I tried to test for memory leaks of the high level GTK3 bindings.
import gtk, glib, gobject
proc initWithArgv*() =
var
cmdLine{.importc.}: cstringArray
cmdCount{.importc.}: cint
gtk.gtk_init(cmdCount, cmdLine)
proc xadd*(self: Container; widget: Widget) =
discard
proc main() =
initWithArgv()
var window: Window = newWindow()
var
box = newBox(Orientation.vertical, 0)
button2 = newButton("Wrapper")
window.add(box)
#box.xadd(button2)
window.showAll
button2 = nil
GC_fullCollect()
gtk.gtkMain()
main()
The surprising observation is: With line #box.xadd(button2) commented out I get
message "finalizeGObject" immediately after program startup as expected.
Expected because newButton() calls new() with a finalizer proc, and when I set
the button2 ref to nil and call GC_fullCollect() I would expect that finalizer
to be called. But when I uncomment #box.xadd(button2), so that call is
performed, then the finalizer is not called! Diff for the c code is
diff /tmp/home/stefan/nimgir/nim_gi/t1.c t1.c
201c201,203
< WidgetcolonObjectType__lBhQvK9csISM5sR8bgaX2Yw* T3_;
---
> ContainercolonObjectType__U9bNkp3ITqibAfZmdNgz6Fg* T3_;
> WidgetcolonObjectType__lBhQvK9csISM5sR8bgaX2Yw* T4_;
> WidgetcolonObjectType__lBhQvK9csISM5sR8bgaX2Yw* T5_;
216a219,224
> nimln_(20, "t1.nim");
> T3_ = (ContainercolonObjectType__U9bNkp3ITqibAfZmdNgz6Fg*)0;
> T3_ = &box->Sup;
> T4_ = (WidgetcolonObjectType__lBhQvK9csISM5sR8bgaX2Yw*)0;
> T4_ = &button2->Sup.Sup.Sup;
> xadd_CSJDajTMVqA4FK5tE4Bzgg(T3_, T4_);
218,220c226,228
< T3_ = (WidgetcolonObjectType__lBhQvK9csISM5sR8bgaX2Yw*)0;
< T3_ = &window->Sup.Sup.Sup;
< showAll_lXhLwQ78AtCsaeIEOagh9bA(T3_);
---
> T5_ = (WidgetcolonObjectType__lBhQvK9csISM5sR8bgaX2Yw*)0;
> T5_ = &window->Sup.Sup.Sup;
> showAll_lXhLwQ78AtCsaeIEOagh9bA(T5_);
Is that the desired behaviour? I don't know how GC is performed in detail, may
the temporary variables in the C code prevent GC?
