nobody at rubyforge.org
2007-Jul-04 22:50 UTC
[Wxruby-development] [1108] trunk/wxruby2/swig: Revised mem mgmt for Sizers to address more GC crashes in Sizers demo
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<title>[1108] trunk/wxruby2/swig: Revised mem mgmt for Sizers to address
more GC crashes in Sizers demo</title>
</head>
<body>
<div id="msg">
<dl>
<dt>Revision</dt> <dd>1108</dd>
<dt>Author</dt> <dd>brokentoy</dd>
<dt>Date</dt> <dd>2007-07-04 18:50:43 -0400 (Wed, 04 Jul
2007)</dd>
</dl>
<h3>Log Message</h3>
<pre>Revised mem mgmt for Sizers to address more GC crashes in Sizers
demo</pre>
<h3>Modified Paths</h3>
<ul>
<li><a
href="#trunkwxruby2swigclassesBoxSizeri">trunk/wxruby2/swig/classes/BoxSizer.i</a></li>
<li><a
href="#trunkwxruby2swigclassesFlexGridSizeri">trunk/wxruby2/swig/classes/FlexGridSizer.i</a></li>
<li><a
href="#trunkwxruby2swigclassesGridBagSizeri">trunk/wxruby2/swig/classes/GridBagSizer.i</a></li>
<li><a
href="#trunkwxruby2swigclassesGridSizeri">trunk/wxruby2/swig/classes/GridSizer.i</a></li>
<li><a
href="#trunkwxruby2swigclassesSizeri">trunk/wxruby2/swig/classes/Sizer.i</a></li>
<li><a
href="#trunkwxruby2swigclassesStaticBoxSizeri">trunk/wxruby2/swig/classes/StaticBoxSizer.i</a></li>
<li><a
href="#trunkwxruby2swigclassesStdDialogButtonSizeri">trunk/wxruby2/swig/classes/StdDialogButtonSizer.i</a></li>
<li><a
href="#trunkwxruby2swigmemory_managementi">trunk/wxruby2/swig/memory_management.i</a></li>
<li><a
href="#trunkwxruby2swigsharedsizersi">trunk/wxruby2/swig/shared/sizers.i</a></li>
<li><a
href="#trunkwxruby2swigwxi">trunk/wxruby2/swig/wx.i</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkwxruby2swigclassesBoxSizeri"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/classes/BoxSizer.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/classes/BoxSizer.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/classes/BoxSizer.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -4,14 +4,12 @@
</span><span class="cx"> %include "../common.i"
</span><span class="cx">
</span><span class="cx"> %module(directors="1")
wxBoxSizer
</span><del>-GC_MANAGE_AS_OBJECT(wxBoxSizer);
</del><ins>+GC_MANAGE_AS_SIZER(wxBoxSizer);
</ins><span class="cx">
</span><span class="cx">
</span><del>-// shared functions for GC marking
</del><ins>+// shared functions
</ins><span class="cx"> %include
"../shared/sizers.i"
</span><del>-%markfunc wxBoxSizer "mark_wxSizer";
</del><span class="cx">
</span><del>-
</del><span class="cx"> %import
"include/wxObject.h"
</span><span class="cx"> %import
"include/wxSizer.h"
</span><span class="cx">
</span></span></pre></div>
<a id="trunkwxruby2swigclassesFlexGridSizeri"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/classes/FlexGridSizer.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/classes/FlexGridSizer.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/classes/FlexGridSizer.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -4,7 +4,7 @@
</span><span class="cx"> %include "../common.i"
</span><span class="cx">
</span><span class="cx"> %module(directors="1")
wxFlexGridSizer
</span><del>-GC_MANAGE_AS_OBJECT(wxFlexGridSizer);
</del><ins>+GC_MANAGE_AS_SIZER(wxFlexGridSizer);
</ins><span class="cx">
</span><span class="cx"> %ignore
wxFlexGridSizer::GetFlexibleDirection;
</span><span class="cx"> %ignore
