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c753d26b84
gdbus: Add g_clear_dbus_signal_subscription() inline convenience function See merge request GNOME/glib!4493
752 lines
41 KiB
C
752 lines
41 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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* 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: David Zeuthen <davidz@redhat.com>
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*/
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#ifndef __G_DBUS_CONNECTION_H__
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#define __G_DBUS_CONNECTION_H__
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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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#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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GIO_AVAILABLE_IN_ALL
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GType g_dbus_connection_get_type (void) G_GNUC_CONST;
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/* ---------------------------------------------------------------------------------------------------- */
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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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GDBusConnection *g_bus_get_finish (GAsyncResult *res,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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GDBusConnection *g_dbus_connection_new_finish (GAsyncResult *res,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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GDBusConnection *g_dbus_connection_new_for_address_finish (GAsyncResult *res,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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void g_dbus_connection_start_message_processing (GDBusConnection *connection);
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GIO_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_is_closed (GDBusConnection *connection);
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GIO_AVAILABLE_IN_ALL
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GIOStream *g_dbus_connection_get_stream (GDBusConnection *connection);
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GIO_AVAILABLE_IN_ALL
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const gchar *g_dbus_connection_get_guid (GDBusConnection *connection);
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GIO_AVAILABLE_IN_ALL
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const gchar *g_dbus_connection_get_unique_name (GDBusConnection *connection);
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GIO_AVAILABLE_IN_ALL
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GCredentials *g_dbus_connection_get_peer_credentials (GDBusConnection *connection);
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GIO_AVAILABLE_IN_2_34
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guint32 g_dbus_connection_get_last_serial (GDBusConnection *connection);
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GIO_AVAILABLE_IN_ALL
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gboolean g_dbus_connection_get_exit_on_close (GDBusConnection *connection);
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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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GDBusCapabilityFlags g_dbus_connection_get_capabilities (GDBusConnection *connection);
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GIO_AVAILABLE_IN_2_60
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GDBusConnectionFlags g_dbus_connection_get_flags (GDBusConnection *connection);
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/* ---------------------------------------------------------------------------------------------------- */
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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_AVAILABLE_IN_ALL
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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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#ifdef G_OS_UNIX
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GIO_AVAILABLE_IN_2_30
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void g_dbus_connection_call_with_unix_fd_list (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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GUnixFDList *fd_list,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data);
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GIO_AVAILABLE_IN_2_30
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GVariant *g_dbus_connection_call_with_unix_fd_list_finish (GDBusConnection *connection,
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GUnixFDList **out_fd_list,
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GAsyncResult *res,
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GError **error);
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GIO_AVAILABLE_IN_2_30
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GVariant *g_dbus_connection_call_with_unix_fd_list_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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GUnixFDList *fd_list,
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GUnixFDList **out_fd_list,
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GCancellable *cancellable,
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GError **error);
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#endif /* G_OS_UNIX */
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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: (nullable): The unique bus name of the remote caller, or `NULL` if
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* not specified by the caller, e.g. on peer-to-peer connections.
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* @object_path: The object path that the method was invoked on.
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* @interface_name: (nullable): The D-Bus interface name the method was invoked on,
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* or `NULL` if not specified by the sender.
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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: (transfer full): A #GDBusMethodInvocation object that must 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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* @interface_name may be `NULL` if not specified by the sender, although it’s
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* encouraged for the sender to set it. If unset, and the object has only one
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* method (across all interfaces) matching @method_name, that method is invoked.
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* Otherwise, behaviour is implementation defined. See the
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* [D-Bus specification](https://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-types-method).
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* It is recommended to return [error@Gio.DBusError.UNKNOWN_METHOD].
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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: (nullable): The unique bus name of the remote caller or %NULL if
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* not specified by the caller, e.g. on peer-to-peer connections.
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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: (nullable): The unique bus name of the remote caller or %NULL if
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* not specified by the caller, e.g. on peer-to-peer connections.
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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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* Since 2.38, if you want to handle getting/setting D-Bus properties
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* asynchronously, give %NULL as your get_property() or set_property()
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* function. The D-Bus call will be directed to your @method_call function,
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* with the provided @interface_name set to "org.freedesktop.DBus.Properties".
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*
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* Ownership of the #GDBusMethodInvocation object passed to the
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* method_call() function is transferred to your handler; you must
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* call one of the methods of #GDBusMethodInvocation to return a reply
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* (possibly empty), or an error. These functions also take ownership
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* of the passed-in invocation object, so unless the invocation
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* object has otherwise been referenced, it will be then be freed.
