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glib/gio/gdbusobjectmanagerclient.c
Simon McVittie 7c609f8142 gdbus: Use symbolic constants for interfaces from dbus-specification 
Most D-Bus interfaces are domain-specific, but these interfaces from the
D-Bus Specification are intended to be commonly used in any context for
which they are found to be appropriate.

Most of these use `gdbusprivate.h`. One exception is that
`gio/tests/gdbus-example-*` redefine the constants locally: due to these
files' dual role as part of the unit tests and as sample code, it seems
desirable to ensure that they can still be compiled outside GLib.

Signed-off-by: Simon McVittie <smcv@collabora.com>
2024-05-16 22:52:23 +01:00

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/* GDBus - GLib D-Bus Library
*
* Copyright (C) 2008-2010 Red Hat, Inc.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: David Zeuthen <davidz@redhat.com>
*/
#include "config.h"
#include "gcancellable.h"
#include "gdbusobjectmanager.h"
#include "gdbusobjectmanagerclient.h"
#include "gdbusobject.h"
#include "gdbusprivate.h"
#include "gioenumtypes.h"
#include "gioerror.h"
#include "ginitable.h"
#include "gasyncresult.h"
#include "gasyncinitable.h"
#include "gdbusconnection.h"
#include "gdbusutils.h"
#include "gdbusobject.h"
#include "gdbusobjectproxy.h"
#include "gdbusproxy.h"
#include "gdbusinterface.h"
#include "glibintl.h"
#include "gmarshal-internal.h"
/**
* GDBusObjectManagerClient:
*
* `GDBusObjectManagerClient` is used to create, monitor and delete object
* proxies for remote objects exported by a [class@Gio.DBusObjectManagerServer]
* (or any code implementing the
* [org.freedesktop.DBus.ObjectManager](http://dbus.freedesktop.org/doc/dbus-specification.html#standard-interfaces-objectmanager)
* interface).
*
* Once an instance of this type has been created, you can connect to
* the [signal@Gio.DBusObjectManager::object-added] and
* [signal@Gio.DBusObjectManager::object-removed signals] and inspect the
* [class@Gio.DBusObjectProxy] objects returned by
* [method@Gio.DBusObjectManager.get_objects].
*
* If the name for a `GDBusObjectManagerClient` is not owned by anyone at
* object construction time, the default behavior is to request the
* message bus to launch an owner for the name. This behavior can be
* disabled using the `G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_DO_NOT_AUTO_START`
* flag. It’s also worth noting that this only works if the name of
* interest is activatable in the first place. E.g. in some cases it
* is not possible to launch an owner for the requested name. In this
* case, `GDBusObjectManagerClient` object construction still succeeds but
* there will be no object proxies
* (e.g. [method@Gio.DBusObjectManager.get_objects] returns the empty list) and
* the [property@Gio.DBusObjectManagerClient:name-owner] property is `NULL`.
*
* The owner of the requested name can come and go (for example
* consider a system service being restarted) – `GDBusObjectManagerClient`
* handles this case too; simply connect to the [signal@GObject.Object::notify]
* signal to watch for changes on the
* [property@Gio.DBusObjectManagerClient:name-owner] property. When the name
* owner vanishes, the behavior is that
* [property@Gio.DBusObjectManagerClient:name-owner] is set to `NULL` (this
* includes emission of the [signal@GObject.Object::notify] signal) and then
* [signal@Gio.DBusObjectManager::object-removed] signals are synthesized
* for all currently existing object proxies. Since
* [property@Gio.DBusObjectManagerClient:name-owner] is `NULL` when this
* happens, you can use this information to disambiguate a synthesized signal
* from a genuine signal caused by object removal on the remote
* [iface@Gio.DBusObjectManager]. Similarly, when a new name owner appears,
* [signal@Gio.DBusObjectManager::object-added] signals are synthesized
* while [property@Gio.DBusObjectManagerClient:name-owner] is still `NULL`. Only
* when all object proxies have been added, the
* [property@Gio.DBusObjectManagerClient:name-owner] is set to the new name
* owner (this includes emission of the [signal@GObject.Object::notify] signal).
* Furthermore, you are guaranteed that
* [property@Gio.DBusObjectManagerClient:name-owner] will alternate between a
* name owner (e.g. `:1.42`) and `NULL` even in the case where
* the name of interest is atomically replaced
*
* Ultimately, `GDBusObjectManagerClient` is used to obtain
* [class@Gio.DBusProxy] instances. All signals (including the
* `org.freedesktop.DBus.Properties::PropertiesChanged` signal)
* delivered to [class@Gio.DBusProxy] instances are guaranteed to originate
* from the name owner. This guarantee along with the behavior
* described above, means that certain race conditions including the
* “half the proxy is from the old owner and the other half is from
* the new owner” problem cannot happen.
*
* To avoid having the application connect to signals on the returned
* [class@Gio.DBusObjectProxy] and [class@Gio.DBusProxy] objects, the
* [signal@Gio.DBusObject::interface-added],
* [signal@Gio.DBusObject::interface-removed],
* [signal@Gio.DBusProxy::g-properties-changed] and
* [signal@Gio.DBusProxy::g-signal] signals
* are also emitted on the `GDBusObjectManagerClient` instance managing these
* objects. The signals emitted are
* [signal@Gio.DBusObjectManager::interface-added],
* [signal@Gio.DBusObjectManager::interface-removed],
* [signal@Gio.DBusObjectManagerClient::interface-proxy-properties-changed] and
* [signal@Gio.DBusObjectManagerClient::interface-proxy-signal].
*
* Note that all callbacks and signals are emitted in the
* thread-default main context (see
* [method@GLib.MainContext.push_thread_default]) that the
* `GDBusObjectManagerClient` object was constructed in. Additionally, the
* [class@Gio.DBusObjectProxy] and [class@Gio.DBusProxy] objects
* originating from the `GDBusObjectManagerClient` object will be created in
* the same context and, consequently, will deliver signals in the
* same main loop.
