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7c66068544
Ryan pointed out that it's safe to do this because we have the G_DBUS_SEND_MESSAGE_FLAGS_PRESERVE_SERIAL flag and that it simplifies how filter functions work. Signed-off-by: David Zeuthen <davidz@redhat.com>
563 lines
32 KiB
C
563 lines
32 KiB
C
/* GDBus - GLib D-Bus Library
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*
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* Copyright (C) 2008-2010 Red Hat, Inc.
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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 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, write to the
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* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Author: David Zeuthen <davidz@redhat.com>
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*/
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#if !defined (__GIO_GIO_H_INSIDE__) && !defined (GIO_COMPILATION)
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#error "Only <gio/gio.h> can be included directly."
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#endif
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#ifndef __G_DBUS_CONNECTION_H__
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#define __G_DBUS_CONNECTION_H__
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#include <gio/giotypes.h>
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G_BEGIN_DECLS
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#define G_TYPE_DBUS_CONNECTION (g_dbus_connection_get_type ())
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#define G_DBUS_CONNECTION(o) (G_TYPE_CHECK_INSTANCE_CAST ((o), G_TYPE_DBUS_CONNECTION, GDBusConnection))
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#define G_IS_DBUS_CONNECTION(o) (G_TYPE_CHECK_INSTANCE_TYPE ((o), G_TYPE_DBUS_CONNECTION))
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GType g_dbus_connection_get_type (void) G_GNUC_CONST;
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/* ---------------------------------------------------------------------------------------------------- */
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void g_bus_get (GBusType bus_type,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GDBusConnection *g_bus_get_finish (GAsyncResult *res,
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GError **error);
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GDBusConnection *g_bus_get_sync (GBusType bus_type,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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void g_dbus_connection_new (GIOStream *stream,
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const gchar *guid,
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GDBusConnectionFlags flags,
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GDBusAuthObserver *observer,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GDBusConnection *g_dbus_connection_new_finish (GAsyncResult *res,
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GError **error);
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GDBusConnection *g_dbus_connection_new_sync (GIOStream *stream,
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const gchar *guid,
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GDBusConnectionFlags flags,
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GDBusAuthObserver *observer,
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GCancellable *cancellable,
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GError **error);
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void g_dbus_connection_new_for_address (const gchar *address,
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GDBusConnectionFlags flags,
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GDBusAuthObserver *observer,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GDBusConnection *g_dbus_connection_new_for_address_finish (GAsyncResult *res,
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GError **error);
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GDBusConnection *g_dbus_connection_new_for_address_sync (const gchar *address,
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GDBusConnectionFlags flags,
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GDBusAuthObserver *observer,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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void g_dbus_connection_start_message_processing (GDBusConnection *connection);
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gboolean g_dbus_connection_is_closed (GDBusConnection *connection);
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GIOStream *g_dbus_connection_get_stream (GDBusConnection *connection);
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const gchar *g_dbus_connection_get_guid (GDBusConnection *connection);
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const gchar *g_dbus_connection_get_unique_name (GDBusConnection *connection);
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GCredentials *g_dbus_connection_get_peer_credentials (GDBusConnection *connection);
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gboolean g_dbus_connection_get_exit_on_close (GDBusConnection *connection);
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void g_dbus_connection_set_exit_on_close (GDBusConnection *connection,
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gboolean exit_on_close);
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GDBusCapabilityFlags g_dbus_connection_get_capabilities (GDBusConnection *connection);
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/* ---------------------------------------------------------------------------------------------------- */
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void g_dbus_connection_close (GDBusConnection *connection,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gboolean g_dbus_connection_close_finish (GDBusConnection *connection,
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GAsyncResult *res,
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GError **error);
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gboolean g_dbus_connection_close_sync (GDBusConnection *connection,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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void g_dbus_connection_flush (GDBusConnection *connection,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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gboolean g_dbus_connection_flush_finish (GDBusConnection *connection,
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GAsyncResult *res,
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GError **error);
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gboolean g_dbus_connection_flush_sync (GDBusConnection *connection,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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gboolean g_dbus_connection_send_message (GDBusConnection *connection,
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GDBusMessage *message,
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GDBusSendMessageFlags flags,
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volatile guint32 *out_serial,
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GError **error);
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void g_dbus_connection_send_message_with_reply (GDBusConnection *connection,
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GDBusMessage *message,
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GDBusSendMessageFlags flags,
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gint timeout_msec,
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volatile guint32 *out_serial,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GDBusMessage *g_dbus_connection_send_message_with_reply_finish (GDBusConnection *connection,
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GAsyncResult *res,
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GError **error);
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GDBusMessage *g_dbus_connection_send_message_with_reply_sync (GDBusConnection *connection,
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GDBusMessage *message,
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GDBusSendMessageFlags flags,
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gint timeout_msec,
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volatile guint32 *out_serial,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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gboolean g_dbus_connection_emit_signal (GDBusConnection *connection,
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const gchar *destination_bus_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *signal_name,
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GVariant *parameters,
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GError **error);
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void g_dbus_connection_call (GDBusConnection *connection,
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const gchar *bus_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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const GVariantType *reply_type,
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GDBusCallFlags flags,
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gint timeout_msec,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GVariant *g_dbus_connection_call_finish (GDBusConnection *connection,
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GAsyncResult *res,
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GError **error);
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GVariant *g_dbus_connection_call_sync (GDBusConnection *connection,
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const gchar *bus_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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const GVariantType *reply_type,
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GDBusCallFlags flags,
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gint timeout_msec,
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GCancellable *cancellable,
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GError **error);
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/* ---------------------------------------------------------------------------------------------------- */
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/**
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* GDBusInterfaceMethodCallFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that the method was invoked on.
