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Correctly unref widget_nodes 

While drawing the wibox, the C core builds up a list of widgets and their
associated geometry. This list consists of widget_node_t objects and is
constructed like this (This is from luaA_table2widgets()):

   widget_node_t w;
   p_clear(&w, 1);
   w.widget = luaA_object_ref_item(L, idx, -1);
   widget_node_array_append(widgets, w);

After we are done with this list of widget nodes, it is freed via
wibox_widget_node_array_wipe(). However, wibox_widget_node_array_wipe() passed
"&w" to luaA_object_unref_item() while it should have used "w.widget" (which is
what was returned from luaA_object_ref_item()). This made the unref fail and the
wibox was carrying around a reference to this widget forever. This was
effectively a memory leak.

Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit is contained in:
Uli Schlachter 2010-09-17 15:45:24 +02:00
parent 71b15d292c
commit 0a7bec1dbb
1 changed files with 1 additions and 1 deletions
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2
objects/wibox.c
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@ -94,7 +94,7 @@ wibox_widget_node_array_wipe(lua_State *L, int idx)
{
wibox_t *wibox = luaA_checkudata(L, idx, &wibox_class);
foreach(widget_node, wibox->widgets)
luaA_object_unref_item(globalconf.L, idx, widget_node);
luaA_object_unref_item(globalconf.L, idx, widget_node->widget);
widget_node_array_wipe(&wibox->widgets);
}