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glib/gio/gdbusproxy.c
Matthias Clasen a63d3bb868 mention inline use of floating variants
2010-05-11 23:18:48 -04:00

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/* GDBus - GLib D-Bus Library
*
* Copyright (C) 2008-2010 Red Hat, Inc.
*
* 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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: David Zeuthen <davidz@redhat.com>
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <gobject/gvaluecollector.h>
#include "gdbusutils.h"
#include "gdbusproxy.h"
#include "gioenumtypes.h"
#include "gdbusconnection.h"
#include "gdbuserror.h"
#include "gdbusprivate.h"
#include "gio-marshal.h"
#include "ginitable.h"
#include "gasyncinitable.h"
#include "gioerror.h"
#include "gasyncresult.h"
#include "gsimpleasyncresult.h"
#include "glibintl.h"
#include "gioalias.h"
/**
* SECTION:gdbusproxy
* @short_description: Base class for proxies
* @include: gio/gio.h
*
* #GDBusProxy is a base class used for proxies to access a D-Bus
* interface on a remote object. A #GDBusProxy can only be constructed
* for unique name bus and does not track whether the name
* vanishes. Use g_bus_watch_proxy() to construct #GDBusProxy proxies
* for owners of a well-known names.
*/
struct _GDBusProxyPrivate
{
GDBusConnection *connection;
GDBusProxyFlags flags;
gchar *unique_bus_name;
gchar *object_path;
gchar *interface_name;
gint timeout_msec;
/* gchar* -> GVariant* */
GHashTable *properties;
GDBusInterfaceInfo *expected_interface;
guint properties_changed_subscriber_id;
guint signals_subscriber_id;
};
enum
{
PROP_0,
PROP_G_CONNECTION,
PROP_G_UNIQUE_BUS_NAME,
PROP_G_FLAGS,
PROP_G_OBJECT_PATH,
PROP_G_INTERFACE_NAME,
PROP_G_DEFAULT_TIMEOUT,
PROP_G_INTERFACE_INFO
};
enum
{
PROPERTIES_CHANGED_SIGNAL,
SIGNAL_SIGNAL,
LAST_SIGNAL,
};
static void g_dbus_proxy_constructed (GObject *object);
guint signals[LAST_SIGNAL] = {0};
static void initable_iface_init (GInitableIface *initable_iface);
static void async_initable_iface_init (GAsyncInitableIface *async_initable_iface);
G_DEFINE_TYPE_WITH_CODE (GDBusProxy, g_dbus_proxy, G_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, initable_iface_init)
G_IMPLEMENT_INTERFACE (G_TYPE_ASYNC_INITABLE, async_initable_iface_init)
);
static void
g_dbus_proxy_finalize (GObject *object)
{
GDBusProxy *proxy = G_DBUS_PROXY (object);
if (proxy->priv->properties_changed_subscriber_id > 0)
g_dbus_connection_signal_unsubscribe (proxy->priv->connection,
proxy->priv->properties_changed_subscriber_id);
if (proxy->priv->signals_subscriber_id > 0)
g_dbus_connection_signal_unsubscribe (proxy->priv->connection,
proxy->priv->signals_subscriber_id);
g_object_unref (proxy->priv->connection);
g_free (proxy->priv->unique_bus_name);
g_free (proxy->priv->object_path);
g_free (proxy->priv->interface_name);
if (proxy->priv->properties != NULL)
g_hash_table_unref (proxy->priv->properties);
if (proxy->priv->expected_interface != NULL)
g_dbus_interface_info_unref (proxy->priv->expected_interface);
G_OBJECT_CLASS (g_dbus_proxy_parent_class)->finalize (object);
}
static void
g_dbus_proxy_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GDBusProxy *proxy = G_DBUS_PROXY (object);
switch (prop_id)
{
case PROP_G_CONNECTION:
g_value_set_object (value, proxy->priv->connection);
break;
case PROP_G_FLAGS:
g_value_set_flags (value, proxy->priv->flags);
break;
case PROP_G_UNIQUE_BUS_NAME:
g_value_set_string (value, proxy->priv->unique_bus_name);
break;
case PROP_G_OBJECT_PATH:
g_value_set_string (value, proxy->priv->object_path);
break;
case PROP_G_INTERFACE_NAME:
g_value_set_string (value, proxy->priv->interface_name);
break;
case PROP_G_DEFAULT_TIMEOUT:
g_value_set_int (value, proxy->priv->timeout_msec);
break;
case PROP_G_INTERFACE_INFO:
g_value_set_boxed (value, g_dbus_proxy_get_interface_info (proxy));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_dbus_proxy_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GDBusProxy *proxy = G_DBUS_PROXY (object);
switch (prop_id)
{
case PROP_G_CONNECTION:
proxy->priv->connection = g_value_dup_object (value);
break;
case PROP_G_FLAGS:
proxy->priv->flags = g_value_get_flags (value);
break;
case PROP_G_UNIQUE_BUS_NAME:
proxy->priv->unique_bus_name = g_value_dup_string (value);
break;
case PROP_G_OBJECT_PATH:
proxy->priv->object_path = g_value_dup_string (value);
break;
case PROP_G_INTERFACE_NAME:
proxy->priv->interface_name = g_value_dup_string (value);
break;
case PROP_G_DEFAULT_TIMEOUT:
g_dbus_proxy_set_default_timeout (proxy, g_value_get_int (value));
break;
case PROP_G_INTERFACE_INFO:
g_dbus_proxy_set_interface_info (proxy, g_value_get_boxed (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
g_dbus_proxy_class_init (GDBusProxyClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = g_dbus_proxy_finalize;
gobject_class->set_property = g_dbus_proxy_set_property;
gobject_class->get_property = g_dbus_proxy_get_property;
gobject_class->constructed = g_dbus_proxy_constructed;
/* Note that all property names are prefixed to avoid collisions with D-Bus property names
* in derived classes */
/**
* GDBusProxy:g-interface-info:
*
* Ensure that interactions with this proxy conform to the given
* interface. For example, when completing a method call, if the
* type signature of the message isn't what's expected, the given
* #GError is set. Signals that have a type signature mismatch are
* simply dropped.
