From: Till Varoquaux <till@pps.jussieu.fr>
To: Florent Monnier <monnier.florent@gmail.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] caml_copy_string
Date: Tue, 24 Aug 2010 10:52:48 -0400 [thread overview]
Message-ID: <AANLkTi=X5_dgmjtyH8A=rOfHELigTkdZ_W3iw4PfkzHL@mail.gmail.com> (raw)
In-Reply-To: <201008241621.02363.monnier.florent@gmail.com>
On Tue, Aug 24, 2010 at 10:21 AM, Florent Monnier
<monnier.florent@gmail.com> wrote:
> Le lundi 23 août 2010 22:24:48, Romain Beauxis a écrit :
>> Le lundi 23 août 2010 07:09:05, Florent Monnier a écrit :
>> > an alternative method is to provide a string from ocaml to c then c fills
>> > this buffer, then you can save allocations by reusing the same buffer,
>>
>> > see:
>> This is a good idea but I would be a little bit suspicious about using
>> "noalloc". Even if it works in your tests, this options is very delicate to
>> use with the Gc, and may segfault in some cases.
>
> could you develop? which cases?
IIRC noalloc calls release the ocaml lock. This means that the runtime
can run at the same time as the c call and the GC migh collect your
string or move it along. Quick rule if thumb is: you are allocating
your string so you should not use noalloc.
Till
>
>
> --
> Regards
> Florent
>
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next prev parent reply other threads:[~2010-08-24 14:52 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-21 23:30 caml_copy_string Jeffrey Barber
2010-08-21 23:42 ` [Caml-list] caml_copy_string Romain Beauxis
2010-08-21 23:46 ` Mathias Kende
2010-08-22 17:16 ` Till Varoquaux
2010-08-23 0:42 ` Till Varoquaux
2010-08-23 1:02 ` Jeffrey Barber
2010-08-23 12:09 ` Florent Monnier
2010-08-23 12:59 ` Stéphane Glondu
2010-08-23 13:46 ` Florent Monnier
2010-08-23 20:24 ` Romain Beauxis
2010-08-24 14:21 ` Florent Monnier
2010-08-24 14:52 ` Till Varoquaux [this message]
2010-08-24 15:22 ` Anil Madhavapeddy
2010-08-24 15:35 ` Romain Beauxis
2010-08-25 19:16 ` Florent Monnier
2010-08-25 19:33 ` Romain Beauxis
2010-08-25 15:21 ` Goswin von Brederlow
-- strict thread matches above, loose matches on Subject: below --
2005-10-29 0:24 Jonathan Roewen
2005-10-29 0:32 ` Robert Roessler
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