*
* Since: 2.30
*/
struct _GDBusObjectManagerClientPrivate
{
GMutex lock;
GBusType bus_type;
GDBusConnection *connection;
gchar *object_path;
gchar *name;
gchar *name_owner;
GDBusObjectManagerClientFlags flags;
GDBusProxy *control_proxy;
GHashTable *map_object_path_to_object_proxy;
guint signal_subscription_id;
gchar *match_rule;
GDBusProxyTypeFunc get_proxy_type_func;
gpointer get_proxy_type_user_data;
GDestroyNotify get_proxy_type_destroy_notify;
gulong name_owner_signal_id;
gulong signal_signal_id;
GCancellable *cancel;
};
enum
{
PROP_0,
PROP_BUS_TYPE,
PROP_CONNECTION,
PROP_FLAGS,
PROP_OBJECT_PATH,
PROP_NAME,
PROP_NAME_OWNER,
PROP_GET_PROXY_TYPE_FUNC,
PROP_GET_PROXY_TYPE_USER_DATA,
PROP_GET_PROXY_TYPE_DESTROY_NOTIFY
};
enum
{
INTERFACE_PROXY_SIGNAL_SIGNAL,
INTERFACE_PROXY_PROPERTIES_CHANGED_SIGNAL,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0 };
static void initable_iface_init (GInitableIface *initable_iface);
static void async_initable_iface_init (GAsyncInitableIface *async_initable_iface);
static void dbus_object_manager_interface_init (GDBusObjectManagerIface *iface);
G_DEFINE_TYPE_WITH_CODE (GDBusObjectManagerClient, g_dbus_object_manager_client, G_TYPE_OBJECT,
G_ADD_PRIVATE (GDBusObjectManagerClient)
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init)
G_IMPLEMENT_INTERFACE (G_TYPE_ASYNC_INITABLE, async_initable_iface_init)
G_IMPLEMENT_INTERFACE (G_TYPE_DBUS_OBJECT_MANAGER, dbus_object_manager_interface_init))
static void maybe_unsubscribe_signals (GDBusObjectManagerClient *manager);
static void on_control_proxy_g_signal (GDBusProxy *proxy,
const gchar *sender_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data);
static void process_get_all_result (GDBusObjectManagerClient *manager,
GVariant *value,
const gchar *name_owner);
static void
g_dbus_object_manager_client_dispose (GObject *object)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (object);
if (manager->priv->cancel != NULL)
{
g_cancellable_cancel (manager->priv->cancel);
g_clear_object (&manager->priv->cancel);
}
G_OBJECT_CLASS (g_dbus_object_manager_client_parent_class)->dispose (object);
}
static void
g_dbus_object_manager_client_finalize (GObject *object)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (object);
maybe_unsubscribe_signals (manager);
g_hash_table_unref (manager->priv->map_object_path_to_object_proxy);
if (manager->priv->control_proxy != NULL && manager->priv->signal_signal_id != 0)
g_signal_handler_disconnect (manager->priv->control_proxy,
manager->priv->signal_signal_id);
manager->priv->signal_signal_id = 0;
if (manager->priv->control_proxy != NULL && manager->priv->name_owner_signal_id != 0)
g_signal_handler_disconnect (manager->priv->control_proxy,
manager->priv->name_owner_signal_id);
manager->priv->name_owner_signal_id = 0;
g_clear_object (&manager->priv->control_proxy);
if (manager->priv->connection != NULL)
g_object_unref (manager->priv->connection);
g_free (manager->priv->object_path);
g_free (manager->priv->name);
g_free (manager->priv->name_owner);
if (manager->priv->get_proxy_type_destroy_notify != NULL)
manager->priv->get_proxy_type_destroy_notify (manager->priv->get_proxy_type_user_data);
g_mutex_clear (&manager->priv->lock);
if (G_OBJECT_CLASS (g_dbus_object_manager_client_parent_class)->finalize != NULL)
G_OBJECT_CLASS (g_dbus_object_manager_client_parent_class)->finalize (object);
}
static void
g_dbus_object_manager_client_get_property (GObject *_object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (_object);
switch (prop_id)
{
case PROP_CONNECTION:
g_value_set_object (value, g_dbus_object_manager_client_get_connection (manager));
break;
case PROP_OBJECT_PATH:
g_value_set_string (value, g_dbus_object_manager_get_object_path (G_DBUS_OBJECT_MANAGER (manager)));
break;
case PROP_NAME:
g_value_set_string (value, g_dbus_object_manager_client_get_name (manager));
break;
case PROP_FLAGS:
g_value_set_flags (value, g_dbus_object_manager_client_get_flags (manager));
break;
case PROP_NAME_OWNER:
g_value_take_string (value, g_dbus_object_manager_client_get_name_owner (manager));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (manager, prop_id, pspec);
break;
}
}
static void
g_dbus_object_manager_client_set_property (GObject *_object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (_object);
const gchar *name;
switch (prop_id)
{
case PROP_BUS_TYPE:
manager->priv->bus_type = g_value_get_enum (value);
break;
case PROP_CONNECTION:
if (g_value_get_object (value) != NULL)
{
g_assert (manager->priv->connection == NULL);
g_assert (G_IS_DBUS_CONNECTION (g_value_get_object (value)));
manager->priv->connection = g_value_dup_object (value);
}
break;
case PROP_OBJECT_PATH:
g_assert (manager->priv->object_path == NULL);
g_assert (g_variant_is_object_path (g_value_get_string (value)));
manager->priv->object_path = g_value_dup_string (value);
break;
case PROP_NAME:
g_assert (manager->priv->name == NULL);
name = g_value_get_string (value);
g_assert (name == NULL || g_dbus_is_name (name));
manager->priv->name = g_strdup (name);
break;
case PROP_FLAGS:
manager->priv->flags = g_value_get_flags (value);
break;
case PROP_GET_PROXY_TYPE_FUNC:
manager->priv->get_proxy_type_func = g_value_get_pointer (value);
break;
case PROP_GET_PROXY_TYPE_USER_DATA:
manager->priv->get_proxy_type_user_data = g_value_get_pointer (value);
break;
case PROP_GET_PROXY_TYPE_DESTROY_NOTIFY:
manager->priv->get_proxy_type_destroy_notify = g_value_get_pointer (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (manager, prop_id, pspec);
break;
}
}
static void
g_dbus_object_manager_client_class_init (GDBusObjectManagerClientClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose = g_dbus_object_manager_client_dispose;
gobject_class->finalize = g_dbus_object_manager_client_finalize;
gobject_class->set_property = g_dbus_object_manager_client_set_property;
gobject_class->get_property = g_dbus_object_manager_client_get_property;
/**
* GDBusObjectManagerClient:connection:
*
* The #GDBusConnection to use.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_CONNECTION,
g_param_spec_object ("connection", NULL, NULL,
G_TYPE_DBUS_CONNECTION,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GDBusObjectManagerClient:bus-type:
*
* If this property is not %G_BUS_TYPE_NONE, then
* #GDBusObjectManagerClient:connection must be %NULL and will be set to the
* #GDBusConnection obtained by calling g_bus_get() with the value
* of this property.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_BUS_TYPE,
g_param_spec_enum ("bus-type", NULL, NULL,
G_TYPE_BUS_TYPE,
G_BUS_TYPE_NONE,
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusObjectManagerClient:flags:
*
* Flags from the #GDBusObjectManagerClientFlags enumeration.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_FLAGS,
g_param_spec_flags ("flags", NULL, NULL,
G_TYPE_DBUS_OBJECT_MANAGER_CLIENT_FLAGS,
G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_NONE,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusObjectManagerClient:object-path:
*
* The object path the manager is for.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_OBJECT_PATH,
g_param_spec_string ("object-path", NULL, NULL,
NULL,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GDBusObjectManagerClient:name:
*
* The well-known name or unique name that the manager is for.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_NAME,
g_param_spec_string ("name", NULL, NULL,
NULL,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GDBusObjectManagerClient:name-owner:
*
* The unique name that owns #GDBusObjectManagerClient:name or %NULL if
* no-one is currently owning the name. Connect to the
* #GObject::notify signal to track changes to this property.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_NAME_OWNER,
g_param_spec_string ("name-owner", NULL, NULL,
NULL,
G_PARAM_READABLE |
G_PARAM_STATIC_STRINGS));
/**
* GDBusObjectManagerClient:get-proxy-type-func:
*
* The #GDBusProxyTypeFunc to use when determining what #GType to
* use for interface proxies or %NULL.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_GET_PROXY_TYPE_FUNC,
g_param_spec_pointer ("get-proxy-type-func", NULL, NULL,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GDBusObjectManagerClient:get-proxy-type-user-data:
*
* The #gpointer user_data to pass to #GDBusObjectManagerClient:get-proxy-type-func.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_GET_PROXY_TYPE_USER_DATA,
g_param_spec_pointer ("get-proxy-type-user-data", NULL, NULL,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GDBusObjectManagerClient:get-proxy-type-destroy-notify:
*
* A #GDestroyNotify for the #gpointer user_data in #GDBusObjectManagerClient:get-proxy-type-user-data.
