From: lutz@iks-jena.de (Lutz Donnerhacke)
Subject: Re: GNAT/Ada95 Streams Performance Issue
Date: Wed, 14 Aug 2002 08:58:37 +0000 (UTC)
Date: 2002-08-14T08:58:37+00:00 [thread overview]
Message-ID: <slrnalk6ts.oj.lutz@taranis.iks-jena.de> (raw)
In-Reply-To: 5ee5b646.0208131311.735b9993@posting.google.com
* Robert Dewar wrote:
>That certainly makes more sense. The trouble is of course
>that with Direct_IO you can't deal nicely with the last
>partial block (you are also depending very much on impl
>dependent choices in how Direct_IO works).
>
>Stream_IO should have the speed advantage without these
>disadvantages.
Sorry, don't take this to serious:
...
function copy (
in_fd, out_fd : OS_File_T;
offset : access OS_Off_T;
count : OS_Size_T
) return OS_SSize_T;
pragma Import(C, copy, "sendfile");
offset : aliased OS_Off_T := OS_Off_T'First;
send : OS_SSize_T :=
copy (in_fd, out_fd, offset'Access, OS_Size_T'Last);
begin
if send = -1 then
Put_Line ("Error ...");
else
Put_Line ("Copied" & OS_SSize_T'Image (send) & " Bytes.");
end if;
end;
next prev parent reply other threads:[~2002-08-14 8:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <3D51ECC9.8020406@cogeco.ca>
2002-08-12 15:09 ` GNAT/Ada95 Streams Performance Issue Waldek Hebisch
2002-08-12 23:49 ` Robert Dewar
2002-08-14 14:53 ` Waldek Hebisch
2002-08-13 1:22 ` Larry Hazel
2002-08-13 8:25 ` Robert Dewar
2002-08-13 13:45 ` Larry Hazel
2002-08-13 21:11 ` Robert Dewar
2002-08-14 8:58 ` Lutz Donnerhacke [this message]
2002-08-14 15:46 Mike Brenner
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