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* Calling one of these functions may be done within your
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* method_call() implementation but it also can be done at a later
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* point to handle the method asynchronously.
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*
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* The usual checks on the validity of the calls is performed. For
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* `Get` calls, an error is automatically returned if the property does
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* not exist or the permissions do not allow access. The same checks are
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* performed for `Set` calls, and the provided value is also checked for
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* being the correct type.
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*
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* For both `Get` and `Set` calls, the #GDBusMethodInvocation
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* passed to the @method_call handler can be queried with
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* g_dbus_method_invocation_get_property_info() to get a pointer
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* to the #GDBusPropertyInfo of the property.
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*
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* If you have readable properties specified in your interface info,
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* you must ensure that you either provide a non-%NULL @get_property()
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* function or provide implementations of both the `Get` and `GetAll`
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* methods on org.freedesktop.DBus.Properties interface in your @method_call
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* function. Note that the required return type of the `Get` call is
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* `(v)`, not the type of the property. `GetAll` expects a return value
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* of type `a{sv}`.
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*
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* If you have writable properties specified in your interface info,
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* you must ensure that you either provide a non-%NULL @set_property()
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* function or provide an implementation of the `Set` call. If implementing
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* the call, you must return the value of type %G_VARIANT_TYPE_UNIT.
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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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GIO_AVAILABLE_IN_ALL
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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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GIO_DEPRECATED_IN_2_84_FOR(g_dbus_connection_register_object_with_closures2)
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guint g_dbus_connection_register_object_with_closures (GDBusConnection *connection,
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const gchar *object_path,
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GDBusInterfaceInfo *interface_info,
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GClosure *method_call_closure,
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GClosure *get_property_closure,
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GClosure *set_property_closure,
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GError **error);
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GIO_AVAILABLE_IN_2_84
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guint g_dbus_connection_register_object_with_closures2 (GDBusConnection *connection,
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const gchar *object_path,
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GDBusInterfaceInfo *interface_info,
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GClosure *method_call_closure,
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GClosure *get_property_closure,
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GClosure *set_property_closure,
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GError **error);
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GIO_AVAILABLE_IN_ALL
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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().
|
||
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
|
||
*
|
||
* The type of the @enumerate function in #GDBusSubtreeVTable.
|
||
*
|
||
* This function is called when generating introspection data and also
|
||
* when preparing to dispatch incoming messages in the event that the
|
||
* %G_DBUS_SUBTREE_FLAGS_DISPATCH_TO_UNENUMERATED_NODES flag is not
|
||
* specified (ie: to verify that the object path is valid).
|
||
*
|
||
* Hierarchies are not supported; the items that you return should not
|
||
* contain the `/` character.
|
||
*
|
||
* The return value will be freed with g_strfreev().
|
||
*
|
||
* Returns: (array zero-terminated=1) (transfer full): A newly allocated array of strings for node names that are children of @object_path.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
typedef gchar** (*GDBusSubtreeEnumerateFunc) (GDBusConnection *connection,
|
||
const gchar *sender,
|
||
const gchar *object_path,
|
||
gpointer user_data);
|
||
|
||
/**
|
||
* GDBusSubtreeIntrospectFunc:
|
||
* @connection: A #GDBusConnection.
|
||
* @sender: The unique bus name of the remote caller.
|
||
* @object_path: The object path that was registered with g_dbus_connection_register_subtree().
|
||
* @node: A node that is a child of @object_path (relative to @object_path) or %NULL for the root of the subtree.
|
||
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
|
||
*
|
||
* The type of the @introspect function in #GDBusSubtreeVTable.
|
||
*
|
||
* Subtrees are flat. @node, if non-%NULL, is always exactly one
|
||
* segment of the object path (ie: it never contains a slash).
|
||
*
|
||
* This function should return %NULL to indicate that there is no object
|
||
* at this node.
|
||
*
|
||
* If this function returns non-%NULL, the return value is expected to
|
||
* be a %NULL-terminated array of pointers to #GDBusInterfaceInfo
|
||
* structures describing the interfaces implemented by @node. This
|
||
* array will have g_dbus_interface_info_unref() called on each item
|
||
* before being freed with g_free().
|
||
*
|
||
* The difference between returning %NULL and an array containing zero
|
||
* items is that the standard DBus interfaces will returned to the
|
||
* remote introspector in the empty array case, but not in the %NULL
|
||
* case.
