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[Gcl-devel] Re: stuck

From: Camm Maguire
Subject: [Gcl-devel] Re: stuck
Date: 01 Nov 2005 12:42:41 -0500
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2


Robert Boyer <address@hidden> writes:

> I got a few socket examples to work.  Hurray for me!
> But I'd appreciate if you'd send me code for the following very simple socket
> application.  I can't seem to get IO to work at all.  And as usual, trying to
> see what processes are saying to one another while debugging is excruciatingly
> difficult.
> I'd like you to define
>    (defun in-the-background-compile-these-files (l) ...)
> to compile all the files named in the list l in separate GCLs in parallel in
> the background, sending the output for each compilation process to some text
> file based on the file name given.  No particular return value required.  No
> waiting or listening needed.  So if have a multi-core processor, I should see
> compilations running in parallel while I happily continue hacking in the
> current GCL.
> I bet this application will be of interest to many GCL users.

How about this:

(si::p-let ((a (with-open-file (s "/tmp/out1" :direction :output) 
                (let ((*standard-output* s)) 
                        (compile-file "/tmp/foo1.lsp")))) 
            (b (with-open-file (s "/tmp/out2" :direction :output) 
                (let ((*standard-output* s)) 
                (compile-file "/tmp/foo2.lsp"))))) 
        (values a b))



Don't know if we should formalize this and include it in GCL or not.
Thoughts most welcome.

Just a note -- the default standard input and standard output are
closed in the child to avoid confusion.  These are unix file
descriptors 0 and 1 (and 2 for stderr).  Other open files are shared
as with any other object in memory.  Don't know if this is a problem.
Also, we should close not unix file descriptor 0 et. al., but
*terminal-io* (I suppose).

Take care,

> Thanks,
> Bob

Camm Maguire                                            address@hidden
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah

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