*
* Since: 2.26
*/
g_object_class_install_property (gobject_class,
PROP_G_INTERFACE_INFO,
g_param_spec_boxed ("g-interface-info",
P_("Interface Information"),
P_("Interface Information"),
G_TYPE_DBUS_INTERFACE_INFO,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusProxy:g-connection:
*
* The #GDBusConnection the proxy is for.
*
* Since: 2.26
*/
g_object_class_install_property (gobject_class,
PROP_G_CONNECTION,
g_param_spec_object ("g-connection",
P_("g-connection"),
P_("The connection the proxy is for"),
G_TYPE_DBUS_CONNECTION,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusProxy:g-flags:
*
* Flags from the #GDBusProxyFlags enumeration.
*
* Since: 2.26
*/
g_object_class_install_property (gobject_class,
PROP_G_FLAGS,
g_param_spec_flags ("g-flags",
P_("g-flags"),
P_("Flags for the proxy"),
G_TYPE_DBUS_PROXY_FLAGS,
G_DBUS_PROXY_FLAGS_NONE,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusProxy:g-unique-bus-name:
*
* The unique bus name the proxy is for.
*
* Since: 2.26
*/
g_object_class_install_property (gobject_class,
PROP_G_UNIQUE_BUS_NAME,
g_param_spec_string ("g-unique-bus-name",
P_("g-unique-bus-name"),
P_("The unique bus name the proxy is for"),
NULL,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusProxy:g-object-path:
*
* The object path the proxy is for.
*
* Since: 2.26
*/
g_object_class_install_property (gobject_class,
PROP_G_OBJECT_PATH,
g_param_spec_string ("g-object-path",
P_("g-object-path"),
P_("The object path the proxy is for"),
NULL,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusProxy:g-interface-name:
*
* The D-Bus interface name the proxy is for.
*
* Since: 2.26
*/
g_object_class_install_property (gobject_class,
PROP_G_INTERFACE_NAME,
g_param_spec_string ("g-interface-name",
P_("g-interface-name"),
P_("The D-Bus interface name the proxy is for"),
NULL,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT_ONLY |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusProxy:g-default-timeout:
*
* The timeout to use if -1 (specifying default timeout) is passed
* as @timeout_msec in the g_dbus_proxy_call() and
* g_dbus_proxy_call_sync() functions.
*
* This allows applications to set a proxy-wide timeout for all
* remote method invocations on the proxy. If this property is -1,
* the default timeout (typically 25 seconds) is used. If set to
* %G_MAXINT, then no timeout is used.
*
* Since: 2.26
*/
g_object_class_install_property (gobject_class,
PROP_G_DEFAULT_TIMEOUT,
g_param_spec_int ("g-default-timeout",
P_("Default Timeout"),
P_("Timeout for remote method invocation"),
-1,
G_MAXINT,
-1,
G_PARAM_READABLE |
G_PARAM_WRITABLE |
G_PARAM_CONSTRUCT |
G_PARAM_STATIC_NAME |
G_PARAM_STATIC_BLURB |
G_PARAM_STATIC_NICK));
/**
* GDBusProxy::g-properties-changed:
* @proxy: The #GDBusProxy emitting the signal.
* @changed_properties: A #GVariant containing the properties that changed.
*
* Emitted when one or more D-Bus properties on @proxy changes. The cached properties
* are already replaced when this signal fires.
*
* Since: 2.26
*/
signals[PROPERTIES_CHANGED_SIGNAL] = g_signal_new ("g-properties-changed",
G_TYPE_DBUS_PROXY,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDBusProxyClass, g_properties_changed),
NULL,
NULL,
g_cclosure_marshal_VOID__BOXED,
G_TYPE_NONE,
1,
G_TYPE_VARIANT);
/**
* GDBusProxy::g-signal:
* @proxy: The #GDBusProxy emitting the signal.
* @sender_name: The sender of the signal or %NULL if the connection is not a bus connection.
* @signal_name: The name of the signal.
* @parameters: A #GVariant tuple with parameters for the signal.
*
* Emitted when a signal from the remote object and interface that @proxy is for, has been received.
*
* Since: 2.26
*/
signals[SIGNAL_SIGNAL] = g_signal_new ("g-signal",
G_TYPE_DBUS_PROXY,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GDBusProxyClass, g_signal),
NULL,
NULL,
_gio_marshal_VOID__STRING_STRING_BOXED,
G_TYPE_NONE,
3,
G_TYPE_STRING,
G_TYPE_STRING,
G_TYPE_VARIANT);
g_type_class_add_private (klass, sizeof (GDBusProxyPrivate));
}
static void
g_dbus_proxy_init (GDBusProxy *proxy)
{
proxy->priv = G_TYPE_INSTANCE_GET_PRIVATE (proxy, G_TYPE_DBUS_PROXY, GDBusProxyPrivate);
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_proxy_get_cached_property_names:
* @proxy: A #GDBusProxy.
