From: Richard Jones <rich@annexia.org>
Cc: OCaml <caml-list@inria.fr>
Subject: Re: [Caml-list] "noalloc" + enter/leave blocking section - safe?
Date: Mon, 2 Aug 2004 17:02:32 +0100 [thread overview]
Message-ID: <20040802160231.GA5067@annexia.org> (raw)
In-Reply-To: <87wu0hmtem.fsf@informatik.uni-tuebingen.de>
On Mon, Aug 02, 2004 at 05:49:53PM +0200, Falk Hueffner wrote:
> Jere Sanisalo <xm@xmunkki.org> writes:
>
> > On Mon, Aug 02, 2004 at 05:15:02PM +0200, Markus Mottl wrote:
> >>---------------------------------------------------------------------------
> >>external foo : 'a -> unit = "foo_stub" "noalloc"
> >
> > Hmm, I wasn't aware that there was a "noalloc" directive. What does
> > it specifically declare? Does it make ocaml call the natives in a
> > more efficient manner (and of course the function must not allocate
> > anything)?
>
> It calls the C function directly, with zero overhead. Otherwise, the
> call goes through "caml_c_call", which puts the GC state into global
> variables for C to pick up, and restores it later from there.
>
> > Are there any other directives I should be aware of?
>
> There's "float", which means the function works on unboxed floats.
Cool features!
Rich.
--
Richard Jones. http://www.annexia.org/ http://www.j-london.com/
Merjis Ltd. http://www.merjis.com/ - improving website return on investment
PTHRLIB is a library for writing small, efficient and fast servers in C.
HTTP, CGI, DBI, lightweight threads: http://www.annexia.org/freeware/pthrlib/
-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
next prev parent reply other threads:[~2004-08-02 16:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-08-02 10:43 Markus Mottl
2004-08-02 15:15 ` Markus Mottl
2004-08-02 15:34 ` Jere Sanisalo
2004-08-02 15:49 ` Falk Hueffner
2004-08-02 16:02 ` Richard Jones [this message]
2004-08-02 16:32 ` Markus Mottl
2004-08-02 16:39 ` Falk Hueffner
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040802160231.GA5067@annexia.org \
--to=rich@annexia.org \
--cc=caml-list@inria.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).