See this thread on the Lua list for a current discussion about some related problems with Lua's GC and userdata.
http://lua-users.org/lists/lua-l/2008-11/msg00262.html Also note that you can tweak up the collector to make it more aggressive, but getting the right values is a trial and error process as the values of setpause and setstepmul are not simple. See the collectgarbage() function http://www.lua.org/manual/5.1/manual.html#pdf-collectgarbage wxLua already does this at startup to make it a little more frequent: // Make the GC a little more aggressive since we push void* data // that may be quite large. The upshot is that Lua runs faster. // Empirically found by timing: "for i = 1, 1E6 do local p = wx.wxPoint() end" lua_gc(L, LUA_GCSETPAUSE, 120); lua_gc(L, LUA_GCSETSTEPMUL, 400); Regards, John On Fri, Nov 14, 2008 at 12:28 PM, John Labenski <[EMAIL PROTECTED]> wrote: > On Thu, Nov 13, 2008 at 7:16 PM, Evan DeMond <[EMAIL PROTECTED]> wrote: >> Hi all, >> >> I've got a wxLua application that freezes when Lua performs garbage >> collection. I suspect that some important piece of the application is >> getting garbage collected - so I need to devise a way to tell what's getting >> garbage collected and when. The __gc metamethod was my first idea, but that >> has to be set from the C API, and can't be set from within Lua, so that >> seems out. >> >> Any other recourse I can take to figure out what's going on here? > > You cannot get the list of objects that will be GCed in the next > cycle, but you can get a complete list of wxWidgets objects that will > be garbage collected when there are no more references to them in Lua. > > Search for this word: GetTrackedWindowInfo > Here: http://wxlua.sourceforge.net/docs/wxluaref.html > > I recommend just printing them out occasionally and see if you are > collecting a lot of objects and add a call to obj:delete() to force > immediate collection. You may need to do this in "for" loops where you > may generate a lot of them since the Lua GC only runs (I may not > remember correctly) for table creation, function calls, and maybe > something else. > > You can also call collectgarbage("collect") to force collections at > the end of functions that you know generate a lot of objects that will > be garbage collected. However, I recommend being more proactive with > the :delete() function if you really are generating a lot of them. > > Hope this helps, > John > ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ wxlua-users mailing list wxlua-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wxlua-users