* @error: Return location for error or %NULL.
*
* Gets the names of all cached properties on @proxy.
*
* Returns: A %NULL-terminated array of strings or %NULL if @error is set. Free with
* g_strfreev().
*
* Since: 2.26
*/
gchar **
g_dbus_proxy_get_cached_property_names (GDBusProxy *proxy,
GError **error)
{
gchar **names;
GPtrArray *p;
GHashTableIter iter;
const gchar *key;
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
names = NULL;
if (proxy->priv->flags & G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
_("Properties are not available (proxy created with G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES)"));
goto out;
}
p = g_ptr_array_new ();
g_hash_table_iter_init (&iter, proxy->priv->properties);
while (g_hash_table_iter_next (&iter, (gpointer) &key, NULL))
g_ptr_array_add (p, g_strdup (key));
g_ptr_array_sort (p, (GCompareFunc) g_strcmp0);
g_ptr_array_add (p, NULL);
names = (gchar **) g_ptr_array_free (p, FALSE);
out:
return names;
}
/**
* g_dbus_proxy_get_cached_property:
* @proxy: A #GDBusProxy.
* @property_name: Property name.
* @error: Return location for error or %NULL.
*
* Looks up the value for a property from the cache. This call does no blocking IO.
*
* Normally you will not need to modify the returned variant since it is updated automatically
* in response to <literal>org.freedesktop.DBus.Properties.PropertiesChanged</literal>
* D-Bus signals (which also causes #GDBusProxy::g-properties-changed to be emitted).
*
* However, for properties for which said D-Bus signal is not emitted, you
* can catch other signals and modify the returned variant accordingly (remember to emit
* #GDBusProxy::g-properties-changed yourself).
*
* Returns: A reference to the #GVariant instance that holds the value for @property_name or
* %NULL if @error is set. Free the reference with g_variant_unref().
*
* Since: 2.26
*/
GVariant *
g_dbus_proxy_get_cached_property (GDBusProxy *proxy,
const gchar *property_name,
GError **error)
{
GVariant *value;
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
g_return_val_if_fail (property_name != NULL, NULL);
value = NULL;
if (proxy->priv->flags & G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
_("Properties are not available (proxy created with G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES)"));
goto out;
}
value = g_hash_table_lookup (proxy->priv->properties, property_name);
if (value == NULL)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_FAILED,
_("No property with name %s"),
property_name);
goto out;
}
g_variant_ref (value);
out:
return value;
}
/* ---------------------------------------------------------------------------------------------------- */
static void
on_signal_received (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
GDBusProxy *proxy = G_DBUS_PROXY (user_data);
g_signal_emit (proxy,
signals[SIGNAL_SIGNAL],
0,
sender_name,
signal_name,
parameters);
}
/* ---------------------------------------------------------------------------------------------------- */
static void
on_properties_changed (GDBusConnection *connection,
const gchar *sender_name,
const gchar *object_path,
const gchar *interface_name,
const gchar *signal_name,
GVariant *parameters,
gpointer user_data)
{
GDBusProxy *proxy = G_DBUS_PROXY (user_data);
GError *error;
const gchar *interface_name_for_signal;
GVariantIter *iter;
GVariant *item;
GVariant *changed_properties;
GVariantBuilder *builder;
error = NULL;
iter = NULL;
#if 0 // TODO!
/* Ignore this signal if properties are not yet available
*
* (can happen in the window between subscribing to PropertiesChanged() and until
* org.freedesktop.DBus.Properties.GetAll() returns)
*/
if (!proxy->priv->properties_available)
goto out;
#endif
if (strcmp (g_variant_get_type_string (parameters), "(sa{sv})") != 0)
{
g_warning ("Value for PropertiesChanged signal with type `%s' does not match `(sa{sv})'",
g_variant_get_type_string (parameters));
goto out;
}
g_variant_get (parameters,
"(sa{sv})",
&interface_name_for_signal,
&iter);
if (g_strcmp0 (interface_name_for_signal, proxy->priv->interface_name) != 0)
goto out;
builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
while ((item = g_variant_iter_next_value (iter)))
{
const gchar *key;
GVariant *value;
g_variant_get (item,
"{sv}",
&key,
&value);
g_hash_table_insert (proxy->priv->properties,
g_strdup (key),
value); /* steals value */
g_variant_builder_add (builder,
"{sv}",
g_strdup (key),
g_variant_ref (value));
}
changed_properties = g_variant_builder_end (builder);
/* emit signal */
g_signal_emit (proxy, signals[PROPERTIES_CHANGED_SIGNAL], 0, changed_properties);
g_variant_unref (changed_properties);
out:
if (iter != NULL)
g_variant_iter_free (iter);
}
/* ---------------------------------------------------------------------------------------------------- */
static void
g_dbus_proxy_constructed (GObject *object)
{
if (G_OBJECT_CLASS (g_dbus_proxy_parent_class)->constructed != NULL)
G_OBJECT_CLASS (g_dbus_proxy_parent_class)->constructed (object);
}
/* ---------------------------------------------------------------------------------------------------- */
static void
