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337912072a
It's the recommended way to build C/C++ projects on Windows, see https://learn.microsoft.com/en-us/windows/win32/intl/conventions-for-function-prototypes
1717 lines
49 KiB
C
1717 lines
49 KiB
C
/* GIO - GLib Input, Output and Streaming Library
|
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*
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* Copyright (C) 2006-2007 Red Hat, Inc.
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*
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* SPDX-License-Identifier: LGPL-2.1-or-later
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* 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/>.
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*
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* Author: Alexander Larsson <alexl@redhat.com>
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*/
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#include "config.h"
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/* For the #GDesktopAppInfoLookup macros; since macro deprecation is implemented
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* in the preprocessor, we need to define this before including glib.h*/
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#ifndef GLIB_DISABLE_DEPRECATION_WARNINGS
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#define GLIB_DISABLE_DEPRECATION_WARNINGS
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#endif
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#include <string.h>
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#include "giomodule.h"
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#include "giomodule-priv.h"
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#include "glib-private.h"
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#include "glocalfilemonitor.h"
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#include "gnativevolumemonitor.h"
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#include "gproxyresolver.h"
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#include "gproxy.h"
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#include "gsettingsbackendinternal.h"
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#include "ghttpproxy.h"
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#include "gsocks4proxy.h"
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#include "gsocks4aproxy.h"
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#include "gsocks5proxy.h"
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#include "gtlsbackend.h"
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#include "gvfs.h"
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#include "gnotificationbackend.h"
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#include "ginitable.h"
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#include "gnetworkmonitor.h"
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#include "gdebugcontroller.h"
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#include "gdebugcontrollerdbus.h"
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#include "gmemorymonitor.h"
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#include "gmemorymonitorportal.h"
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#include "gmemorymonitordbus.h"
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#include "gpowerprofilemonitor.h"
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#include "gpowerprofilemonitordbus.h"
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#include "gpowerprofilemonitorportal.h"
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#ifdef G_OS_WIN32
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#include "gregistrysettingsbackend.h"
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#include "giowin32-priv.h"
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#endif
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#include <glib/gstdio.h>
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#if defined(G_OS_UNIX) && !defined(__APPLE__)
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#include "gdesktopappinfo.h"
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#endif
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#ifdef HAVE_COCOA
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#include "gosxappinfo.h"
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#endif
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#ifdef __APPLE__
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#include <AvailabilityMacros.h>
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#endif
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#define __GLIB_H_INSIDE__
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#include "gconstructor.h"
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#undef __GLIB_H_INSIDE__
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/**
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* SECTION:giomodule
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* @short_description: Loadable GIO Modules
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* @include: gio/gio.h
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*
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* Provides an interface and default functions for loading and unloading
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* modules. This is used internally to make GIO extensible, but can also
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* be used by others to implement module loading.
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*
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**/
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/**
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* SECTION:extensionpoints
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* @short_description: Extension Points
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* @include: gio.h
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* @see_also: [Extending GIO][extending-gio]
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*
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* #GIOExtensionPoint provides a mechanism for modules to extend the
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* functionality of the library or application that loaded it in an
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* organized fashion.
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*
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* An extension point is identified by a name, and it may optionally
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* require that any implementation must be of a certain type (or derived
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* thereof). Use g_io_extension_point_register() to register an
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* extension point, and g_io_extension_point_set_required_type() to
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* set a required type.
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*
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* A module can implement an extension point by specifying the #GType
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* that implements the functionality. Additionally, each implementation
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* of an extension point has a name, and a priority. Use
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* g_io_extension_point_implement() to implement an extension point.
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*
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* |[<!-- language="C" -->
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* GIOExtensionPoint *ep;
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*
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* // Register an extension point
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* ep = g_io_extension_point_register ("my-extension-point");
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* g_io_extension_point_set_required_type (ep, MY_TYPE_EXAMPLE);
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* ]|
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*
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* |[<!-- language="C" -->
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* // Implement an extension point
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* G_DEFINE_TYPE (MyExampleImpl, my_example_impl, MY_TYPE_EXAMPLE)
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* g_io_extension_point_implement ("my-extension-point",
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* my_example_impl_get_type (),
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* "my-example",
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* 10);
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* ]|
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*
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* It is up to the code that registered the extension point how
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* it uses the implementations that have been associated with it.
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* Depending on the use case, it may use all implementations, or
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* only the one with the highest priority, or pick a specific
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* one by name.
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*
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* To avoid opening all modules just to find out what extension
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* points they implement, GIO makes use of a caching mechanism,
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* see [gio-querymodules][gio-querymodules].
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* You are expected to run this command after installing a
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* GIO module.
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*
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* The `GIO_EXTRA_MODULES` environment variable can be used to
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* specify additional directories to automatically load modules
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* from. This environment variable has the same syntax as the
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* `PATH`. If two modules have the same base name in different
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* directories, then the latter one will be ignored. If additional
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* directories are specified GIO will load modules from the built-in
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* directory last.
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*/
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/**
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* GIOModuleScope:
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*
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* Represents a scope for loading IO modules. A scope can be used for blocking
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* duplicate modules, or blocking a module you don't want to load.
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*
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* The scope can be used with g_io_modules_load_all_in_directory_with_scope()
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* or g_io_modules_scan_all_in_directory_with_scope().
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*
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* Since: 2.30
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*/
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struct _GIOModuleScope {
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GIOModuleScopeFlags flags;
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GHashTable *basenames;
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};
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/**
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* g_io_module_scope_new:
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* @flags: flags for the new scope
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*
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* Create a new scope for loading of IO modules. A scope can be used for
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* blocking duplicate modules, or blocking a module you don't want to load.
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*
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* Specify the %G_IO_MODULE_SCOPE_BLOCK_DUPLICATES flag to block modules
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* which have the same base name as a module that has already been seen
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* in this scope.
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*
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* Returns: (transfer full): the new module scope
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*
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* Since: 2.30
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*/
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GIOModuleScope *
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g_io_module_scope_new (GIOModuleScopeFlags flags)
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{
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GIOModuleScope *scope = g_new0 (GIOModuleScope, 1);
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scope->flags = flags;
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scope->basenames = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
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return scope;
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}
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/**
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* g_io_module_scope_free:
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* @scope: a module loading scope
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*
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* Free a module scope.
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*
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* Since: 2.30
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*/
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void
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g_io_module_scope_free (GIOModuleScope *scope)
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{
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if (!scope)
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return;
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g_hash_table_destroy (scope->basenames);
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g_free (scope);
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}
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/**
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* g_io_module_scope_block:
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* @scope: a module loading scope
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* @basename: the basename to block
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*
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* Block modules with the given @basename from being loaded when
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* this scope is used with g_io_modules_scan_all_in_directory_with_scope()
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* or g_io_modules_load_all_in_directory_with_scope().
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*
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* Since: 2.30
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*/
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void
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g_io_module_scope_block (GIOModuleScope *scope,
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const gchar *basename)
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{
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gchar *key;
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g_return_if_fail (scope != NULL);
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g_return_if_fail (basename != NULL);
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key = g_strdup (basename);
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g_hash_table_add (scope->basenames, key);
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}
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static gboolean
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_g_io_module_scope_contains (GIOModuleScope *scope,
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const gchar *basename)
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{
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return g_hash_table_contains (scope->basenames, basename);
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}
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struct _GIOModule {
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GTypeModule parent_instance;
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gchar *filename;
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GModule *library;
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gboolean initialized; /* The module was loaded at least once */
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void (* load) (GIOModule *module);
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void (* unload) (GIOModule *module);
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};
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struct _GIOModuleClass
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{
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GTypeModuleClass parent_class;
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};
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static void g_io_module_finalize (GObject *object);
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static gboolean g_io_module_load_module (GTypeModule *gmodule);
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static void g_io_module_unload_module (GTypeModule *gmodule);
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/**
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* GIOExtension:
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*
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* #GIOExtension is an opaque data structure and can only be accessed
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* using the following functions.
