Package org.jcsp.lang

Class SharedChannelInputImpl<T>

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void endRead()
      End an extended rendezvous.
      void poison​(int strength)
      This injects poison into the channel.
      T read()
      Read an Object from the channel.
      T startRead()
      Begin an extended rendezvous read from the channel.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • SharedChannelInputImpl

        SharedChannelInputImpl​(ChannelInternals<T> _channel,
                               int _immunity)
    • Method Detail

      • 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).