mirror of
https://gitlab.gnome.org/GNOME/glib.git
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59f1f54655
Add g_main_context_ref_thread_default(), which always returns a reffed GMainContext, rather than sometimes returning a (non-reffed) GMainContext, and sometimes returning NULL. This simplifies the bookkeeping in any code that needs to keep a reference to the thread-default context for a while. https://bugzilla.gnome.org/show_bug.cgi?id=660994
922 lines
31 KiB
C
922 lines
31 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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#include "config.h"
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#include <stdlib.h>
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#include "gdbusutils.h"
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#include "gdbusnameowning.h"
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#include "gdbuserror.h"
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#include "gdbusprivate.h"
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#include "gdbusconnection.h"
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#include "glibintl.h"
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/**
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* SECTION:gdbusnameowning
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* @title: Owning Bus Names
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* @short_description: Simple API for owning bus names
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* @include: gio/gio.h
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*
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* Convenience API for owning bus names.
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*
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* <example id="gdbus-owning-names"><title>Simple application owning a name</title><programlisting><xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gdbus-example-own-name.c"><xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback></xi:include></programlisting></example>
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*/
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G_LOCK_DEFINE_STATIC (lock);
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/* ---------------------------------------------------------------------------------------------------- */
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typedef enum
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{
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PREVIOUS_CALL_NONE = 0,
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PREVIOUS_CALL_ACQUIRED,
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PREVIOUS_CALL_LOST,
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} PreviousCall;
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typedef struct
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{
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volatile gint ref_count;
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guint id;
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GBusNameOwnerFlags flags;
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gchar *name;
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GBusAcquiredCallback bus_acquired_handler;
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GBusNameAcquiredCallback name_acquired_handler;
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GBusNameLostCallback name_lost_handler;
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gpointer user_data;
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GDestroyNotify user_data_free_func;
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GMainContext *main_context;
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PreviousCall previous_call;
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GDBusConnection *connection;
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gulong disconnected_signal_handler_id;
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guint name_acquired_subscription_id;
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guint name_lost_subscription_id;
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gboolean cancelled;
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gboolean needs_release;
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} Client;
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static guint next_global_id = 1;
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static GHashTable *map_id_to_client = NULL;
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static Client *
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client_ref (Client *client)
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{
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g_atomic_int_inc (&client->ref_count);
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return client;
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}
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static void
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client_unref (Client *client)
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{
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if (g_atomic_int_dec_and_test (&client->ref_count))
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{
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if (client->connection != NULL)
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{
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if (client->disconnected_signal_handler_id > 0)
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g_signal_handler_disconnect (client->connection, client->disconnected_signal_handler_id);
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if (client->name_acquired_subscription_id > 0)
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g_dbus_connection_signal_unsubscribe (client->connection, client->name_acquired_subscription_id);
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if (client->name_lost_subscription_id > 0)
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g_dbus_connection_signal_unsubscribe (client->connection, client->name_lost_subscription_id);
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g_object_unref (client->connection);
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}
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g_main_context_unref (client->main_context);
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g_free (client->name);
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if (client->user_data_free_func != NULL)
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client->user_data_free_func (client->user_data);
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g_free (client);
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}
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}
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/* ---------------------------------------------------------------------------------------------------- */
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typedef enum
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{
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CALL_TYPE_NAME_ACQUIRED,
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CALL_TYPE_NAME_LOST
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} CallType;
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typedef struct
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{
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Client *client;
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/* keep this separate because client->connection may
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* be set to NULL after scheduling the call
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*/
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GDBusConnection *connection;
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/* set to TRUE to call acquired */
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CallType call_type;
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} CallHandlerData;
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static void
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call_handler_data_free (CallHandlerData *data)
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{
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if (data->connection != NULL)
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g_object_unref (data->connection);
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client_unref (data->client);
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g_free (data);
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}
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static void
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actually_do_call (Client *client, GDBusConnection *connection, CallType call_type)
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{
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switch (call_type)
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{
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case CALL_TYPE_NAME_ACQUIRED:
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if (client->name_acquired_handler != NULL)
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{
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client->name_acquired_handler (connection,
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client->name,