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* @interface_name: The D-Bus interface name the method was invoked on.
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* @method_name: The name of the method that was invoked.
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* @parameters: A #GVariant tuple with parameters.
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* @invocation: A #GDBusMethodInvocation object that can be used to return a value or error.
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
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*
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* The type of the @method_call function in #GDBusInterfaceVTable.
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*
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* Since: 2.26
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*/
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typedef void (*GDBusInterfaceMethodCallFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *method_name,
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GVariant *parameters,
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GDBusMethodInvocation *invocation,
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gpointer user_data);
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/**
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* GDBusInterfaceGetPropertyFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that the method was invoked on.
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* @interface_name: The D-Bus interface name for the property.
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* @property_name: The name of the property to get the value of.
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* @error: Return location for error.
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
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*
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* The type of the @get_property function in #GDBusInterfaceVTable.
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*
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* Returns: A #GVariant with the value for @property_name or %NULL if
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* @error is set. If the returned #GVariant is floating, it is
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* consumed - otherwise its reference count is decreased by one.
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*
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* Since: 2.26
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*/
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typedef GVariant *(*GDBusInterfaceGetPropertyFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GError **error,
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gpointer user_data);
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/**
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* GDBusInterfaceSetPropertyFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that the method was invoked on.
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* @interface_name: The D-Bus interface name for the property.
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* @property_name: The name of the property to get the value of.
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* @value: The value to set the property to.
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* @error: Return location for error.
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_object().
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*
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* The type of the @set_property function in #GDBusInterfaceVTable.
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*
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* Returns: %TRUE if the property was set to @value, %FALSE if @error is set.
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*
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* Since: 2.26
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*/
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typedef gboolean (*GDBusInterfaceSetPropertyFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *property_name,
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GVariant *value,
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GError **error,
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gpointer user_data);
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/**
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* GDBusInterfaceVTable:
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* @method_call: Function for handling incoming method calls.
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* @get_property: Function for getting a property.
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* @set_property: Function for setting a property.
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*
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* Virtual table for handling properties and method calls for a D-Bus
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* interface.
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*
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* If you want to handle getting/setting D-Bus properties asynchronously, simply
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* register an object with the <literal>org.freedesktop.DBus.Properties</literal>
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* D-Bus interface using g_dbus_connection_register_object().
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*
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* Since: 2.26
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*/
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struct _GDBusInterfaceVTable
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{
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GDBusInterfaceMethodCallFunc method_call;
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GDBusInterfaceGetPropertyFunc get_property;
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GDBusInterfaceSetPropertyFunc set_property;
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/*< private >*/
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/* Padding for future expansion - also remember to update
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* gdbusconnection.c:_g_dbus_interface_vtable_copy() when
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* changing this.
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*/
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gpointer padding[8];
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};
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guint g_dbus_connection_register_object (GDBusConnection *connection,
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const gchar *object_path,
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GDBusInterfaceInfo *interface_info,
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const GDBusInterfaceVTable *vtable,
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gpointer user_data,
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GDestroyNotify user_data_free_func,
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GError **error);
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gboolean g_dbus_connection_unregister_object (GDBusConnection *connection,
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guint registration_id);
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/* ---------------------------------------------------------------------------------------------------- */
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/**
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* GDBusSubtreeEnumerateFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that was registered with g_dbus_connection_register_subtree().
