From: Jay <jay.krell@cornell.edu>
To: Andrew Haley <aph@redhat.com>
Cc: Hayden Livingston <halivingston@gmail.com>,
"libffi-discuss@sourceware.org" <libffi-discuss@sourceware.org>
Subject: Re: does it matter how I construct an aggregate struct type if its size is the same?
Date: Fri, 18 Dec 2015 21:42:00 -0000 [thread overview]
Message-ID: <063E0A50-A359-4F85-8DCF-AFD3B5504973@gmail.com> (raw)
In-Reply-To: <567466D0.5020305@redhat.com>
Still beware of alignment.
- Jay
On Dec 18, 2015, at 12:04 PM, Andrew Haley <aph@redhat.com> wrote:
> On 18/12/15 15:16, Hayden Livingston wrote:
>> Thanks, Andrew. Where is this exception? In ABIs?
>>
>> So you're suggesting I use char's to construct my ffi_types?
>
> Well, it can be awkward. Some targets pass the components of a
> struct in registers. But this only matters if you pass a struct
> by value, which is a fairly unusual thing to do in C. If you're
> passing a struct by reference, then yes, you can just create a
> char array of the right size.
>
> Andrew.
>
next prev parent reply other threads:[~2015-12-18 21:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-18 6:47 Hayden Livingston
2015-12-18 6:50 ` Hayden Livingston
2015-12-18 11:08 ` Andrew Haley
2015-12-18 15:16 ` Hayden Livingston
2015-12-18 20:04 ` Andrew Haley
2015-12-18 21:42 ` Jay [this message]
2015-12-18 22:16 ` Hayden Livingston
2015-12-18 22:24 ` Andrew Haley
2015-12-18 23:10 ` Hayden Livingston
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