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client->user_data);
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}
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break;
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case CALL_TYPE_NAME_LOST:
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if (client->name_lost_handler != NULL)
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{
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client->name_lost_handler (connection,
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client->name,
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client->user_data);
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}
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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}
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static gboolean
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call_in_idle_cb (gpointer _data)
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{
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CallHandlerData *data = _data;
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actually_do_call (data->client, data->connection, data->call_type);
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return FALSE;
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}
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static void
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schedule_call_in_idle (Client *client, CallType call_type)
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{
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CallHandlerData *data;
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GSource *idle_source;
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data = g_new0 (CallHandlerData, 1);
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data->client = client_ref (client);
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data->connection = client->connection != NULL ? g_object_ref (client->connection) : NULL;
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data->call_type = call_type;
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idle_source = g_idle_source_new ();
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g_source_set_priority (idle_source, G_PRIORITY_HIGH);
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g_source_set_callback (idle_source,
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call_in_idle_cb,
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data,
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(GDestroyNotify) call_handler_data_free);
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g_source_attach (idle_source, client->main_context);
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g_source_unref (idle_source);
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}
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static void
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do_call (Client *client, CallType call_type)
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{
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GMainContext *current_context;
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/* only schedule in idle if we're not in the right thread */
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current_context = g_main_context_ref_thread_default ();
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if (current_context != client->main_context)
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schedule_call_in_idle (client, call_type);
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else
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actually_do_call (client, client->connection, call_type);
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g_main_context_unref (current_context);
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}
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static void
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call_acquired_handler (Client *client)
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{
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if (client->previous_call != PREVIOUS_CALL_ACQUIRED)
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{
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client->previous_call = PREVIOUS_CALL_ACQUIRED;
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if (!client->cancelled)
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{
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do_call (client, CALL_TYPE_NAME_ACQUIRED);
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}
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}
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}
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static void
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call_lost_handler (Client *client)
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{
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if (client->previous_call != PREVIOUS_CALL_LOST)
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{
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client->previous_call = PREVIOUS_CALL_LOST;
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if (!client->cancelled)
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{
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do_call (client, CALL_TYPE_NAME_LOST);
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}
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}
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}
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/* ---------------------------------------------------------------------------------------------------- */
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static void
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on_name_lost_or_acquired (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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{
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Client *client = user_data;
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const gchar *name;
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if (g_strcmp0 (object_path, "/org/freedesktop/DBus") != 0 ||
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g_strcmp0 (interface_name, "org.freedesktop.DBus") != 0 ||
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g_strcmp0 (sender_name, "org.freedesktop.DBus") != 0)
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goto out;
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if (g_strcmp0 (signal_name, "NameLost") == 0)
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{
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g_variant_get (parameters, "(&s)", &name);
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if (g_strcmp0 (name, client->name) == 0)
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{
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call_lost_handler (client);
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}
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}
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else if (g_strcmp0 (signal_name, "NameAcquired") == 0)
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{
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g_variant_get (parameters, "(&s)", &name);
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if (g_strcmp0 (name, client->name) == 0)
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{
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call_acquired_handler (client);
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}
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}
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out:
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;
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}
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/* ---------------------------------------------------------------------------------------------------- */
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static void
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request_name_cb (GObject *source_object,
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GAsyncResult *res,
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gpointer user_data)
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{
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Client *client = user_data;
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GVariant *result;
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guint32 request_name_reply;
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gboolean subscribe;
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request_name_reply = 0;
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result = NULL;
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result = g_dbus_connection_call_finish (client->connection,
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res,
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NULL);
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if (result != NULL)
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{
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g_variant_get (result, "(u)", &request_name_reply);
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g_variant_unref (result);
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}
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subscribe = FALSE;
