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Bug 623143 – Never require non-closed connections

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There's a couple of places in GDBus where it's a programming error
(e.g. we'll assert or spew via e.g. g_warning()) to use the API on a
closed connection.  This approach can never work since a
GDBusConnection can be closed at any point in time outside of
programmer control.

Just change the code to return a run-time error (e.g. return
G_IO_ERROR_CLOSED when sending messages, invoking methods) or silently
accept the request (e.g.  exporting objects, registering for signals)
without doing anything.

Note that a GDBusConnection object is always useless after being
closed - e.g.  there's no way to "reopen" a connection - the user will
have to create a new object and use that instead.

https://bugzilla.gnome.org/show_bug.cgi?id=623143

Signed-off-by: David Zeuthen <davidz@redhat.com>
This commit is contained in:
David Zeuthen 2010-06-29 15:19:56 -04:00
parent ab6b6c68c5
commit 6d4ade4cf0
3 changed files with 4 additions and 10 deletions
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5
gio/gdbusconnection.c
View File

@ -2574,9 +2574,6 @@ is_signal_data_for_name_lost_or_acquired (SignalData *signal_data)
* linkend="g-main-context-push-thread-default">thread-default main
* loop</link> of the thread you are calling this method from.
*
* It is considered a programming error to use this function if
* @connection is closed.
*
* If @connection is not a message bus connection, @sender must be
* %NULL.
*
@ -2619,7 +2616,6 @@ g_dbus_connection_signal_subscribe (GDBusConnection *connection,
*/
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
g_return_val_if_fail (!g_dbus_connection_is_closed (connection), 0);
g_return_val_if_fail (sender == NULL || (g_dbus_is_name (sender) && (connection->priv->flags & G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION)), 0);
g_return_val_if_fail (interface_name == NULL || g_dbus_is_interface_name (interface_name), 0);
g_return_val_if_fail (member == NULL || g_dbus_is_member_name (member), 0);
@ -4096,7 +4092,6 @@ g_dbus_connection_register_object (GDBusConnection *connection,
guint ret;
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
g_return_val_if_fail (!g_dbus_connection_is_closed (connection), 0);
g_return_val_if_fail (object_path != NULL && g_variant_is_object_path (object_path), 0);
g_return_val_if_fail (introspection_data != NULL, 0);
g_return_val_if_fail (g_dbus_is_interface_name (introspection_data->name), 0);

5
gio/gdbusnameowning.c
View File

@ -450,7 +450,7 @@ connection_get_cb (GObject *source_object,
/**
* g_bus_own_name_on_connection:
* @connection: A #GDBusConnection that is not closed.
* @connection: A #GDBusConnection.
* @name: The well-known name to own.
* @flags: A set of flags from the #GBusNameOwnerFlags enumeration.
* @name_acquired_handler: Handler to invoke when @name is acquired or %NULL.
@ -478,7 +478,6 @@ g_bus_own_name_on_connection (GDBusConnection *connection,
Client *client;
g_return_val_if_fail (G_IS_DBUS_CONNECTION (connection), 0);
g_return_val_if_fail (!g_dbus_connection_is_closed (connection), 0);
g_return_val_if_fail (g_dbus_is_name (name) && !g_dbus_is_unique_name (name), 0);
G_LOCK (lock);
@ -766,7 +765,7 @@ g_bus_own_name_with_closures (GBusType bus_type,
/**
* g_bus_own_name_on_connection_with_closures:
* @connection: A #GDBusConnection that is not closed.
* @connection: A #GDBusConnection.
* @name: The well-known name to own.
* @flags: A set of flags from the #GBusNameOwnerFlags enumeration.
* @name_acquired_closure: (allow-none): #GClosure to invoke when @name is

4
gio/gdbusnamewatching.c
View File

@ -590,7 +590,7 @@ g_bus_watch_name (GBusType bus_type,
/**
* g_bus_watch_name_on_connection:
* @connection: A #GDBusConnection that is not closed.
* @connection: A #GDBusConnection.
* @name: The name (well-known or unique) to watch.
* @flags: Flags from the #GBusNameWatcherFlags enumeration.
* @name_appeared_handler: Handler to invoke when @name is known to exist or %NULL.
@ -761,7 +761,7 @@ g_bus_watch_name_with_closures (GBusType bus_type,
/**
* g_bus_watch_name_on_connection_with_closures:
* @connection: A #GDBusConnection that is not closed.
* @connection: A #GDBusConnection.
* @name: The name (well-known or unique) to watch.
* @flags: Flags from the #GBusNameWatcherFlags enumeration.
* @name_appeared_closure: (allow-none): #GClosure to invoke when @name is known