wxFlexGridSizer::GetNonFlexibleDirection;
</span><span class="lines">@@ -13,12 +13,9 @@
</span><span class="cx"> %ignore
wxFlexGridSizer::GetNonFlexibleGrowMode;
</span><span class="cx"> %ignore
wxFlexGridSizer::SetNonFlexibleGrowMode;
</span><span class="cx">
</span><del>-// shared functions for GC marking
</del><ins>+// shared functions
</ins><span class="cx"> %include
"../shared/sizers.i"
</span><del>-%markfunc wxBoxSizer "mark_wxSizer";
</del><span class="cx">
</span><del>-
-
</del><span class="cx"> %import
"include/wxObject.h"
</span><span class="cx"> %import
"include/wxSizer.h"
</span><span class="cx"> %import
"include/wxGridSizer.h"
</span></span></pre></div>
<a id="trunkwxruby2swigclassesGridBagSizeri"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/classes/GridBagSizer.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/classes/GridBagSizer.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/classes/GridBagSizer.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -4,17 +4,15 @@
</span><span class="cx"> %include "../common.i"
</span><span class="cx">
</span><span class="cx"> %module(directors="1")
wxGridBagSizer
</span><del>-GC_MANAGE_AS_OBJECT(wxGridBagSizer);
</del><ins>+GC_MANAGE_AS_SIZER(wxGridBagSizer);
</ins><span class="cx">
</span><span class="cx"> %{
</span><span class="cx"> #include <wx/gbsizer.h>
</span><span class="cx"> %}
</span><span class="cx">
</span><del>-// shared functions for GC marking
</del><ins>+// shared functions
</ins><span class="cx"> %include
"../shared/sizers.i"
</span><del>-%markfunc wxBoxSizer "mark_wxSizer";
</del><span class="cx">
</span><del>-
</del><span class="cx"> // ignore these for now - are they
useful?
</span><span class="cx"> // require GBSizerItem to be
wrapped
</span><span class="cx"> %ignore
wxGridBagSizer::FindItemWithData;
</span></span></pre></div>
<a id="trunkwxruby2swigclassesGridSizeri"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/classes/GridSizer.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/classes/GridSizer.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/classes/GridSizer.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -4,13 +4,11 @@
</span><span class="cx"> %include "../common.i"
</span><span class="cx">
</span><span class="cx"> %module(directors="1")
wxGridSizer
</span><del>-GC_MANAGE_AS_OBJECT(wxGridSizer);
</del><ins>+GC_MANAGE_AS_SIZER(wxGridSizer);
</ins><span class="cx">
</span><del>-// shared functions for GC marking
</del><ins>+// shared functions
</ins><span class="cx"> %include
"../shared/sizers.i"
</span><del>-%markfunc wxBoxSizer "mark_wxSizer";
</del><span class="cx">
</span><del>-
</del><span class="cx"> %import
"include/wxObject.h"
</span><span class="cx"> %import
"include/wxSizer.h"
</span><span class="cx">
</span></span></pre></div>
<a id="trunkwxruby2swigclassesSizeri"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/classes/Sizer.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/classes/Sizer.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/classes/Sizer.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -4,14 +4,13 @@
</span><span class="cx"> %include "../common.i"
</span><span class="cx">
</span><span class="cx"> %module(directors="1")
wxSizer
</span><del>-GC_MANAGE_AS_OBJECT(wxSizer);
</del><ins>+GC_MANAGE_AS_SIZER(wxSizer);