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switch (request_name_reply)
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{
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case 1: /* DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER */
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/* We got the name - now listen for NameLost and NameAcquired */
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call_acquired_handler (client);
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subscribe = TRUE;
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client->needs_release = TRUE;
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break;
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case 2: /* DBUS_REQUEST_NAME_REPLY_IN_QUEUE */
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/* Waiting in line - listen for NameLost and NameAcquired */
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call_lost_handler (client);
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subscribe = TRUE;
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client->needs_release = TRUE;
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break;
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default:
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/* assume we couldn't get the name - explicit fallthrough */
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case 3: /* DBUS_REQUEST_NAME_REPLY_EXISTS */
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case 4: /* DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER */
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/* Some other part of the process is already owning the name */
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call_lost_handler (client);
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break;
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}
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if (subscribe)
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{
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/* start listening to NameLost and NameAcquired messages */
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client->name_lost_subscription_id =
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g_dbus_connection_signal_subscribe (client->connection,
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"org.freedesktop.DBus",
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"org.freedesktop.DBus",
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"NameLost",
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"/org/freedesktop/DBus",
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client->name,
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G_DBUS_SIGNAL_FLAGS_NONE,
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on_name_lost_or_acquired,
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client,
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NULL);
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client->name_acquired_subscription_id =
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g_dbus_connection_signal_subscribe (client->connection,
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"org.freedesktop.DBus",
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"org.freedesktop.DBus",
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"NameAcquired",
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"/org/freedesktop/DBus",
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client->name,
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G_DBUS_SIGNAL_FLAGS_NONE,
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on_name_lost_or_acquired,
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client,
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NULL);
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}
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client_unref (client);
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}
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/* ---------------------------------------------------------------------------------------------------- */
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static void
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on_connection_disconnected (GDBusConnection *connection,
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gboolean remote_peer_vanished,
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GError *error,
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gpointer user_data)
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{
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Client *client = user_data;
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if (client->disconnected_signal_handler_id > 0)
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g_signal_handler_disconnect (client->connection, client->disconnected_signal_handler_id);
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if (client->name_acquired_subscription_id > 0)
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g_dbus_connection_signal_unsubscribe (client->connection, client->name_acquired_subscription_id);
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if (client->name_lost_subscription_id > 0)
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g_dbus_connection_signal_unsubscribe (client->connection, client->name_lost_subscription_id);
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g_object_unref (client->connection);
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client->disconnected_signal_handler_id = 0;
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client->name_acquired_subscription_id = 0;
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client->name_lost_subscription_id = 0;
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client->connection = NULL;
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call_lost_handler (client);
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}
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/* ---------------------------------------------------------------------------------------------------- */
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static void
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has_connection (Client *client)
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{
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/* listen for disconnection */
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client->disconnected_signal_handler_id = g_signal_connect (client->connection,
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"closed",
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G_CALLBACK (on_connection_disconnected),
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client);
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/* attempt to acquire the name */
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g_dbus_connection_call (client->connection,
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"org.freedesktop.DBus", /* bus name */
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"/org/freedesktop/DBus", /* object path */
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"org.freedesktop.DBus", /* interface name */
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"RequestName", /* method name */
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g_variant_new ("(su)",
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client->name,
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client->flags),
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G_VARIANT_TYPE ("(u)"),
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G_DBUS_CALL_FLAGS_NONE,
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-1,
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NULL,
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(GAsyncReadyCallback) request_name_cb,
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client_ref (client));
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}
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static void
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connection_get_cb (GObject *source_object,
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GAsyncResult *res,
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gpointer user_data)
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{
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Client *client = user_data;
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client->connection = g_bus_get_finish (res, NULL);
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if (client->connection == NULL)
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{
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call_lost_handler (client);
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goto out;
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}
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/* No need to schedule this in idle as we're already in the thread
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* that the user called g_bus_own_name() from. This is because
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* g_bus_get() guarantees that.
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*
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* Also, we need to ensure that the handler is invoked *before*
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* we call RequestName(). Otherwise there is a race.