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*/
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struct _GIOExtension {
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char *name;
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GType type;
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gint priority;
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};
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/**
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* GIOExtensionPoint:
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*
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* #GIOExtensionPoint is an opaque data structure and can only be accessed
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* using the following functions.
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*/
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struct _GIOExtensionPoint {
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GType required_type;
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char *name;
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GList *extensions;
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GList *lazy_load_modules;
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};
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static GHashTable *extension_points = NULL;
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G_LOCK_DEFINE_STATIC(extension_points);
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G_DEFINE_TYPE (GIOModule, g_io_module, G_TYPE_TYPE_MODULE)
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static void
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g_io_module_class_init (GIOModuleClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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GTypeModuleClass *type_module_class = G_TYPE_MODULE_CLASS (class);
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object_class->finalize = g_io_module_finalize;
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type_module_class->load = g_io_module_load_module;
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type_module_class->unload = g_io_module_unload_module;
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}
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static void
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g_io_module_init (GIOModule *module)
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{
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}
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static void
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g_io_module_finalize (GObject *object)
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{
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GIOModule *module = G_IO_MODULE (object);
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g_free (module->filename);
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G_OBJECT_CLASS (g_io_module_parent_class)->finalize (object);
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}
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static gboolean
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load_symbols (GIOModule *module)
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{
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gchar *name;
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gchar *load_symname;
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gchar *unload_symname;
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gboolean ret;
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name = _g_io_module_extract_name (module->filename);
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load_symname = g_strconcat ("g_io_", name, "_load", NULL);
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unload_symname = g_strconcat ("g_io_", name, "_unload", NULL);
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ret = g_module_symbol (module->library,
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load_symname,
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(gpointer) &module->load) &&
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g_module_symbol (module->library,
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unload_symname,
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(gpointer) &module->unload);
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if (!ret)
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{
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/* Fallback to old names */
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ret = g_module_symbol (module->library,
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"g_io_module_load",
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(gpointer) &module->load) &&
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g_module_symbol (module->library,
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"g_io_module_unload",
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(gpointer) &module->unload);
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}
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g_free (name);
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g_free (load_symname);
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g_free (unload_symname);
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return ret;
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}
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static gboolean
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g_io_module_load_module (GTypeModule *gmodule)
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{
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GIOModule *module = G_IO_MODULE (gmodule);
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GError *error = NULL;
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if (!module->filename)
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{
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g_warning ("GIOModule path not set");
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return FALSE;
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}
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module->library = g_module_open_full (module->filename, G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL, &error);
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if (!module->library)
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{
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g_printerr ("%s\n", error->message);
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g_clear_error (&error);
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return FALSE;
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}
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/* Make sure that the loaded library contains the required methods */
|
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if (!load_symbols (module))
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{
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g_printerr ("%s\n", g_module_error ());
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g_module_close (module->library);
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return FALSE;
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}
|
||
|
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/* Initialize the loaded module */
|
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module->load (module);
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module->initialized = TRUE;
|
||
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return TRUE;
|
||
}
|
||
|
||
static void
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g_io_module_unload_module (GTypeModule *gmodule)
|
||
{
|
||
GIOModule *module = G_IO_MODULE (gmodule);
|
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module->unload (module);
|
||
|
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g_module_close (module->library);
|
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module->library = NULL;
|
||
|
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module->load = NULL;
|
||
module->unload = NULL;
|
||
}
|
||
|
||
/**
|
||
* g_io_module_new:
|
||
* @filename: (type filename): filename of the shared library module.
|
||
*
|
||
* Creates a new GIOModule that will load the specific
|
||
* shared library when in use.
|
||
*
|
||
* Returns: a #GIOModule from given @filename,
|
||
* or %NULL on error.
|
||
**/
|
||
GIOModule *
|
||
g_io_module_new (const gchar *filename)
|
||
{
|
||
GIOModule *module;
|
||
|
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g_return_val_if_fail (filename != NULL, NULL);
|
||
|
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module = g_object_new (G_IO_TYPE_MODULE, NULL);
|
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module->filename = g_strdup (filename);
|
||
|
||
return module;
|
||
}
|
||
|
||
static gboolean
|
||
is_valid_module_name (const gchar *basename,
|
||
GIOModuleScope *scope)
|
||
{
|
||
gboolean result;
|
||
|
||
#if !defined(G_OS_WIN32) && !defined(G_WITH_CYGWIN)
|
||
#if defined(__APPLE__)
|
||
if (!g_str_has_prefix (basename, "lib") ||
|
||
!(g_str_has_suffix (basename, ".so") ||
|
||
g_str_has_suffix (basename, ".dylib")))
|
||
return FALSE;
|
||
#else
|
||
if (!g_str_has_prefix (basename, "lib") ||
|
||
!g_str_has_suffix (basename, ".so"))
|
||
return FALSE;
|
||
#endif
|
||
#else
|
||
if (!g_str_has_suffix (basename, ".dll"))
|
||
return FALSE;
|
||
#endif
|
||
|
||
result = TRUE;
|
||
if (scope)
|
||
{
|
||
result = _g_io_module_scope_contains (scope, basename) ? FALSE : TRUE;
|
||
if (result && (scope->flags & G_IO_MODULE_SCOPE_BLOCK_DUPLICATES))
|
||
g_io_module_scope_block (scope, basename);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
|
||
/**
|
||
* g_io_modules_scan_all_in_directory_with_scope:
|
||
* @dirname: (type filename): pathname for a directory containing modules
|
||
* to scan.
|
||
* @scope: a scope to use when scanning the modules
|
||
*
|
||
* Scans all the modules in the specified directory, ensuring that
|
||
* any extension point implemented by a module is registered.
|
||
*
|
||
* This may not actually load and initialize all the types in each
|
||
* module, some modules may be lazily loaded and initialized when
|
||
* an extension point it implements is used with e.g.
|
||
* g_io_extension_point_get_extensions() or
|
||
* g_io_extension_point_get_extension_by_name().
|
||
*
|
||
* If you need to guarantee that all types are loaded in all the modules,
|
||
* use g_io_modules_load_all_in_directory().
|
||
*
|
||
* Since: 2.30
|
||
**/
|
||
void
|
||
g_io_modules_scan_all_in_directory_with_scope (const char *dirname,
|
||
GIOModuleScope *scope)
|
||
{
|
||
const gchar *name;
|
||
char *filename;
|
||
GDir *dir;
|
||
GStatBuf statbuf;
|
||
char *data;
|
||
time_t cache_time;
|
||
GHashTable *cache;
|
||
|
||
if (!g_module_supported ())
|
||
return;
|
||
|
||
dir = g_dir_open (dirname, 0, NULL);
|
||
if (!dir)
|
||
return;
|
||
|
||
filename = g_build_filename (dirname, "giomodule.cache", NULL);
|
||
|
||
cache = NULL;
|
||
cache_time = 0;
|
||
if (g_stat (filename, &statbuf) == 0 &&
|
||
g_file_get_contents (filename, &data, NULL, NULL))
|
||
{
|
||
char **lines;
|
||
int i;
|
||
|
||
/* cache_time is the time the cache file was created; we also take
|
||
* into account the change time because in ostree based systems, all
|
||
* system file have mtime equal to epoch 0.
