Re: Returning values from objc_msgSend etc
Re: Returning values from objc_msgSend etc
- Subject: Re: Returning values from objc_msgSend etc
- From: "Sherm Pendley" <email@hidden>
- Date: Mon, 31 Mar 2008 17:19:34 -0400
On Mon, Mar 31, 2008 at 1:03 PM, Greg Parker <email@hidden> wrote:
> On Mar 31, 2008, at 8:34 AM, Sherm Pendley wrote:
> > On Sat, Mar 1, 2008 at 9:00 AM, Greg Parker <email@hidden> wrote:
> >>
> >> I don't think libffi does any type promotion.
> >
>
> ffi_call(3) says:
> "rvalue must point to storage that is sizeof(long) or larger. For
> smaller return value sizes, the ffi_arg or ffi_sarg integral type must
> be used to hold the return value."
> ...
> ...which means this isn't allowed. In fact, it's probably smashing
> memory on your stack.
I guess I may have misunderstood the term then. That sounds like type
promotion of the return value to me. :-)
Sorry about the noise.
sherm--
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