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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Exclusive file access
Date: Tue, 1 Sep 2015 15:31:31 -0500
Organization: JSA Research & Innovation
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 <ed3129f2-7c95-4ad9-ba0a-a8c7e4bfe6ae@googlegroups.com>
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Date: 2015-09-01T15:31:31-05:00
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<ahlan@marriott.org> wrote in message 
news:ed3129f2-7c95-4ad9-ba0a-a8c7e4bfe6ae@googlegroups.com...
On Thursday, August 27, 2015 at 3:52:36 PM UTC+2, ah...@marriott.org wrote:
...
>So far the only solution I can see is for me to write my own filing system, 
>one
>that has the ability to open the file for exclusive file access. However I 
>cannot
>believe that this is what people really do.

Well, obviously one could use a different compiler, since it appears that 
most Windows compilers do this right (we know for a fact that ObjectAda and 
Janus/Ada do so). Probably this is a side-effect of mapping a Unx-derived 
compiler onto Windows.

>Is there really no way for an Gnat Ada program to open a file for exclusive
>access against other processes without resorting to the program writing 
>his/her
>own filing system? (Open/Read/Write/Close that call directly the OS API)

Dunno. In any case, this is implementation-specific stuff (usually involving 
a Form parameter), so there is not going to be a portable solution. So you 
have to contact your vendor for help. Of course, if you don't have support 
you'll be SOL, but you get want you pay for. ;-)

                                          Randy.