Package org.jcsp.lang

Class ChannelInputImpl<T>

java.lang.Object
org.jcsp.lang.ChannelInputImpl<T>
All Implemented Interfaces:
ChannelInput<T>, Poisonable
Direct Known Subclasses:
RejectableChannelInputImpl

class ChannelInputImpl<T> extends Object implements ChannelInput<T>
  • Field Details

  • Constructor Details

  • Method Details

    • endRead

      public void endRead()
      Description copied from interface: ChannelInput
      End an extended rendezvous. It must be invoked once (and only once) following a startRead.
      Specified by:
      endRead in interface ChannelInput<T>
    • read

      public T read()
      Description copied from interface: ChannelInput
      Read an Object from the channel.
      Specified by:
      read in interface ChannelInput<T>
      Returns:
      the object read from the channel
    • startRead

      public T startRead()
      Description copied from interface: ChannelInput
      Begin an extended rendezvous read from the channel. An extended rendezvous is not completed until the reader has completed its extended action. This method starts an extended rendezvous. When a writer to this channel writes, this method returns what was sent immediately. The extended rendezvous continues with reader actions until the reader invokes endRead. Only then will the writer be released (from its write method). The writer is unaware of the extended nature of the communication.

      The reader process must call endRead at some point after this function, otherwise the writer will not be freed and deadlock will probably follow.

      The reader process may perform any actions between calling startRead and endRead, including communications on other channels. Further communications on this channel, of course, should not be made.

      An extended rendezvous may be started after the channel's Guard has been selected by an Alternative (i.e. startRead instead of read).

      Specified by:
      startRead in interface ChannelInput<T>
      Returns:
      The object read from 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).