struct by value copies

[Thomas Heller]

Timothy Wall schrieb:
> I'm wondering if the responsibility of making a copy of struct by  
> value arguments lies with the caller of ffi_call or with libffi.
> 
> I've been looking through different targets to see if this is done  
> anywhere, and don't see copies made anywhere, so I would guess  
> responsibility lies with the caller of ffi_call.
> 
> Anyone know for sure?

Are you asking in the context of your win64 port?  I do not know
the answer but I suspect that ffi_call makes the copy itself.

In my Python win64 libffi implementation there is still the bug that these
copies are not made (for structures that do not fit into a register)
although I have never seen this bug on other platforms.

I did not yet have the time to debug or fix this problem.

-- 
Thanks,
Thomas