|
||
*
|
||
* Any file that has a ctime before this was created then and not modified
|
||
* since then (userspace can't change ctime). Its possible to change the
|
||
* ctime forward without changing the file content, by e.g. chmoding the
|
||
* file, but this is uncommon and will only cause us to not use the cache
|
||
* so will not cause bugs.
|
||
*/
|
||
cache_time = MAX(statbuf.st_mtime, statbuf.st_ctime);
|
||
|
||
lines = g_strsplit (data, "\n", -1);
|
||
g_free (data);
|
||
|
||
for (i = 0; lines[i] != NULL; i++)
|
||
{
|
||
char *line = lines[i];
|
||
char *file;
|
||
char *colon;
|
||
char **strv_extension_points;
|
||
|
||
if (line[0] == '#')
|
||
continue;
|
||
|
||
colon = strchr (line, ':');
|
||
if (colon == NULL || line == colon)
|
||
continue; /* Invalid line, ignore */
|
||
|
||
*colon = 0; /* terminate filename */
|
||
file = g_strdup (line);
|
||
colon++; /* after colon */
|
||
|
||
while (g_ascii_isspace (*colon))
|
||
colon++;
|
||
|
||
if (G_UNLIKELY (!cache))
|
||
cache = g_hash_table_new_full (g_str_hash, g_str_equal,
|
||
g_free, (GDestroyNotify)g_strfreev);
|
||
|
||
strv_extension_points = g_strsplit (colon, ",", -1);
|
||
g_hash_table_insert (cache, file, strv_extension_points);
|
||
}
|
||
g_strfreev (lines);
|
||
}
|
||
|
||
while ((name = g_dir_read_name (dir)))
|
||
{
|
||
if (is_valid_module_name (name, scope))
|
||
{
|
||
GIOExtensionPoint *extension_point;
|
||
GIOModule *module;
|
||
gchar *path;
|
||
char **strv_extension_points = NULL;
|
||
int i;
|
||
|
||
path = g_build_filename (dirname, name, NULL);
|
||
module = g_io_module_new (path);
|
||
|
||
if (cache)
|
||
strv_extension_points = g_hash_table_lookup (cache, name);
|
||
|
||
if (strv_extension_points != NULL &&
|
||
g_stat (path, &statbuf) == 0 &&
|
||
statbuf.st_ctime <= cache_time)
|
||
{
|
||
/* Lazy load/init the library when first required */
|
||
for (i = 0; strv_extension_points[i] != NULL; i++)
|
||
{
|
||
extension_point =
|
||
g_io_extension_point_register (strv_extension_points[i]);
|
||
extension_point->lazy_load_modules =
|
||
g_list_prepend (extension_point->lazy_load_modules,
|
||
module);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Try to load and init types */
|
||
if (g_type_module_use (G_TYPE_MODULE (module)))
|
||
{
|
||
g_type_module_unuse (G_TYPE_MODULE (module)); /* Unload */
|
||
/* module must remain alive, because the type system keeps weak refs */
|
||
g_ignore_leak (module);
|
||
}
|
||
else
|
||
{
|
||
g_printerr ("Failed to load module: %s\n", path);
|
||
g_object_unref (module);
|
||
}
|
||
}
|
||
|
||
g_free (path);
|
||
}
|
||
}
|
||
|
||
g_dir_close (dir);
|
||
|
||
if (cache)
|
||
g_hash_table_destroy (cache);
|
||
|
||
g_free (filename);
|
||
}
|
||
|
||
/**
|
||
* g_io_modules_scan_all_in_directory:
|
||
* @dirname: (type filename): pathname for a directory containing modules
|
||
* to scan.
|
||
*
|
||
* Scans all the modules in the specified directory, ensuring that
|
||
* any extension point implemented by a module is registered.
|
||
*
|
||
* This may not actually load and initialize all the types in each
|
||
* module, some modules may be lazily loaded and initialized when
|
||
* an extension point it implements is used with e.g.
|
||
* g_io_extension_point_get_extensions() or
|
||
* g_io_extension_point_get_extension_by_name().
|
||
*
|
||
* If you need to guarantee that all types are loaded in all the modules,
|
||
* use g_io_modules_load_all_in_directory().
|
||
*
|
||
* Since: 2.24
|
||
**/
|
||
void
|
||
g_io_modules_scan_all_in_directory (const char *dirname)
|
||
{
|
||
g_io_modules_scan_all_in_directory_with_scope (dirname, NULL);
|
||
}
|
||
|
||
/**
|
||
* g_io_modules_load_all_in_directory_with_scope:
|
||
* @dirname: (type filename): pathname for a directory containing modules
|
||
* to load.
|
||
* @scope: a scope to use when scanning the modules.
|
||
*
|
||
* Loads all the modules in the specified directory.
|
||
*
|
||
* If don't require all modules to be initialized (and thus registering
|
||
* all gtypes) then you can use g_io_modules_scan_all_in_directory()
|
||
* which allows delayed/lazy loading of modules.
|
||
*
|
||
* Returns: (element-type GIOModule) (transfer full): a list of #GIOModules loaded
|
||
* from the directory,
|
||
* All the modules are loaded into memory, if you want to
|
||
* unload them (enabling on-demand loading) you must call
|
||
* g_type_module_unuse() on all the modules. Free the list
|
||
* with g_list_free().
|
||
*
|
||
* Since: 2.30
|
||
**/
|
||
GList *
|
||
g_io_modules_load_all_in_directory_with_scope (const char *dirname,
|
||
GIOModuleScope *scope)
|
||
{
|
||
const gchar *name;
|
||
GDir *dir;
|
||
GList *modules;
|
||
|
||
if (!g_module_supported ())
|
||
return NULL;
|
||
|
||
dir = g_dir_open (dirname, 0, NULL);
|
||
if (!dir)
|
||
return NULL;
|
||
|
||
modules = NULL;
|
||
while ((name = g_dir_read_name (dir)))
|
||
{
|
||
if (is_valid_module_name (name, scope))
|
||
{
|
||
GIOModule *module;
|
||
gchar *path;
|
||
|
||
path = g_build_filename (dirname, name, NULL);
|
||
module = g_io_module_new (path);
|
||
|
||
if (!g_type_module_use (G_TYPE_MODULE (module)))
|
||
{
|
||
g_printerr ("Failed to load module: %s\n", path);
|
||
g_object_unref (module);
|
||
g_free (path);
|
||
continue;
|
||
}
|
||
|
||
g_free (path);
|
||
|
||
modules = g_list_prepend (modules, module);
|
||
}
|
||
}
|
||
|
||
g_dir_close (dir);
|
||
|
||
return modules;
|
||
}
|
||
|
||
/**
|
||
* g_io_modules_load_all_in_directory:
|
||
* @dirname: (type filename): pathname for a directory containing modules
|
||
* to load.
|
||
*
|
||
* Loads all the modules in the specified directory.
|
||
*
|
||
* If don't require all modules to be initialized (and thus registering
|
||
* all gtypes) then you can use g_io_modules_scan_all_in_directory()
|
||
* which allows delayed/lazy loading of modules.
|
||
*
|
||
* Returns: (element-type GIOModule) (transfer full): a list of #GIOModules loaded
|
||
* from the directory,
|
||
* All the modules are loaded into memory, if you want to
|
||
* unload them (enabling on-demand loading) you must call
|
||
* g_type_module_unuse() on all the modules. Free the list
|
||
* with g_list_free().
