From: nobu.nokada@...
Date: 2003-03-17T09:22:07+09:00
Subject: Re: method call on terminated object [W2k,1.6.8}

Hi,

At Mon, 17 Mar 2003 04:39:39 +0900,
Michael Bruschkewitz wrote:
> > > conn.read calls the following function from an own extension:		
> > > 	VALUE TCP_Read(VALUE self, VALUE maxL) 	{
> > > 		CRbTcp* p; Data_Get_Struct(self, CRbTcp, p);
> > > 		int ml = NUM2INT(maxL);		
> > > 		std::string data;
> > > 		try { data=p->Read(ml); }
> > > 		catch(CRbException & e) { 
> > > 			ext_raise(self,e.str(),__FILE__,__LINE__); }
> > > 		return rb_str_new(data.data(),data.size());
> > > 	}
> > 
> > Perhaps, you should check if you mark ruby objects properly.
> 
> Just to be sure, for my problem:
> class TC ; def initialize ; @s = '' ; end ; end
> $tc = Testcase.new
> # from here, tc.s should be valid (and never be terminated) until ...
> $tc = nil
> # ... here (after next GC)?

Yes.

> Is it possible $tc is not marked because it is assigned inside tc1.rb 
> here:
> 	load 'tc1.rb' # tc1.rb: $tc = TC.new

Global variables are always marked.

> If I do not hold any references to Ruby objects inside my C++-classes, 
> do I still need to handle the mark-pass of GC?

No, it should not be.

> (rather, C++ objects are held inside TC-member variables)

Do you mean an instance variable of ruby object (TC) holds raw
C++ object?

-- 
Nobu Nakada