Re: file mapping

From: Mike Ghan <MikeGhan_at_logix-controls.com>
Date: Tue, 30 May 2006 12:41:23 -0700

I believe what you're referring to is file sharing. Here is a version
of OPEN-FILE modified for file sharing:

\ Open File as Shared. Shared files must be open with same fam.
: OPEN-FILE-SHARED ( c-addr u fam -- fileid ior )
   R-BUF -ROT R@ ZPLACE
   R> SWAP ( fam ) FILE_SHARE_READ OVER ( fam ) R/W =
   IF FILE_SHARE_WRITE OR THEN
   0 OPEN_EXISTING
   FILE_ATTRIBUTE_NORMAL FILE_FLAG_SEQUENTIAL_SCAN OR
   0 CreateFile DUP 1+ 0= -199 AND ;

Note that if the other application has not opened the file in share
mode, you'll get a error.

Hope this helps,
Mike

-----Original Message-----
From: sftalk-bounce_at_forth.com [mailto:sftalk-bounce_at_forth.com] On Behalf
Of Dr. Roger Dube
Sent: Tuesday, May 30, 2006 11:29 AM
To: sftalk_at_forth.com
Subject: [sftalk] file mapping

We are having email issues today, so if this has been posted already,
please accept my apologies.

Does SwiftForth support Windows' file mapping? Has anyone used this
approach to avoid collisions between different applications trying to
access the same file at the same time?

-- Roger
--------------------------------------------
Dr. Roger Dube
President and Chief Science Officer
Digital Authentication Technologies, Inc.
561.392.7404 (office)
561.892.2474 (eFax)
RDube_at_datHQ.com

http://www.datHQ.com

1900 Glades Road Suite 441
Boca Raton, FL 33431

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