subscribe_to_signals (GDBusProxy *proxy)
{
if (!(proxy->priv->flags & G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES))
{
/* subscribe to PropertiesChanged() */
proxy->priv->properties_changed_subscriber_id =
g_dbus_connection_signal_subscribe (proxy->priv->connection,
proxy->priv->unique_bus_name,
"org.freedesktop.DBus.Properties",
"PropertiesChanged",
proxy->priv->object_path,
proxy->priv->interface_name,
on_properties_changed,
proxy,
NULL);
}
if (!(proxy->priv->flags & G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS))
{
/* subscribe to all signals for the object */
proxy->priv->signals_subscriber_id =
g_dbus_connection_signal_subscribe (proxy->priv->connection,
proxy->priv->unique_bus_name,
proxy->priv->interface_name,
NULL, /* member */
proxy->priv->object_path,
NULL, /* arg0 */
on_signal_received,
proxy,
NULL);
}
}
/* ---------------------------------------------------------------------------------------------------- */
static void
process_get_all_reply (GDBusProxy *proxy,
GVariant *result)
{
GVariantIter iter;
GVariant *item;
if (strcmp (g_variant_get_type_string (result), "(a{sv})") != 0)
{
g_warning ("Value for GetAll reply with type `%s' does not match `(a{sv})'",
g_variant_get_type_string (result));
goto out;
}
proxy->priv->properties = g_hash_table_new_full (g_str_hash,
g_str_equal,
g_free,
(GDestroyNotify) g_variant_unref);
g_variant_iter_init (&iter, g_variant_get_child_value (result, 0));
while ((item = g_variant_iter_next_value (&iter)) != NULL)
{
const gchar *key;
GVariant *value;
g_variant_get (item,
"{sv}",
&key,
&value);
//g_print ("got %s -> %s\n", key, g_variant_markup_print (value, FALSE, 0, 0));
g_hash_table_insert (proxy->priv->properties,
g_strdup (key),
value); /* steals value */
}
out:
;
}
static gboolean
initable_init (GInitable *initable,
GCancellable *cancellable,
GError **error)
{
GDBusProxy *proxy = G_DBUS_PROXY (initable);
GVariant *result;
gboolean ret;
ret = FALSE;
if (!(proxy->priv->flags & G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES))
{
/* load all properties synchronously */
result = g_dbus_connection_call_sync (proxy->priv->connection,
proxy->priv->unique_bus_name,
proxy->priv->object_path,
"org.freedesktop.DBus.Properties",
"GetAll",
g_variant_new ("(s)", proxy->priv->interface_name),
G_DBUS_CALL_FLAGS_NONE,
-1, /* timeout */
cancellable,
error);
if (result == NULL)
goto out;
process_get_all_reply (proxy, result);
g_variant_unref (result);
}
subscribe_to_signals (proxy);
ret = TRUE;
out:
return ret;
}
static void
initable_iface_init (GInitableIface *initable_iface)
{
initable_iface->init = initable_init;
}
/* ---------------------------------------------------------------------------------------------------- */
static void
get_all_cb (GDBusConnection *connection,
GAsyncResult *res,
gpointer user_data)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
GVariant *result;
GError *error;
error = NULL;
result = g_dbus_connection_call_finish (connection,
res,
&error);
if (result == NULL)
{
g_simple_async_result_set_from_error (simple, error);
g_error_free (error);
}
else
{
g_simple_async_result_set_op_res_gpointer (simple,
result,
(GDestroyNotify) g_variant_unref);
}
g_simple_async_result_complete_in_idle (simple);
g_object_unref (simple);
}
static void
async_initable_init_async (GAsyncInitable *initable,
gint io_priority,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GDBusProxy *proxy = G_DBUS_PROXY (initable);
GSimpleAsyncResult *simple;
simple = g_simple_async_result_new (G_OBJECT (proxy),
callback,
user_data,
NULL);
if (!(proxy->priv->flags & G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES))
{
/* load all properties asynchronously */
g_dbus_connection_call (proxy->priv->connection,
proxy->priv->unique_bus_name,
proxy->priv->object_path,
"org.freedesktop.DBus.Properties",
"GetAll",
g_variant_new ("(s)", proxy->priv->interface_name),
G_DBUS_CALL_FLAGS_NONE,
-1, /* timeout */
cancellable,
(GAsyncReadyCallback) get_all_cb,
simple);
}
else
{
g_simple_async_result_complete_in_idle (simple);
g_object_unref (simple);
}
}
static gboolean
async_initable_init_finish (GAsyncInitable *initable,
GAsyncResult *res,
GError **error)
{
GDBusProxy *proxy = G_DBUS_PROXY (initable);
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
GVariant *result;
gboolean ret;
ret = FALSE;
result = g_simple_async_result_get_op_res_gpointer (simple);
if (result == NULL)
{
if (!(proxy->priv->flags & G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES))
{
g_simple_async_result_propagate_error (simple, error);
goto out;
}
}
else
{
process_get_all_reply (proxy, result);
}
subscribe_to_signals (proxy);
ret = TRUE;
out:
return ret;
}
static void
async_initable_iface_init (GAsyncInitableIface *async_initable_iface)
{
async_initable_iface->init_async = async_initable_init_async;
async_initable_iface->init_finish = async_initable_init_finish;
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_proxy_new:
* @connection: A #GDBusConnection.
* @object_type: Either #G_TYPE_DBUS_PROXY or the #GType for the #GDBusProxy<!-- -->-derived type of proxy to create.
* @flags: Flags used when constructing the proxy.
