[gvfs/wip/oholy/gtask: 55/59] proxy: Port GProxyDrive to GTask



commit 6e65eb7f7c499b831c166d9b952c2f9eb86bbc9a
Author: Ondrej Holy <oholy redhat com>
Date:   Tue Jul 26 11:40:56 2016 +0200

    proxy: Port GProxyDrive to GTask
    
    GSimpleAsyncResult is deprecated in favour of GTask and should be replaced.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=747412

 monitor/proxy/gproxydrive.c |  348 +++++++++++++++----------------------------
 1 files changed, 123 insertions(+), 225 deletions(-)
---
diff --git a/monitor/proxy/gproxydrive.c b/monitor/proxy/gproxydrive.c
index 8cb5e6a..62a16b1 100644
--- a/monitor/proxy/gproxydrive.c
+++ b/monitor/proxy/gproxydrive.c
@@ -522,18 +522,24 @@ g_proxy_drive_get_id (GProxyDrive *drive)
 }
 
 typedef struct {
-  GProxyDrive *drive;
-  GAsyncReadyCallback callback;
-  gpointer user_data;
-
   gchar *cancellation_id;
-  GCancellable *cancellable;
   gulong cancelled_handler_id;
 
   const gchar *mount_op_id;
 } DBusOp;
 
 static void
+dbus_op_free (DBusOp *data)
+{
+  g_free (data->cancellation_id);
+
+  if (data->mount_op_id)
+    g_proxy_mount_operation_destroy (data->mount_op_id);
+
+  g_free (data);
+}
+
+static void
 cancel_operation_reply_cb (GVfsRemoteVolumeMonitor *proxy,
                            GAsyncResult *res,
                            gpointer user_data)
@@ -555,23 +561,15 @@ static void
 operation_cancelled (GCancellable *cancellable,
                      gpointer      user_data)
 {
-  DBusOp *data = user_data;
-  GSimpleAsyncResult *simple;
+  GTask *task = G_TASK (user_data);
+  DBusOp *data = g_task_get_task_data (task);
   GVfsRemoteVolumeMonitor *proxy;
+  GProxyDrive *drive = G_PROXY_DRIVE (g_task_get_source_object (task));
 
   G_LOCK (proxy_drive);
 
-  simple = g_simple_async_result_new_error (G_OBJECT (data->drive),
-                                            data->callback,
-                                            data->user_data,
-                                            G_IO_ERROR,
-                                            G_IO_ERROR_CANCELLED,
-                                            _("Operation was cancelled"));
-  g_simple_async_result_complete_in_idle (simple);
-  g_object_unref (simple);
-
   /* Now tell the remote volume monitor that the op has been cancelled */
-  proxy = g_proxy_volume_monitor_get_dbus_proxy (data->drive->volume_monitor);
+  proxy = g_proxy_volume_monitor_get_dbus_proxy (drive->volume_monitor);
   gvfs_remote_volume_monitor_call_cancel_operation (proxy,
                                                     data->cancellation_id,
                                                     NULL,
@@ -580,6 +578,8 @@ operation_cancelled (GCancellable *cancellable,
   g_object_unref (proxy);
 
   G_UNLOCK (proxy_drive);
+
+  g_task_return_error_if_cancelled (task);
 }
 
 /* ---------------------------------------------------------------------------------------------------- */
@@ -589,7 +589,8 @@ eject_cb (GVfsRemoteVolumeMonitor *proxy,
           GAsyncResult *res,
           gpointer user_data)
 {
-  DBusOp *data = user_data;
+  GTask *task = G_TASK (user_data);
+  DBusOp *data = g_task_get_task_data (task);
   GError *error = NULL;
  
   gvfs_remote_volume_monitor_call_drive_eject_finish (proxy, 
@@ -597,37 +598,23 @@ eject_cb (GVfsRemoteVolumeMonitor *proxy,
                                                       &error);
 
   if (data->cancelled_handler_id > 0)
-    g_signal_handler_disconnect (data->cancellable, data->cancelled_handler_id);
+    g_signal_handler_disconnect (g_task_get_cancellable (task), data->cancelled_handler_id);
 
