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java.lang.Object
   |
   +----edu.utah.janos.nodeos.CommSpace

Summary

class  CommSpace
     extends java.lang.Object
{
          // Fields 1
     private final CommSpaceElement[] table;

          // Constructors 1
     CommSpace(int);

          // Methods 9
     private final void checkIndex(int);
     private void notifyOnIndex(int);
     CommSpaceElement read(int) throws ArrayIndexOutOfBoundsException;
     final int size();
     CommSpaceElement swap(int, CommSpaceElement);
     CommSpaceElement take(int) throws ArrayIndexOutOfBoundsException;
     private void waitOnIndex(int) throws InterruptedException;
     CommSpaceElement waitToTake(int) throws ArrayIndexOutOfBoundsException, InterruptedException;
     void write(int, CommSpaceElement) throws ArrayIndexOutOfBoundsException;
}

Variation on an array, with some tuple-space like properties. Objects are not shared between flows, they are copied on read.

Author:

Janos Ministry of Development

Fields

· table

Summary  |  Top

   private final CommSpaceElement[] table

The table mapping indicies to elements.

Constructors

· CommSpace

Summary  |  Top

   CommSpace(int size) 

   final int size() 

   private final void checkIndex(int index) 

   void write(int index, 
              CommSpaceElement elem)  throws ArrayIndexOutOfBoundsException

Write the given element at the given index. Note that this function may create cross-process pointers..

   CommSpaceElement take(int index)  throws ArrayIndexOutOfBoundsException

   CommSpaceElement waitToTake(int index)  throws ArrayIndexOutOfBoundsException, InterruptedException

   CommSpaceElement read(int index)  throws ArrayIndexOutOfBoundsException

   CommSpaceElement swap(int index, 
                         CommSpaceElement elem) 

   private void notifyOnIndex(int index) 

Notify potential interested parties about a change at the given index.

   private void waitOnIndex(int index)  throws InterruptedException

Wait for something to change in the slot at the given index.

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