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GDBusConnection: Document memory management semantics for get_property()

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Turns out we are leaking non-floating GVariant instances returned by
get_property() functions.

Also avoid imprecise language such as "newly-allocated GVariant" as
this doesn't specify whether the variant can be floating or not.

Also see https://bugzilla.gnome.org/show_bug.cgi?id=627974 as it is
very related to this change.

Signed-off-by: David Zeuthen <davidz@redhat.com>
This commit is contained in:
David Zeuthen 2010-08-25 14:45:28 -04:00
parent d31c1c863a
commit 0d0a9bb448
2 changed files with 8 additions and 2 deletions
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6
gio/gdbusconnection.c
View File

@ -3635,7 +3635,8 @@ invoke_get_property_in_idle_cb (gpointer _data)
{
g_assert_no_error (error);
g_variant_ref_sink (value);
if (g_variant_is_floating (value))
g_variant_ref_sink (value);
reply = g_dbus_message_new_method_reply (data->message);
g_dbus_message_set_body (reply, g_variant_new ("(v)", value));
g_dbus_connection_send_message (data->connection, reply, G_DBUS_SEND_MESSAGE_FLAGS_NONE, NULL, NULL);
@ -3966,10 +3967,13 @@ invoke_get_all_properties_in_idle_cb (gpointer _data)
if (value == NULL)
continue;
if (g_variant_is_floating (value))
g_variant_ref_sink (value);
g_variant_builder_add (&builder,
"{sv}",
property_info->name,
value);
g_variant_unref (value);
}
g_variant_builder_close (&builder);

4
gio/gdbusconnection.h
View File

@ -221,7 +221,9 @@ typedef void (*GDBusInterfaceMethodCallFunc) (GDBusConnection *connection,
*
* The type of the @get_property function in #GDBusInterfaceVTable.
*
* Returns: A newly-allocated #GVariant with the value for @property_name or %NULL if @error is set.
* Returns: A #GVariant with the value for @property_name or %NULL if
* @error is set. If the returned #GVariant is floating, it is
* consumed - otherwise its reference count is decreased by one.
*
* Since: 2.26
*/