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*/
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if (client->bus_acquired_handler != NULL)
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{
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client->bus_acquired_handler (client->connection,
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client->name,
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client->user_data);
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}
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has_connection (client);
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out:
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client_unref (client);
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}
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/* ---------------------------------------------------------------------------------------------------- */
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/**
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* g_bus_own_name_on_connection:
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* @connection: A #GDBusConnection.
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* @name: The well-known name to own.
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* @flags: A set of flags from the #GBusNameOwnerFlags enumeration.
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* @name_acquired_handler: Handler to invoke when @name is acquired or %NULL.
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* @name_lost_handler: Handler to invoke when @name is lost or %NULL.
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* @user_data: User data to pass to handlers.
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* @user_data_free_func: Function for freeing @user_data or %NULL.
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*
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* Like g_bus_own_name() but takes a #GDBusConnection instead of a
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* #GBusType.
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*
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* Returns: An identifier (never 0) that an be used with
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* g_bus_unown_name() to stop owning the name.
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*
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* Since: 2.26
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*/
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guint
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g_bus_own_name_on_connection (GDBusConnection *connection,
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const gchar *name,
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GBusNameOwnerFlags flags,
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GBusNameAcquiredCallback name_acquired_handler,
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GBusNameLostCallback name_lost_handler,
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gpointer user_data,
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GDestroyNotify user_data_free_func)
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{
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Client *client;
|
|
|
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g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
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g_return_val_if_fail (g_dbus_is_name (name) && !g_dbus_is_unique_name (name), 0);
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|
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G_LOCK (lock);
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|
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client = g_new0 (Client, 1);
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client->ref_count = 1;
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client->id = next_global_id++; /* TODO: uh oh, handle overflow */
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client->name = g_strdup (name);
|
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client->flags = flags;
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client->name_acquired_handler = name_acquired_handler;
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client->name_lost_handler = name_lost_handler;
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client->user_data = user_data;
|
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client->user_data_free_func = user_data_free_func;
|
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client->main_context = g_main_context_ref_thread_default ();
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|
|
|
client->connection = g_object_ref (connection);
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|
|
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if (map_id_to_client == NULL)
|
|
{
|
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map_id_to_client = g_hash_table_new (g_direct_hash, g_direct_equal);
|
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}
|
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g_hash_table_insert (map_id_to_client,
|
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GUINT_TO_POINTER (client->id),
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client);
|
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|
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G_UNLOCK (lock);
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|
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has_connection (client);
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|
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return client->id;
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}
|
|
|
|
/**
|
|
* g_bus_own_name:
|
|
* @bus_type: The type of bus to own a name on.
|
|
* @name: The well-known name to own.
|
|
* @flags: A set of flags from the #GBusNameOwnerFlags enumeration.
|
|
* @bus_acquired_handler: Handler to invoke when connected to the bus of type @bus_type or %NULL.
|
|
* @name_acquired_handler: Handler to invoke when @name is acquired or %NULL.
|
|
* @name_lost_handler: Handler to invoke when @name is lost or %NULL.
|
|
* @user_data: User data to pass to handlers.
|
|
* @user_data_free_func: Function for freeing @user_data or %NULL.
|
|
*
|
|
* Starts acquiring @name on the bus specified by @bus_type and calls
|
|
* @name_acquired_handler and @name_lost_handler when the name is
|
|
* acquired respectively lost. Callbacks will be invoked in the <link
|
|
* linkend="g-main-context-push-thread-default">thread-default main
|
|
* loop</link> of the thread you are calling this function from.
|
|
*
|
|
* You are guaranteed that one of the @name_acquired_handler and @name_lost_handler
|
|
* callbacks will be invoked after calling this function - there are three
|
|
* possible cases:
|
|
* <itemizedlist>
|
|
* <listitem><para>
|
|
* @name_lost_handler with a %NULL connection (if a connection to the bus can't be made).
