gio: Mark the source_object argument to the ThreadedSocketService::ru…

…n as nullable

Just like everywhere else.

Fixes gtk-rs/gio#300

Gir.toml

@@ -102,7 +102,6 @@ generate = [
     "Gio.SrvTarget",
     "Gio.SubprocessFlags",
     "Gio.TcpConnection",
-    "Gio.ThreadedSocketService",
     "Gio.TlsAuthenticationMode",
     "Gio.TlsCertificate",
     "Gio.TlsCertificateFlags",
@@ -805,6 +804,15 @@ status = "generate"
     # ConstructOnly
     generate = ["notify"]
 
+[[object]]
+name = "Gio.ThreadedSocketService"
+status = "generate"
+    [[object.signal]]
+    name = "run"
+        [[object.signal.parameter]]
+        name = "source_object"
+        nullable = true
+
 [[object]]
 name = "Gio.TlsPassword"
 status = "generate"

src/auto/threaded_socket_service.rs

@@ -42,7 +42,7 @@ pub const NONE_THREADED_SOCKET_SERVICE: Option<&ThreadedSocketService> = None;
 pub trait ThreadedSocketServiceExt: 'static {
     fn get_property_max_threads(&self) -> i32;
 
-    fn connect_run<F: Fn(&Self, &SocketConnection, &glib::Object) -> bool + 'static>(
+    fn connect_run<F: Fn(&Self, &SocketConnection, Option<&glib::Object>) -> bool + 'static>(
         &self,
         f: F,
     ) -> SignalHandlerId;
@@ -64,13 +64,13 @@ impl<O: IsA<ThreadedSocketService>> ThreadedSocketServiceExt for O {
         }
     }
 
-    fn connect_run<F: Fn(&Self, &SocketConnection, &glib::Object) -> bool + 'static>(
+    fn connect_run<F: Fn(&Self, &SocketConnection, Option<&glib::Object>) -> bool + 'static>(
         &self,
         f: F,
     ) -> SignalHandlerId {
         unsafe extern "C" fn run_trampoline<
             P,
-            F: Fn(&P, &SocketConnection, &glib::Object) -> bool + 'static,
+            F: Fn(&P, &SocketConnection, Option<&glib::Object>) -> bool + 'static,
         >(
             this: *mut gio_sys::GThreadedSocketService,
             connection: *mut gio_sys::GSocketConnection,
@@ -84,7 +84,9 @@ impl<O: IsA<ThreadedSocketService>> ThreadedSocketServiceExt for O {
             f(
                 &ThreadedSocketService::from_glib_borrow(this).unsafe_cast_ref(),
                 &from_glib_borrow(connection),
-                &from_glib_borrow(source_object),
+                Option::<glib::Object>::from_glib_borrow(source_object)
+                    .as_ref()
+                    .as_ref(),
             )
             .to_glib()
         }