Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Yes, you are right. The communication protocol and the predefined communication sequences are central and critical to my application.

Once the communication is not "synchronized" (synchronized in sense of the communication flow) the application will get into a "no communication possible" mode.

Having still some messages in the queue would be catastrophic. I handled this by putting complete Protocol Data Units into the Queue. Thus only complete messages will be send. I am expecting an answer+acknowledge per PDU I have put into the queue. This is how I keep it synchronized. I am aware that this is quite simple and puts the protocol to the center of communication. The application will only close the rs232 in case the expected PDU (answer) has already been received and - the most important thing - the test-sequence is ended.

However, in case I would have some more threads working on the queues my concept would break into pieces.. It would be necessary to check by MyQueue->pending() if a messge is pending to be send. Moreover splitting up Messages into several PDU would make things once more complicated I am not sure how I would handle the stuff in this case. I guess I would assemble the message completely before sending it by rs232?

In reply to Re^4: Threaded RS232 communication by tobias_hofer
in thread Threaded RS232 communication by tobias_hofer

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others romping around the Monastery: (7)
    As of 2018-06-22 17:15 GMT
    Find Nodes?
      Voting Booth?
      Should cpanminus be part of the standard Perl release?

      Results (124 votes). Check out past polls.