|
||
**/
|
||
GList *
|
||
g_io_modules_load_all_in_directory (const char *dirname)
|
||
{
|
||
return g_io_modules_load_all_in_directory_with_scope (dirname, NULL);
|
||
}
|
||
|
||
static gpointer
|
||
try_class (GIOExtension *extension,
|
||
guint is_supported_offset)
|
||
{
|
||
GType type = g_io_extension_get_type (extension);
|
||
typedef gboolean (*verify_func) (void);
|
||
gpointer class;
|
||
|
||
class = g_type_class_ref (type);
|
||
if (!is_supported_offset || (* G_STRUCT_MEMBER(verify_func, class, is_supported_offset)) ())
|
||
return class;
|
||
|
||
g_type_class_unref (class);
|
||
return NULL;
|
||
}
|
||
|
||
static void
|
||
print_help (const char *envvar,
|
||
GIOExtensionPoint *ep)
|
||
{
|
||
g_print ("Supported arguments for %s environment variable:\n", envvar);
|
||
|
||
if (g_io_extension_point_get_extensions (ep) == NULL)
|
||
g_print (" (none)\n");
|
||
else
|
||
{
|
||
GList *l;
|
||
GIOExtension *extension;
|
||
gsize width = 0;
|
||
|
||
for (l = g_io_extension_point_get_extensions (ep); l; l = l->next)
|
||
{
|
||
extension = l->data;
|
||
width = MAX (width, strlen (g_io_extension_get_name (extension)));
|
||
}
|
||
|
||
for (l = g_io_extension_point_get_extensions (ep); l; l = l->next)
|
||
{
|
||
extension = l->data;
|
||
|
||
g_print (" %*s - %d\n", (int) MIN (width, G_MAXINT),
|
||
g_io_extension_get_name (extension),
|
||
g_io_extension_get_priority (extension));
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* _g_io_module_get_default_type:
|
||
* @extension_point: the name of an extension point
|
||
* @envvar: (nullable): the name of an environment variable to
|
||
* override the default implementation.
|
||
* @is_supported_offset: a vtable offset, or zero
|
||
*
|
||
* Retrieves the default class implementing @extension_point.
|
||
*
|
||
* If @envvar is not %NULL, and the environment variable with that
|
||
* name is set, then the implementation it specifies will be tried
|
||
* first. After that, or if @envvar is not set, all other
|
||
* implementations will be tried in order of decreasing priority.
|
||
*
|
||
* If @is_supported_offset is non-zero, then it is the offset into the
|
||
* class vtable at which there is a function that takes no arguments and
|
||
* returns a boolean. This function will be called on each candidate
|
||
* implementation to check if it is actually usable or not.
|
||
*
|
||
* The result is cached after it is generated the first time, and
|
||
* the function is thread-safe.
|
||
*
|
||
* Returns: (transfer none): the type to instantiate to implement
|
||
* @extension_point, or %G_TYPE_INVALID if there are no usable
|
||
* implementations.
|
||
*/
|
||
GType
|
||
_g_io_module_get_default_type (const gchar *extension_point,
|
||
const gchar *envvar,
|
||
guint is_supported_offset)
|
||
{
|
||
static GRecMutex default_modules_lock;
|
||
static GHashTable *default_modules;
|
||
const char *use_this;
|
||
GList *l;
|
||
GIOExtensionPoint *ep;
|
||
GIOExtension *extension, *preferred;
|
||
gpointer impl;
|
||
|
||
g_rec_mutex_lock (&default_modules_lock);
|
||
if (default_modules)
|
||
{
|
||
gpointer key;
|
||
|
||
if (g_hash_table_lookup_extended (default_modules, extension_point, &key, &impl))
|
||
{
|
||
g_rec_mutex_unlock (&default_modules_lock);
|
||
return impl ? G_OBJECT_CLASS_TYPE (impl) : G_TYPE_INVALID;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
default_modules = g_hash_table_new (g_str_hash, g_str_equal);
|
||
}
|
||
|
||
_g_io_modules_ensure_loaded ();
|
||
ep = g_io_extension_point_lookup (extension_point);
|
||
|
||
if (!ep)
|
||
{
|
||
g_warn_if_reached ();
|
||
g_rec_mutex_unlock (&default_modules_lock);
|
||
return G_TYPE_INVALID;
|
||
}
|
||
|
||
/* It’s OK to query the environment here, even when running as setuid, because
|
||
* it only allows a choice between existing already-loaded modules. No new
|
||
* code is loaded based on the environment variable value. */
|
||
use_this = envvar ? g_getenv (envvar) : NULL;
|
||
if (g_strcmp0 (use_this, "help") == 0)
|
||
{
|
||
print_help (envvar, ep);
|
||
use_this = NULL;
|
||
}
|
||
|
||
if (use_this)
|
||
{
|
||
preferred = g_io_extension_point_get_extension_by_name (ep, use_this);
|
||
if (preferred)
|
||
{
|
||
impl = try_class (preferred, is_supported_offset);
|
||
if (impl)
|
||
goto done;
|
||
}
|
||
else
|
||
g_warning ("Can't find module '%s' specified in %s", use_this, envvar);
|
||
}
|
||
else
|
||
preferred = NULL;
|
||
|
||
for (l = g_io_extension_point_get_extensions (ep); l != NULL; l = l->next)
|
||
{
|
||
extension = l->data;
|
||
if (extension == preferred)
|
||
continue;
|
||
|
||
impl = try_class (extension, is_supported_offset);
|
||
if (impl)
|
||
goto done;
|
||
}
|
||
|
||
impl = NULL;
|
||
|
||
done:
|
||
g_hash_table_insert (default_modules, g_strdup (extension_point), impl);
|
||
g_rec_mutex_unlock (&default_modules_lock);
|
||
|
||
return impl ? G_OBJECT_CLASS_TYPE (impl) : G_TYPE_INVALID;
|
||
}
|
||
|
||
static gpointer
|
||
try_implementation (const char *extension_point,
|
||
GIOExtension *extension,
|
||
GIOModuleVerifyFunc verify_func)
|
||
{
|
||
GType type = g_io_extension_get_type (extension);
|
||
gpointer impl;
|
||
|
||
if (g_type_is_a (type, G_TYPE_INITABLE))
|
||
{
|
||
GError *error = NULL;
|
||
|
||
impl = g_initable_new (type, NULL, &error, NULL);
|
||
if (impl)
|
||
return impl;
|
||
|
||
g_debug ("Failed to initialize %s (%s) for %s: %s",
|
||
g_io_extension_get_name (extension),
|
||
g_type_name (type),
|
||
extension_point,
|
||
error ? error->message : "");
|
||
g_clear_error (&error);
|
||
return NULL;
|
||
}
|
||
else
|
||
{
|
||
impl = g_object_new (type, NULL);
|
||
if (!verify_func || verify_func (impl))
|
||
return impl;
|
||
|
||
g_object_unref (impl);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
static void
|
||
weak_ref_free (GWeakRef *weak_ref)
|
||
{
|
||
g_weak_ref_clear (weak_ref);
|
||
g_free (weak_ref);
|
||
}
|
||
|
||
/**
|
||
* _g_io_module_get_default:
|
||
* @extension_point: the name of an extension point
|
||
* @envvar: (nullable): the name of an environment variable to
|
||
* override the default implementation.
