_all_in_directory (const gchar *dirname);
67 GLIB_AVAILABLE_IN_2_30
68 void g_io_modules_scan_all_in_directory_with_scope (const gchar *dirname,
69 GIOModuleScope *scope);
70 GLIB_AVAILABLE_IN_2_30
71 GList *g_io_modules_load_all_in_directory_with_scope (const gchar *dirname,
72 GIOModuleScope *scope);
75 GIOExtensionPoint *g_io_extension_point_register (const char *name);
77 GIOExtensionPoint *g_io_extension_point_lookup (const char *name);
79 void g_io_extension_point_set_required_type (GIOExtensionPoint *extension_point,
82 GType g_io_extension_point_get_required_type (GIOExtensionPoint *extension_point);
84 GList *g_io_extension_point_get_extensions (GIOExtensionPoint *extension_point);
86 GIOExtension * g_io_extension_point_get_extension_by_name (GIOExtensionPoint *extension_point,
89 GIOExtension * g_io_extension_point_implement (const char *extension_point_name,
91 const char *extension_name,
95 GType g_io_extension_get_type (GIOExtension *extension);
97 const char * g_io_extension_get_name (GIOExtension *extension);
99 gint g_io_extension_get_priority (GIOExtension *extension);
100 GLIB_AVAILABLE_IN_ALL
101 GTypeClass* g_io_extension_ref_class (GIOExtension *extension);
104 /* API for the modules to implement */
108 * @module: a #GIOModule.
110 * Required API for GIO modules to implement.
112 * This function is run after the module has been loaded into GIO,
113 * to initialize the module. Typically, this function will call
114 * g_io_extension_point_implement().
116 GLIB_AVAILABLE_IN_ALL
117 void g_io_module_load (GIOModule *module);
120 * g_io_module_unload:
121 * @module: a #GIOModule.
123 * Required API for GIO modules to implement.
125 * This function is run when the module is being unloaded from GIO,
126 * to finalize the module.
128 GLIB_AVAILABLE_IN_ALL
129 void g_io_module_unload (GIOModule *module);
134 * Optional API for GIO modules to implement.
136 * Should return a list of all the extension points that may be
137 * implemented in this module.
139 * This method will not be called in normal use, however it may be
140 * called when probing existing modules and recording which extension
141 * points that this model is used for. This means we won't have to
142 * load and initialize this module unless its needed.
144 * If this function is not implemented by the module the module will
145 * always be loaded, initialized and then unloaded on application
146 * startup so that it can register its extension points during init.
148 * Note that a module need not actually implement all the extension
149 * points that g_io_module_query() returns, since the exact list of
150 * extension may depend on runtime issues. However all extension
151 * points actually implemented must be returned by g_io_module_query()
154 * When installing a module that implements g_io_module_query() you must
155 * run gio-querymodules in order to build the cache files required for
158 * Returns: (transfer full): A %NULL-terminated array of strings,
159 * listing the supported extension points of the module. The array
160 * must be suitable for freeing with g_strfreev().
164 GLIB_AVAILABLE_IN_ALL
165 char **g_io_module_query (void);
169 #endif /* __G_IO_MODULE_H__ */