*
* Since: 2.30
*/
g_object_class_install_property (gobject_class,
PROP_GET_PROXY_TYPE_DESTROY_NOTIFY,
g_param_spec_pointer ("get-proxy-type-destroy-notify", NULL, NULL,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_STRINGS));
/**
* GDBusObjectManagerClient::interface-proxy-signal:
* @manager: The #GDBusObjectManagerClient emitting the signal.
* @object_proxy: The #GDBusObjectProxy on which an interface is emitting a D-Bus signal.
* @interface_proxy: The #GDBusProxy that is emitting a D-Bus signal.
* @sender_name: The sender of the signal or NULL if the connection is not a bus connection.
* @signal_name: The signal name.
* @parameters: A #GVariant tuple with parameters for the signal.
*
* Emitted when a D-Bus signal is received on @interface_proxy.
*
* This signal exists purely as a convenience to avoid having to
* connect signals to all interface proxies managed by @manager.
*
* This signal is emitted in the
* [thread-default main context][g-main-context-push-thread-default]
* that @manager was constructed in.
*
* Since: 2.30
*/
signals[INTERFACE_PROXY_SIGNAL_SIGNAL] =
g_signal_new (I_("interface-proxy-signal"),
G_TYPE_DBUS_OBJECT_MANAGER_CLIENT,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDBusObjectManagerClientClass, interface_proxy_signal),
NULL,
NULL,
_g_cclosure_marshal_VOID__OBJECT_OBJECT_STRING_STRING_VARIANT,
G_TYPE_NONE,
5,
G_TYPE_DBUS_OBJECT_PROXY,
G_TYPE_DBUS_PROXY,
G_TYPE_STRING,
G_TYPE_STRING,
G_TYPE_VARIANT);
g_signal_set_va_marshaller (signals[INTERFACE_PROXY_SIGNAL_SIGNAL],
G_TYPE_FROM_CLASS (klass),
_g_cclosure_marshal_VOID__OBJECT_OBJECT_STRING_STRING_VARIANTv);
/**
* GDBusObjectManagerClient::interface-proxy-properties-changed:
* @manager: The #GDBusObjectManagerClient emitting the signal.
* @object_proxy: The #GDBusObjectProxy on which an interface has properties that are changing.
* @interface_proxy: The #GDBusProxy that has properties that are changing.
* @changed_properties: A #GVariant containing the properties that changed (type: `a{sv}`).
* @invalidated_properties: (array zero-terminated=1) (element-type utf8): A %NULL terminated
* array of properties that were invalidated.
*
* Emitted when one or more D-Bus properties on proxy changes. The
* local cache has already been updated when this signal fires. Note
* that both @changed_properties and @invalidated_properties are
* guaranteed to never be %NULL (either may be empty though).
*
* This signal exists purely as a convenience to avoid having to
* connect signals to all interface proxies managed by @manager.
*
* This signal is emitted in the
* [thread-default main context][g-main-context-push-thread-default]
* that @manager was constructed in.
*
* Since: 2.30
*/
signals[INTERFACE_PROXY_PROPERTIES_CHANGED_SIGNAL] =
g_signal_new (I_("interface-proxy-properties-changed"),
G_TYPE_DBUS_OBJECT_MANAGER_CLIENT,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDBusObjectManagerClientClass, interface_proxy_properties_changed),
NULL,
NULL,
_g_cclosure_marshal_VOID__OBJECT_OBJECT_VARIANT_BOXED,
G_TYPE_NONE,
4,
G_TYPE_DBUS_OBJECT_PROXY,
G_TYPE_DBUS_PROXY,
G_TYPE_VARIANT,
G_TYPE_STRV);
g_signal_set_va_marshaller (signals[INTERFACE_PROXY_PROPERTIES_CHANGED_SIGNAL],
G_TYPE_FROM_CLASS (klass),
_g_cclosure_marshal_VOID__OBJECT_OBJECT_VARIANT_BOXEDv);
}
static void
g_dbus_object_manager_client_init (GDBusObjectManagerClient *manager)
{
manager->priv = g_dbus_object_manager_client_get_instance_private (manager);
g_mutex_init (&manager->priv->lock);
manager->priv->map_object_path_to_object_proxy = g_hash_table_new_full (g_str_hash,
g_str_equal,
g_free,
(GDestroyNotify) g_object_unref);
manager->priv->cancel = g_cancellable_new ();
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_object_manager_client_new_sync:
* @connection: A #GDBusConnection.
* @flags: Zero or more flags from the #GDBusObjectManagerClientFlags enumeration.
* @name: (nullable): The owner of the control object (unique or well-known name), or %NULL when not using a message bus connection.
* @object_path: The object path of the control object.
* @get_proxy_type_func: (nullable): A #GDBusProxyTypeFunc function or %NULL to always construct #GDBusProxy proxies.
* @get_proxy_type_user_data: User data to pass to @get_proxy_type_func.
* @get_proxy_type_destroy_notify: (nullable): Free function for @get_proxy_type_user_data or %NULL.
* @cancellable: (nullable): A #GCancellable or %NULL
* @error: Return location for error or %NULL.
*
* Creates a new #GDBusObjectManagerClient object.
*
* This is a synchronous failable constructor - the calling thread is
* blocked until a reply is received. See g_dbus_object_manager_client_new()
* for the asynchronous version.
*
* Returns: (transfer full) (type GDBusObjectManagerClient): A
* #GDBusObjectManagerClient object or %NULL if @error is set. Free
* with g_object_unref().
*
* Since: 2.30
*/
GDBusObjectManager *
g_dbus_object_manager_client_new_sync (GDBusConnection *connection,
GDBusObjectManagerClientFlags flags,
const gchar *name,
const gchar *object_path,
GDBusProxyTypeFunc get_proxy_type_func,
gpointer get_proxy_type_user_data,
GDestroyNotify get_proxy_type_destroy_notify,
GCancellable *cancellable,
GError **error)
{
GInitable *initable;
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
g_return_val_if_fail ((name == NULL && g_dbus_connection_get_unique_name (connection) == NULL) ||
g_dbus_is_name (name), NULL);
g_return_val_if_fail (g_variant_is_object_path (object_path), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
initable = g_initable_new (G_TYPE_DBUS_OBJECT_MANAGER_CLIENT,
cancellable,
error,
"connection", connection,
"flags", flags,
"name", name,
"object-path", object_path,
"get-proxy-type-func", get_proxy_type_func,
"get-proxy-type-user-data", get_proxy_type_user_data,
"get-proxy-type-destroy-notify", get_proxy_type_destroy_notify,
NULL);
if (initable != NULL)
return G_DBUS_OBJECT_MANAGER (initable);
else
return NULL;
}
/**
* g_dbus_object_manager_client_new:
* @connection: A #GDBusConnection.