|
||
* @verify_func: (nullable): a function to call to verify that
|
||
* a given implementation is usable in the current environment.
|
||
*
|
||
* Retrieves the default object implementing @extension_point.
|
||
*
|
||
* If @envvar is not %NULL, and the environment variable with that
|
||
* name is set, then the implementation it specifies will be tried
|
||
* first. After that, or if @envvar is not set, all other
|
||
* implementations will be tried in order of decreasing priority.
|
||
*
|
||
* If an extension point implementation implements #GInitable, then
|
||
* that implementation will only be used if it initializes
|
||
* successfully. Otherwise, if @verify_func is not %NULL, then it will
|
||
* be called on each candidate implementation after construction, to
|
||
* check if it is actually usable or not.
|
||
*
|
||
* The result is cached after it is generated the first time (but the cache does
|
||
* not keep a strong reference to the object), and
|
||
* the function is thread-safe.
|
||
*
|
||
* Returns: (transfer full) (nullable): an object implementing
|
||
* @extension_point, or %NULL if there are no usable
|
||
* implementations.
|
||
*/
|
||
gpointer
|
||
_g_io_module_get_default (const gchar *extension_point,
|
||
const gchar *envvar,
|
||
GIOModuleVerifyFunc verify_func)
|
||
{
|
||
static GRecMutex default_modules_lock;
|
||
static GHashTable *default_modules;
|
||
const char *use_this;
|
||
GList *l;
|
||
GIOExtensionPoint *ep;
|
||
GIOExtension *extension = NULL, *preferred;
|
||
gpointer impl, value;
|
||
GWeakRef *impl_weak_ref = NULL;
|
||
|
||
g_rec_mutex_lock (&default_modules_lock);
|
||
if (default_modules)
|
||
{
|
||
if (g_hash_table_lookup_extended (default_modules, extension_point,
|
||
NULL, &value))
|
||
{
|
||
/* Don’t debug here, since we’re returning a cached object which was
|
||
* already printed earlier. */
|
||
impl_weak_ref = value;
|
||
impl = g_weak_ref_get (impl_weak_ref);
|
||
|
||
/* If the object has been finalised (impl == NULL), fall through and
|
||
* instantiate a new one. */
|
||
if (impl != NULL)
|
||
{
|
||
g_rec_mutex_unlock (&default_modules_lock);
|
||
return g_steal_pointer (&impl);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
default_modules = g_hash_table_new_full (g_str_hash, g_str_equal,
|
||
g_free, (GDestroyNotify) weak_ref_free);
|
||
}
|
||
|
||
_g_io_modules_ensure_loaded ();
|
||
ep = g_io_extension_point_lookup (extension_point);
|
||
|
||
if (!ep)
|
||
{
|
||
g_debug ("%s: Failed to find extension point ‘%s’",
|
||
G_STRFUNC, extension_point);
|
||
g_warn_if_reached ();
|
||
g_rec_mutex_unlock (&default_modules_lock);
|
||
return NULL;
|
||
}
|
||
|
||
/* It’s OK to query the environment here, even when running as setuid, because
|
||
* it only allows a choice between existing already-loaded modules. No new
|
||
* code is loaded based on the environment variable value. */
|
||
use_this = envvar ? g_getenv (envvar) : NULL;
|
||
if (g_strcmp0 (use_this, "help") == 0)
|
||
{
|
||
print_help (envvar, ep);
|
||
use_this = NULL;
|
||
}
|
||
|
||
if (use_this)
|
||
{
|
||
preferred = g_io_extension_point_get_extension_by_name (ep, use_this);
|
||
if (preferred)
|
||
{
|
||
impl = try_implementation (extension_point, preferred, verify_func);
|
||
extension = preferred;
|
||
if (impl)
|
||
goto done;
|
||
}
|
||
else
|
||
g_warning ("Can't find module '%s' specified in %s", use_this, envvar);
|
||
}
|
||
else
|
||
preferred = NULL;
|
||
|
||
for (l = g_io_extension_point_get_extensions (ep); l != NULL; l = l->next)
|
||
{
|
||
extension = l->data;
|
||
if (extension == preferred)
|
||
continue;
|
||
|
||
impl = try_implementation (extension_point, extension, verify_func);
|
||
if (impl)
|
||
goto done;
|
||
}
|
||
|
||
impl = NULL;
|
||
|
||
done:
|
||
if (impl_weak_ref == NULL)
|
||
{
|
||
impl_weak_ref = g_new0 (GWeakRef, 1);
|
||
g_weak_ref_init (impl_weak_ref, impl);
|
||
g_hash_table_insert (default_modules, g_strdup (extension_point),
|
||
g_steal_pointer (&impl_weak_ref));
|
||
}
|
||
else
|
||
{
|
||
g_weak_ref_set (impl_weak_ref, impl);
|
||
}
|
||
|
||
g_rec_mutex_unlock (&default_modules_lock);
|
||
|
||
if (impl != NULL)
|
||
{
|
||
g_assert (extension != NULL);
|
||
g_debug ("%s: Found default implementation %s (%s) for ‘%s’",
|
||
G_STRFUNC, g_io_extension_get_name (extension),
|
||
G_OBJECT_TYPE_NAME (impl), extension_point);
|
||
}
|
||
else
|
||
g_debug ("%s: Failed to find default implementation for ‘%s’",
|
||
G_STRFUNC, extension_point);
|
||
|
||
return g_steal_pointer (&impl);
|
||
}
|
||
|
||
extern GType g_inotify_file_monitor_get_type (void);
|
||
extern GType g_kqueue_file_monitor_get_type (void);
|
||
extern GType g_win32_file_monitor_get_type (void);
|
||
|
||
extern GType _g_unix_volume_monitor_get_type (void);
|
||
extern GType _g_local_vfs_get_type (void);
|
||
|
||
extern GType _g_win32_volume_monitor_get_type (void);
|
||
extern GType _g_winhttp_vfs_get_type (void);
|
||
|
||
extern GType _g_dummy_proxy_resolver_get_type (void);
|
||
extern GType _g_dummy_tls_backend_get_type (void);
|
||
extern GType g_network_monitor_base_get_type (void);
|
||
#ifdef HAVE_NETLINK
|
||
extern GType _g_network_monitor_netlink_get_type (void);
|
||
extern GType _g_network_monitor_nm_get_type (void);
|
||
#endif
|
||
|
||
extern GType g_debug_controller_dbus_get_type (void);
|
||
extern GType g_memory_monitor_dbus_get_type (void);
|
||
extern GType g_memory_monitor_portal_get_type (void);
|
||
extern GType g_memory_monitor_win32_get_type (void);
|
||
extern GType g_power_profile_monitor_dbus_get_type (void);
|
||
|
||
#ifdef G_OS_UNIX
|
||
extern GType g_fdo_notification_backend_get_type (void);
|
||
extern GType g_gtk_notification_backend_get_type (void);
|
||
extern GType g_portal_notification_backend_get_type (void);
|
||
extern GType g_proxy_resolver_portal_get_type (void);
|
||
extern GType g_network_monitor_portal_get_type (void);
|
||
#endif
|
||
|
||
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
|
||
extern GType g_cocoa_notification_backend_get_type (void);
|
||
#endif
|
||
|
||
#ifdef G_PLATFORM_WIN32
|
||
extern GType g_win32_notification_backend_get_type (void);
|
||
|
||
#include <windows.h>
|
||
extern GType _g_win32_network_monitor_get_type (void);
|
||
|
||
static HMODULE gio_dll = NULL;
|
||
|
||
#ifndef GLIB_STATIC_COMPILATION
|
||
|
||
BOOL WINAPI DllMain (HINSTANCE hinstDLL,
|
||
DWORD fdwReason,
|
||
LPVOID lpvReserved);
|
||
|
||
BOOL WINAPI
|
||
DllMain (HINSTANCE hinstDLL,
|
||
DWORD fdwReason,
|
||
LPVOID lpvReserved)
|
||
{
|
||
if (fdwReason == DLL_PROCESS_ATTACH)
|
||
{
|
||
gio_dll = hinstDLL;
|
||
gio_win32_appinfo_init (FALSE);
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
#elif defined(G_HAS_CONSTRUCTORS) /* && G_PLATFORM_WIN32 && GLIB_STATIC_COMPILATION */
|
||
extern void glib_win32_init (void);
|
||
extern void gobject_win32_init (void);
|
||
|
||
#ifdef G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA
|
||
#pragma G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS(giomodule_init_ctor)
|
||
#endif
|
||
|
||
G_DEFINE_CONSTRUCTOR (giomodule_init_ctor)
|
||
|
||
static void
|
||
giomodule_init_ctor (void)
|
||
{
|
||
/* When built dynamically, module initialization is done through DllMain
|
||
* function which is called when the dynamic library is loaded by the glib
|
||
* module AFTER loading gobject. So, in dynamic configuration glib and
|
||
* gobject are always initialized BEFORE gio.
