From: Richard Henderson <rth@redhat.com>
To: Tom Tromey <tom@tromey.com>
Cc: libffi-discuss <libffi-discuss@sourceware.org>
Subject: Re: documentation patch, oddities, and proposals
Date: Mon, 09 Nov 2015 07:39:00 -0000 [thread overview]
Message-ID: <56404DB8.9040309@redhat.com> (raw)
In-Reply-To: <87wpttd47v.fsf@tromey.com>
On 11/07/2015 08:00 PM, Tom Tromey wrote:
> rth> Indeed. It would be very nice to require a separate layout call,
> rth> rather than imply it from ffi_prep_cif. This would also nicely fix
> rth> the problem that libgo encountered wrt zero-sized structures.
>
> What was that problem btw? If it's something users might encounter I
> could update the docs to account for it.
The fact that size 0 is the trigger that the structure hasn't been layed out.
So every call to such a function re-enters the layout for a zero-sized struct.
In the end it still works, but there's more overhead than needed.
r~
next prev parent reply other threads:[~2015-11-09 7:39 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-04 5:32 Tom Tromey
2015-11-04 5:35 ` Andrew Pinski
2015-11-04 7:31 ` Richard Henderson
2015-11-04 14:20 ` Tom Tromey
2015-11-04 14:24 ` Richard Henderson
2015-11-07 19:01 ` Tom Tromey
2015-11-09 7:39 ` Richard Henderson [this message]
2015-11-10 23:36 ` Tom Tromey
2015-11-16 4:27 ` Tom Tromey
2015-11-17 9:09 ` Richard Henderson
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