* @flags: Zero or more flags from the #GDBusObjectManagerClientFlags enumeration.
* @name: The owner of the control object (unique or well-known name).
* @object_path: The object path of the control object.
* @get_proxy_type_func: (nullable): A #GDBusProxyTypeFunc function or %NULL to always construct #GDBusProxy proxies.
* @get_proxy_type_user_data: User data to pass to @get_proxy_type_func.
* @get_proxy_type_destroy_notify: (nullable): Free function for @get_proxy_type_user_data or %NULL.
* @cancellable: (nullable): A #GCancellable or %NULL
* @callback: A #GAsyncReadyCallback to call when the request is satisfied.
* @user_data: The data to pass to @callback.
*
* Asynchronously creates a new #GDBusObjectManagerClient object.
*
* This is an asynchronous failable constructor. When the result is
* ready, @callback will be invoked in the
* [thread-default main context][g-main-context-push-thread-default]
* of the thread you are calling this method from. You can
* then call g_dbus_object_manager_client_new_finish() to get the result. See
* g_dbus_object_manager_client_new_sync() for the synchronous version.
*
* Since: 2.30
*/
void
g_dbus_object_manager_client_new (GDBusConnection *connection,
GDBusObjectManagerClientFlags flags,
const gchar *name,
const gchar *object_path,
GDBusProxyTypeFunc get_proxy_type_func,
gpointer get_proxy_type_user_data,
GDestroyNotify get_proxy_type_destroy_notify,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
g_return_if_fail ((name == NULL && g_dbus_connection_get_unique_name (connection) == NULL) ||
g_dbus_is_name (name));
g_return_if_fail (g_variant_is_object_path (object_path));
g_async_initable_new_async (G_TYPE_DBUS_OBJECT_MANAGER_CLIENT,
G_PRIORITY_DEFAULT,
cancellable,
callback,
user_data,
"connection", connection,
"flags", flags,
"name", name,
"object-path", object_path,
"get-proxy-type-func", get_proxy_type_func,
"get-proxy-type-user-data", get_proxy_type_user_data,
"get-proxy-type-destroy-notify", get_proxy_type_destroy_notify,
NULL);
}
/**
* g_dbus_object_manager_client_new_finish:
* @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_object_manager_client_new().
* @error: Return location for error or %NULL.
*
* Finishes an operation started with g_dbus_object_manager_client_new().
*
* Returns: (transfer full) (type GDBusObjectManagerClient): A
* #GDBusObjectManagerClient object or %NULL if @error is set. Free
* with g_object_unref().
*
* Since: 2.30
*/
GDBusObjectManager *
g_dbus_object_manager_client_new_finish (GAsyncResult *res,
GError **error)
{
GObject *object;
GObject *source_object;
source_object = g_async_result_get_source_object (res);
g_assert (source_object != NULL);
object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object),
res,
error);
g_object_unref (source_object);
if (object != NULL)
return G_DBUS_OBJECT_MANAGER (object);
else
return NULL;
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_object_manager_client_new_for_bus_sync:
* @bus_type: A #GBusType.
* @flags: Zero or more flags from the #GDBusObjectManagerClientFlags enumeration.
* @name: The owner of the control object (unique or well-known name).
* @object_path: The object path of the control object.
* @get_proxy_type_func: (nullable): A #GDBusProxyTypeFunc function or %NULL to always construct #GDBusProxy proxies.
* @get_proxy_type_user_data: User data to pass to @get_proxy_type_func.
* @get_proxy_type_destroy_notify: (nullable): Free function for @get_proxy_type_user_data or %NULL.
* @cancellable: (nullable): A #GCancellable or %NULL
* @error: Return location for error or %NULL.
*
* Like g_dbus_object_manager_client_new_sync() but takes a #GBusType instead
* of a #GDBusConnection.
*
* This is a synchronous failable constructor - the calling thread is
* blocked until a reply is received. See g_dbus_object_manager_client_new_for_bus()
* for the asynchronous version.
*
* Returns: (transfer full) (type GDBusObjectManagerClient): A
* #GDBusObjectManagerClient object or %NULL if @error is set. Free
* with g_object_unref().
*
* Since: 2.30
*/
GDBusObjectManager *
g_dbus_object_manager_client_new_for_bus_sync (GBusType bus_type,
GDBusObjectManagerClientFlags flags,
const gchar *name,
const gchar *object_path,
GDBusProxyTypeFunc get_proxy_type_func,
gpointer get_proxy_type_user_data,
GDestroyNotify get_proxy_type_destroy_notify,
GCancellable *cancellable,
GError **error)
{
GInitable *initable;
g_return_val_if_fail (bus_type != G_BUS_TYPE_NONE, NULL);
g_return_val_if_fail (g_dbus_is_name (name), NULL);
g_return_val_if_fail (g_variant_is_object_path (object_path), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
initable = g_initable_new (G_TYPE_DBUS_OBJECT_MANAGER_CLIENT,
cancellable,
error,
"bus-type", bus_type,
"flags", flags,
"name", name,
"object-path", object_path,
"get-proxy-type-func", get_proxy_type_func,
"get-proxy-type-user-data", get_proxy_type_user_data,
"get-proxy-type-destroy-notify", get_proxy_type_destroy_notify,
NULL);
if (initable != NULL)
return G_DBUS_OBJECT_MANAGER (initable);
else
return NULL;
}
/**
* g_dbus_object_manager_client_new_for_bus:
* @bus_type: A #GBusType.
* @flags: Zero or more flags from the #GDBusObjectManagerClientFlags enumeration.
* @name: The owner of the control object (unique or well-known name).
* @object_path: The object path of the control object.
* @get_proxy_type_func: (nullable): A #GDBusProxyTypeFunc function or %NULL to always construct #GDBusProxy proxies.
* @get_proxy_type_user_data: User data to pass to @get_proxy_type_func.
* @get_proxy_type_destroy_notify: (nullable): Free function for @get_proxy_type_user_data or %NULL.
* @cancellable: (nullable): A #GCancellable or %NULL
* @callback: A #GAsyncReadyCallback to call when the request is satisfied.
* @user_data: The data to pass to @callback.
*
* Like g_dbus_object_manager_client_new() but takes a #GBusType instead of a
* #GDBusConnection.
*
* This is an asynchronous failable constructor. When the result is
* ready, @callback will be invoked in the
* [thread-default main loop][g-main-context-push-thread-default]
* of the thread you are calling this method from. You can
* then call g_dbus_object_manager_client_new_for_bus_finish() to get the result. See
* g_dbus_object_manager_client_new_for_bus_sync() for the synchronous version.
*
* Since: 2.30
*/
void
g_dbus_object_manager_client_new_for_bus (GBusType bus_type,
GDBusObjectManagerClientFlags flags,
const gchar *name,
const gchar *object_path,
GDBusProxyTypeFunc get_proxy_type_func,
gpointer get_proxy_type_user_data,
GDestroyNotify get_proxy_type_destroy_notify,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_return_if_fail (bus_type != G_BUS_TYPE_NONE);
g_return_if_fail (g_dbus_is_name (name));
g_return_if_fail (g_variant_is_object_path (object_path));
g_async_initable_new_async (G_TYPE_DBUS_OBJECT_MANAGER_CLIENT,
G_PRIORITY_DEFAULT,
cancellable,
callback,
user_data,
"bus-type", bus_type,
"flags", flags,
"name", name,
"object-path", object_path,
"get-proxy-type-func", get_proxy_type_func,
"get-proxy-type-user-data", get_proxy_type_user_data,
"get-proxy-type-destroy-notify", get_proxy_type_destroy_notify,
NULL);
}
/**
* g_dbus_object_manager_client_new_for_bus_finish:
* @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_object_manager_client_new_for_bus().