|
||
*
|
||
* When built statically, initialization mechanism relies on hooking
|
||
* functions to the CRT section directly at compilation time. As we don't
|
||
* control how each compilation unit will be built and in which order, we
|
||
* obtain the same kind of issue as the "static initialization order fiasco".
|
||
* In this case, we must ensure explicitly that glib and gobject are always
|
||
* well initialized BEFORE gio.
|
||
*/
|
||
glib_win32_init ();
|
||
gobject_win32_init ();
|
||
gio_win32_appinfo_init (FALSE);
|
||
}
|
||
|
||
#else /* G_PLATFORM_WIN32 && GLIB_STATIC_COMPILATION && !G_HAS_CONSTRUCTORS */
|
||
#error Your platform/compiler is missing constructor support
|
||
#endif /* GLIB_STATIC_COMPILATION */
|
||
|
||
void *
|
||
_g_io_win32_get_module (void)
|
||
{
|
||
if (!gio_dll)
|
||
GetModuleHandleEx (GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS |
|
||
GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT,
|
||
(LPCWSTR) _g_io_win32_get_module,
|
||
&gio_dll);
|
||
return gio_dll;
|
||
}
|
||
|
||
#endif /* G_PLATFORM_WIN32 */
|
||
|
||
void
|
||
_g_io_modules_ensure_extension_points_registered (void)
|
||
{
|
||
static gsize registered_extensions = FALSE;
|
||
GIOExtensionPoint *ep;
|
||
|
||
if (g_once_init_enter (®istered_extensions))
|
||
{
|
||
#if defined(G_OS_UNIX) && !defined(__APPLE__)
|
||
#if !GLIB_CHECK_VERSION (3, 0, 0)
|
||
ep = g_io_extension_point_register (G_DESKTOP_APP_INFO_LOOKUP_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_DESKTOP_APP_INFO_LOOKUP);
|
||
#endif
|
||
#endif
|
||
|
||
ep = g_io_extension_point_register (G_LOCAL_FILE_MONITOR_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_LOCAL_FILE_MONITOR);
|
||
|
||
ep = g_io_extension_point_register (G_NFS_FILE_MONITOR_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_LOCAL_FILE_MONITOR);
|
||
|
||
ep = g_io_extension_point_register (G_VOLUME_MONITOR_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_VOLUME_MONITOR);
|
||
|
||
ep = g_io_extension_point_register (G_NATIVE_VOLUME_MONITOR_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_NATIVE_VOLUME_MONITOR);
|
||
|
||
ep = g_io_extension_point_register (G_VFS_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_VFS);
|
||
|
||
ep = g_io_extension_point_register ("gsettings-backend");
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_OBJECT);
|
||
|
||
ep = g_io_extension_point_register (G_PROXY_RESOLVER_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_PROXY_RESOLVER);
|
||
|
||
ep = g_io_extension_point_register (G_PROXY_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_PROXY);
|
||
|
||
ep = g_io_extension_point_register (G_TLS_BACKEND_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_TLS_BACKEND);
|
||
|
||
ep = g_io_extension_point_register (G_NETWORK_MONITOR_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_NETWORK_MONITOR);
|
||
|
||
ep = g_io_extension_point_register (G_NOTIFICATION_BACKEND_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_NOTIFICATION_BACKEND);
|
||
|
||
ep = g_io_extension_point_register (G_DEBUG_CONTROLLER_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_DEBUG_CONTROLLER);
|
||
|
||
ep = g_io_extension_point_register (G_MEMORY_MONITOR_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_MEMORY_MONITOR);
|
||
|
||
ep = g_io_extension_point_register (G_POWER_PROFILE_MONITOR_EXTENSION_POINT_NAME);
|
||
g_io_extension_point_set_required_type (ep, G_TYPE_POWER_PROFILE_MONITOR);
|
||
|
||
g_once_init_leave (®istered_extensions, TRUE);
|
||
}
|
||
}
|
||
|
||
static gchar *
|
||
get_gio_module_dir (void)
|
||
{
|
||
gchar *module_dir;
|
||
gboolean is_setuid = GLIB_PRIVATE_CALL (g_check_setuid) ();
|
||
|
||
/* If running as setuid, loading modules from an arbitrary directory
|
||
* controlled by the unprivileged user who is running the program could allow
|
||
* for execution of arbitrary code (in constructors in modules).
|
||
* Don’t allow it.
