From: Ullrich von Bassewitz (uz_at_musoftware.de)
Date: 2003-01-28 17:35:26
Hi!
On Thu, Jan 23, 2003 at 08:54:05AM -0800, Shawn Jefferson wrote:
> Allocate a buffer that is 16 bytes extra then 7680, 4k aligned and then free
> the first 16 bytes. Return a pointer to the start of the buffer + 16 bytes
> and that should give me the proper aligned buffer I need.
>
> Anything look wrong with this, or is there a better way to do this, assuming
> I want to support arbitrary screen line lengths (for large scrolling screens.)
Sounds good for me. The only problem is that you cannot free parts of a chunk
allocated by malloc, at least not using standard C calls. What you can do is
to use _hadd() to add a block to the heap free list, but this is non portable
(and probably not worth the trouble for just 16 bytes - the call to _hadd
will also need a few bytes).
Regards
Uz
--
Ullrich von Bassewitz uz_at_musoftware.de
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