heatdiffsim/Status.java at master · AndrewGoupinets/heatdiffsim · GitHub

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/*
 * File         : Status.java
 * Author       : Sang Lim, Sung-Hoon Ko, Xinying Li, Bryan Carpenter
 * Created      : Thu Apr  9 12:22:15 1998
 * Revision     : $Revision: 1.15 $
 * Updated      : $Date: 2003/01/16 16:39:34 $
 * Copyright: Northeast Parallel Architectures Center
 *            at Syracuse University 1998
 */

package mpi;

public class Status extends Freeable {

  public int index;
  public int source;
  public int tag;

  int elements;

  //protected int count;
  protected int object_count;

//  protected Status(long _handle) { handle = _handle;}

  public Status() {alloc() ;}
  private native void alloc() ;

  public void finalize() throws MPIException {
      synchronized(MPI.class) {
          MPI.freeList.addFirst(this) ;
      }
  }

  native void free() ;

  /**
   * Get the number of received entries.
   * <p>
   * <table>
   * <tr><td><tt> datatype </tt></td><td> datatype of each item in receive
   *                                      buffer </tr>
   * <tr><td><em> returns: </em></td><td> number of received entries </tr>
   * </table>
   * <p>
   * Java binding of the MPI operation <tt>MPI_GET_COUNT</tt>.
   */

  public int Get_count(Datatype datatype) throws MPIException {

    if (datatype.isObject())
      return object_count;    // Is this correct?
    else
      return get_count(datatype);
  }

  private native int get_count(Datatype datatype);

  /**
   * Test if communication was cancelled.
   * <p>
   * <table>
   * <tr><td><em> returns: </em></td><td> true if the operation was
   *                                      succesfully cancelled,
   *                                      false otherwise
   * </table>
   * <p>
   * Java binding of the MPI operation <tt>MPI_TEST_CANCELLED</tt>.
   */

  public native boolean Test_cancelled() throws MPIException ;

  /**
   * Retrieve number of basic elements from status.
   * <p>
   * <table>
   * <tr><td><tt> datatype </tt></td><td> datatype used by receive
   *                                      operation </tr>
   * <tr><td><em> returns: </em></td><td> number of received basic
   *                                      elements </tr>
   * </table>
   * <p>
   * Java binding of the MPI operation <tt>MPI_GET_ELEMENTS</tt>.
   */

  public int Get_elements(Datatype datatype) throws MPIException {
    if(datatype.isObject())
      return MPI.UNDEFINED;  // Is this correct?
    else
      return get_elements(datatype) ;
  }

  private native int get_elements(Datatype datatype);

  private static native void init();

  protected long handle;

  static {
    init();
  }

}

// Things to do
//