|
||
*
|
||
* If a setuid program somehow needs to load additional GIO modules, it should
|
||
* explicitly call g_io_modules_scan_all_in_directory(). */
|
||
module_dir = !is_setuid ? g_strdup (g_getenv ("GIO_MODULE_DIR")) : NULL;
|
||
if (module_dir == NULL)
|
||
{
|
||
#ifdef G_OS_WIN32
|
||
gchar *install_dir;
|
||
|
||
install_dir = g_win32_get_package_installation_directory_of_module (gio_dll);
|
||
module_dir = g_build_filename (install_dir,
|
||
"lib", "gio", "modules",
|
||
NULL);
|
||
g_free (install_dir);
|
||
#else
|
||
module_dir = g_strdup (GIO_MODULE_DIR);
|
||
#ifdef __APPLE__
|
||
#include "TargetConditionals.h"
|
||
/* Only auto-relocate on macOS, not watchOS etc; older macOS SDKs only define TARGET_OS_MAC */
|
||
#if (defined (TARGET_OS_OSX) && TARGET_OS_OSX) || \
|
||
(!defined (TARGET_OS_OSX) && defined (TARGET_OS_MAC) && TARGET_OS_MAC)
|
||
#include <dlfcn.h>
|
||
{
|
||
g_autofree gchar *path = NULL;
|
||
g_autofree gchar *possible_dir = NULL;
|
||
Dl_info info;
|
||
|
||
if (dladdr (get_gio_module_dir, &info))
|
||
{
|
||
/* Gets path to the PREFIX/lib directory */
|
||
path = g_path_get_dirname (info.dli_fname);
|
||
possible_dir = g_build_filename (path, "gio", "modules", NULL);
|
||
if (g_file_test (possible_dir, G_FILE_TEST_IS_DIR))
|
||
{
|
||
g_free (module_dir);
|
||
module_dir = g_steal_pointer (&possible_dir);
|
||
}
|
||
}
|
||
}
|
||
#endif
|
||
#endif
|
||
#endif
|
||
}
|
||
|
||
return module_dir;
|
||
}
|
||
|
||
void
|
||
_g_io_modules_ensure_loaded (void)
|
||
{
|
||
static gsize loaded_dirs = FALSE;
|
||
const char *module_path;
|
||
GIOModuleScope *scope;
|
||
|
||
_g_io_modules_ensure_extension_points_registered ();
|
||
|
||
if (g_once_init_enter (&loaded_dirs))
|
||
{
|
||
gboolean is_setuid = GLIB_PRIVATE_CALL (g_check_setuid) ();
|
||
gchar *module_dir;
|
||
|
||
scope = g_io_module_scope_new (G_IO_MODULE_SCOPE_BLOCK_DUPLICATES);
|
||
|
||
/* First load any overrides, extras (but not if running as setuid!) */
|
||
module_path = !is_setuid ? g_getenv ("GIO_EXTRA_MODULES") : NULL;
|
||
if (module_path)
|
||
{
|
||
gchar **paths;
|
||
int i;
|
||
|
||
paths = g_strsplit (module_path, G_SEARCHPATH_SEPARATOR_S, 0);
|
||
|
||
for (i = 0; paths[i] != NULL; i++)
|
||
{
|
||
g_io_modules_scan_all_in_directory_with_scope (paths[i], scope);
|
||
}
|
||
|
||
g_strfreev (paths);
|
||
}
|
||
|
||
/* Then load the compiled in path */
|
||
module_dir = get_gio_module_dir ();
|
||
|
||
g_io_modules_scan_all_in_directory_with_scope (module_dir, scope);
|
||
g_free (module_dir);
|
||
|
||
g_io_module_scope_free (scope);
|
||
|
||
/* Initialize types from built-in "modules" */
|
||
g_type_ensure (g_null_settings_backend_get_type ());
|
||
g_type_ensure (g_memory_settings_backend_get_type ());
|
||
g_type_ensure (g_keyfile_settings_backend_get_type ());
|
||
g_type_ensure (g_power_profile_monitor_dbus_get_type ());
|
||
#if defined(HAVE_INOTIFY_INIT1)
|
||
g_type_ensure (g_inotify_file_monitor_get_type ());
|
||
#endif
|
||
#if defined(HAVE_KQUEUE)
|
||
g_type_ensure (g_kqueue_file_monitor_get_type ());
|
||
#endif
|
||
#ifdef G_OS_WIN32
|
||
g_type_ensure (_g_win32_volume_monitor_get_type ());
|
||
g_type_ensure (g_win32_file_monitor_get_type ());
|
||
g_type_ensure (g_registry_settings_backend_get_type ());
|
||
#endif
|
||
#ifdef HAVE_COCOA
|
||
g_type_ensure (g_nextstep_settings_backend_get_type ());
|
||
g_type_ensure (g_osx_app_info_get_type ());
|
||
#endif
|
||
#ifdef G_OS_UNIX
|
||
g_type_ensure (_g_unix_volume_monitor_get_type ());
|
||
g_type_ensure (g_debug_controller_dbus_get_type ());
|
||
g_type_ensure (g_fdo_notification_backend_get_type ());
|
||
g_type_ensure (g_gtk_notification_backend_get_type ());
|
||
g_type_ensure (g_portal_notification_backend_get_type ());
|
||
g_type_ensure (g_memory_monitor_dbus_get_type ());
|
||
g_type_ensure (g_memory_monitor_portal_get_type ());
|
||
g_type_ensure (g_network_monitor_portal_get_type ());
|
||
g_type_ensure (g_power_profile_monitor_portal_get_type ());
|
||
g_type_ensure (g_proxy_resolver_portal_get_type ());
|
||
#endif
|
||
#if MAC_OS_X_VERSION_MIN_REQUIRED >= 1090
|
||
g_type_ensure (g_cocoa_notification_backend_get_type ());
|
||
#endif
|
||
#ifdef G_OS_WIN32
|
||
g_type_ensure (g_win32_notification_backend_get_type ());
|
||
g_type_ensure (_g_winhttp_vfs_get_type ());
|
||
g_type_ensure (g_memory_monitor_win32_get_type ());
|
||
#endif
|
||
g_type_ensure (_g_local_vfs_get_type ());
|
||
g_type_ensure (_g_dummy_proxy_resolver_get_type ());
|
||
g_type_ensure (_g_http_proxy_get_type ());
|
||
g_type_ensure (_g_https_proxy_get_type ());
|
||
g_type_ensure (_g_socks4a_proxy_get_type ());
|
||
g_type_ensure (_g_socks4_proxy_get_type ());
|
||
g_type_ensure (_g_socks5_proxy_get_type ());
|
||
g_type_ensure (_g_dummy_tls_backend_get_type ());
|
||
g_type_ensure (g_network_monitor_base_get_type ());
|
||
#ifdef HAVE_NETLINK
|
||
g_type_ensure (_g_network_monitor_netlink_get_type ());
|
||
g_type_ensure (_g_network_monitor_nm_get_type ());
|
||
#endif
|
||
#ifdef G_OS_WIN32
|
||
g_type_ensure (_g_win32_network_monitor_get_type ());
|
||
#endif
|
||
|
||
g_once_init_leave (&loaded_dirs, TRUE);
|
||
}
|
||
}
|
||
|
||
static void
|
||
g_io_extension_point_free (GIOExtensionPoint *ep)
|
||
{
|
||
g_free (ep->name);
|
||
g_free (ep);
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_point_register:
|
||
* @name: The name of the extension point
|
||
*
|
||
* Registers an extension point.
|
||
*
|
||
* Returns: (transfer none): the new #GIOExtensionPoint. This object is
|
||
* owned by GIO and should not be freed.
|
||
*/
|
||
GIOExtensionPoint *
|
||
g_io_extension_point_register (const char *name)
|
||
{
|
||
GIOExtensionPoint *ep;
|
||
|
||
G_LOCK (extension_points);
|
||
if (extension_points == NULL)
|
||
extension_points = g_hash_table_new_full (g_str_hash,
|
||
g_str_equal,
|
||
NULL,
|
||
(GDestroyNotify)g_io_extension_point_free);
|
||
|
||
ep = g_hash_table_lookup (extension_points, name);
|
||
if (ep != NULL)
|
||
{
|
||
G_UNLOCK (extension_points);
|
||
return ep;
|
||
}
|
||
|
||
ep = g_new0 (GIOExtensionPoint, 1);
|
||
ep->name = g_strdup (name);
|
||
|
||
g_hash_table_insert (extension_points, ep->name, ep);
|
||
|
||
G_UNLOCK (extension_points);
|
||
|
||
return ep;
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_point_lookup:
|
||
* @name: the name of the extension point
|
||
*
|
||
* Looks up an existing extension point.
|
||
*
|
||
* Returns: (transfer none): the #GIOExtensionPoint, or %NULL if there
|
||
* is no registered extension point with the given name.
|
||
*/
|
||
GIOExtensionPoint *
|
||
g_io_extension_point_lookup (const char *name)
|
||
{
|
||
GIOExtensionPoint *ep;
|
||
|
||
G_LOCK (extension_points);
|
||
ep = NULL;
|
||
if (extension_points != NULL)
|
||
ep = g_hash_table_lookup (extension_points, name);
|
||
|
||
G_UNLOCK (extension_points);
|
||
|
||
return ep;
|
||
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_point_set_required_type:
|
||
* @extension_point: a #GIOExtensionPoint
|
||
* @type: the #GType to require
|
||
*
|
||
* Sets the required type for @extension_point to @type.
