org.jcsp.lang
Class AltingChannelOutputInt

java.lang.Object
  org.jcsp.lang.Guard
      org.jcsp.lang.AltingChannelOutputInt

All Implemented Interfaces:

ChannelOutputInt, Poisonable

public abstract class AltingChannelOutputInt
extends Guard
implements ChannelOutputInt

This extends Guard and ChannelOutputInt to enable a process to choose between many integer output (and other) events.

A writing-end, obtained only from a symmetric channel by invoking its out() method, will implement this interface.

Description

AltingChannelOutputInt extends Guard and ChannelOutputInt to enable a process to choose between many integer output (and other) events. The methods inherited from Guard are of no concern to users of this package.

Example

 import org.jcsp.lang.*;
 
 public class AltingOutputIntExample implements CSProcess {
 
   private final AltingChannelOutputInt out0, out1;
   
   public AltingOutputIntExample (final AltingChannelOutputInt out0,
                                  final AltingChannelOutputInt out1) {
     this.out0 = out0;
     this.out1 = out1;
   }
 
   public void run () {
 
     final Guard[] altChans = {out0, out1};
     final Alternative alt = new Alternative (altChans);
 
     while (true) {
       switch (alt.select ()) {
         case 0:
           out0.write (0);
           System.out.println ("out0 written");
         break;
         case 1:
           out1.write (1);
           System.out.println ("out1 written");
         break;
       }
     }
 
   }
 
 }
 

Author:

P.H. Welch

See Also:

Guard, Alternative, One2OneChannelSymmetricInt, AltingChannelOutput

Constructor Summary

AltingChannelOutputInt()

Method Summary

abstract boolean

pending() Returns whether the receiver is committed to read from this channel.

Methods inherited from class org.jcsp.lang.Guard

schedule

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.jcsp.lang.ChannelOutputInt

write

Methods inherited from interface org.jcsp.lang.Poisonable

poison

Constructor Detail

AltingChannelOutputInt

public AltingChannelOutputInt()

Method Detail

pending

public abstract boolean pending()

Returns whether the receiver is committed to read from this channel.

Note: if this returns true, you must commit to write down this channel.

Returns:

state of the channel.