* @error: Return location for error or %NULL.
*
* Finishes an operation started with g_dbus_object_manager_client_new_for_bus().
*
* Returns: (transfer full) (type GDBusObjectManagerClient): A
* #GDBusObjectManagerClient object or %NULL if @error is set. Free
* with g_object_unref().
*
* Since: 2.30
*/
GDBusObjectManager *
g_dbus_object_manager_client_new_for_bus_finish (GAsyncResult *res,
GError **error)
{
GObject *object;
GObject *source_object;
source_object = g_async_result_get_source_object (res);
g_assert (source_object != NULL);
object = g_async_initable_new_finish (G_ASYNC_INITABLE (source_object),
res,
error);
g_object_unref (source_object);
if (object != NULL)
return G_DBUS_OBJECT_MANAGER (object);
else
return NULL;
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_object_manager_client_get_connection:
* @manager: A #GDBusObjectManagerClient
*
* Gets the #GDBusConnection used by @manager.
*
* Returns: (transfer none): A #GDBusConnection object. Do not free,
* the object belongs to @manager.
*
* Since: 2.30
*/
GDBusConnection *
g_dbus_object_manager_client_get_connection (GDBusObjectManagerClient *manager)
{
GDBusConnection *ret;
g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_CLIENT (manager), NULL);
g_mutex_lock (&manager->priv->lock);
ret = manager->priv->connection;
g_mutex_unlock (&manager->priv->lock);
return ret;
}
/**
* g_dbus_object_manager_client_get_name:
* @manager: A #GDBusObjectManagerClient
*
* Gets the name that @manager is for, or %NULL if not a message bus
* connection.
*
* Returns: A unique or well-known name. Do not free, the string
* belongs to @manager.
*
* Since: 2.30
*/
const gchar *
g_dbus_object_manager_client_get_name (GDBusObjectManagerClient *manager)
{
const gchar *ret;
g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_CLIENT (manager), NULL);
g_mutex_lock (&manager->priv->lock);
ret = manager->priv->name;
g_mutex_unlock (&manager->priv->lock);
return ret;
}
/**
* g_dbus_object_manager_client_get_flags:
* @manager: A #GDBusObjectManagerClient
*
* Gets the flags that @manager was constructed with.
*
* Returns: Zero of more flags from the #GDBusObjectManagerClientFlags
* enumeration.
*
* Since: 2.30
*/
GDBusObjectManagerClientFlags
g_dbus_object_manager_client_get_flags (GDBusObjectManagerClient *manager)
{
GDBusObjectManagerClientFlags ret;
g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_CLIENT (manager), G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_NONE);
g_mutex_lock (&manager->priv->lock);
ret = manager->priv->flags;
g_mutex_unlock (&manager->priv->lock);
return ret;
}
/**
* g_dbus_object_manager_client_get_name_owner:
* @manager: A #GDBusObjectManagerClient.
*
* The unique name that owns the name that @manager is for or %NULL if
* no-one currently owns that name. You can connect to the
* #GObject::notify signal to track changes to the
* #GDBusObjectManagerClient:name-owner property.
*
* Returns: (nullable): The name owner or %NULL if no name owner
* exists. Free with g_free().
*
* Since: 2.30
*/
gchar *
g_dbus_object_manager_client_get_name_owner (GDBusObjectManagerClient *manager)
{
gchar *ret;
g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_CLIENT (manager), NULL);
g_mutex_lock (&manager->priv->lock);
ret = g_strdup (manager->priv->name_owner);
g_mutex_unlock (&manager->priv->lock);
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
/* signal handler for all objects we manage - we dispatch signals
* from here to the objects
*/
static void
signal_cb (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (user_data);
GDBusObjectProxy *object_proxy;
GDBusInterface *interface;
g_mutex_lock (&manager->priv->lock);
object_proxy = g_hash_table_lookup (manager->priv->map_object_path_to_object_proxy, object_path);
if (object_proxy == NULL)
{
g_mutex_unlock (&manager->priv->lock);
goto out;
}
g_object_ref (object_proxy);
g_mutex_unlock (&manager->priv->lock);
//g_debug ("yay, signal_cb %s %s: %s\n", signal_name, object_path, g_variant_print (parameters, TRUE));
g_object_ref (manager);
if (g_strcmp0 (interface_name, DBUS_INTERFACE_PROPERTIES) == 0)
{
if (g_strcmp0 (signal_name, "PropertiesChanged") == 0)
{
const gchar *properties_interface_name;
GVariant *changed_properties;
const gchar **invalidated_properties;
g_variant_get (parameters,
"(&s@a{sv}^a&s)",
&properties_interface_name,
&changed_properties,
&invalidated_properties);
interface = g_dbus_object_get_interface (G_DBUS_OBJECT (object_proxy), properties_interface_name);
if (interface != NULL)
{
GVariantIter property_iter;
const gchar *property_name;
GVariant *property_value;
guint n;
/* update caches... */
g_variant_iter_init (&property_iter, changed_properties);
while (g_variant_iter_next (&property_iter,
"{&sv}",
&property_name,
&property_value))
{
g_dbus_proxy_set_cached_property (G_DBUS_PROXY (interface),
property_name,
property_value);
g_variant_unref (property_value);
}
for (n = 0; invalidated_properties[n] != NULL; n++)
{
g_dbus_proxy_set_cached_property (G_DBUS_PROXY (interface),
invalidated_properties[n],
NULL);
}
/* ... and then synthesize the signal */
g_signal_emit_by_name (interface,
"g-properties-changed",
changed_properties,
invalidated_properties);
g_signal_emit (manager,
signals[INTERFACE_PROXY_PROPERTIES_CHANGED_SIGNAL],
0,
object_proxy,
interface,
changed_properties,
invalidated_properties);
g_object_unref (interface);
}
g_variant_unref (changed_properties);
g_free (invalidated_properties);
}
}
else
{
/* regular signal - just dispatch it */
interface = g_dbus_object_get_interface (G_DBUS_OBJECT (object_proxy), interface_name);
if (interface != NULL)
{
g_signal_emit_by_name (interface,
"g-signal",
sender_name,
signal_name,
parameters);
g_signal_emit (manager,
signals[INTERFACE_PROXY_SIGNAL_SIGNAL],
0,
object_proxy,
interface,
sender_name,
signal_name,
parameters);
g_object_unref (interface);
}
}
g_object_unref (manager);
out:
g_clear_object (&object_proxy);
}
static void
subscribe_signals (GDBusObjectManagerClient *manager,
const gchar *name_owner)
{
GError *error = NULL;
GVariant *ret;
g_return_if_fail (G_IS_DBUS_OBJECT_MANAGER_CLIENT (manager));
g_return_if_fail (manager->priv->signal_subscription_id == 0);
g_return_if_fail (name_owner == NULL || g_dbus_is_unique_name (name_owner));
if (name_owner != NULL)
{
/* Only add path_namespace if it's non-'/'. This removes a no-op key from
* the match rule, and also works around a D-Bus bug where
* path_namespace='/' matches nothing in D-Bus versions < 1.6.18.
