05-23-2002
Following is the diagram I found in SCO manuals :-
(upstream) (downstream)
(up^stream) (downstr|eam)
(up|stream) (downstr|eam)
(up|stream) (downstrXeam)
READ QUEUE«.........»WRITE QUEUE
(up^stream) (downstr|eam)
(up|stream) (downstr|eam)
(up|stream) (downstrXeam)
READ QUEUE«...........»WRITE QUEUE
(upstream) (downstream)
The above figure shows queue's linkage with neighboring modules with links ( solid vertical arrows - --> or --X ) in both directions.
I can very well understand the flow of message from downstream to upstream direction. But according to the manual each queue locates it mates ( see dotted line ) .
My question is I am not able to understand why such a relation is required or else I am completely wrong ?
Thanks in advance.
Last edited by S.P.Prasad; 05-23-2002 at 01:37 AM..
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LEARN ABOUT DEBIAN
data::stream::bulk::doneflag
Data::Stream::Bulk::DoneFlag(3pm) User Contributed Perl Documentation Data::Stream::Bulk::DoneFlag(3pm)
NAME
Data::Stream::Bulk::DoneFlag - Implement the "is_done" method in terms of a flag
VERSION
version 0.11
SYNOPSIS
package Data::Stream::Bulk::Blah;
use Moose;
with qw(Data::Stream::Bulk::DoneFlag);
sub get_more {
if ( my @more = more() ) {
return @more;
} else {
return;
}
}
DESCRIPTION
This role implements the "Data::Stream::Bulk" core API in terms of one method ("get_more").
As a convenience it calls "finished" when the stream is exhausted, so that cleanup may be done.
This is used by classes like Data::Stream::Bulk::DBI, Data::Stream::Bulk::Callback.
METHODS
is_done
Returns the state of the iterator.
next
As long as the iterator is not yet done, calls "get_more".
If "get_more" returned a false value instead of an array reference then "done" is set, "finished" is called, and this "next" does
nothing on subsequent calls.
finished
A noop by default. Can be overridden if so desired.
REQUIRED_METHODS
get_more
Returns the next block of data as an array ref, or a false value if no items are left.
AUTHOR
Yuval Kogman <nothingmuch@woobling.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Yuval Kogman.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
perl v5.14.2 2012-02-14 Data::Stream::Bulk::DoneFlag(3pm)