|
|
* </para></listitem>
|
|
* <listitem><para>
|
|
* @bus_acquired_handler then @name_lost_handler (if the name can't be obtained)
|
|
* </para></listitem>
|
|
* <listitem><para>
|
|
* @bus_acquired_handler then @name_acquired_handler (if the name was obtained).
|
|
* </para></listitem>
|
|
* </itemizedlist>
|
|
* When you are done owning the name, just call g_bus_unown_name()
|
|
* with the owner id this function returns.
|
|
*
|
|
* If the name is acquired or lost (for example another application
|
|
* could acquire the name if you allow replacement or the application
|
|
* currently owning the name exits), the handlers are also invoked. If the
|
|
* #GDBusConnection that is used for attempting to own the name
|
|
* closes, then @name_lost_handler is invoked since it is no
|
|
* longer possible for other processes to access the process.
|
|
*
|
|
* You cannot use g_bus_own_name() several times for the same name (unless
|
|
* interleaved with calls to g_bus_unown_name()) - only the first call
|
|
* will work.
|
|
*
|
|
* Another guarantee is that invocations of @name_acquired_handler
|
|
* and @name_lost_handler are guaranteed to alternate; that
|
|
* is, if @name_acquired_handler is invoked then you are
|
|
* guaranteed that the next time one of the handlers is invoked, it
|
|
* will be @name_lost_handler. The reverse is also true.
|
|
*
|
|
* If you plan on exporting objects (using e.g.
|
|
* g_dbus_connection_register_object()), note that it is generally too late
|
|
* to export the objects in @name_acquired_handler. Instead, you can do this
|
|
* in @bus_acquired_handler since you are guaranteed that this will run
|
|
* before @name is requested from the bus.
|
|
*
|
|
* This behavior makes it very simple to write applications that wants
|
|
* to own names and export objects, see <xref linkend="gdbus-owning-names"/>.
|
|
* Simply register objects to be exported in @bus_acquired_handler and
|
|
* unregister the objects (if any) in @name_lost_handler.
|
|
*
|
|
* Returns: An identifier (never 0) that an be used with
|
|
* g_bus_unown_name() to stop owning the name.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
guint
|
|
g_bus_own_name (GBusType bus_type,
|
|
const gchar *name,
|
|
GBusNameOwnerFlags flags,
|
|
GBusAcquiredCallback bus_acquired_handler,
|
|
GBusNameAcquiredCallback name_acquired_handler,
|
|
GBusNameLostCallback name_lost_handler,
|
|
gpointer user_data,
|
|
GDestroyNotify user_data_free_func)
|
|
{
|
|
Client *client;
|
|
|
|
g_return_val_if_fail (g_dbus_is_name (name) && !g_dbus_is_unique_name (name), 0);
|
|
|
|
G_LOCK (lock);
|
|
|
|
client = g_new0 (Client, 1);
|
|
client->ref_count = 1;
|
|
client->id = next_global_id++; /* TODO: uh oh, handle overflow */
|
|
client->name = g_strdup (name);
|
|
client->flags = flags;
|
|
client->bus_acquired_handler = bus_acquired_handler;
|
|
client->name_acquired_handler = name_acquired_handler;
|
|
client->name_lost_handler = name_lost_handler;
|
|
client->user_data = user_data;
|
|
client->user_data_free_func = user_data_free_func;
|
|
client->main_context = g_main_context_ref_thread_default ();
|
|
|
|
if (map_id_to_client == NULL)
|
|
{
|
|
map_id_to_client = g_hash_table_new (g_direct_hash, g_direct_equal);
|
|
}
|
|
g_hash_table_insert (map_id_to_client,
|
|
GUINT_TO_POINTER (client->id),
|
|
client);
|
|
|
|
g_bus_get (bus_type,
|
|
NULL,
|
|
connection_get_cb,
|
|
client_ref (client));
|
|
|
|
G_UNLOCK (lock);
|
|
|
|
return client->id;
|
|
}
|
|
|
|