</ins><span class="cx">
</span><span class="cx"> %feature("nodirector")
wxSizer::CalcMin;
</span><span class="cx"> %ignore wxSizer::IsShown;
</span><span class="cx">
</span><del>-// shared functions for GC marking
</del><ins>+// shared functions
</ins><span class="cx"> %include
"../shared/sizers.i"
</span><del>-%markfunc wxSizer "mark_wxSizer";
</del><span class="cx">
</span><span class="cx"> %import
"include/wxObject.h"
</span><span class="cx">
</span></span></pre></div>
<a id="trunkwxruby2swigclassesStaticBoxSizeri"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/classes/StaticBoxSizer.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/classes/StaticBoxSizer.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/classes/StaticBoxSizer.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -4,11 +4,10 @@
</span><span class="cx"> %include "../common.i"
</span><span class="cx">
</span><span class="cx"> %module(directors="1")
wxStaticBoxSizer
</span><del>-GC_MANAGE_AS_OBJECT(wxStaticBoxSizer);
</del><ins>+GC_MANAGE_AS_SIZER(wxStaticBoxSizer);
</ins><span class="cx">
</span><del>-// shared functions for GC marking
</del><ins>+// shared functions
</ins><span class="cx"> %include
"../shared/sizers.i"
</span><del>-%markfunc wxStaticBoxSizer "mark_wxSizer";
</del><span class="cx">
</span><span class="cx"> // Must ensure that the C++
detach method is called, else the associated
</span><span class="cx"> // StaticBox will be double-freed
</span></span></pre></div>
<a id="trunkwxruby2swigclassesStdDialogButtonSizeri"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/classes/StdDialogButtonSizer.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/classes/StdDialogButtonSizer.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/classes/StdDialogButtonSizer.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -4,14 +4,12 @@
</span><span class="cx"> %include "../common.i"
</span><span class="cx">
</span><span class="cx"> %module(directors="1")
wxStdDialogButtonSizer
</span><del>-GC_MANAGE_AS_OBJECT(wxStdDialogButtonSizer);
</del><ins>+GC_MANAGE_AS_SIZER(wxStdDialogButtonSizer);
</ins><span class="cx">
</span><span class="cx">
</span><del>-// shared functions for GC marking
</del><ins>+// shared functions
</ins><span class="cx"> %include
"../shared/sizers.i"
</span><del>-%markfunc wxBoxSizer "mark_wxSizer";
</del><span class="cx">
</span><del>-
</del><span class="cx"> %import
"include/wxObject.h"
</span><span class="cx"> %import
"include/wxSizer.h"
</span><span class="cx"> %import
"include/wxBoxSizer.h"
</span></span></pre></div>
<a id="trunkwxruby2swigmemory_managementi"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/memory_management.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/memory_management.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/memory_management.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -75,6 +75,16 @@
</span><span class="cx"> %trackobjects;
</span><span class="cx"> %enddef
</span><span class="cx">
</span><ins>+// Sizers attached to windows are automatically
destroyed by wxWidgets,
+// so they should not be deleted.
+//
+// TODO - orphaned/unattached sizers are not automatically destroyed -
+// so the freefunc should check for this condition and do the delete if
+// required to prevent a memory leak.
