Re: lua_close + IUP = crash?

[Rob Hoelz <rob@...>]

On Fri, 11 Jan 2013 08:54:51 +0100
Rob Hoelz <rob@hoelz.ro> wrote:

> On Thu, 10 Jan 2013 23:41:47 -0800 (PST)
> mbul <mbul@arqa.ru> wrote:
> 
> > Hi, 
> > my program runs Lua scripts from multiple threads. It looks like
> > this:
> > 
> > 1. 
> > In my host program:
> > 
> > ...
> > lvm1 = lua_open()
> > ...
> > lvm2 = lua_newthread()
> > ...
> > 
> > 2.
> > Start a separate OS-thread that does the following:
> > ...
> > 
> > lua_getfield (main, LUA_GLOBALSINDEX,
> > "main"); int lua_err = lua_qpcall(lvm2, main, 0, 0,
> > 0); if (lua_err)
> > 	{
> > 		script->FormatLuaErrMsg(lvm, lua_err);
> > 		return lua_err;
> > 	}
> > return 0;
> > 
> > 
> > Lua script code:
> > 
> > function main()
> > require "iuplua"
> > dlg = iup.dialog
> > {
> >   iup.vbox
> >   {
> >     iup.button{title="Button Very Long Text", size="50x"},
> >     iup.button{title="short", expand="HORIZONTAL"},
> >     iup.button{title="Mid Button", size="50x"}
> >   }
> >   ;title="IupDialog", font="Helvetica, Bold 14" 
> > }
> > 
> > -- Show the dialog and run the main loop
> > dlg:show()
> > 
> > if (not iup.MainLoopLevel or iup.MainLoopLevel()==0) then
> >   iup.MainLoop()
> > end
> > iup.Close()
> > end
> > 3.
> > When the thread is finished, the following occurs:
> > lua_close(lvm1) // lvm1 = lua_open()
> > and then an error ACCESS VIOLATION occurs. Error occurred while
> > releasing resources in Lua sources freeobj(L, curr);
> > 
> > Got any ideas?
> > 
> > 
> > 
> > 
> > 
> > 
> > --
> > View this message in context:
> > http://lua.2524044.n2.nabble.com/lua-close-IUP-crash-tp7645673.html
> > Sent from the Lua-l mailing list archive at Nabble.com.
> > 
> 
> Hi mbul,
> 
> You can't use OS threads with coroutines in Lua.  Doing so will result
> in problems like you see here.
> 
> -Rob

Also, if you want to use OS threads with Lua, here's a wiki page on
that subject: http://lua-users.org/wiki/ThreadsTutorial

You might want to ask yourself if you really need OS threads here,
though!

-Rob

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