typedef struct {
|
|
GClosure *bus_acquired_closure;
|
|
GClosure *name_acquired_closure;
|
|
GClosure *name_lost_closure;
|
|
} OwnNameData;
|
|
|
|
static OwnNameData *
|
|
own_name_data_new (GClosure *bus_acquired_closure,
|
|
GClosure *name_acquired_closure,
|
|
GClosure *name_lost_closure)
|
|
{
|
|
OwnNameData *data;
|
|
|
|
data = g_new0 (OwnNameData, 1);
|
|
|
|
if (bus_acquired_closure != NULL)
|
|
{
|
|
data->bus_acquired_closure = g_closure_ref (bus_acquired_closure);
|
|
g_closure_sink (bus_acquired_closure);
|
|
if (G_CLOSURE_NEEDS_MARSHAL (bus_acquired_closure))
|
|
g_closure_set_marshal (bus_acquired_closure, g_cclosure_marshal_generic);
|
|
}
|
|
|
|
if (name_acquired_closure != NULL)
|
|
{
|
|
data->name_acquired_closure = g_closure_ref (name_acquired_closure);
|
|
g_closure_sink (name_acquired_closure);
|
|
if (G_CLOSURE_NEEDS_MARSHAL (name_acquired_closure))
|
|
g_closure_set_marshal (name_acquired_closure, g_cclosure_marshal_generic);
|
|
}
|
|
|
|
if (name_lost_closure != NULL)
|
|
{
|
|
data->name_lost_closure = g_closure_ref (name_lost_closure);
|
|
g_closure_sink (name_lost_closure);
|
|
if (G_CLOSURE_NEEDS_MARSHAL (name_lost_closure))
|
|
g_closure_set_marshal (name_lost_closure, g_cclosure_marshal_generic);
|
|
}
|
|
|
|
return data;
|
|
}
|
|
|
|
static void
|
|
own_with_closures_on_bus_acquired (GDBusConnection *connection,
|
|
const gchar *name,
|
|
gpointer user_data)
|
|
{
|
|
OwnNameData *data = user_data;
|
|
GValue params[2] = { { 0, }, { 0, } };
|
|
|
|
g_value_init (¶ms[0], G_TYPE_DBUS_CONNECTION);
|
|
g_value_set_object (¶ms[0], connection);
|
|
|
|
g_value_init (¶ms[1], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[1], name);
|
|
|
|
g_closure_invoke (data->bus_acquired_closure, NULL, 2, params, NULL);
|
|
|
|
g_value_unset (params + 0);
|
|
g_value_unset (params + 1);
|
|
}
|
|
|
|
static void
|
|
own_with_closures_on_name_acquired (GDBusConnection *connection,
|
|
const gchar *name,
|
|
gpointer user_data)
|
|
{
|
|
OwnNameData *data = user_data;
|
|
GValue params[2] = { { 0, }, { 0, } };
|
|
|
|
g_value_init (¶ms[0], G_TYPE_DBUS_CONNECTION);
|
|
g_value_set_object (¶ms[0], connection);
|
|
|
|
g_value_init (¶ms[1], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[1], name);
|
|
|
|
g_closure_invoke (data->name_acquired_closure, NULL, 2, params, NULL);
|
|
|
|
g_value_unset (params + 0);
|
|
g_value_unset (params + 1);
|
|
}
|
|
|
|
static void
|
|
own_with_closures_on_name_lost (GDBusConnection *connection,
|
|
const gchar *name,
|
|
gpointer user_data)
|
|
{
|
|
OwnNameData *data = user_data;
|
|
GValue params[2] = { { 0, }, { 0, } };
|
|
|
|
g_value_init (¶ms[0], G_TYPE_DBUS_CONNECTION);
|
|
g_value_set_object (¶ms[0], connection);
|
|
|
|
g_value_init (¶ms[1], G_TYPE_STRING);
|
|
g_value_set_string (¶ms[1], name);
|
|
|
|
g_closure_invoke (data->name_lost_closure, NULL, 2, params, NULL);
|
|
|
|
g_value_unset (params + 0);
|
|
g_value_unset (params + 1);
|
|
}
|
|
|
|
static void
|
|
bus_own_name_free_func (gpointer user_data)
|
|
{
|
|
OwnNameData *data = user_data;
|
|
|
|
if (data->bus_acquired_closure != NULL)
|
|
g_closure_unref (data->bus_acquired_closure);
|
|
|
|
if (data->name_acquired_closure != NULL)
|
|
g_closure_unref (data->name_acquired_closure);
|
|
|
|
if (data->name_lost_closure != NULL)
|
|
g_closure_unref (data->name_lost_closure);
|
|
|
|
g_free (data);
|
|
}
|
|
|
|
/**
|
|
* g_bus_own_name_with_closures:
|
|
* @bus_type: The type of bus to own a name on.
