org.jcsp.plugNplay
Class Nand

java.lang.Object
  org.jcsp.plugNplay.Nand

All Implemented Interfaces:

CSProcess

public final class Nand
extends Object
implements CSProcess

Bitwise nands two Integer streams to one stream.

Process Diagram

    in0  ______
   -->--|      | out
    in1 | Nand |-->--
   -->--|______|
 

Description

This is a process with an infinite loop that waits for a Object of type Number to be sent down each of its input channels. The loop body then calculates the bitwise NAND on the values of the two Numbers and writes the result as a new Integer to its output channel.

Channel Protocols

Input Channels
in1,in2	java.lang.Number	Both Channels can accept data from any subclass of Number. It is possible to send Floats down one channel Nand Integers down the other. However all values will be converted to ints.
Output Channels
out	java.lang.Integer	The output will always be of type Integer.

Example

The following example shows how the use of this process in a small program. The program also uses some of the other building block processes. It generates a sequence of numbers, rounds each odd number down to the nearest even number, negates them and prints them to the screen.

 import org.jcsp.lang.*;
 import org.jcsp.plugNplay.*;
 
 public class NandExample {
 
   public static void main (String[] argv) {
 
     final One2OneChannel a = Channel.one2one ();
     final One2OneChannel b = Channel.one2one ();
     final One2OneChannel c = Channel.one2one ();
     final One2OneChannel d = Channel.one2one ();
 
     new Parallel (
       new CSProcess[] {
         new Numbers (a.out ()),
         new Generate (b.out (), Integer.MAX_VALUE - 1),
         new Nand (a.in (), b.in (), c.out ()),
         new Successor (c.in (), d.out ()),
         new Printer (d.in (), "--> ", "\n")
       }
     ).run ();
 
   }
 
 }
 

Author:

P.H. Welch and P.D. Austin

Constructor Summary

Nand(ChannelInput in1, ChannelInput in2, ChannelOutput out)
Construct a new Nand process with the input Channels in1 and in2 and the output Channel out.

Method Summary

void	run() The main body of this process.

Methods inherited from class java.lang.Object

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

Constructor Detail

Nand

public Nand(ChannelInput in1,
            ChannelInput in2,
            ChannelOutput out)

Construct a new Nand process with the input Channels in1 and in2 and the output Channel out. The ordering of the Channels in1 and in2 make no difference to the functionality of this process.

Parameters:

in1 - the first input Channel

in2 - the second input Channel

out - the output Channel

Method Detail

run

public void run()

The main body of this process.

Specified by:

run in interface CSProcess