* @info: A #GDBusInterfaceInfo specifying the minimal interface that @proxy conforms to or %NULL.
* @unique_bus_name: A unique bus name or %NULL if @connection is not a message bus connection.
* @object_path: An object path.
* @interface_name: A D-Bus interface name.
* @cancellable: A #GCancellable or %NULL.
* @callback: Callback function to invoke when the proxy is ready.
* @user_data: User data to pass to @callback.
*
* Creates a proxy for accessing @interface_name on the remote object at @object_path
* owned by @unique_bus_name at @connection and asynchronously loads D-Bus properties unless the
* #G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES flag is used. Connect to the
* #GDBusProxy::g-properties-changed signal to get notified about property changes.
*
* If the #G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS flag is not set, also sets up
* match rules for signals. Connect to the #GDBusProxy::g-signal signal
* to handle signals from the remote object.
*
* This is a failable asynchronous constructor - when the proxy is
* ready, @callback will be invoked and you can use
* g_dbus_proxy_new_finish() to get the result.
*
* See g_dbus_proxy_new_sync() and for a synchronous version of this constructor.
*
* Since: 2.26
*/
void
g_dbus_proxy_new (GDBusConnection *connection,
GType object_type,
GDBusProxyFlags flags,
GDBusInterfaceInfo *info,
const gchar *unique_bus_name,
const gchar *object_path,
const gchar *interface_name,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
g_return_if_fail (g_type_is_a (object_type, G_TYPE_DBUS_PROXY));
g_return_if_fail ((unique_bus_name == NULL && g_dbus_connection_get_unique_name (connection) == NULL) ||
g_dbus_is_unique_name (unique_bus_name));
g_return_if_fail (g_variant_is_object_path (object_path));
g_return_if_fail (g_dbus_is_interface_name (interface_name));
g_async_initable_new_async (object_type,
G_PRIORITY_DEFAULT,
cancellable,
callback,
user_data,
"g-flags", flags,
"g-interface-info", info,
"g-unique-bus-name", unique_bus_name,
"g-connection", connection,
"g-object-path", object_path,
"g-interface-name", interface_name,
NULL);
}
/**
* g_dbus_proxy_new_finish:
* @res: A #GAsyncResult obtained from the #GAsyncReadyCallback function passed to g_dbus_proxy_new().
* @error: Return location for error or %NULL.
*
* Finishes creating a #GDBusProxy.
*
* Returns: A #GDBusProxy or %NULL if @error is set. Free with g_object_unref().
*
* Since: 2.26
*/
GDBusProxy *
g_dbus_proxy_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_PROXY (object);
else
return NULL;
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_proxy_new_sync:
* @connection: A #GDBusConnection.
* @object_type: Either #G_TYPE_DBUS_PROXY or the #GType for the #GDBusProxy<!-- -->-derived type of proxy to create.
* @flags: Flags used when constructing the proxy.
* @info: A #GDBusInterfaceInfo specifying the minimal interface that @proxy conforms to or %NULL.
* @unique_bus_name: A unique bus name or %NULL if @connection is not a message bus connection.
* @object_path: An object path.
* @interface_name: A D-Bus interface name.
* @cancellable: A #GCancellable or %NULL.
* @error: Return location for error or %NULL.
*
* Creates a proxy for accessing @interface_name on the remote object at @object_path
* owned by @unique_bus_name at @connection and synchronously loads D-Bus properties unless the
* #G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES flag is used.
*
* If the #G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS flag is not set, also sets up
* match rules for signals. Connect to the #GDBusProxy::g-signal signal
* to handle signals from the remote object.
*
* This is a synchronous failable constructor. See g_dbus_proxy_new()
* and g_dbus_proxy_new_finish() for the asynchronous version.
*
* Returns: A #GDBusProxy or %NULL if error is set. Free with g_object_unref().
*
* Since: 2.26
*/
GDBusProxy *
g_dbus_proxy_new_sync (GDBusConnection *connection,
GType object_type,
GDBusProxyFlags flags,
GDBusInterfaceInfo *info,
const gchar *unique_bus_name,
const gchar *object_path,
const gchar *interface_name,
GCancellable *cancellable,
GError **error)
{
GInitable *initable;
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), NULL);
g_return_val_if_fail (g_type_is_a (object_type, G_TYPE_DBUS_PROXY), NULL);
g_return_val_if_fail ((unique_bus_name == NULL && g_dbus_connection_get_unique_name (connection) == NULL) ||
g_dbus_is_unique_name (unique_bus_name), NULL);
g_return_val_if_fail (g_variant_is_object_path (object_path), NULL);
g_return_val_if_fail (g_dbus_is_interface_name (interface_name), NULL);
initable = g_initable_new (object_type,
cancellable,
error,
"g-flags", flags,
"g-interface-info", info,
"g-unique-bus-name", unique_bus_name,
"g-connection", connection,
"g-object-path", object_path,
"g-interface-name", interface_name,
NULL);
if (initable != NULL)
return G_DBUS_PROXY (initable);
else
return NULL;
}
/* ---------------------------------------------------------------------------------------------------- */
/**
* g_dbus_proxy_get_connection:
* @proxy: A #GDBusProxy.
*
* Gets the connection @proxy is for.
*
* Returns: A #GDBusConnection owned by @proxy. Do not free.
*
* Since: 2.26
*/
GDBusConnection *
g_dbus_proxy_get_connection (GDBusProxy *proxy)
{
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
return proxy->priv->connection;
}
/**
* g_dbus_proxy_get_flags:
* @proxy: A #GDBusProxy.
