From:	fjh AT cs DOT mu DOT OZ DOT AU (Fergus Henderson)
Subject:	Re: kaffe 0.9 and gnuwin b18 don't mix
18 May 1997 01:53:38 -0700 :
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Message-ID:	<199705180755.RAA21968.cygnus.gnu-win32@mundook.cs.mu.OZ.AU>
Original-To:	peterham AT peterham DOT com
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In-Reply-To:	<337E8BEC.77B5@peterham.com> from "Peter Ham" at May 17, 97 08:56:12 pm
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Original-Sender:	owner-gnu-win32 AT cygnus DOT com

Peter Ham, you wrote:
> 
> The memory manager in kaffe-0.9 requires that the operating system
> memory allocator return "page" aligned pointers.
> 
> Unfortunately, gnuwin b18 doesn't support memalign(), or valloc(), and
> malloc doesn't return data aligned to kaffe's
> preference.

Well, if you don't mind wasting a large amount of memory, try
the following (msotly untested) code...

/*
** round_up(amount, align) returns `amount' rounded up to the nearest
** alignment boundary.  `align' must be a power of 2.
*/
#define round_up(amount, align) ((((amount) - 1) | ((align) - 1)) + 1)

#define PAGESIZE 4096
#define memalign(size) round_up(malloc((size) + PAGESIZE), PAGESIZE)

-- 
Fergus Henderson <fjh AT cs DOT mu DOT oz DOT au>   |  "I have always known that the pursuit
WWW: <http://www.cs.mu.oz.au/~fjh>   |  of excellence is a lethal habit"
PGP: finger fjh AT 128 DOT 250 DOT 37 DOT 3         |     -- the last words of T. S. Garp.
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