|
||
*
|
||
* Returns: (array zero-terminated=1) (nullable) (transfer full): A %NULL-terminated array of pointers to #GDBusInterfaceInfo, or %NULL.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
typedef GDBusInterfaceInfo ** (*GDBusSubtreeIntrospectFunc) (GDBusConnection *connection,
|
||
const gchar *sender,
|
||
const gchar *object_path,
|
||
const gchar *node,
|
||
gpointer user_data);
|
||
|
||
/**
|
||
* GDBusSubtreeDispatchFunc:
|
||
* @connection: A #GDBusConnection.
|
||
* @sender: The unique bus name of the remote caller.
|
||
* @object_path: The object path that was registered with g_dbus_connection_register_subtree().
|
||
* @interface_name: The D-Bus interface name that the method call or property access is for.
|
||
* @node: A node that is a child of @object_path (relative to @object_path) or %NULL for the root of the subtree.
|
||
* @out_user_data: (nullable) (not optional): Return location for user data to pass to functions in the returned #GDBusInterfaceVTable.
|
||
* @user_data: The @user_data #gpointer passed to g_dbus_connection_register_subtree().
|
||
*
|
||
* The type of the @dispatch function in #GDBusSubtreeVTable.
|
||
*
|
||
* Subtrees are flat. @node, if non-%NULL, is always exactly one
|
||
* segment of the object path (ie: it never contains a slash).
|
||
*
|
||
* Returns: (nullable): A #GDBusInterfaceVTable or %NULL if you don't want to handle the methods.
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
typedef const GDBusInterfaceVTable * (*GDBusSubtreeDispatchFunc) (GDBusConnection *connection,
|
||
const gchar *sender,
|
||
const gchar *object_path,
|
||
const gchar *interface_name,
|
||
const gchar *node,
|
||
gpointer *out_user_data,
|
||
gpointer user_data);
|
||
|
||
/**
|
||
* GDBusSubtreeVTable:
|
||
* @enumerate: Function for enumerating child nodes.
|
||
* @introspect: Function for introspecting a child node.
|
||
* @dispatch: Function for dispatching a remote call on a child node.
|
||
*
|
||
* Virtual table for handling subtrees registered with g_dbus_connection_register_subtree().
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
struct _GDBusSubtreeVTable
|
||
{
|
||
GDBusSubtreeEnumerateFunc enumerate;
|
||
GDBusSubtreeIntrospectFunc introspect;
|
||
GDBusSubtreeDispatchFunc dispatch;
|
||
|
||
/*< private >*/
|
||
/* Padding for future expansion - also remember to update
|
||
* gdbusconnection.c:_g_dbus_subtree_vtable_copy() when
|
||
* changing this.
|
||
*/
|
||
gpointer padding[8];
|
||
};
|
||
|
||
GIO_AVAILABLE_IN_ALL
|
||
guint g_dbus_connection_register_subtree (GDBusConnection *connection,
|
||
const gchar *object_path,
|
||
const GDBusSubtreeVTable *vtable,
|
||
GDBusSubtreeFlags flags,
|
||
gpointer user_data,
|
||
GDestroyNotify user_data_free_func,
|
||
GError **error);
|
||
GIO_AVAILABLE_IN_ALL
|
||
gboolean g_dbus_connection_unregister_subtree (GDBusConnection *connection,
|
||
guint registration_id);
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
/**
|
||
* GDBusSignalCallback:
|
||
* @connection: A #GDBusConnection.
|
||
* @sender_name: (nullable): The unique bus name of the sender of the signal,
|
||
or %NULL on a peer-to-peer D-Bus connection.
|
||
* @object_path: The object path that the signal was emitted on.
|
||
* @interface_name: The name of the interface.
|
||
* @signal_name: The name of the signal.
|
||
* @parameters: A #GVariant tuple with parameters for the signal.
|
||
* @user_data: User data passed when subscribing to the signal.
|
||
*
|
||
* Signature for callback function used in g_dbus_connection_signal_subscribe().