-  if (!g_cancellable_is_cancelled (data->cancellable))
+  if (!g_cancellable_is_cancelled (g_task_get_cancellable (task)))
     {
-      GSimpleAsyncResult *simple;
-
       if (error != NULL)
         {
           g_dbus_error_strip_remote_error (error);
-          simple = g_simple_async_result_new_from_error (G_OBJECT (data->drive),
-                                                         data->callback,
-                                                         data->user_data,
-                                                         error);
+          g_task_return_error (task, error);
+          error = NULL;
         }
       else
         {
-          simple = g_simple_async_result_new (G_OBJECT (data->drive),
-                                              data->callback,
-                                              data->user_data,
-                                              NULL);
+          g_task_return_boolean (task, TRUE);
         }
-      g_simple_async_result_complete (simple);
-      g_object_unref (simple);
     }
 
-  g_proxy_mount_operation_destroy (data->mount_op_id);
-  g_object_unref (data->drive);
-  g_free (data->cancellation_id);
-  if (data->cancellable != NULL)
-    g_object_unref (data->cancellable);
-  g_free (data);
+  g_object_unref (task);
   if (error != NULL)
     g_error_free (error);
 }
@@ -643,44 +630,39 @@ g_proxy_drive_eject_with_operation (GDrive              *drive,
   GProxyDrive *proxy_drive = G_PROXY_DRIVE (drive);
   DBusOp *data;
   GVfsRemoteVolumeMonitor *proxy;
+  GTask *task;
 
   G_LOCK (proxy_drive);
 
+  task = g_task_new (drive, cancellable, callback, user_data);
+
   if (g_cancellable_is_cancelled (cancellable))
     {
-      GSimpleAsyncResult *simple;
-      simple = g_simple_async_result_new_error (G_OBJECT (drive),
-                                                callback,
-                                                user_data,
-                                                G_IO_ERROR,
-                                                G_IO_ERROR_CANCELLED,
-                                                _("Operation was cancelled"));
-      g_simple_async_result_complete_in_idle (simple);
-      g_object_unref (simple);
       G_UNLOCK (proxy_drive);
-      goto out;
+
+      g_task_return_error_if_cancelled (task);
+      g_object_unref (task);
+      return;
     }
 
   data = g_new0 (DBusOp, 1);
-  data->drive = g_object_ref (proxy_drive);
-  data->callback = callback;
-  data->user_data = user_data;
   data->mount_op_id = g_proxy_mount_operation_wrap (mount_operation, proxy_drive->volume_monitor);
 
   if (cancellable != NULL)
     {
       data->cancellation_id = g_strdup_printf ("%p", cancellable);
-      data->cancellable = g_object_ref (cancellable);
-      data->cancelled_handler_id = g_signal_connect (data->cancellable,
+      data->cancelled_handler_id = g_signal_connect (cancellable,
                                                      "cancelled",
                                                      G_CALLBACK (operation_cancelled),
-                                                     data);
+                                                     task);
     }
   else
     {
       data->cancellation_id = g_strdup ("");
     }
 
+  g_task_set_task_data (task, data, (GDestroyNotify)dbus_op_free);
+
   proxy = g_proxy_volume_monitor_get_dbus_proxy (proxy_drive->volume_monitor);
   g_dbus_proxy_set_default_timeout (G_DBUS_PROXY (proxy), G_PROXY_VOLUME_MONITOR_DBUS_TIMEOUT);  /* 30 
minute timeout */
   
@@ -691,15 +673,12 @@ g_proxy_drive_eject_with_operation (GDrive              *drive,
                                                data->mount_op_id,
                                                NULL,
                                                (GAsyncReadyCallback) eject_cb,
-                                               data);
+                                               task);
 
   g_dbus_proxy_set_default_timeout (G_DBUS_PROXY (proxy), -1);
   g_object_unref (proxy);
 
   G_UNLOCK (proxy_drive);
-
- out:
-  ;
 }
 
 static gboolean
@@ -707,9 +686,9 @@ g_proxy_drive_eject_with_operation_finish (GDrive        *drive,
                                            GAsyncResult  *result,
                                            GError       **error)
 {
-  if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result), error))
-    return FALSE;
-  return TRUE;
+  g_return_val_if_fail (g_task_is_valid (result, drive), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
 }
 