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
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*
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* The type of the @enumerate function in #GDBusSubtreeVTable.
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*
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* This function is called when generating introspection data and also
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* when preparing to dispatch incoming messages in the event that the
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* %G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES flag is not
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* specified (ie: to verify that the object path is valid).
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*
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* Hierarchies are not supported; the items that you return should not
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* contain the '/' character.
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*
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* The return value will be freed with g_strfreev().
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*
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* Returns: A newly allocated array of strings for node names that are children of @object_path.
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*
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* Since: 2.26
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*/
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typedef gchar** (*GDBusSubtreeEnumerateFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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gpointer user_data);
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/**
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* GDBusSubtreeIntrospectFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that was registered with g_dbus_connection_register_subtree().
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* @node: A node that is a child of @object_path (relative to @object_path) or %NULL for the root of the subtree.
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
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*
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* The type of the @introspect function in #GDBusSubtreeVTable.
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*
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* Subtrees are flat. @node, if non-%NULL, is always exactly one
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* segment of the object path (ie: it never contains a slash).
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*
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* This function should return %NULL to indicate that there is no object
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* at this node.
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*
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* If this function returns non-%NULL, the return value is expected to
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* be a %NULL-terminated array of pointers to #GDBusInterfaceInfo
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* structures describing the interfaces implemented by @node. This
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* array will have g_dbus_interface_info_unref() called on each item
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* before being freed with g_free().
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*
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* The difference between returning %NULL and an array containing zero
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* items is that the standard DBus interfaces will returned to the
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* remote introspector in the empty array case, but not in the %NULL
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* case.
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*
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* Returns: A %NULL-terminated array of pointers to #GDBusInterfaceInfo, or %NULL.
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*
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* Since: 2.26
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*/
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typedef GDBusInterfaceInfo ** (*GDBusSubtreeIntrospectFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *node,
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gpointer user_data);
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/**
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* GDBusSubtreeDispatchFunc:
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* @connection: A #GDBusConnection.
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* @sender: The unique bus name of the remote caller.
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* @object_path: The object path that was registered with g_dbus_connection_register_subtree().
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* @interface_name: The D-Bus interface name that the method call or property access is for.
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* @node: A node that is a child of @object_path (relative to @object_path) or %NULL for the root of the subtree.
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* @out_user_data: Return location for user data to pass to functions in the returned #GDBusInterfaceVTable (never %NULL).
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* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
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*
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* The type of the @dispatch function in #GDBusSubtreeVTable.
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*
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* Subtrees are flat. @node, if non-%NULL, is always exactly one
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* segment of the object path (ie: it never contains a slash).
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*
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* Returns: A #GDBusInterfaceVTable or %NULL if you don't want to handle the methods.
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*
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* Since: 2.26
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*/
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typedef const GDBusInterfaceVTable * (*GDBusSubtreeDispatchFunc) (GDBusConnection *connection,
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const gchar *sender,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *node,
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gpointer *out_user_data,
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gpointer user_data);
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/**
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* GDBusSubtreeVTable:
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* @enumerate: Function for enumerating child nodes.
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* @introspect: Function for introspecting a child node.
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* @dispatch: Function for dispatching a remote call on a child node.
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*
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* Virtual table for handling subtrees registered with g_dbus_connection_register_subtree().
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*
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* Since: 2.26
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*/
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struct _GDBusSubtreeVTable
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{
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GDBusSubtreeEnumerateFunc enumerate;
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GDBusSubtreeIntrospectFunc introspect;
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GDBusSubtreeDispatchFunc dispatch;
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/*< private >*/
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/* Padding for future expansion - also remember to update
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* gdbusconnection.c:_g_dbus_subtree_vtable_copy() when
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* changing this.
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*/
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gpointer padding[8];
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};
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guint g_dbus_connection_register_subtree (GDBusConnection *connection,
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const gchar *object_path,
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const GDBusSubtreeVTable *vtable,
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GDBusSubtreeFlags flags,
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gpointer user_data,
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GDestroyNotify user_data_free_func,
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GError **error);
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gboolean g_dbus_connection_unregister_subtree (GDBusConnection *connection,
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guint registration_id);
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/* ---------------------------------------------------------------------------------------------------- */
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/**
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* GDBusSignalCallback:
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* @connection: A #GDBusConnection.
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* @sender_name: The unique bus name of the sender of the signal.
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* @object_path: The object path that the signal was emitted on.
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* @interface_name: The name of the interface.
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* @signal_name: The name of the signal.
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* @parameters: A #GVariant tuple with parameters for the signal.