|
|
* @name: The well-known name to own.
|
|
* @flags: A set of flags from the #GBusNameOwnerFlags enumeration.
|
|
* @bus_acquired_closure: (allow-none): #GClosure to invoke when connected to
|
|
* the bus of type @bus_type or %NULL.
|
|
* @name_acquired_closure: (allow-none): #GClosure to invoke when @name is
|
|
* acquired or %NULL.
|
|
* @name_lost_closure: (allow-none): #GClosure to invoke when @name is lost or
|
|
* %NULL.
|
|
*
|
|
* Version of g_bus_own_name() using closures instead of callbacks for
|
|
* easier binding in other languages.
|
|
*
|
|
* Returns: An identifier (never 0) that an be used with
|
|
* g_bus_unown_name() to stop owning the name.
|
|
*
|
|
* Rename to: g_bus_own_name
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
guint
|
|
g_bus_own_name_with_closures (GBusType bus_type,
|
|
const gchar *name,
|
|
GBusNameOwnerFlags flags,
|
|
GClosure *bus_acquired_closure,
|
|
GClosure *name_acquired_closure,
|
|
GClosure *name_lost_closure)
|
|
{
|
|
return g_bus_own_name (bus_type,
|
|
name,
|
|
flags,
|
|
bus_acquired_closure != NULL ? own_with_closures_on_bus_acquired : NULL,
|
|
name_acquired_closure != NULL ? own_with_closures_on_name_acquired : NULL,
|
|
name_lost_closure != NULL ? own_with_closures_on_name_lost : NULL,
|
|
own_name_data_new (bus_acquired_closure,
|
|
name_acquired_closure,
|
|
name_lost_closure),
|
|
bus_own_name_free_func);
|
|
}
|
|
|
|
/**
|
|
* g_bus_own_name_on_connection_with_closures:
|
|
* @connection: A #GDBusConnection.
|
|
* @name: The well-known name to own.
|
|
* @flags: A set of flags from the #GBusNameOwnerFlags enumeration.
|
|
* @name_acquired_closure: (allow-none): #GClosure to invoke when @name is
|
|
* acquired or %NULL.
|
|
* @name_lost_closure: (allow-none): #GClosure to invoke when @name is lost or
|
|
* %NULL.
|
|
*
|
|
* Version of g_bus_own_name_on_connection() using closures instead of callbacks for
|
|
* easier binding in other languages.
|
|
*
|
|
* Returns: An identifier (never 0) that an be used with
|
|
* g_bus_unown_name() to stop owning the name.
|
|
*
|
|
* Rename to: g_bus_own_name_on_connection
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
guint
|
|
g_bus_own_name_on_connection_with_closures (GDBusConnection *connection,
|
|
const gchar *name,
|
|
GBusNameOwnerFlags flags,
|
|
GClosure *name_acquired_closure,
|
|
GClosure *name_lost_closure)
|
|
{
|
|
return g_bus_own_name_on_connection (connection,
|
|
name,
|
|
flags,
|
|
name_acquired_closure != NULL ? own_with_closures_on_name_acquired : NULL,
|
|
name_lost_closure != NULL ? own_with_closures_on_name_lost : NULL,
|
|
own_name_data_new (NULL,
|
|
name_acquired_closure,
|
|
name_lost_closure),
|
|
bus_own_name_free_func);
|
|
}
|
|
|
|
/**
|
|
* g_bus_unown_name:
|
|
* @owner_id: An identifier obtained from g_bus_own_name()
|
|
*
|
|
* Stops owning a name.
