* C Interface and float record
@ 2009-06-16 8:40 Christoph Bauer
2009-06-16 9:44 ` [Caml-list] " Christophe TROESTLER
0 siblings, 1 reply; 3+ messages in thread
From: Christoph Bauer @ 2009-06-16 8:40 UTC (permalink / raw)
To: caml-list
Hi,
I have a type
type t = {
f1 : float;
f2 : float;
f3 : float;
}
and a external C-function should allocate this as for the result.
Do I have to use
caml_alloc(6, Double_array_tag)
to allocate such a record? I'm unsure about the 6.
Could I also use caml_alloc_small?
Thanks,
Christoph Bauer
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Caml-list] C Interface and float record
2009-06-16 8:40 C Interface and float record Christoph Bauer
@ 2009-06-16 9:44 ` Christophe TROESTLER
2009-06-16 14:57 ` Christoph Bauer
0 siblings, 1 reply; 3+ messages in thread
From: Christophe TROESTLER @ 2009-06-16 9:44 UTC (permalink / raw)
To: christoph.bauer; +Cc: OCaml Mailing List
On Tue, 16 Jun 2009 10:40:31 +0200, Christoph Bauer wrote:
>
> type t = {
> f1 : float;
> f2 : float;
> f3 : float;
> }
>
> and a external C-function should allocate this as for the result.
>
> Do I have to use
>
> caml_alloc(6, Double_array_tag)
caml_alloc(3 * Double_wosize, Double_array_tag)
would be better (portable between 32 and 64 bits).
C.
^ permalink raw reply [flat|nested] 3+ messages in thread
* RE: [Caml-list] C Interface and float record
2009-06-16 9:44 ` [Caml-list] " Christophe TROESTLER
@ 2009-06-16 14:57 ` Christoph Bauer
0 siblings, 0 replies; 3+ messages in thread
From: Christoph Bauer @ 2009-06-16 14:57 UTC (permalink / raw)
To: Christophe TROESTLER; +Cc: OCaml Mailing List
> > type t = {
> > f1 : float;
> > f2 : float;
> > f3 : float;
> > }
> >
> > and a external C-function should allocate this as for the result.
> >
> > Do I have to use
> >
> > caml_alloc(6, Double_array_tag)
>
> caml_alloc(3 * Double_wosize, Double_array_tag)
>
> would be better (portable between 32 and 64 bits).
Thanks Christophe,
i use Double_wosize and it works fine
Christoph
^ permalink raw reply [flat|nested] 3+ messages in thread
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