[Openmcl-devel] make-fd-stream

julian at cipht.net julian at cipht.net
Sun Sep 25 22:44:13 UTC 2005


On Sun, Sep 25, 2005 at 01:42:13PM -0600, Gary Byers wrote:
> CCL::MAKE-FD-STREAM creates a Gray stream; all streams in OpenMCL are
> Gray streams, and STREAMP returns T when applied to any of them.
> (This has nothing to do with CMUCL's fd-streams as I remember them; it
> happens to be the case that many interestring subclasses of STREAM -
> including file streams and network sockets - operate on file
> descriptors, and CCL::MAKE-FD-STREAM handles many of the buffer
> creation and other details that're common to those classes.

Ah, my mistake.  I was testing the source of my problem incorrectly.
Indeed, I do get a stream back, but when I try to seek in it with
FILE-POSITION, I get:

> Error in process listener(1): value #<FD-CHARACTER-IO-STREAM (FILE/4)
> #x3547EB06> is not of the expected type STREAM.
> While executing: #<CCL::STANDARD-KERNEL-METHOD CCL::STREAM-POSITION
> (T)>

I guess that the streams returned by MAKE-FD-STREAM aren't seekable?
Please excuse my cluelessness on this matter.

> (I wasn't planning on changing CCL::MAKE-FD-STREAM, either.)

Good to know.

Thanks.

-- 
Julian Squires



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