+%define GC_MANAGE_AS_SIZER(kls)
+GC_NEVER(kls);
+%enddef
+
</ins><span class="cx"> // All other classes - mainly
helper classes (eg Sizer, GridCellxxx) and
</span><span class="cx"> // informational classes eg
Point, Size, Rect. These are tracked but
</span><span class="cx"> // sometimes later disowned once
passed into a widget, and thenceforth
</span></span></pre></div>
<a id="trunkwxruby2swigsharedsizersi"></a>
<div class="modfile"><h4>Modified:
trunk/wxruby2/swig/shared/sizers.i (1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/shared/sizers.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/shared/sizers.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -3,29 +3,3 @@
</span><span class="cx"> // Any nested sizers passed to
Add() in are owned by C++, not GC''d by Ruby
</span><span class="cx"> %apply SWIGTYPE *DISOWN {
wxSizer* sizer };
</span><span class="cx">
</span><del>-
-// Whilst sizers that are directly managing Windows will be marked,
-// those that are contained within other sizers need to be explicitly
-// handled:
-%{
-static void mark_wxSizer(void *ptr)
-{
- wxSizer* wx_sizer = (wxSizer*)ptr;
- wxSizerItemList& children = wx_sizer->GetChildren();
-
- // Mark each menu in the menubar in turn
- for ( wxwxSizerItemListNode *node = children.GetFirst();
-                node;
-                node
= node->GetNext() )
-        {
-        
wxSizerItem* item = node->GetData();
-        
wxSizer* child_sizer = item->GetSizer();
-         if (
child_sizer )
-                {
-                
VALUE rb_child_sizer = SWIG_RubyInstanceFor(child_sizer);
-                
rb_gc_mark(rb_child_sizer);
-                }
-        }
-}
-%}
-
</del></span></pre></div>
<a id="trunkwxruby2swigwxi"></a>
<div class="modfile"><h4>Modified: trunk/wxruby2/swig/wx.i
(1107 => 1108)</h4>
<pre class="diff"><span>
<span class="info">---
trunk/wxruby2/swig/wx.i        2007-07-04
19:32:50 UTC (rev 1107)
+++
trunk/wxruby2/swig/wx.i        2007-07-04
22:50:43 UTC (rev 1108)
</span><span class="lines">@@ -28,7 +28,34 @@
</span><span class="cx"> return (
rb_ivar_defined(rb_win, wx_destroyed_sym ) == Qtrue );
</span><span class="cx"> }
</span><span class="cx">
</span><del>-// Default mark routine for Windows - preserve sizers
</del><ins>+
+// Carries out marking of Sizer objects belonging to a Wx::Window. Note
+// that this isn''t done as a standard mark routine because ONLY sizers
+// that are known to belong to a still-alive window should be marked,
+// not those picked up as marked by in-scope variables by
+// Ruby. Otherwise, segfaults may result. Because Sizers are SWIG
+// directors, they must be preserved from GC.
+void GC_mark_SizerBelongingToWindow(wxSizer *wx_sizer)
+{
+ // First, mark this sizer
+ rb_gc_mark( SWIG_RubyInstanceFor(wx_sizer) );
+
+ // Then loop over hte sizer''s content and mark each sub-sizer in
turn
+ wxSizerItemList& children = wx_sizer->GetChildren();
+ for ( wxwxSizerItemListNode *node = children.GetFirst();
+                node;
+                node
= node->GetNext() )
+        {
+        
wxSizerItem* item = node->GetData();
+        
wxSizer* child_sizer = item->GetSizer();
+         if (
child_sizer )
+                {
GC_mark_SizerBelongingToWindow(child_sizer); }
+        }
+
+}
+
+// Default mark routine for Windows - preserve the main sizer and caret
+// belong to this window
</ins><span class="cx"> void GC_mark_wxWindow(void *ptr)
</span><span class="cx"> {
</span><span class="cx"> // can occasionally be NULL if
called in an evt_create handler
</span><span class="lines">@@ -38,9 +65,8 @@
</span><span class="cx"> wxWindow* wx_win =
(wxWindow*)ptr;
</span><span class="cx"> wxSizer* wx_sizer =
wx_win->GetSizer();
</span><span class="cx"> if ( wx_sizer )
</span><del>-        {
-         VALUE
rb_sizer = SWIG_RubyInstanceFor(wx_sizer);
-        
rb_gc_mark(rb_sizer);
</del><ins>+        {
+        
GC_mark_SizerBelongingToWindow(wx_sizer);
</ins><span class="cx">
        }
</span><span class="cx">
</span><span class="cx"> wxCaret* wx_caret =
wx_win->GetCaret();
</span><span class="lines">@@ -51,7 +77,6 @@
</span><span class="cx">
        }
</span><span class="cx"> }
</span><span class="cx">
</span><del>-
</del><span class="cx"> %}
</span><span class="cx">
</span><span class="cx"> %init %{
</span></span></pre>
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Wisdom of the Ancients