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* @user_data: User data passed when subscribing to the signal.
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*
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* Signature for callback function used in g_dbus_connection_signal_subscribe().
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*
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* Since: 2.26
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*/
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typedef void (*GDBusSignalCallback) (GDBusConnection *connection,
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const gchar *sender_name,
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const gchar *object_path,
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const gchar *interface_name,
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const gchar *signal_name,
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GVariant *parameters,
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gpointer user_data);
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guint g_dbus_connection_signal_subscribe (GDBusConnection *connection,
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const gchar *sender,
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const gchar *interface_name,
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const gchar *member,
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const gchar *object_path,
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const gchar *arg0,
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GDBusSignalFlags flags,
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GDBusSignalCallback callback,
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gpointer user_data,
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GDestroyNotify user_data_free_func);
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void g_dbus_connection_signal_unsubscribe (GDBusConnection *connection,
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guint subscription_id);
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/* ---------------------------------------------------------------------------------------------------- */
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/**
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* GDBusMessageFilterFunction:
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* @connection: (transfer none): A #GDBusConnection.
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* @message: (transfer full): A locked #GDBusMessage that the filter function takes ownership of.
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* @incoming: %TRUE if it is a message received from the other peer, %FALSE if it is
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* a message to be sent to the other peer.
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* @user_data: User data passed when adding the filter.
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*
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* Signature for function used in g_dbus_connection_add_filter().
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*
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* A filter function is passed a #GDBusMessage and expected to return
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* a #GDBusMessage too. Passive filter functions that don't modify the
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* message can simply return the @message object:
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* |[
|
|
* static GDBusMessage *
|
|
* passive_filter (GDBusConnection *connection
|
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* GDBusMessage *message,
|
|
* gboolean incoming,
|
|
* gpointer user_data)
|
|
* {
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* /<!-- -->* inspect @message *<!-- -->/
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|
* return message;
|
|
* }
|
|
* ]|
|
|
* Filter functions that wants to drop a message can simply return %NULL:
|
|
* |[
|
|
* static GDBusMessage *
|
|
* drop_filter (GDBusConnection *connection
|
|
* GDBusMessage *message,
|
|
* gboolean incoming,
|
|
* gpointer user_data)
|
|
* {
|
|
* if (should_drop_message)
|
|
* {
|
|
* g_object_unref (message);
|
|
* message = NULL;
|
|
* }
|
|
* return message;
|
|
* }
|
|
* ]|
|
|
* Finally, a filter function may modify a message by copying it:
|
|
* |[
|
|
* static GDBusMessage *
|
|
* modifying_filter (GDBusConnection *connection
|
|
* GDBusMessage *message,
|
|
* gboolean incoming,
|
|
* gpointer user_data)
|
|
* {
|
|
* GDBusMessage *copy;
|
|
* GError *error;
|
|
*
|
|
* error = NULL;
|
|
* copy = g_dbus_message_copy (message, &error);
|
|
* /<!-- -->* handle @error being is set *<!-- -->/
|
|
* g_object_unref (message);
|
|
*
|
|
* /<!-- -->* modify @copy *<!-- -->/
|
|
*
|
|
* return copy;
|
|
* }
|
|
* ]|
|
|
* If the returned #GDBusMessage is different from @message and cannot
|
|
* be sent on @connection (it could use features, such as file
|
|
* descriptors, not compatible with @connection), then a warning is
|
|
* logged to <emphasis>standard error</emphasis>. Applications can
|
|
* check this ahead of time using g_dbus_message_to_blob() passing a
|
|
* #GDBusCapabilityFlags value obtained from @connection.
|
|
*
|
|
* Returns: (transfer full) (allow-none): A #GDBusMessage that will be freed with
|
|
* g_object_unref() or %NULL to drop the message. Passive filter
|
|
* functions can simply return the passed @message object.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
typedef GDBusMessage *(*GDBusMessageFilterFunction) (GDBusConnection *connection,
|
|
GDBusMessage *message,
|
|
gboolean incoming,
|
|
gpointer user_data);
|
|
|
|
guint g_dbus_connection_add_filter (GDBusConnection *connection,
|
|
GDBusMessageFilterFunction filter_function,
|
|
gpointer user_data,
|
|
GDestroyNotify user_data_free_func);
|
|
|
|
void g_dbus_connection_remove_filter (GDBusConnection *connection,
|
|
guint filter_id);
|
|
|
|
/* ---------------------------------------------------------------------------------------------------- */
|
|
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __G_DBUS_CONNECTION_H__ */
|