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Re: munmap slowness; IsBadReadPtr considered harmful
On Tue, 24 Feb 2004, Brian Ford wrote:
> On Tue, 24 Feb 2004, Brian Ford wrote:
>
> > for (end = (char *)addr + len, addr = (void *)((DWORD)addr % getpagesize());
> >
> Doh! Scratch that. Obvious bug.
>
> Something more like:
> addr = (void *)((DWORD)addr & getpagesize () - 1);
>
> I'll repost the final version when I actually have this tested well.
> Sorry!
>
It's too late in the day and my brain is turned off. I'm an idiot, I
know.
Make that:
addr = (void *)((DWORD)addr & ~(getpagesize () - 1));
Thanks.
--
Brian Ford
Senior Realtime Software Engineer
VITAL - Visual Simulation Systems
FlightSafety International
Phone: 314-551-8460
Fax: 314-551-8444