 /* ---------------------------------------------------------------------------------------------------- */
@@ -739,7 +718,8 @@ stop_cb (GVfsRemoteVolumeMonitor *proxy,
          GAsyncResult *res,
          gpointer user_data)
 {
-  DBusOp *data = user_data;
+  GTask *task = G_TASK (user_data);
+  DBusOp *data = g_task_get_task_data (task);
   GError *error = NULL;
 
   gvfs_remote_volume_monitor_call_drive_stop_finish (proxy, 
@@ -747,37 +727,23 @@ stop_cb (GVfsRemoteVolumeMonitor *proxy,
                                                      &error);
 
   if (data->cancelled_handler_id > 0)
-    g_signal_handler_disconnect (data->cancellable, data->cancelled_handler_id);
+    g_signal_handler_disconnect (g_task_get_cancellable (task), data->cancelled_handler_id);
 
-  if (!g_cancellable_is_cancelled (data->cancellable))
+  if (!g_cancellable_is_cancelled (g_task_get_cancellable (task)))
     {
-      GSimpleAsyncResult *simple;
-
       if (error != NULL)
         {
           g_dbus_error_strip_remote_error (error);
-          simple = g_simple_async_result_new_from_error (G_OBJECT (data->drive),
-                                                         data->callback,
-                                                         data->user_data,
-                                                         error);
+          g_task_return_error (task, error);
+          error = NULL;
         }
       else
         {
-          simple = g_simple_async_result_new (G_OBJECT (data->drive),
-                                              data->callback,
-                                              data->user_data,
-                                              NULL);
+          g_task_return_boolean (task, TRUE);
         }
-      g_simple_async_result_complete (simple);
-      g_object_unref (simple);
     }
 
-  g_proxy_mount_operation_destroy (data->mount_op_id);
-  g_object_unref (data->drive);
-  g_free (data->cancellation_id);
-  if (data->cancellable != NULL)
-    g_object_unref (data->cancellable);
-  g_free (data);
+  g_object_unref (task);
   if (error != NULL)
     g_error_free (error);
 }
@@ -793,44 +759,39 @@ g_proxy_drive_stop (GDrive              *drive,
   GProxyDrive *proxy_drive = G_PROXY_DRIVE (drive);
   DBusOp *data;
   GVfsRemoteVolumeMonitor *proxy;
+  GTask *task;
 
   G_LOCK (proxy_drive);
 
+  task = g_task_new (drive, cancellable, callback, user_data);
+
   if (g_cancellable_is_cancelled (cancellable))
     {
-      GSimpleAsyncResult *simple;
-      simple = g_simple_async_result_new_error (G_OBJECT (drive),
-                                                callback,
-                                                user_data,
-                                                G_IO_ERROR,
-                                                G_IO_ERROR_CANCELLED,
-                                                _("Operation was cancelled"));
-      g_simple_async_result_complete_in_idle (simple);
-      g_object_unref (simple);
       G_UNLOCK (proxy_drive);
-      goto out;
+
+      g_task_return_error_if_cancelled (task);
+      g_object_unref (task);
+      return;
     }
 
   data = g_new0 (DBusOp, 1);
-  data->drive = g_object_ref (proxy_drive);
-  data->callback = callback;
-  data->user_data = user_data;
   data->mount_op_id = g_proxy_mount_operation_wrap (mount_operation, proxy_drive->volume_monitor);
 
   if (cancellable != NULL)
     {
       data->cancellation_id = g_strdup_printf ("%p", cancellable);
-      data->cancellable = g_object_ref (cancellable);
-      data->cancelled_handler_id = g_signal_connect (data->cancellable,
+      data->cancelled_handler_id = g_signal_connect (cancellable,
                                                      "cancelled",
                                                      G_CALLBACK (operation_cancelled),
-                                                     data);
+                                                     task);
     }
   else
     {
       data->cancellation_id = g_strdup ("");
     }
 
+  g_task_set_task_data (task, data, (GDestroyNotify)dbus_op_free);
+
   proxy = g_proxy_volume_monitor_get_dbus_proxy (proxy_drive->volume_monitor);
   g_dbus_proxy_set_default_timeout (G_DBUS_PROXY (proxy), G_PROXY_VOLUME_MONITOR_DBUS_TIMEOUT);  /* 30 
minute timeout */
 
