Package org.jcsp.lang

Class BlackHoleChannelInt

java.lang.Object
org.jcsp.lang.BlackHoleChannelInt
All Implemented Interfaces:
ChannelOutputInt, Poisonable

public class BlackHoleChannelInt extends Object implements ChannelOutputInt
This implements ChannelOutputInt with black hole semantics.

Description

BlackHoleChannelInt is an implementation of ChannelOutputInt that yields black hole semantics for a channel. Writers may always write but there can be no readers. Any number of writers may share the same black hole.

Note: BlackHoleChannelInts are used for masking off unwanted outputs from processes. They are useful when we want to reuse an existing process component intact, but don't need some of its output channels (i.e. we don't want to redesign and reimplement the component to remove the redundant channels). Normal channels cannot be plugged in and left dangling as this may deadlock (parts of) the component being reused.

See Also:
  • Constructor Details

    • BlackHoleChannelInt

      public BlackHoleChannelInt()
  • Method Details

    • write

      public void write(int n)
      Write an integer to the channel and loose it.
      Specified by:
      write in interface ChannelOutputInt
      Parameters:
      n - the integer to write to the channel.
    • poison

      public void poison(int strength)
      Description copied from interface: Poisonable
      This injects poison into the channel. If the channel was not explicitly constructed to be poisonable or if the strength of poison is not greater than the channel immunity level, the poison will have no effect.
      Specified by:
      poison in interface Poisonable
      Parameters:
      strength - the strength of the poison (must be >= 0).