glib/gio/giomodule.h

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/* GIO - GLib Input, Output and Streaming Library
*
* Copyright (C) 2006-2007 Red Hat, Inc.
*
* 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
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* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Alexander Larsson <alexl@redhat.com>
*/
#ifndef __G_IO_MODULE_H__
#define __G_IO_MODULE_H__
#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
#error "Only <gio/gio.h> can be included directly."
#endif
#include <gio/giotypes.h>
#include <gmodule.h>
G_BEGIN_DECLS
typedef struct _GIOModuleScope GIOModuleScope;
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GIOModuleScope * g_io_module_scope_new (GIOModuleScopeFlags flags);
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void g_io_module_scope_free (GIOModuleScope *scope);
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void g_io_module_scope_block (GIOModuleScope *scope,
const gchar *basename);
#define G_IO_TYPE_MODULE (g_io_module_get_type ())
#define G_IO_MODULE(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_IO_TYPE_MODULE, GIOModule))
#define G_IO_MODULE_CLASS(k) (G_TYPE_CHECK_CLASS_CAST((k), G_IO_TYPE_MODULE, GIOModuleClass))
#define G_IO_IS_MODULE(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_IO_TYPE_MODULE))
#define G_IO_IS_MODULE_CLASS(k) (G_TYPE_CHECK_CLASS_TYPE ((k), G_IO_TYPE_MODULE))
#define G_IO_MODULE_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS ((o), G_IO_TYPE_MODULE, GIOModuleClass))
/**
* GIOModule:
*
* Opaque module base class for extending GIO.
**/
typedef struct _GIOModuleClass GIOModuleClass;
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GType g_io_module_get_type (void) G_GNUC_CONST;
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GIOModule *g_io_module_new (const gchar *filename);
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void g_io_modules_scan_all_in_directory (const char *dirname);
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GList *g_io_modules_load_all_in_directory (const gchar *dirname);
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void g_io_modules_scan_all_in_directory_with_scope (const gchar *dirname,
GIOModuleScope *scope);
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GList *g_io_modules_load_all_in_directory_with_scope (const gchar *dirname,
GIOModuleScope *scope);
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GIOExtensionPoint *g_io_extension_point_register (const char *name);
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GIOExtensionPoint *g_io_extension_point_lookup (const char *name);
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void g_io_extension_point_set_required_type (GIOExtensionPoint *extension_point,
GType type);
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GType g_io_extension_point_get_required_type (GIOExtensionPoint *extension_point);
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GList *g_io_extension_point_get_extensions (GIOExtensionPoint *extension_point);
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GIOExtension * g_io_extension_point_get_extension_by_name (GIOExtensionPoint *extension_point,
const char *name);
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GIOExtension * g_io_extension_point_implement (const char *extension_point_name,
GType type,
const char *extension_name,
gint priority);
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GType g_io_extension_get_type (GIOExtension *extension);
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const char * g_io_extension_get_name (GIOExtension *extension);
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gint g_io_extension_get_priority (GIOExtension *extension);
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GTypeClass* g_io_extension_ref_class (GIOExtension *extension);
/* API for the modules to implement */
/**
* g_io_module_load:
* @module: a #GIOModule.
*
* Required API for GIO modules to implement.
*
* This function is run after the module has been loaded into GIO,
* to initialize the module. Typically, this function will call
* g_io_extension_point_implement().
**/
GLIB_AVAILABLE_IN_ALL
void g_io_module_load (GIOModule *module);
/**
* g_io_module_unload:
* @module: a #GIOModule.
*
* Required API for GIO modules to implement.
*
* This function is run when the module is being unloaded from GIO,
* to finalize the module.
**/
GLIB_AVAILABLE_IN_ALL
void g_io_module_unload (GIOModule *module);
/**
* g_io_module_query:
*
* Optional API for GIO modules to implement.
*
* Should return a list of all the extension points that may be
* implemented in this module.
*
* This method will not be called in normal use, however it may be
* called when probing existing modules and recording which extension
* points that this model is used for. This means we won't have to
* load and initialize this module unless its needed.
*
* If this function is not implemented by the module the module will
* always be loaded, initialized and then unloaded on application
* startup so that it can register its extension points during init.
*
* Note that a module need not actually implement all the extension
* points that g_io_module_query() returns, since the exact list of
* extension may depend on runtime issues. However all extension
* points actually implemented must be returned by g_io_module_query()
* (if defined).
*
* When installing a module that implements g_io_module_query() you must
* run gio-querymodules in order to build the cache files required for
* lazy loading.
*
* Returns: (transfer full): A %NULL-terminated array of strings,
* listing the supported extension points of the module. The array
* must be suitable for freeing with g_strfreev().
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*
* Since: 2.24
**/
GLIB_AVAILABLE_IN_ALL
char **g_io_module_query (void);
G_END_DECLS
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#endif /* __G_IO_MODULE_H__ */