gio: handle GSimpleAsyncResult errors in _finish vmethods

Originally, the standard idiom with GSimpleAsyncResult was to handle
all errors in the _finish wrapper function, so that vmethods only had
to deal with successful results. But this means that chaining up to a
parent _finish vmethod won't work correctly. Fix this by also checking
for errors in all the relevant vmethods. (We have to redundantly check
in both the vmethod and the wrapper to preserve compatibility.)

https://bugzilla.gnome.org/show_bug.cgi?id=667375
https://bugzilla.gnome.org/show_bug.cgi?id=661767

gio/gasyncinitable.c

@@ -294,18 +294,15 @@ g_async_initable_real_init_finish (GAsyncInitable  *initable,
 				   GAsyncResult    *res,
 				   GError         **error)
 {
-  /* Although g_async_initable_init_finish() does this error handling
+  GSimpleAsyncResult *simple;
-   * as well, we do it here too, so that a class that reimplements
+
-   * GAsyncInitable can properly run its parent class's implementation
+  g_return_val_if_fail (g_simple_async_result_is_valid (res, G_OBJECT (initable),
-   * by directly invoking its ->init_async() and ->init_finish().
+							g_async_initable_real_init_async),
-   */
+			FALSE);
-  if (G_IS_SIMPLE_ASYNC_RESULT (res))
+
-    {
+  simple = G_SIMPLE_ASYNC_RESULT (res);
-      GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
   if (g_simple_async_result_propagate_error (simple, error))
     return FALSE;
-    }
-
   return TRUE;
 }
 

gio/gbufferedinputstream.c

@@ -1131,6 +1131,9 @@ g_buffered_input_stream_real_fill_finish (GBufferedInputStream *stream,
   simple = G_SIMPLE_ASYNC_RESULT (result);
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_buffered_input_stream_real_fill_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return -1;
+
   nread = g_simple_async_result_get_op_res_gssize (simple);
   return nread;
 }

gio/gfile.c

@@ -4889,6 +4889,9 @@ g_file_real_query_info_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_query_info_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
   if (data->info)
     return g_object_ref (data->info);
@@ -4960,6 +4963,9 @@ g_file_real_query_filesystem_info_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_query_filesystem_info_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
   if (data->info)
     return g_object_ref (data->info);
@@ -5034,6 +5040,9 @@ g_file_real_enumerate_children_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_enumerate_children_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
   if (data->enumerator)
     return g_object_ref (data->enumerator);
@@ -5096,6 +5105,9 @@ g_file_real_read_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_read_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
   if (op)
     return g_object_ref (op);
@@ -5156,6 +5168,9 @@ g_file_real_append_to_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_append_to_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
   if (op)
     return g_object_ref (op);
@@ -5216,6 +5231,9 @@ g_file_real_create_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_create_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
   if (op)
     return g_object_ref (op);
@@ -5301,6 +5319,9 @@ g_file_real_replace_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_replace_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
   if (data->stream)
     return g_object_ref (data->stream);
@@ -5363,6 +5384,9 @@ g_file_real_open_readwrite_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_open_readwrite_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
   if (op)
     return g_object_ref (op);
@@ -5434,6 +5458,9 @@ g_file_real_create_readwrite_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_create_readwrite_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
   if (op)
     return g_object_ref (op);
@@ -5519,6 +5546,9 @@ g_file_real_replace_readwrite_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_replace_readwrite_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
   if (data->stream)
     return g_object_ref (data->stream);
@@ -5590,6 +5620,9 @@ g_file_real_set_display_name_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_set_display_name_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
   if (data->file)
     return g_object_ref (data->file);
@@ -5717,6 +5750,9 @@ g_file_real_find_enclosing_mount_finish (GFile         *file,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_real_find_enclosing_mount_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   mount = g_simple_async_result_get_op_res_gpointer (simple);
   return g_object_ref (mount);
 }
@@ -5840,7 +5876,11 @@ g_file_real_copy_finish (GFile        *file,
 			 GAsyncResult *res,
 			 GError      **error)
 {
-  /* Error handled in g_file_copy_finish() */
+  GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (res);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return FALSE;
+
   return TRUE;
 }
 

