[gnome-bluetooth/wip/hadess/no-sync-calls] lib: Remove last sync call

[Bastien Nocera <hadess src gnome org>]

commit b0e03b321a227644847e8febf66dbf6e54c37ae9
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Dec 6 14:21:07 2021 +0100

    lib: Remove last sync call
    
    Remove the last synchronous call in BluetoothClient.

 lib/bluetooth-client.c | 59 +++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 53 insertions(+), 6 deletions(-)
---
diff --git a/lib/bluetooth-client.c b/lib/bluetooth-client.c
index d6b5e7b6..d73eb4bc 100644
--- a/lib/bluetooth-client.c
+++ b/lib/bluetooth-client.c
@@ -759,6 +759,41 @@ _bluetooth_client_get_default_adapter(BluetoothClient *client)
        return G_DBUS_PROXY (g_object_ref (client->default_adapter));
 }
 
+static void
+set_discovery_filter_cb (Adapter1     *adapter,
+                        GAsyncResult *res,
+                        gpointer      user_data)
+{
+       g_autoptr(GError) error = NULL;
+       gboolean ret;
+
+       ret = adapter1_call_set_discovery_filter_finish (adapter, res, &error);
+       if (!ret) {
+               g_debug ("Error calling SetDiscoveryFilter()  on interface org.bluez.Adapter1: %s (%s, %d)",
+                        error->message, g_quark_to_string (error->domain), error->code);
+       }
+}
+
+static void
+discovery_cb (Adapter1     *adapter,
+             GAsyncResult *res,
+             gpointer      user_data)
+{
+       g_autoptr(GError) error = NULL;
+       gboolean ret;
+       gboolean start_call = GPOINTER_TO_UINT (user_data);
+
+       if (start_call)
+               ret = adapter1_call_start_discovery_finish (adapter, res, &error);
+       else
+               ret = adapter1_call_stop_discovery_finish (adapter, res, &error);
+       if (!ret) {
+               g_debug ("Error calling %s  on interface org.bluez.Adapter1: %s (%s, %d)",
+                        start_call ? "StartDiscovery()" : "StopDiscovery()",
+                        error->message, g_quark_to_string (error->domain), error->code);
+       }
+}
+
 static void
 _bluetooth_client_set_default_adapter_discovering (BluetoothClient *client,
                                                   gboolean         discovering)
@@ -774,15 +809,27 @@ _bluetooth_client_set_default_adapter_discovering (BluetoothClient *client,
                g_variant_builder_init (&builder, G_VARIANT_TYPE_VARDICT);
                g_variant_builder_add (&builder, "{sv}",
                                       "Discoverable", g_variant_new_boolean (TRUE));
-               adapter1_call_set_discovery_filter_sync (ADAPTER1 (adapter),
-                                                        g_variant_builder_end (&builder), NULL, NULL);
+               adapter1_call_set_discovery_filter (ADAPTER1 (adapter),
+                                                   g_variant_builder_end (&builder),
+                                                   client->cancellable,
+                                                   (GAsyncReadyCallback) set_discovery_filter_cb,
+                                                   client);
        }
 
        client->discovery_started = discovering;
-       if (discovering)
-               adapter1_call_start_discovery (ADAPTER1 (adapter), NULL, NULL, NULL);
-       else
-               adapter1_call_stop_discovery (ADAPTER1 (adapter), NULL, NULL, NULL);
+       if (discovering) {
+               adapter1_call_start_discovery (ADAPTER1 (adapter),
+                                              client->cancellable,
+                                              (GAsyncReadyCallback) discovery_cb,
+                                              GUINT_TO_POINTER (discovering));
+       } else {
+               /* Don't cancel a dicovery stop when the BluetoothClient
+                * is finalised, so don't pass a cancellable */
+               adapter1_call_stop_discovery (ADAPTER1 (adapter),
+                                             NULL,
+                                             (GAsyncReadyCallback) discovery_cb,
+                                             GUINT_TO_POINTER (discovering));
+       }
 }
 
 static void