*
* See: https://bugs.freedesktop.org/show_bug.cgi?id=70799 */
if (g_str_equal (manager->priv->object_path, "/"))
{
manager->priv->match_rule = g_strdup_printf ("type='signal',sender='%s'",
name_owner);
}
else
{
manager->priv->match_rule = g_strdup_printf ("type='signal',sender='%s',path_namespace='%s'",
name_owner, manager->priv->object_path);
}
/* The bus daemon may not implement path_namespace so gracefully
* handle this by using a fallback triggered if @error is set. */
ret = g_dbus_connection_call_sync (manager->priv->connection,
DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"AddMatch",
g_variant_new ("(s)",
manager->priv->match_rule),
NULL, /* reply_type */
G_DBUS_CALL_FLAGS_NONE,
-1, /* default timeout */
NULL, /* TODO: Cancellable */
&error);
/* yay, bus daemon supports path_namespace */
if (ret != NULL)
g_variant_unref (ret);
}
if (error == NULL)
{
/* still need to ask GDBusConnection for the callbacks */
manager->priv->signal_subscription_id =
g_dbus_connection_signal_subscribe (manager->priv->connection,
name_owner,
NULL, /* interface */
NULL, /* member */
NULL, /* path - TODO: really want wildcard support here */
NULL, /* arg0 */
G_DBUS_SIGNAL_FLAGS_NONE |
G_DBUS_SIGNAL_FLAGS_NO_MATCH_RULE,
signal_cb,
manager,
NULL); /* user_data_free_func */
}
else
{
/* TODO: we could report this to the user
g_warning ("Message bus daemon does not support path_namespace: %s (%s %d)",
error->message,
g_quark_to_string (error->domain),
error->code);
*/
g_error_free (error);
/* no need to call RemoveMatch when done since it didn't work */
g_free (manager->priv->match_rule);
manager->priv->match_rule = NULL;
/* Fallback is to subscribe to *all* signals from the name owner which
* is rather wasteful. It's probably not a big practical problem because
* users typically want all objects that the name owner supplies.
*/
manager->priv->signal_subscription_id =
g_dbus_connection_signal_subscribe (manager->priv->connection,
name_owner,
NULL, /* interface */
NULL, /* member */
NULL, /* path - TODO: really want wildcard support here */
NULL, /* arg0 */
G_DBUS_SIGNAL_FLAGS_NONE,
signal_cb,
manager,
NULL); /* user_data_free_func */
}
}
static void
maybe_unsubscribe_signals (GDBusObjectManagerClient *manager)
{
g_return_if_fail (G_IS_DBUS_OBJECT_MANAGER_CLIENT (manager));
if (manager->priv->signal_subscription_id > 0)
{
g_dbus_connection_signal_unsubscribe (manager->priv->connection,
manager->priv->signal_subscription_id);
manager->priv->signal_subscription_id = 0;
}
if (manager->priv->match_rule != NULL)
{
/* Since the AddMatch call succeeded this is guaranteed to not
* fail - therefore, don't bother checking the return value
*/
g_dbus_connection_call (manager->priv->connection,
DBUS_SERVICE_DBUS,
DBUS_PATH_DBUS,
DBUS_INTERFACE_DBUS,
"RemoveMatch",
g_variant_new ("(s)",
manager->priv->match_rule),
NULL, /* reply_type */
G_DBUS_CALL_FLAGS_NONE,
-1, /* default timeout */
NULL, /* GCancellable */
NULL, /* GAsyncReadyCallback */
NULL); /* user data */
g_free (manager->priv->match_rule);
manager->priv->match_rule = NULL;
}
}
/* ---------------------------------------------------------------------------------------------------- */
static GWeakRef *
weak_ref_new (GObject *object)
{
GWeakRef *weak_ref = g_new0 (GWeakRef, 1);
g_weak_ref_init (weak_ref, object);
return g_steal_pointer (&weak_ref);
}
static void
weak_ref_free (GWeakRef *weak_ref)
{
g_weak_ref_clear (weak_ref);
g_free (weak_ref);
}
static void
on_get_managed_objects_finish (GObject *source,
GAsyncResult *result,
gpointer user_data)
{
GDBusProxy *proxy = G_DBUS_PROXY (source);
GWeakRef *manager_weak = user_data;
GDBusObjectManagerClient *manager;
GError *error = NULL;
GVariant *value = NULL;
gchar *new_name_owner = NULL;
value = g_dbus_proxy_call_finish (proxy, result, &error);
manager = G_DBUS_OBJECT_MANAGER_CLIENT (g_weak_ref_get (manager_weak));
/* Manager got disposed, nothing to do */
if (manager == NULL)
{
goto out;
}
new_name_owner = g_dbus_proxy_get_name_owner (manager->priv->control_proxy);
if (value == NULL)
{
maybe_unsubscribe_signals (manager);
if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
{
g_warning ("Error calling GetManagedObjects() when name owner %s for name %s came back: %s",
new_name_owner,
manager->priv->name,
error->message);
}
}
else
{
process_get_all_result (manager, value, new_name_owner);
}
/* do the :name-owner notify *AFTER* emitting ::object-proxy-added signals - this
* way the user knows that the signals were emitted because the name owner came back
*/
g_mutex_lock (&manager->priv->lock);
manager->priv->name_owner = g_steal_pointer (&new_name_owner);
g_mutex_unlock (&manager->priv->lock);
g_object_notify (G_OBJECT (manager), "name-owner");
g_object_unref (manager);
out:
g_clear_error (&error);
g_clear_pointer (&value, g_variant_unref);
weak_ref_free (manager_weak);
}
static void
on_notify_g_name_owner (GObject *object,
GParamSpec *pspec,
gpointer user_data)
{
GWeakRef *manager_weak = user_data;
GDBusObjectManagerClient *manager = NULL;
gchar *old_name_owner;
gchar *new_name_owner;
manager = G_DBUS_OBJECT_MANAGER_CLIENT (g_weak_ref_get (manager_weak));
if (manager == NULL)
return;
g_mutex_lock (&manager->priv->lock);
old_name_owner = manager->priv->name_owner;
new_name_owner = g_dbus_proxy_get_name_owner (manager->priv->control_proxy);
manager->priv->name_owner = NULL;
if (g_strcmp0 (old_name_owner, new_name_owner) != 0)
{
GPtrArray *proxies;
/* remote manager changed; nuke all local proxies */
proxies = g_hash_table_steal_all_values (
manager->priv->map_object_path_to_object_proxy);
g_mutex_unlock (&manager->priv->lock);
/* do the :name-owner notify with a NULL name - this way the user knows
* the ::object-proxy-removed following is because the name owner went
* away
*/
g_object_notify (G_OBJECT (manager), "name-owner");
for (guint i = 0; i < proxies->len; ++i)
{
GDBusObjectProxy *object_proxy =
G_DBUS_OBJECT_PROXY (g_ptr_array_index (proxies, i));
g_signal_emit_by_name (manager, "object-removed", object_proxy);
}
g_clear_pointer (&proxies, g_ptr_array_unref);
/* nuke local filter */
maybe_unsubscribe_signals (manager);
}
else
{
g_mutex_unlock (&manager->priv->lock);
}
if (new_name_owner != NULL)
{
//g_debug ("repopulating for %s", new_name_owner);
subscribe_signals (manager,
new_name_owner);
g_dbus_proxy_call (manager->priv->control_proxy,
"GetManagedObjects",