*
* Gets the flags that @proxy was constructed with.
*
* Returns: Flags from the #GDBusProxyFlags enumeration.
*
* Since: 2.26
*/
GDBusProxyFlags
g_dbus_proxy_get_flags (GDBusProxy *proxy)
{
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), 0);
return proxy->priv->flags;
}
/**
* g_dbus_proxy_get_unique_bus_name:
* @proxy: A #GDBusProxy.
*
* Gets the unique bus name @proxy is for.
*
* Returns: A string owned by @proxy. Do not free.
*
* Since: 2.26
*/
const gchar *
g_dbus_proxy_get_unique_bus_name (GDBusProxy *proxy)
{
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
return proxy->priv->unique_bus_name;
}
/**
* g_dbus_proxy_get_object_path:
* @proxy: A #GDBusProxy.
*
* Gets the object path @proxy is for.
*
* Returns: A string owned by @proxy. Do not free.
*
* Since: 2.26
*/
const gchar *
g_dbus_proxy_get_object_path (GDBusProxy *proxy)
{
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
return proxy->priv->object_path;
}
/**
* g_dbus_proxy_get_interface_name:
* @proxy: A #GDBusProxy.
*
* Gets the D-Bus interface name @proxy is for.
*
* Returns: A string owned by @proxy. Do not free.
*
* Since: 2.26
*/
const gchar *
g_dbus_proxy_get_interface_name (GDBusProxy *proxy)
{
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
return proxy->priv->interface_name;
}
/**
* g_dbus_proxy_get_default_timeout:
* @proxy: A #GDBusProxy.
*
* Gets the timeout to use if -1 (specifying default timeout) is
* passed as @timeout_msec in the g_dbus_proxy_call() and
* g_dbus_proxy_call_sync() functions.
*
* See the #GDBusProxy:g-default-timeout property for more details.
*
* Returns: Timeout to use for @proxy.
*
* Since: 2.26
*/
gint
g_dbus_proxy_get_default_timeout (GDBusProxy *proxy)
{
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), -1);
return proxy->priv->timeout_msec;
}
/**
* g_dbus_proxy_set_default_timeout:
* @proxy: A #GDBusProxy.
* @timeout_msec: Timeout in milliseconds.
*
* Sets the timeout to use if -1 (specifying default timeout) is
* passed as @timeout_msec in the g_dbus_proxy_call() and
* g_dbus_proxy_call_sync() functions.
*
* See the #GDBusProxy:g-default-timeout property for more details.
*
* Since: 2.26
*/
void
g_dbus_proxy_set_default_timeout (GDBusProxy *proxy,
gint timeout_msec)
{
g_return_if_fail (G_IS_DBUS_PROXY (proxy));
g_return_if_fail (timeout_msec == -1 || timeout_msec >= 0);
/* TODO: locking? */
if (proxy->priv->timeout_msec != timeout_msec)
{
proxy->priv->timeout_msec = timeout_msec;
g_object_notify (G_OBJECT (proxy), "g-default-timeout");
}
}
/**
* g_dbus_proxy_get_interface_info:
* @proxy: A #GDBusProxy
*
* Returns the #GDBusInterfaceInfo, if any, specifying the minimal
* interface that @proxy conforms to.
*
* See the #GDBusProxy:g-interface-info property for more details.
*
* Returns: A #GDBusInterfaceInfo or %NULL. Do not unref the returned
* object, it is owned by @proxy.
*
* Since: 2.26
*/
GDBusInterfaceInfo *
g_dbus_proxy_get_interface_info (GDBusProxy *proxy)
{
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
return proxy->priv->expected_interface;
}
/**
* g_dbus_proxy_set_interface_info:
* @proxy: A #GDBusProxy
* @info: Minimum interface this proxy conforms to or %NULL to unset.
*
* Ensure that interactions with @proxy conform to the given
* interface. For example, when completing a method call, if the type
* signature of the message isn't what's expected, the given #GError
* is set. Signals that have a type signature mismatch are simply
* dropped.
*
* See the #GDBusProxy:g-interface-info property for more details.