|
|
*
|
|
* Since: 2.26
|
|
*/
|
|
void
|
|
g_bus_unown_name (guint owner_id)
|
|
{
|
|
Client *client;
|
|
|
|
g_return_if_fail (owner_id > 0);
|
|
|
|
client = NULL;
|
|
|
|
G_LOCK (lock);
|
|
if (owner_id == 0 || map_id_to_client == NULL ||
|
|
(client = g_hash_table_lookup (map_id_to_client, GUINT_TO_POINTER (owner_id))) == NULL)
|
|
{
|
|
g_warning ("Invalid id %d passed to g_bus_unown_name()", owner_id);
|
|
goto out;
|
|
}
|
|
|
|
client->cancelled = TRUE;
|
|
g_warn_if_fail (g_hash_table_remove (map_id_to_client, GUINT_TO_POINTER (owner_id)));
|
|
|
|
out:
|
|
G_UNLOCK (lock);
|
|
|
|
/* do callback without holding lock */
|
|
if (client != NULL)
|
|
{
|
|
/* Release the name if needed */
|
|
if (client->needs_release && client->connection != NULL)
|
|
{
|
|
GVariant *result;
|
|
GError *error;
|
|
guint32 release_name_reply;
|
|
|
|
/* TODO: it kinda sucks having to do a sync call to release the name - but if
|
|
* we don't, then a subsequent grab of the name will make the bus daemon return
|
|
* IN_QUEUE which will trigger name_lost().
|
|
*
|
|
* I believe this is a bug in the bus daemon.
|
|
*/
|
|
error = NULL;
|
|
result = g_dbus_connection_call_sync (client->connection,
|
|
"org.freedesktop.DBus", /* bus name */
|
|
"/org/freedesktop/DBus", /* object path */
|
|
"org.freedesktop.DBus", /* interface name */
|
|
"ReleaseName", /* method name */
|
|
g_variant_new ("(s)", client->name),
|
|
G_VARIANT_TYPE ("(u)"),
|
|
G_DBUS_CALL_FLAGS_NONE,
|
|
-1,
|
|
NULL,
|
|
&error);
|
|
if (result == NULL)
|
|
{
|
|
g_warning ("Error releasing name %s: %s", client->name, error->message);
|
|
g_error_free (error);
|
|
}
|
|
else
|
|
{
|
|
g_variant_get (result, "(u)", &release_name_reply);
|
|
if (release_name_reply != 1 /* DBUS_RELEASE_NAME_REPLY_RELEASED */)
|
|
{
|
|
g_warning ("Unexpected reply %d when releasing name %s", release_name_reply, client->name);
|
|
}
|
|
g_variant_unref (result);
|
|
}
|
|
}
|
|
|
|
if (client->disconnected_signal_handler_id > 0)
|
|
g_signal_handler_disconnect (client->connection, client->disconnected_signal_handler_id);
|
|
if (client->name_acquired_subscription_id > 0)
|
|
g_dbus_connection_signal_unsubscribe (client->connection, client->name_acquired_subscription_id);
|
|
if (client->name_lost_subscription_id > 0)
|
|
g_dbus_connection_signal_unsubscribe (client->connection, client->name_lost_subscription_id);
|
|
client->disconnected_signal_handler_id = 0;
|
|
client->name_acquired_subscription_id = 0;
|
|
client->name_lost_subscription_id = 0;
|
|
if (client->connection != NULL)
|
|
{
|
|
g_object_unref (client->connection);
|
|
client->connection = NULL;
|
|
}
|
|
|
|
client_unref (client);
|
|
}
|
|
}
|