From: Goswin von Brederlow <goswin-v-b@web.de>
To: lyn HONG <lynxiamen@gmail.com>
Cc: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] What should the "size" in "caml_alloc_custom" be?
Date: Tue, 18 May 2010 08:58:00 +0200 [thread overview]
Message-ID: <87aarxitmv.fsf@frosties.localdomain> (raw)
In-Reply-To: <AANLkTili-4GYDQeFLHV68B08GLio_SLRG9FCTbUpyCOD@mail.gmail.com> (lyn HONG's message of "Mon, 17 May 2010 14:00:28 -0400")
lyn HONG <lynxiamen@gmail.com> writes:
> Hi all,
>
> I have a question about "allocating custom blocks" in "iterfacing C with object
> Ocaml". when we call function "caml_alloc_custom(ops, size, used, max)" in the
> C side, if the structure we want to allocate has a pointer, is the "size"
> going to be size of the structure itself only, or should we also include the
> memory block that pointer points to?
>
> Thanks,
> Lin
The size is the number of ocaml words in the structure itself. The
pointer then points outside the ocaml heap to some C memory allocated by
malloc(). You should account for that size in the used/max pair.
MfG
Goswin
next prev parent reply other threads:[~2010-05-18 6:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-17 18:00 lyn HONG
2010-05-18 6:58 ` Goswin von Brederlow [this message]
2010-05-18 14:58 ` [Caml-list] " lyn HONG
2010-05-18 17:33 ` Goswin von Brederlow
2010-05-20 22:04 ` Richard Jones
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