@@ -841,15 +802,12 @@ g_proxy_drive_stop (GDrive              *drive,
                                               data->mount_op_id,
                                               NULL,
                                               (GAsyncReadyCallback) stop_cb,
-                                              data);
-  
+                                              task);
+
   g_dbus_proxy_set_default_timeout (G_DBUS_PROXY (proxy), -1);
   g_object_unref (proxy);
 
   G_UNLOCK (proxy_drive);
-
- out:
-  ;
 }
 
 static gboolean
@@ -857,72 +815,44 @@ g_proxy_drive_stop_finish (GDrive        *drive,
                            GAsyncResult  *result,
                            GError       **error)
 {
-  if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result), error))
-    return FALSE;
-  return TRUE;
+  g_return_val_if_fail (g_task_is_valid (result, drive), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
 }
 
 /* ---------------------------------------------------------------------------------------------------- */
 
-typedef struct {
-  GProxyDrive *drive;
-  GAsyncReadyCallback callback;
-  gpointer user_data;
-
-  gchar *cancellation_id;
-  GCancellable *cancellable;
-  gulong cancelled_handler_id;
-
-  const gchar *mount_op_id;
-} DBusStartOp;
-
 static void
 start_cb (GVfsRemoteVolumeMonitor *proxy,
           GAsyncResult *res,
           gpointer user_data)
 {
-  DBusStartOp *data = user_data;
+  GTask *task = G_TASK (user_data);
+  DBusOp *data = g_task_get_task_data (task);
   GError *error = NULL;
 
-  gvfs_remote_volume_monitor_call_drive_start_finish (proxy, 
-                                                      res, 
+  gvfs_remote_volume_monitor_call_drive_start_finish (proxy,
+                                                      res,
                                                       &error);
 
-if (data->cancelled_handler_id > 0)
-    g_signal_handler_disconnect (data->cancellable, data->cancelled_handler_id);
+  if (data->cancelled_handler_id > 0)
+    g_signal_handler_disconnect (g_task_get_cancellable (task), data->cancelled_handler_id);
 
-  if (!g_cancellable_is_cancelled (data->cancellable))
+  if (!g_cancellable_is_cancelled (g_task_get_cancellable (task)))
     {
-      GSimpleAsyncResult *simple;
-
       if (error != NULL)
         {
           g_dbus_error_strip_remote_error (error);
-          simple = g_simple_async_result_new_from_error (G_OBJECT (data->drive),
-                                                         data->callback,
-                                                         data->user_data,
-                                                         error);
+          g_task_return_error (task, error);
+          error = NULL;
         }
       else
         {
-          simple = g_simple_async_result_new (G_OBJECT (data->drive),
-                                              data->callback,
-                                              data->user_data,
-                                              NULL);
+          g_task_return_boolean (task, TRUE);
         }
-      g_simple_async_result_complete_in_idle (simple);
-      g_object_unref (simple);
     }
 
-  /* free DBusStartOp */
-  g_proxy_mount_operation_destroy (data->mount_op_id);
-  g_object_unref (data->drive);
-
-  g_free (data->cancellation_id);
-  if (data->cancellable != NULL)
-    g_object_unref (data->cancellable);
-
-  g_free (data);
+  g_object_unref (task);
   if (error != NULL)
     g_error_free (error);
 }
@@ -931,23 +861,15 @@ static void
 start_cancelled (GCancellable *cancellable,
                  gpointer      user_data)
 {
-  DBusStartOp *data = user_data;
-  GSimpleAsyncResult *simple;
+  GTask *task = G_TASK (user_data);
+  DBusOp *data = g_task_get_task_data (task);
   GVfsRemoteVolumeMonitor *proxy;
+  GProxyDrive *drive = G_PROXY_DRIVE (g_task_get_source_object (task));
 
   G_LOCK (proxy_drive);
 
-  simple = g_simple_async_result_new_error (G_OBJECT (data->drive),
-                                            data->callback,
-                                            data->user_data,
-                                            G_IO_ERROR,
-                                            G_IO_ERROR_CANCELLED,
-                                            _("Operation was cancelled"));
-  g_simple_async_result_complete_in_idle (simple);
-  g_object_unref (simple);
-
   /* Now tell the remote drive monitor that the op has been cancelled */
-  proxy = g_proxy_volume_monitor_get_dbus_proxy (data->drive->volume_monitor);
+  proxy = g_proxy_volume_monitor_get_dbus_proxy (drive->volume_monitor);
   gvfs_remote_volume_monitor_call_cancel_operation (proxy,
                                                     data->cancellation_id,
                                                     NULL,
@@ -956,6 +878,8 @@ start_cancelled (GCancellable *cancellable,
   g_object_unref (proxy);
 
