On Fri, Feb 13, 2009 at 5:43 AM, LPE <l...@f4-group.com> wrote: > With wxLua 2.8.7.0 under Windows, this code produces a crash : > > local proc = wx.wxProcess() > wx.wxExecute( "dir", wx.wxEXEC_ASYNC, proc ) > proc = nil > collectgarbage( "collect" ) > > Is there a way to prevent it?
Yes. The wxWidgets docs are a little cryptic, but I think they're trying to say that you have to connect to the event to stop wxWidgets from deleting it. See second paragraph. http://docs.wxwidgets.org/stable/wx_wxprocess.html ========================= USE_EVENT = 0 proc = wx.wxProcess() if USE_EVENT then -- Use the wxProcessEvent to stop wxWidgets from deleting proc:Connect(wx.wxEVT_END_PROCESS, function(event) print("Hello - the process is over and won't be deleted.") -- event:Skip(true) <-- will crash since wxWidgets will delete it too proc = nil collectgarbage( "collect" ) -- not necessary, but it tests the problem end) else wxlua.ungcobject(proc) -- don't let Lua GC it, wxWidgets will do it end wx.wxExecute( "dir", wx.wxEXEC_ASYNC, proc ) if not USE_EVENT then proc = nil -- force GC to delete it end collectgarbage( "collect" ) ========================= I've shown two ways to do it, with and without events. I can't think of any reasonable way that wxLua could detect that if you have Connected to the wxEVT_END_PROCESS whether you are going to call event:Skip(true/false) so there doesn't seem to be a way to make this work more elegantly. Hope this helps, John ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H _______________________________________________ wxlua-users mailing list wxlua-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wxlua-users
