proxy: throw an error if the proxy is destroyed during async constructions

lib/wp/proxy-node.c

@@ -6,6 +6,7 @@
  * SPDX-License-Identifier: MIT
  */
 
+#include "error.h"
 #include "proxy-node.h"
 #include <pipewire/pipewire.h>
 
@@ -15,7 +16,7 @@ struct _WpProxyNode
 
   /* The task to signal the proxy is initialized */
   GTask *init_task;
-  
+
   /* The node proxy listener */
   struct spa_hook listener;
 
@@ -69,6 +70,22 @@ wp_proxy_node_finalize (GObject * object)
   G_OBJECT_CLASS (wp_proxy_node_parent_class)->finalize (object);
 }
 
+static void
+wp_proxy_node_destroy (WpProxy * proxy)
+{
+  WpProxyNode *self = WP_PROXY_NODE(proxy);
+  GError *error = NULL;
+
+  /* Return error if the pipewire destruction happened while the async creation
+   * of this proxy node object has not finished */
+  if (self->init_task) {
+    g_set_error (&error, WP_DOMAIN_LIBRARY, WP_LIBRARY_ERROR_OPERATION_FAILED,
+        "pipewire node proxy destroyed before finishing");
+    g_task_return_error (self->init_task, error);
+    g_clear_object (&self->init_task);
+  }
+}
+
 static void
 wp_proxy_node_init_async (GAsyncInitable *initable, int io_priority,
     GCancellable *cancellable, GAsyncReadyCallback callback, gpointer data)
@@ -105,8 +122,11 @@ static void
 wp_proxy_node_class_init (WpProxyNodeClass * klass)
 {
   GObjectClass *object_class = (GObjectClass *) klass;
+  WpProxyClass *proxy_class = (WpProxyClass *) klass;
 
   object_class->finalize = wp_proxy_node_finalize;
+
+  proxy_class->destroy = wp_proxy_node_destroy;
 }
 
 void