Examples of ptolemy.domains.pn.kernel.PNQueueReceiver

• ptolemy.domains.pn.kernel.PNQueueReceiver
  A receiver with a FIFO queue that blocks the calling process on a read if the FIFO queue is empty and on a write if the queue is full. Blocking read provides the basic functionality of a FIFO channel in the process networks model of computation. Blocking write supports the implementation suggested by Parks for bounded memory execution of process networks.

  Tokens are appended to the queue with the put() method, which blocks on a write if the queue is full. Tokens are removed from the queue with the get() method, which blocks on a read if the queue is empty. In case a process blocks on a read or a write, the receiver informs the director about the same. The receiver also unblocks processes blocked on a read or a write. In case a process is blocked on a read (read-blocked), it is unblocked on availability of a token. If a process is blocked on a write (write-blocked), it is unblocked on the availability of room in the queue and informs the director of the same.

  This class is also responsible for pausing or terminating a process that tries to read from or write to the receiver. In case of termination, the receiver throws a TerminateProcessException when a process tries to read from or write to the receiver. This terminates the process. In case of pausing, the receiver suspends the process when it tries to read from or write to the receiver and resumes it only after a request to resume the process has been received.g

  @author Mudit Goel, John S. Davis II, Edward A. Lee, Xiaowen Xin @version $Id: PNQueueReceiver.java,v 1.112 2006/08/21 23:15:22 cxh Exp $ @since Ptolemy II 0.2 @Pt.ProposedRating Yellow (eal) @Pt.AcceptedRating Red (hyzheng) @see QueueReceiver @see ptolemy.actor.QueueReceiver

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