NULL, /* parameters */
G_DBUS_CALL_FLAGS_NONE,
-1,
manager->priv->cancel,
on_get_managed_objects_finish,
weak_ref_new (G_OBJECT (manager)));
}
g_free (new_name_owner);
g_free (old_name_owner);
g_object_unref (manager);
}
static gboolean
initable_init (GInitable *initable,
GCancellable *cancellable,
GError **error)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (initable);
gboolean ret;
GVariant *value;
GDBusProxyFlags proxy_flags;
ret = FALSE;
if (manager->priv->bus_type != G_BUS_TYPE_NONE)
{
g_assert (manager->priv->connection == NULL);
manager->priv->connection = g_bus_get_sync (manager->priv->bus_type, cancellable, error);
if (manager->priv->connection == NULL)
goto out;
}
proxy_flags = G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES;
if (manager->priv->flags & G_DBUS_OBJECT_MANAGER_CLIENT_FLAGS_DO_NOT_AUTO_START)
proxy_flags |= G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START;
manager->priv->control_proxy = g_dbus_proxy_new_sync (manager->priv->connection,
proxy_flags,
NULL, /* GDBusInterfaceInfo* */
manager->priv->name,
manager->priv->object_path,
DBUS_INTERFACE_OBJECT_MANAGER,
cancellable,
error);
if (manager->priv->control_proxy == NULL)
goto out;
/* Use weak refs here. The @control_proxy will emit its signals in the current
* #GMainContext (since we constructed it just above). However, the user may
* drop the last external reference to this #GDBusObjectManagerClient in
* another thread between a signal being emitted and scheduled in an idle
* callback in this #GMainContext, and that idle callback being invoked. We
* can’t use a strong reference here, as there’s no
* g_dbus_object_manager_client_disconnect() (or similar) method to tell us
* when the last external reference to this object has been dropped, so we
* can’t break a strong reference count cycle. So use weak refs. */
manager->priv->name_owner_signal_id =
g_signal_connect_data (G_OBJECT (manager->priv->control_proxy),
"notify::g-name-owner",
G_CALLBACK (on_notify_g_name_owner),
weak_ref_new (G_OBJECT (manager)),
(GClosureNotify) weak_ref_free,
G_CONNECT_DEFAULT);
manager->priv->signal_signal_id =
g_signal_connect_data (manager->priv->control_proxy,
"g-signal",
G_CALLBACK (on_control_proxy_g_signal),
weak_ref_new (G_OBJECT (manager)),
(GClosureNotify) weak_ref_free,
G_CONNECT_DEFAULT);
manager->priv->name_owner = g_dbus_proxy_get_name_owner (manager->priv->control_proxy);
if (manager->priv->name_owner == NULL && manager->priv->name != NULL)
{
/* it's perfectly fine if there's no name owner.. we're just going to
* wait until one is ready
*/
}
else
{
/* yay, we can get the objects */
subscribe_signals (manager,
manager->priv->name_owner);
value = g_dbus_proxy_call_sync (manager->priv->control_proxy,
"GetManagedObjects",
NULL, /* parameters */
G_DBUS_CALL_FLAGS_NONE,
-1,
cancellable,
error);
if (value == NULL)
{
maybe_unsubscribe_signals (manager);
g_warn_if_fail (manager->priv->signal_signal_id != 0);
g_signal_handler_disconnect (manager->priv->control_proxy,
manager->priv->signal_signal_id);
manager->priv->signal_signal_id = 0;
g_warn_if_fail (manager->priv->name_owner_signal_id != 0);
g_signal_handler_disconnect (manager->priv->control_proxy,
manager->priv->name_owner_signal_id);
manager->priv->name_owner_signal_id = 0;
g_object_unref (manager->priv->control_proxy);
manager->priv->control_proxy = NULL;
goto out;
}
process_get_all_result (manager, value, manager->priv->name_owner);
g_variant_unref (value);
}
ret = TRUE;
out:
return ret;
}
static void
initable_iface_init (GInitableIface *initable_iface)
{
initable_iface->init = initable_init;
}
static void
async_initable_iface_init (GAsyncInitableIface *async_initable_iface)
{
/* for now, just use default: run GInitable code in thread */
}
/* ---------------------------------------------------------------------------------------------------- */
static void
add_interfaces (GDBusObjectManagerClient *manager,
const gchar *object_path,
GVariant *ifaces_and_properties,
const gchar *name_owner)
{
GDBusObjectProxy *op;
gboolean added;
GVariantIter iter;
const gchar *interface_name;
GVariant *properties;
GList *interface_added_signals, *l;
GDBusProxy *interface_proxy;
g_return_if_fail (name_owner == NULL || g_dbus_is_unique_name (name_owner));
g_mutex_lock (&manager->priv->lock);
interface_added_signals = NULL;
added = FALSE;
op = g_hash_table_lookup (manager->priv->map_object_path_to_object_proxy, object_path);
if (op == NULL)
{
GType object_proxy_type;
if (manager->priv->get_proxy_type_func != NULL)
{
object_proxy_type = manager->priv->get_proxy_type_func (manager,
object_path,
NULL,
manager->priv->get_proxy_type_user_data);
g_warn_if_fail (g_type_is_a (object_proxy_type, G_TYPE_DBUS_OBJECT_PROXY));
}
else
{
object_proxy_type = G_TYPE_DBUS_OBJECT_PROXY;
}
op = g_object_new (object_proxy_type,
"g-connection", manager->priv->connection,
"g-object-path", object_path,
NULL);
added = TRUE;
}
g_object_ref (op);
g_variant_iter_init (&iter, ifaces_and_properties);
while (g_variant_iter_next (&iter,
"{&s@a{sv}}",
&interface_name,
&properties))
{
GError *error;
GType interface_proxy_type;
if (manager->priv->get_proxy_type_func != NULL)
{
interface_proxy_type = manager->priv->get_proxy_type_func (manager,
object_path,
interface_name,
manager->priv->get_proxy_type_user_data);
g_warn_if_fail (g_type_is_a (interface_proxy_type, G_TYPE_DBUS_PROXY));
}
else
{
interface_proxy_type = G_TYPE_DBUS_PROXY;
}
/* this is fine - there is no blocking IO because we pass DO_NOT_LOAD_PROPERTIES and
* DO_NOT_CONNECT_SIGNALS and use a unique name
*/
error = NULL;
interface_proxy = g_initable_new (interface_proxy_type,
NULL, /* GCancellable */
&error,
"g-connection", manager->priv->connection,
"g-flags", G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES |
G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS,
"g-name", name_owner,
"g-object-path", object_path,
"g-interface-name", interface_name,
NULL);
if (interface_proxy == NULL)
{
g_warning ("%s: Error constructing proxy for path %s and interface %s: %s",
G_STRLOC,
object_path,
interface_name,
error->message);
g_error_free (error);
}
else
{
GVariantIter property_iter;
const gchar *property_name;
GVariant *property_value;
/* associate the interface proxy with the object */
g_dbus_interface_set_object (G_DBUS_INTERFACE (interface_proxy),
G_DBUS_OBJECT (op));
g_variant_iter_init (&property_iter, properties);