gio/gfileenumerator.c

@@ -693,6 +693,9 @@ g_file_enumerator_real_next_files_finish (GFileEnumerator                *enumer
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == 
 	    g_file_enumerator_real_next_files_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
 
   res = op->files;
@@ -750,7 +753,12 @@ g_file_enumerator_real_close_finish (GFileEnumerator  *enumerator,
                                      GError          **error)
 {
   GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
+
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == 
 	    g_file_enumerator_real_close_async);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return FALSE;
+
   return TRUE;
 }

gio/gfileinputstream.c

@@ -456,6 +456,9 @@ g_file_input_stream_real_query_info_finish (GFileInputStream  *stream,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_input_stream_real_query_info_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
   if (data->info)
     return g_object_ref (data->info);

gio/gfileoutputstream.c

@@ -559,6 +559,9 @@ g_file_output_stream_real_query_info_finish (GFileOutputStream     *stream,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_file_output_stream_real_query_info_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
   if (data->info)
     return g_object_ref (data->info);

gio/ginputstream.c

@@ -1227,6 +1227,9 @@ g_input_stream_real_read_finish (GInputStream  *stream,
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == 
 	    g_input_stream_real_read_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return -1;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
 
   return op->count_read;
@@ -1378,6 +1381,10 @@ g_input_stream_real_skip_finish (GInputStream  *stream,
   SkipData *op;
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_input_stream_real_skip_async);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return -1;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
   return op->count_skipped;
 }
@@ -1434,6 +1441,11 @@ g_input_stream_real_close_finish (GInputStream  *stream,
 				  GError       **error)
 {
   GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
+
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_input_stream_real_close_async);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return FALSE;
+
   return TRUE;
 }

gio/giostream.c

@@ -588,8 +588,13 @@ g_io_stream_real_close_finish (GIOStream     *stream,
 			       GError       **error)
 {
   GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
+
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) ==
 		  g_io_stream_real_close_async);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return FALSE;
+
   return TRUE;
 }
 

gio/gloadableicon.c

@@ -229,6 +229,9 @@ g_loadable_icon_real_load_finish (GLoadableIcon        *icon,
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_loadable_icon_real_load_async);
 
+  if (g_simple_async_result_propagate_error (simple, error))
+    return NULL;
+
   data = g_simple_async_result_get_op_res_gpointer (simple);
 
   if (type)

gio/goutputstream.c

@@ -1546,6 +1546,10 @@ g_output_stream_real_write_finish (GOutputStream  *stream,
   WriteData *op;
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_output_stream_real_write_async);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return -1;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
   return op->count_written;
 }
@@ -1613,6 +1617,10 @@ g_output_stream_real_splice_finish (GOutputStream  *stream,
   SpliceData *op;
 
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_output_stream_real_splice_async);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return -1;
+
   op = g_simple_async_result_get_op_res_gpointer (simple);
   return op->bytes_copied;
 }
@@ -1656,6 +1664,10 @@ g_output_stream_real_flush_finish (GOutputStream  *stream,
                                    GAsyncResult   *result,
                                    GError        **error)
 {
+  GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return FALSE;
   return TRUE;
 }
 
@@ -1720,6 +1732,10 @@ g_output_stream_real_close_finish (GOutputStream  *stream,
                                    GError        **error)
 {
   GSimpleAsyncResult *simple = G_SIMPLE_ASYNC_RESULT (result);
+
   g_warn_if_fail (g_simple_async_result_get_source_tag (simple) == g_output_stream_real_close_async);
+
+  if (g_simple_async_result_propagate_error (simple, error))
+    return FALSE;
   return TRUE;
 }