|
||
*
|
||
* Since: 2.26
|
||
*/
|
||
typedef void (*GDBusSignalCallback) (GDBusConnection *connection,
|
||
const gchar *sender_name,
|
||
const gchar *object_path,
|
||
const gchar *interface_name,
|
||
const gchar *signal_name,
|
||
GVariant *parameters,
|
||
gpointer user_data);
|
||
|
||
GIO_AVAILABLE_IN_ALL
|
||
guint g_dbus_connection_signal_subscribe (GDBusConnection *connection,
|
||
const gchar *sender,
|
||
const gchar *interface_name,
|
||
const gchar *member,
|
||
const gchar *object_path,
|
||
const gchar *arg0,
|
||
GDBusSignalFlags flags,
|
||
GDBusSignalCallback callback,
|
||
gpointer user_data,
|
||
GDestroyNotify user_data_free_func);
|
||
GIO_AVAILABLE_IN_ALL
|
||
void g_dbus_connection_signal_unsubscribe (GDBusConnection *connection,
|
||
guint subscription_id);
|
||
|
||
/**
|
||
* g_clear_dbus_signal_subscription: (skip)
|
||
* @subscription_id_pointer: (not optional) (inout): A pointer to either a
|
||
* subscription ID obtained from [method@Gio.DBusConnection.signal_subscribe],
|
||
* or zero.
|
||
* @connection: The connection from which the subscription ID was obtained.
|
||
* This pointer may be `NULL` or invalid, if the subscription ID is zero.
|
||
*
|
||
* If @subscription_id_pointer points to a nonzero subscription ID,
|
||
* unsubscribe from that D-Bus signal subscription as if via
|
||
* [method@Gio.DBusConnection.signal_unsubscribe].
|
||
*
|
||
* Also set the value pointed to by @subscription_id_pointer to zero,
|
||
* which signifies it’s no longer a valid subscription ID.
|
||
*
|
||
* This convenience function for C code helps to ensure that each signal
|
||
* subscription is unsubscribed exactly once, similar to
|
||
* [func@GObject.clear_object] and [func@GObject.clear_signal_handler].
|
||
*
|
||
* Since: 2.84
|
||
*/
|
||
GLIB_AVAILABLE_STATIC_INLINE_IN_2_84
|
||
static inline void g_clear_dbus_signal_subscription (guint *subscription_id_pointer,
|
||
GDBusConnection *connection);
|
||
|
||
GLIB_AVAILABLE_STATIC_INLINE_IN_2_84
|
||
static inline void
|
||
g_clear_dbus_signal_subscription (guint *subscription_id_pointer,
|
||
GDBusConnection *connection)
|
||
{
|
||
guint subscription_id;
|
||
|
||
/* Suppress "Not available before" warning */
|
||
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
|
||
subscription_id = g_steal_handle_id (subscription_id_pointer);
|
||
G_GNUC_END_IGNORE_DEPRECATIONS
|
||
|
||
if (subscription_id > 0)
|
||
g_dbus_connection_signal_unsubscribe (connection, subscription_id);
|
||
}
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
/**
|
||
* GDBusMessageFilterFunction:
|
||
* @connection: (transfer none): A #GDBusConnection.
|
||
* @message: (transfer full): A locked #GDBusMessage that the filter function takes ownership of.
|
||
* @incoming: %TRUE if it is a message received from the other peer, %FALSE if it is
|
||
* a message to be sent to the other peer.
|
||
* @user_data: User data passed when adding the filter.
|
||
*
|
||
* Signature for function used in g_dbus_connection_add_filter().
|
||
*
|
||
* A filter function is passed a #GDBusMessage and expected to return
|
||
* a #GDBusMessage too. Passive filter functions that don't modify the
|
||
* message can simply return the @message object:
|
||
* |[
|
||
* static GDBusMessage *
|
||
* passive_filter (GDBusConnection *connection
|
||
* GDBusMessage *message,
|
||
* gboolean incoming,
|
||
* gpointer user_data)
|
||
* {
|
||
* // inspect @message
|
||
* 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 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 standard error. Applications can
|
||
* check this ahead of time using g_dbus_message_to_blob() passing a
|
||
* #GDBusCapabilityFlags value obtained from @connection.
|
||
*
|
||
* Returns: (transfer full) (nullable): 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);
|
||
|
||
GIO_AVAILABLE_IN_ALL
|
||
guint g_dbus_connection_add_filter (GDBusConnection *connection,
|
||
GDBusMessageFilterFunction filter_function,
|
||
gpointer user_data,
|
||
GDestroyNotify user_data_free_func);
|
||
|
||
GIO_AVAILABLE_IN_ALL
|
||
void g_dbus_connection_remove_filter (GDBusConnection *connection,
|
||
guint filter_id);
|
||
|
||
/* ---------------------------------------------------------------------------------------------------- */
|
||
|
||
|
||
G_END_DECLS
|
||
|
||
#endif /* __G_DBUS_CONNECTION_H__ */
|