* Double+Int Records (C-Interface) and Double_array_tag
@ 2006-01-19 10:24 Bauer, Christoph
2006-01-19 10:59 ` [Caml-list] " Frederic van der Plancke
2006-01-19 11:25 ` Richard Jones
0 siblings, 2 replies; 3+ messages in thread
From: Bauer, Christoph @ 2006-01-19 10:24 UTC (permalink / raw)
To: caml-list
Hi,
given a type like
type t = {
i : int;
f0 : float;
f1 : float;
...
f100 : float;
}
A value from this type is constructed in C-code. Is
it possible to create a block with a Double_array_tag?
(Because there are only unboxed values in this record.)
Thanks,
Christoph Bauer
Dipl. Inf.
LMS Deutschland GmbH
Luxemburgerstr. 7
D-67657 Kaiserslautern
T +49 631 303 22 152
mailto:Christoph.Bauer@lms-gmbh.de
http://www.lmsintl.com
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Caml-list] Double+Int Records (C-Interface) and Double_array_tag
2006-01-19 10:24 Double+Int Records (C-Interface) and Double_array_tag Bauer, Christoph
@ 2006-01-19 10:59 ` Frederic van der Plancke
2006-01-19 11:25 ` Richard Jones
1 sibling, 0 replies; 3+ messages in thread
From: Frederic van der Plancke @ 2006-01-19 10:59 UTC (permalink / raw)
To: caml-list
"Bauer, Christoph" wrote:
>
> Hi,
>
> given a type like
>
> type t = {
> i : int;
> f0 : float;
> f1 : float;
> ...
> f100 : float;
> }
>
> A value from this type is constructed in C-code. Is
> it possible to create a block with a Double_array_tag?
> (Because there are only unboxed values in this record.)
For what I know, all float values in this record are actually boxed because of the "int" field. Only records (and arrays) that contain only floats have their floats unboxed.
Frédéric
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [Caml-list] Double+Int Records (C-Interface) and Double_array_tag
2006-01-19 10:24 Double+Int Records (C-Interface) and Double_array_tag Bauer, Christoph
2006-01-19 10:59 ` [Caml-list] " Frederic van der Plancke
@ 2006-01-19 11:25 ` Richard Jones
1 sibling, 0 replies; 3+ messages in thread
From: Richard Jones @ 2006-01-19 11:25 UTC (permalink / raw)
To: Bauer, Christoph; +Cc: caml-list
On Thu, Jan 19, 2006 at 11:24:54AM +0100, Bauer, Christoph wrote:
> given a type like
>
> type t = {
> i : int;
> f0 : float;
> f1 : float;
> ...
> f100 : float;
> }
>
> A value from this type is constructed in C-code. Is
> it possible to create a block with a Double_array_tag?
> (Because there are only unboxed values in this record.)
On a 32 bit machine, the int is 4 bytes long and the floats are 8
bytes long, so the floats wouldn't be aligned. How about simply:
type t = {
i : int;
f : float array;
}
Rich.
--
Richard Jones, CTO Merjis Ltd.
Merjis - web marketing and technology - http://merjis.com
Team Notepad - intranets and extranets for business - http://team-notepad.com
^ permalink raw reply [flat|nested] 3+ messages in thread
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