while (g_variant_iter_next (&property_iter,
"{&sv}",
&property_name,
&property_value))
{
g_dbus_proxy_set_cached_property (interface_proxy,
property_name,
property_value);
g_variant_unref (property_value);
}
_g_dbus_object_proxy_add_interface (op, interface_proxy);
if (!added)
interface_added_signals = g_list_append (interface_added_signals, g_object_ref (interface_proxy));
g_object_unref (interface_proxy);
}
g_variant_unref (properties);
}
if (added)
{
g_hash_table_insert (manager->priv->map_object_path_to_object_proxy,
g_strdup (object_path),
op);
}
g_mutex_unlock (&manager->priv->lock);
/* now that we don't hold the lock any more, emit signals */
g_object_ref (manager);
for (l = interface_added_signals; l != NULL; l = l->next)
{
interface_proxy = G_DBUS_PROXY (l->data);
g_signal_emit_by_name (manager, "interface-added", op, interface_proxy);
g_object_unref (interface_proxy);
}
g_list_free (interface_added_signals);
if (added)
g_signal_emit_by_name (manager, "object-added", op);
g_object_unref (manager);
g_object_unref (op);
}
static void
remove_interfaces (GDBusObjectManagerClient *manager,
const gchar *object_path,
const gchar *const *interface_names)
{
GDBusObjectProxy *op;
GList *interfaces;
guint n;
guint num_interfaces;
guint num_interfaces_to_remove;
g_mutex_lock (&manager->priv->lock);
op = g_hash_table_lookup (manager->priv->map_object_path_to_object_proxy, object_path);
if (op == NULL)
{
g_debug ("%s: Processing InterfaceRemoved signal for path %s but no object proxy exists",
G_STRLOC,
object_path);
g_mutex_unlock (&manager->priv->lock);
return;
}
interfaces = g_dbus_object_get_interfaces (G_DBUS_OBJECT (op));
num_interfaces = g_list_length (interfaces);
g_list_free_full (interfaces, g_object_unref);
num_interfaces_to_remove = g_strv_length ((gchar **) interface_names);
/* see if we are going to completety remove the object */
g_object_ref (manager);
if (num_interfaces_to_remove == num_interfaces)
{
g_object_ref (op);
g_warn_if_fail (g_hash_table_remove (manager->priv->map_object_path_to_object_proxy, object_path));
g_mutex_unlock (&manager->priv->lock);
g_signal_emit_by_name (manager, "object-removed", op);
g_object_unref (op);
}
else
{
g_object_ref (op);
g_mutex_unlock (&manager->priv->lock);
for (n = 0; interface_names != NULL && interface_names[n] != NULL; n++)
{
GDBusInterface *interface;
interface = g_dbus_object_get_interface (G_DBUS_OBJECT (op), interface_names[n]);
_g_dbus_object_proxy_remove_interface (op, interface_names[n]);
if (interface != NULL)
{
g_signal_emit_by_name (manager, "interface-removed", op, interface);
g_object_unref (interface);
}
}
g_object_unref (op);
}
g_object_unref (manager);
}
static void
process_get_all_result (GDBusObjectManagerClient *manager,
GVariant *value,
const gchar *name_owner)
{
GVariant *arg0;
const gchar *object_path;
GVariant *ifaces_and_properties;
GVariantIter iter;
g_return_if_fail (name_owner == NULL || g_dbus_is_unique_name (name_owner));
arg0 = g_variant_get_child_value (value, 0);
g_variant_iter_init (&iter, arg0);
while (g_variant_iter_next (&iter,
"{&o@a{sa{sv}}}",
&object_path,
&ifaces_and_properties))
{
add_interfaces (manager, object_path, ifaces_and_properties, name_owner);
g_variant_unref (ifaces_and_properties);
}
g_variant_unref (arg0);
}
static void
on_control_proxy_g_signal (GDBusProxy *proxy,
const gchar *sender_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
GWeakRef *manager_weak = user_data;
GDBusObjectManagerClient *manager = NULL;
const gchar *object_path;
manager = G_DBUS_OBJECT_MANAGER_CLIENT (g_weak_ref_get (manager_weak));
if (manager == NULL)
return;
//g_debug ("yay, g_signal %s: %s\n", signal_name, g_variant_print (parameters, TRUE));
if (g_strcmp0 (signal_name, "InterfacesAdded") == 0)
{
GVariant *ifaces_and_properties;
g_variant_get (parameters,
"(&o@a{sa{sv}})",
&object_path,
&ifaces_and_properties);
add_interfaces (manager, object_path, ifaces_and_properties, manager->priv->name_owner);
g_variant_unref (ifaces_and_properties);
}
else if (g_strcmp0 (signal_name, "InterfacesRemoved") == 0)
{
const gchar **ifaces;
g_variant_get (parameters,
"(&o^a&s)",
&object_path,
&ifaces);
remove_interfaces (manager, object_path, ifaces);
g_free (ifaces);
}
g_object_unref (manager);
}
/* ---------------------------------------------------------------------------------------------------- */
static const gchar *
g_dbus_object_manager_client_get_object_path (GDBusObjectManager *_manager)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (_manager);
return manager->priv->object_path;
}
static GDBusObject *
g_dbus_object_manager_client_get_object (GDBusObjectManager *_manager,
const gchar *object_path)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (_manager);
GDBusObject *ret;
g_mutex_lock (&manager->priv->lock);
ret = g_hash_table_lookup (manager->priv->map_object_path_to_object_proxy, object_path);
if (ret != NULL)
g_object_ref (ret);
g_mutex_unlock (&manager->priv->lock);
return ret;
}
static GDBusInterface *
g_dbus_object_manager_client_get_interface (GDBusObjectManager *_manager,
const gchar *object_path,
const gchar *interface_name)
{
GDBusInterface *ret;
GDBusObject *object;
ret = NULL;
object = g_dbus_object_manager_get_object (_manager, object_path);
if (object == NULL)
goto out;
ret = g_dbus_object_get_interface (object, interface_name);
g_object_unref (object);
out:
return ret;
}
static GList *
g_dbus_object_manager_client_get_objects (GDBusObjectManager *_manager)
{
GDBusObjectManagerClient *manager = G_DBUS_OBJECT_MANAGER_CLIENT (_manager);
GList *ret;
g_return_val_if_fail (G_IS_DBUS_OBJECT_MANAGER_CLIENT (manager), NULL);
g_mutex_lock (&manager->priv->lock);
ret = g_hash_table_get_values (manager->priv->map_object_path_to_object_proxy);
g_list_foreach (ret, (GFunc) g_object_ref, NULL);
g_mutex_unlock (&manager->priv->lock);
return ret;
}
static void
dbus_object_manager_interface_init (GDBusObjectManagerIface *iface)
{
iface->get_object_path = g_dbus_object_manager_client_get_object_path;
iface->get_objects = g_dbus_object_manager_client_get_objects;
iface->get_object = g_dbus_object_manager_client_get_object;
iface->get_interface = g_dbus_object_manager_client_get_interface;
}
/* ---------------------------------------------------------------------------------------------------- */
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