Request and Prequest

public class Request {

  // Nonblocking communication

  public Status Wait() {...}

  public Status Test() {...}

  public void finalize() {...}

  public boolean Is_null() {...}

  public static Status Waitany(Request [] array_of_requests) {...}

  public static Status Testany(Request [] array_of_requests) {...}

  public static Status [] Waitall(Request [] array_of_requests) {...}

  public static Status [] Testall(Request [] array_of_requests) {...}

  public static Status []
                Waitsome(Request [] array_of_requests) {...}

  public static Status []
                Testsome(Request [] array_of_requests) {...}


  // Probe and cancel

  public void Cancel() {...}

  ...
}

public class Prequest extends Request {

  // Persistent communication requests

  public void Start() {...}

  public static void Startall(Request [] array_of_requests) {...}

  ...
}