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Message-ID: <421F2987.3090307@byu.net>
Date: Fri, 25 Feb 2005 06:35:03 -0700
From: Eric Blake <ebb9 AT byu DOT net>
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To: cygwin AT cygwin DOT com
Subject: Re: mmap and MAP_FIXED
References: <421E60A0 DOT 8000102 AT stambulchik DOT net> <20050225120045 DOT GO18314 AT cygbert DOT vinschen DOT de>
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According to Corinna Vinschen on 2/25/2005 5:00 AM:
> The reason that MAP_FAILED only works on 64K boundaries so far is,
> that I didn't handle this case.  Usually there are not many good
> reasons to use MAP_FIXED.  However, I've checked in a patch which
> tries to handle MAP_FIXED on 4K boundaries, but only in the anonymous
> case.

While you are at it, POSIX requires an update to underlying file's ctime
sometime between mmap(... MAP_SHARED, PROT_WRITE ...) and the
corresponding munmap() or msync() if the mapped region was written to.  If
Windows correctly updates mtime on a mapped file, then one possible way to
do this might be: when munmap()ing, if mtime is newer than ctime (but less
than or equal to now), adjust ctime to match mtime.

- --
Life is short - so eat dessert first!

Eric Blake             ebb9 AT byu DOT net
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