*
* Since: 2.26
*/
void
g_dbus_proxy_set_interface_info (GDBusProxy *proxy,
GDBusInterfaceInfo *info)
{
g_return_if_fail (G_IS_DBUS_PROXY (proxy));
if (proxy->priv->expected_interface != NULL)
g_dbus_interface_info_unref (proxy->priv->expected_interface);
proxy->priv->expected_interface = info != NULL ? g_dbus_interface_info_ref (info) : NULL;
}
/* ---------------------------------------------------------------------------------------------------- */
static gboolean
maybe_split_method_name (const gchar *method_name,
gchar **out_interface_name,
const gchar **out_method_name)
{
gboolean was_split;
was_split = FALSE;
g_assert (out_interface_name != NULL);
g_assert (out_method_name != NULL);
*out_interface_name = NULL;
*out_method_name = NULL;
if (strchr (method_name, '.') != NULL)
{
gchar *p;
gchar *last_dot;
p = g_strdup (method_name);
last_dot = strrchr (p, '.');
*last_dot = '\0';
*out_interface_name = p;
*out_method_name = last_dot + 1;
was_split = TRUE;
}
return was_split;
}
static void
reply_cb (GDBusConnection *connection,
GAsyncResult *res,
gpointer user_data)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (user_data);
GVariant *value;
GError *error;
error = NULL;
value = g_dbus_connection_call_finish (connection,
res,
&error);
if (error != NULL)
{
g_simple_async_result_set_from_error (simple,
error);
g_error_free (error);
}
else
{
g_simple_async_result_set_op_res_gpointer (simple,
value,
(GDestroyNotify) g_variant_unref);
}
/* no need to complete in idle since the method GDBusConnection already does */
g_simple_async_result_complete (simple);
}
static const GDBusMethodInfo *
lookup_method_info_or_warn (GDBusProxy *proxy,
const gchar *method_name)
{
const GDBusMethodInfo *info;
if (!proxy->priv->expected_interface)
return NULL;
info = g_dbus_interface_info_lookup_method (proxy->priv->expected_interface, method_name);
if (!info)
g_warning ("Trying to invoke method %s which isn't in expected interface %s",
method_name, proxy->priv->expected_interface->name);
return info;
}
static gboolean
validate_method_return (const char *method_name,
GVariant *value,
const GDBusMethodInfo *expected_method_info,
GError **error)
{
const gchar *type_string;
gchar *signature;
gboolean ret;
ret = TRUE;
signature = NULL;
if (value == NULL || expected_method_info == NULL)
goto out;
/* Shouldn't happen... */
if (g_variant_classify (value) != G_VARIANT_CLASS_TUPLE)
goto out;
type_string = g_variant_get_type_string (value);
signature = _g_dbus_compute_complete_signature (expected_method_info->out_args, TRUE);
if (g_strcmp0 (type_string, signature) != 0)
{
g_set_error (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_ARGUMENT,
_("Method `%s' returned signature `%s', but expected `%s'"),
method_name,
type_string,
signature);
ret = FALSE;
}
out:
g_free (signature);
return ret;
}
/**
* g_dbus_proxy_call:
* @proxy: A #GDBusProxy.
* @method_name: Name of method to invoke.
* @parameters: A #GVariant tuple with parameters for the signal or %NULL if not passing parameters.
* @flags: Flags from the #GDBusCallFlags enumeration.
* @timeout_msec: The timeout in milliseconds or -1 to use the proxy default timeout.
* @cancellable: A #GCancellable or %NULL.
* @callback: A #GAsyncReadyCallback to call when the request is satisfied or %NULL if you don't
* care about the result of the method invocation.
* @user_data: The data to pass to @callback.
*
* Asynchronously invokes the @method_name method on @proxy.
*
* If @method_name contains any dots, then @name is split into interface and
* method name parts. This allows using @proxy for invoking methods on
* other interfaces.
*
* If the #GDBusConnection associated with @proxy is closed then
* the operation will fail with %G_IO_ERROR_CLOSED. If
* @cancellable is canceled, the operation will fail with
* %G_IO_ERROR_CANCELLED. If @parameters contains a value not
* compatible with the D-Bus protocol, the operation fails with
* %G_IO_ERROR_INVALID_ARGUMENT.
*
* If the @parameters #GVariant is floating, it is consumed. This allows
* convenient 'inline' use of g_variant_new(), e.g.:
* |[
* g_dbus_proxy_call (proxy,
* "TwoStrings",
* g_variant_new ("(ss)",
* "Thing One",
* "Thing Two"),
* G_DBUS_CALL_FLAGS_NONE,
* -1,
* NULL,
* (GAsyncReadyCallback) two_strings_done,
* &amp;data);
* ]|
*
* This is an asynchronous method. When the operation is finished,
* @callback 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 method from.
* You can then call g_dbus_proxy_call_finish() to get the result of
* the operation. See g_dbus_proxy_call_sync() for the synchronous
* version of this method.
*
* Since: 2.26
*/
void
g_dbus_proxy_call (GDBusProxy *proxy,
const gchar *method_name,
GVariant *parameters,
GDBusCallFlags flags,
gint timeout_msec,
GCancellable *cancellable,
GAsyncReadyCallback callback,
gpointer user_data)
{
GSimpleAsyncResult *simple;
gboolean was_split;
gchar *split_interface_name;
const gchar *split_method_name;
const GDBusMethodInfo *expected_method_info;
const gchar *target_method_name;
const gchar *target_interface_name;
g_return_if_fail (G_IS_DBUS_PROXY (proxy));
g_return_if_fail (g_dbus_is_member_name (method_name) || g_dbus_is_interface_name (method_name));
g_return_if_fail (parameters == NULL || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE));
g_return_if_fail (timeout_msec == -1 || timeout_msec >= 0);
simple = g_simple_async_result_new (G_OBJECT (proxy),
callback,
user_data,
g_dbus_proxy_call);
was_split = maybe_split_method_name (method_name, &split_interface_name, &split_method_name);
target_method_name = was_split ? split_method_name : method_name;
target_interface_name = was_split ? split_interface_name : proxy->priv->interface_name;
g_object_set_data_full (G_OBJECT (simple), "-gdbus-proxy-method-name", g_strdup (target_method_name), g_free);
/* Just warn here */
expected_method_info = lookup_method_info_or_warn (proxy, target_method_name);
g_dbus_connection_call (proxy->priv->connection,
proxy->priv->unique_bus_name,
proxy->priv->object_path,
target_interface_name,
target_method_name,
parameters,
flags,
timeout_msec == -1 ? proxy->priv->timeout_msec : timeout_msec,
cancellable,
(GAsyncReadyCallback) reply_cb,
simple);
g_free (split_interface_name);
}
/**
* g_dbus_proxy_call_finish:
* @proxy: A #GDBusProxy.
