Class: MessageChannel

• Inheritance
• Description
• Class protocol
  • instance creation
• Instance protocol
  • evaluation

Inheritance:

   Object
   |
   +--Message
      |
      +--MessageSend
         |
         +--MessageChannel

Package:

stx:libbasic2

Category:

Kernel-Methods

Version:

rev: 1.6 date: 2021/01/20 14:32:27

user: cg

file: MessageChannel.st directory: libbasic2

module: stx stc-classLibrary: libbasic2

Description:

MessageChannel provides the same functionality as MessageSend.
It has been provided for ST-80 compatibility.

Like with MessageSend, instances of MessageChannel can be used for 
simulation programs.
They keep some receiver and selector and can be evaluated at any time later.
(think of them as a cheaper alternative to blocks).

In contrast to MessageSend, MessageChannels expect arguments to be passed
if all sends are going to the same receiver, use:

example:
    |q|

    q := Queue new:120.
    1 to:100 do:[:i |
        q nextPut:(MessageChannel receiver:i selector:#+).
    ].
    [q notEmpty] whileTrue:[
        |m|

        m := q next.
        (m value:1) printNL.
    ].

copyright
COPYRIGHT (c) 1995 by Claus Gittinger
             All Rights Reserved

This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice.   This software may not
be provided or otherwise made available to, or used by, any
other person.  No title to or ownership of the software is
hereby transferred.

Class protocol:

 receiver: r selector: sel

(comment from inherited method)
create & return a new instance which can be used to
send sel to some receiver, r

Instance protocol:

 value

evaluate the messagesend with the original arguments