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Flaw in Win32 mmap() like function

To: penguinplay@sunsite.auc.dk, reiniger@rz.uni-wuerzburg.de
Subject: Flaw in Win32 mmap() like function
From: Daini Xie <dainix@munica.com>
Date: Fri, 15 Sep 2000 13:00:02 -0400
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Delivery-Date: Fri, 15 Sep 2000 12:52:43 -0400
Mailing-List: contact penguinplay-help@sunsite.auc.dk; run by ezmlm
Reply-To: penguinplay@sunsite.auc.dk

Hi, I worked with Win32 mmap() like function. All is fine except this
ghastly flaw. Win 32
CreateFileMapping function does not allow you to grow the file size.

On UNIX, you can call ftruncate(fd, len) to increase your file size and
then mmap() the newly
created region. On Win 32, you can not. You have to first unmap all the
view and close
the file map object before you can extend the file size, create a new
file map and new views
after. It creates a problem when you are working on a file that need to
grow.

Does anyone have a solution for this problem?

--
Daini Xie
Munica Tech Support  Get FormPAL Web Form CGI Script Creator
dainix@munica.com  Get DataDiplomat Web Database CGI Script Creator
http://www.munica.com  Get Web Calendar, News Archive, ClubMaster and
Discussion Forum



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