   G_UNLOCK (proxy_drive);
+
+  g_task_return_error_if_cancelled (task);
 }
 
 static void
@@ -967,38 +891,31 @@ g_proxy_drive_start (GDrive              *drive,
                      gpointer             user_data)
 {
   GProxyDrive *proxy_drive = G_PROXY_DRIVE (drive);
-  DBusStartOp *data;
+  DBusOp *data;
   GVfsRemoteVolumeMonitor *proxy;
+  GTask *task;
 
   G_LOCK (proxy_drive);
 
+  task = g_task_new (drive, cancellable, callback, user_data);
+
   if (g_cancellable_is_cancelled (cancellable))
     {
-      GSimpleAsyncResult *simple;
-      simple = g_simple_async_result_new_error (G_OBJECT (drive),
-                                                callback,
-                                                user_data,
-                                                G_IO_ERROR,
-                                                G_IO_ERROR_CANCELLED,
-                                                _("Operation was cancelled"));
-      g_simple_async_result_complete_in_idle (simple);
-      g_object_unref (simple);
       G_UNLOCK (proxy_drive);
-      goto out;
+
+      g_task_return_error_if_cancelled (task);
+      g_object_unref (task);
+      return;
     }
 
-  data = g_new0 (DBusStartOp, 1);
-  data->drive = g_object_ref (proxy_drive);
-  data->callback = callback;
-  data->user_data = user_data;
+  data = g_new0 (DBusOp, 1);
   if (cancellable != NULL)
     {
       data->cancellation_id = g_strdup_printf ("%p", cancellable);
-      data->cancellable = g_object_ref (cancellable);
-      data->cancelled_handler_id = g_signal_connect (data->cancellable,
+      data->cancelled_handler_id = g_signal_connect (cancellable,
                                                      "cancelled",
                                                      G_CALLBACK (start_cancelled),
-                                                     data);
+                                                     task);
     }
   else
     {
@@ -1007,6 +924,8 @@ g_proxy_drive_start (GDrive              *drive,
 
   data->mount_op_id = g_proxy_mount_operation_wrap (mount_operation, proxy_drive->volume_monitor);
 
+  g_task_set_task_data (task, data, (GDestroyNotify)dbus_op_free);
+
   proxy = g_proxy_volume_monitor_get_dbus_proxy (proxy_drive->volume_monitor);
   g_dbus_proxy_set_default_timeout (G_DBUS_PROXY (proxy), G_PROXY_VOLUME_MONITOR_DBUS_TIMEOUT);  /* 30 
minute timeout */
 
@@ -1017,14 +936,12 @@ g_proxy_drive_start (GDrive              *drive,
                                                data->mount_op_id,
                                                NULL,
                                                (GAsyncReadyCallback) start_cb,
-                                               data);
+                                               task);
 
   g_dbus_proxy_set_default_timeout (G_DBUS_PROXY (proxy), -1);
   g_object_unref (proxy);
 
   G_UNLOCK (proxy_drive);
- out:
-  ;
 }
 
 static gboolean
@@ -1032,9 +949,9 @@ g_proxy_drive_start_finish (GDrive        *drive,
                             GAsyncResult  *result,
                             GError       **error)
 {
-  if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result), error))
-    return FALSE;
-  return TRUE;
+  g_return_val_if_fail (g_task_is_valid (result, drive), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
 }
 
 /* ---------------------------------------------------------------------------------------------------- */
@@ -1044,43 +961,32 @@ poll_for_media_cb (GVfsRemoteVolumeMonitor *proxy,
                    GAsyncResult *res,
                    gpointer user_data)
 {
-  DBusOp *data = user_data;
+  GTask *task = G_TASK (user_data);
+  DBusOp *data = g_task_get_task_data (task);
   GError *error = NULL;
 
   gvfs_remote_volume_monitor_call_drive_poll_for_media_finish (proxy, 
                                                                res, 
                                                                &error);
 
