Re: `scm_c_read ()' and `swap_buffer' trick harmful

[Neil Jerram]

2008/11/20 Ludovic Courtès <address@hidden>:
>
> In theory, yes.  In practice, the notion of "unbuffered port" is
> ill-defined, I'm afraid.  The `SCM_BUF0' flag probably can't be relied
> on, as it appears to be only really used on `fports.c'.  Actually, for
> some reason (probably copy & paste), make_cbip() creates ports with
> "SCM_OPN | SCM_RDNG | SCM_BUF0", although `SCM_BUF0' is probably not
> needed.  So I think "unbuffered port" means "read_buf_size <= 1".

That's what I was thinking too.  Please see the attached.

    Neil

0001-Make-scm_c_read-use-caller-buffer-only-for-unbuffere.patch
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