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Re: port initialization?
From: |
Marius Vollmer |
Subject: |
Re: port initialization? |
Date: |
08 Aug 2002 22:31:34 +0200 |
User-agent: |
Gnus/5.09 (Gnus v5.9.0) Emacs/21.2 |
Han-Wen Nienhuys <address@hidden> writes:
> address@hidden writes:
> >> z = scm_cell (scm_tc16_strport, 0);
> >> This looks like fishy code to me. When scm_add_to_port_table triggers
> >> GC then it will see the (scm_tc16_strport, 0) cell, which is (or
> >> should be) invalid.
> >
> >Yes, but the GC will not notice since "z" still refers to it and
> >therefore the port cell wont be freedo
>
> That's not what I meant: z is a heap cell containing a null
> pointer. GC-ing it will dump core.
Sure? Closed ports do contain NULL pointers as well and the GC can
handle them just fine. The second word of a cell that is tagged as a
port is not a SCM. The GC knows that and will not try to follow it
(except when freeing a port cell but then only when it is not flagged
as closed). Am I missing somthing?
> > > SCM port = scm_cell (scm_tc16_port, newport);
> > > newport->port = port;
> > > ..
> > > }
> > /
> > This will leak newport when the call to scm_cell throws.
>
> scm_cell throws, what do you mean?
I meant, when we run out of memory. Does scm_cell signal an error
then (als scm_misc_error), or does it just abort the process?
- port initialization?, Han-Wen, 2002/08/04
- Re: port initialization?, Marius Vollmer, 2002/08/08
- Re: port initialization?, Han-Wen Nienhuys, 2002/08/08
- Re: port initialization?,
Marius Vollmer <=
- Re: port initialization?, Han-Wen Nienhuys, 2002/08/08
- Re: port initialization?, Marius Vollmer, 2002/08/08
- Re: port initialization?, Han-Wen Nienhuys, 2002/08/08
- Re: port initialization?, Marius Vollmer, 2002/08/10
- Re: port initialization?, Han-Wen Nienhuys, 2002/08/16
- Re: port initialization?, Marius Vollmer, 2002/08/16
- Re: port initialization?, Lynn Winebarger, 2002/08/08
- Re: port initialization?, Han-Wen Nienhuys, 2002/08/09
- Re: port initialization?, Marius Vollmer, 2002/08/10
- Re: port initialization?, Lynn Winebarger, 2002/08/10