-  if (!g_cancellable_is_cancelled (data->cancellable))
+  if (!g_cancellable_is_cancelled (g_task_get_cancellable (task)))
     {
-      GSimpleAsyncResult *simple;
-
       if (error != NULL)
         {
           g_dbus_error_strip_remote_error (error);
-          simple = g_simple_async_result_new_from_error (G_OBJECT (data->drive),
-                                                         data->callback,
-                                                         data->user_data,
-                                                         error);
+          g_task_return_error (task, error);
+          error = NULL;
         }
       else
         {
-          simple = g_simple_async_result_new (G_OBJECT (data->drive),
-                                              data->callback,
-                                              data->user_data,
-                                              NULL);
+          g_task_return_boolean (task, TRUE);
         }
-      g_simple_async_result_complete (simple);
-      g_object_unref (simple);
     }
 
-  g_object_unref (data->drive);
-  g_free (data->cancellation_id);
   if (data->cancelled_handler_id > 0)
-    g_signal_handler_disconnect (data->cancellable, data->cancelled_handler_id);
-  if (data->cancellable != NULL)
-    g_object_unref (data->cancellable);
-  g_free (data);
+    g_signal_handler_disconnect (g_task_get_cancellable (task), data->cancelled_handler_id);
+
+  g_object_unref (task);
   if (error != NULL)
     g_error_free (error);
 }
@@ -1094,55 +1000,47 @@ g_proxy_drive_poll_for_media (GDrive              *drive,
   GProxyDrive *proxy_drive = G_PROXY_DRIVE (drive);
   DBusOp *data;
   GVfsRemoteVolumeMonitor *proxy;
+  GTask *task;
 
   G_LOCK (proxy_drive);
 
+  task = g_task_new (drive, cancellable, callback, user_data);
+
   if (g_cancellable_is_cancelled (cancellable))
     {
-      GSimpleAsyncResult *simple;
-      simple = g_simple_async_result_new_error (G_OBJECT (drive),
-                                                callback,
-                                                user_data,
-                                                G_IO_ERROR,
-                                                G_IO_ERROR_CANCELLED,
-                                                _("Operation was cancelled"));
-      g_simple_async_result_complete_in_idle (simple);
-      g_object_unref (simple);
       G_UNLOCK (proxy_drive);
-      goto out;
+
+      g_task_return_error_if_cancelled (task);
+      g_object_unref (task);
+      return;
     }
 
   data = g_new0 (DBusOp, 1);
-  data->drive = g_object_ref (proxy_drive);
-  data->callback = callback;
-  data->user_data = user_data;
-
   if (cancellable != NULL)
     {
       data->cancellation_id = g_strdup_printf ("%p", cancellable);
-      data->cancellable = g_object_ref (cancellable);
-      data->cancelled_handler_id = g_signal_connect (data->cancellable,
+      data->cancelled_handler_id = g_signal_connect (cancellable,
                                                      "cancelled",
                                                      G_CALLBACK (operation_cancelled),
-                                                     data);
+                                                     task);
     }
   else
     {
       data->cancellation_id = g_strdup ("");
     }
-  
+
+  g_task_set_task_data (task, data, (GDestroyNotify)dbus_op_free);
+
   proxy = g_proxy_volume_monitor_get_dbus_proxy (proxy_drive->volume_monitor);
   gvfs_remote_volume_monitor_call_drive_poll_for_media (proxy,
                                                         proxy_drive->id,
                                                         data->cancellation_id,
                                                         NULL,
                                                         (GAsyncReadyCallback) poll_for_media_cb,
-                                                        data);
+                                                        task);
   g_object_unref (proxy);
 
   G_UNLOCK (proxy_drive);
- out:
-  ;
 }
 
 static gboolean
@@ -1150,9 +1048,9 @@ g_proxy_drive_poll_for_media_finish (GDrive        *drive,
                                      GAsyncResult  *result,
                                      GError       **error)
 {
-  if (g_simple_async_result_propagate_error (G_SIMPLE_ASYNC_RESULT (result), error))
-    return FALSE;
-  return TRUE;
+  g_return_val_if_fail (g_task_is_valid (result, drive), FALSE);
+
+  return g_task_propagate_boolean (G_TASK (result), error);
 }
 
 /* ---------------------------------------------------------------------------------------------------- */


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