|
||
* All implementations must henceforth have this type.
|
||
*/
|
||
void
|
||
g_io_extension_point_set_required_type (GIOExtensionPoint *extension_point,
|
||
GType type)
|
||
{
|
||
extension_point->required_type = type;
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_point_get_required_type:
|
||
* @extension_point: a #GIOExtensionPoint
|
||
*
|
||
* Gets the required type for @extension_point.
|
||
*
|
||
* Returns: the #GType that all implementations must have,
|
||
* or %G_TYPE_INVALID if the extension point has no required type
|
||
*/
|
||
GType
|
||
g_io_extension_point_get_required_type (GIOExtensionPoint *extension_point)
|
||
{
|
||
return extension_point->required_type;
|
||
}
|
||
|
||
static void
|
||
lazy_load_modules (GIOExtensionPoint *extension_point)
|
||
{
|
||
GIOModule *module;
|
||
GList *l;
|
||
|
||
for (l = extension_point->lazy_load_modules; l != NULL; l = l->next)
|
||
{
|
||
module = l->data;
|
||
|
||
if (!module->initialized)
|
||
{
|
||
if (g_type_module_use (G_TYPE_MODULE (module)))
|
||
g_type_module_unuse (G_TYPE_MODULE (module)); /* Unload */
|
||
else
|
||
g_printerr ("Failed to load module: %s\n",
|
||
module->filename);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_point_get_extensions:
|
||
* @extension_point: a #GIOExtensionPoint
|
||
*
|
||
* Gets a list of all extensions that implement this extension point.
|
||
* The list is sorted by priority, beginning with the highest priority.
|
||
*
|
||
* Returns: (element-type GIOExtension) (transfer none): a #GList of
|
||
* #GIOExtensions. The list is owned by GIO and should not be
|
||
* modified.
|
||
*/
|
||
GList *
|
||
g_io_extension_point_get_extensions (GIOExtensionPoint *extension_point)
|
||
{
|
||
g_return_val_if_fail (extension_point != NULL, NULL);
|
||
|
||
lazy_load_modules (extension_point);
|
||
return extension_point->extensions;
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_point_get_extension_by_name:
|
||
* @extension_point: a #GIOExtensionPoint
|
||
* @name: the name of the extension to get
|
||
*
|
||
* Finds a #GIOExtension for an extension point by name.
|
||
*
|
||
* Returns: (transfer none): the #GIOExtension for @extension_point that has the
|
||
* given name, or %NULL if there is no extension with that name
|
||
*/
|
||
GIOExtension *
|
||
g_io_extension_point_get_extension_by_name (GIOExtensionPoint *extension_point,
|
||
const char *name)
|
||
{
|
||
GList *l;
|
||
|
||
g_return_val_if_fail (name != NULL, NULL);
|
||
|
||
lazy_load_modules (extension_point);
|
||
for (l = extension_point->extensions; l != NULL; l = l->next)
|
||
{
|
||
GIOExtension *e = l->data;
|
||
|
||
if (e->name != NULL &&
|
||
strcmp (e->name, name) == 0)
|
||
return e;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static gint
|
||
extension_prio_compare (gconstpointer a,
|
||
gconstpointer b)
|
||
{
|
||
const GIOExtension *extension_a = a, *extension_b = b;
|
||
|
||
if (extension_a->priority > extension_b->priority)
|
||
return -1;
|
||
|
||
if (extension_b->priority > extension_a->priority)
|
||
return 1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_point_implement:
|
||
* @extension_point_name: the name of the extension point
|
||
* @type: the #GType to register as extension
|
||
* @extension_name: the name for the extension
|
||
* @priority: the priority for the extension
|
||
*
|
||
* Registers @type as extension for the extension point with name
|
||
* @extension_point_name.
|
||
*
|
||
* If @type has already been registered as an extension for this
|
||
* extension point, the existing #GIOExtension object is returned.
|
||
*
|
||
* Returns: (transfer none): a #GIOExtension object for #GType
|
||
*/
|
||
GIOExtension *
|
||
g_io_extension_point_implement (const char *extension_point_name,
|
||
GType type,
|
||
const char *extension_name,
|
||
gint priority)
|
||
{
|
||
GIOExtensionPoint *extension_point;
|
||
GIOExtension *extension;
|
||
GList *l;
|
||
|
||
g_return_val_if_fail (extension_point_name != NULL, NULL);
|
||
|
||
extension_point = g_io_extension_point_lookup (extension_point_name);
|
||
if (extension_point == NULL)
|
||
{
|
||
g_warning ("Tried to implement non-registered extension point %s", extension_point_name);
|
||
return NULL;
|
||
}
|
||
|
||
if (extension_point->required_type != 0 &&
|
||
!g_type_is_a (type, extension_point->required_type))
|
||
{
|
||
g_warning ("Tried to register an extension of the type %s to extension point %s. "
|
||
"Expected type is %s.",
|
||
g_type_name (type),
|
||
extension_point_name,
|
||
g_type_name (extension_point->required_type));
|
||
return NULL;
|
||
}
|
||
|
||
/* It's safe to register the same type multiple times */
|
||
for (l = extension_point->extensions; l != NULL; l = l->next)
|
||
{
|
||
extension = l->data;
|
||
if (extension->type == type)
|
||
return extension;
|
||
}
|
||
|
||
extension = g_slice_new0 (GIOExtension);
|
||
extension->type = type;
|
||
extension->name = g_strdup (extension_name);
|
||
extension->priority = priority;
|
||
|
||
extension_point->extensions = g_list_insert_sorted (extension_point->extensions,
|
||
extension, extension_prio_compare);
|
||
|
||
return extension;
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_ref_class:
|
||
* @extension: a #GIOExtension
|
||
*
|
||
* Gets a reference to the class for the type that is
|
||
* associated with @extension.
|
||
*
|
||
* Returns: (transfer full): the #GTypeClass for the type of @extension
|
||
*/
|
||
GTypeClass *
|
||
g_io_extension_ref_class (GIOExtension *extension)
|
||
{
|
||
return g_type_class_ref (extension->type);
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_get_type:
|
||
* @extension: a #GIOExtension
|
||
*
|
||
* Gets the type associated with @extension.
|
||
*
|
||
* Returns: the type of @extension
|
||
*/
|
||
GType
|
||
g_io_extension_get_type (GIOExtension *extension)
|
||
{
|
||
return extension->type;
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_get_name:
|
||
* @extension: a #GIOExtension
|
||
*
|
||
* Gets the name under which @extension was registered.
|
||
*
|
||
* Note that the same type may be registered as extension
|
||
* for multiple extension points, under different names.
|
||
*
|
||
* Returns: the name of @extension.
|
||
*/
|
||
const char *
|
||
g_io_extension_get_name (GIOExtension *extension)
|
||
{
|
||
return extension->name;
|
||
}
|
||
|
||
/**
|
||
* g_io_extension_get_priority:
|
||
* @extension: a #GIOExtension
|
||
*
|
||
* Gets the priority with which @extension was registered.
|
||
*
|
||
* Returns: the priority of @extension
|
||
*/
|
||
gint
|
||
g_io_extension_get_priority (GIOExtension *extension)
|
||
{
|
||
return extension->priority;
|
||
}
|