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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Multiple instantiation of Ada.Direct_IO
Date: 1998/02/01
Message-ID: <dewar.886367773@merv>#1/1
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Date: 1998-02-01T00:00:00+00:00
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Blake asks

<<I have a bit of a problem. Basically I am using Ada.Direct_IO to read /
write to a file. The problem being I wish to write records of differing
types to the file, without closing the file and re-opening it.

Ada 95 will not even let me open the same file as two different file_type
variables as this creates a Use Exception error.

Can anybody help?

Thanks

Blake
>>


GNAT fully implements file sharing, but there is a penalty involved in
the use of this feature -- you have to read the section of the manual
on file sharing, and I understand that this is too much of a burden for
many people :-)

to be fair, any approach using file sharing is NOT necessarily portable,
which is why GNAT does not allow it by default!