* @res: A #GAsyncResult obtained from the #GAsyncReadyCallback passed to g_dbus_proxy_call().
* @error: Return location for error or %NULL.
*
* Finishes an operation started with g_dbus_proxy_call().
*
* Returns: %NULL if @error is set. Otherwise a #GVariant tuple with
* return values. Free with g_variant_unref().
*
* Since: 2.26
*/
GVariant *
g_dbus_proxy_call_finish (GDBusProxy *proxy,
GAsyncResult *res,
GError **error)
{
GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
GVariant *value;
const char *method_name;
const GDBusMethodInfo *expected_method_info;
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
g_return_val_if_fail (G_IS_ASYNC_RESULT (res), NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_dbus_proxy_call);
value = NULL;
if (g_simple_async_result_propagate_error (simple, error))
goto out;
value = g_simple_async_result_get_op_res_gpointer (simple);
method_name = g_object_get_data (G_OBJECT (simple), "-gdbus-proxy-method-name");
/* We may not have a method name for internally-generated proxy calls like GetAll */
if (value && method_name && proxy->priv->expected_interface)
{
expected_method_info = g_dbus_interface_info_lookup_method (proxy->priv->expected_interface, method_name);
if (!validate_method_return (method_name, value, expected_method_info, error))
{
g_variant_unref (value);
value = NULL;
}
}
out:
return value;
}
/**
* g_dbus_proxy_call_sync:
* @proxy: A #GDBusProxy.
* @method_name: Name of method to invoke.
* @parameters: A #GVariant tuple with parameters for the signal or %NULL if not passing parameters.
* @flags: Flags from the #GDBusCallFlags enumeration.
* @timeout_msec: The timeout in milliseconds or -1 to use the proxy default timeout.
* @cancellable: A #GCancellable or %NULL.
* @error: Return location for error or %NULL.
*
* Synchronously invokes the @method_name method on @proxy.
*
* If @method_name contains any dots, then @name is split into interface and
* method name parts. This allows using @proxy for invoking methods on
* other interfaces.
*
* If the #GDBusConnection associated with @proxy is disconnected then
* the operation will fail with %G_IO_ERROR_CLOSED. If
* @cancellable is canceled, the operation will fail with
* %G_IO_ERROR_CANCELLED. If @parameters contains a value not
* compatible with the D-Bus protocol, the operation fails with
* %G_IO_ERROR_INVALID_ARGUMENT.
*
* If the @parameters #GVariant is floating, it is consumed. This allows
* convenient 'inline' use of g_variant_new(), e.g.:
* |[
* g_dbus_proxy_call_sync (proxy,
* "TwoStrings",
* g_variant_new ("(ss)",
* "Thing One",
* "Thing Two"),
* G_DBUS_CALL_FLAGS_NONE,
* -1,
* NULL,
* &amp;error);
* ]|
*
* The calling thread is blocked until a reply is received. See
* g_dbus_proxy_call() for the asynchronous version of this
* method.
*
* Returns: %NULL if @error is set. Otherwise a #GVariant tuple with
* return values. Free with g_variant_unref().
*
* Since: 2.26
*/
GVariant *
g_dbus_proxy_call_sync (GDBusProxy *proxy,
const gchar *method_name,
GVariant *parameters,
GDBusCallFlags flags,
gint timeout_msec,
GCancellable *cancellable,
GError **error)
{
GVariant *ret;
gboolean was_split;
gchar *split_interface_name;
const gchar *split_method_name;
const GDBusMethodInfo *expected_method_info;
const gchar *target_method_name;
const gchar *target_interface_name;
g_return_val_if_fail (G_IS_DBUS_PROXY (proxy), NULL);
g_return_val_if_fail (g_dbus_is_member_name (method_name) || g_dbus_is_interface_name (method_name), NULL);
g_return_val_if_fail (parameters == NULL || g_variant_is_of_type (parameters, G_VARIANT_TYPE_TUPLE), NULL);
g_return_val_if_fail (timeout_msec == -1 || timeout_msec >= 0, NULL);
g_return_val_if_fail (error == NULL || *error == NULL, NULL);
was_split = maybe_split_method_name (method_name, &split_interface_name, &split_method_name);
target_method_name = was_split ? split_method_name : method_name;
target_interface_name = was_split ? split_interface_name : proxy->priv->interface_name;
if (proxy->priv->expected_interface)
{
expected_method_info = g_dbus_interface_info_lookup_method (proxy->priv->expected_interface, target_method_name);
if (!expected_method_info)
g_warning ("Trying to invoke method %s which isn't in expected interface %s",
target_method_name, target_interface_name);
}
else
{
expected_method_info = NULL;
}
ret = g_dbus_connection_call_sync (proxy->priv->connection,
proxy->priv->unique_bus_name,
proxy->priv->object_path,
target_interface_name,
target_method_name,
parameters,
flags,
timeout_msec == -1 ? proxy->priv->timeout_msec : timeout_msec,
cancellable,
error);
if (!validate_method_return (target_method_name, ret, expected_method_info, error))
{
g_variant_unref (ret);
ret = NULL;
}
g_free (split_interface_name);
return ret;
}
/* ---------------------------------------------------------------------------------------------------- */
#define __G_DBUS_PROXY_C__
#include "gioaliasdef.c"
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