Re: using typedef to create aligned types

Javier Arevalo wrote:

> Also my understanding is that sizeof(*p) = (char*)(p+1) - (char*)(p) 
> by definition, so a class with an int is sizeof 4 and a class with an 
> int and an alignment of 16 must be sizeof 16.
>
> Save typos, that should give an idea of what's going on.

Well then in the typedef __declspec(align(16)) Fred AlignedFred, VC 7.1 
is broken.  It passes through a size of 40 bytes for a new 
AlignedFred[10].  Contrast with class __declspec(align(16)) AlignedFred, 
new AlignedFred[10] passes in a size of 160 bytes.

Last time I looked at the implementation for operator new in the CRT it 
called malloc.  I don't see how the declspec is being honoured in such a 
case.

cheers
DanG

-- 
Dan Glastonbury, Senior Programmer, The Creative Assembly
PO Box 883 Fortitude Valley, QLD, Australia. 4006
T: +617 3252 1359 W: http://www.creative-assembly.com.au
`Pour encourjay lays ortras'



-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now. 
http://productguide.itmanagersjournal.com/
_______________________________________________
Gamedevlists-windows mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/gamedevlists-windows
Archives:
http://sourceforge.net/mailarchive/forum.php?forum_id=555