132 строки
3.6 KiB
Java
132 строки
3.6 KiB
Java
/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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/*
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* This file is almost a complete re-write for Open MPI compared to the
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* original mpiJava package. Its license and copyright are listed below.
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* See <path to ompi/mpi/java/README> for more information.
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*/
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/*
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/*
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* File : Op.java
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* Author : Xinying Li, Sang LIm
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* Created : Thu Apr 9 12:22:15 1998
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* Revision : $Revision: 1.11 $
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* Updated : $Date: 2003/01/16 16:39:34 $
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* Copyright: Northeast Parallel Architectures Center
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* at Syracuse University 1998
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*/
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package mpi;
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import java.nio.*;
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/**
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* This class represents {@code MPI_Op}.
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*/
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public final class Op implements Freeable
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{
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protected final UserFunction uf;
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private boolean commute;
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private Datatype datatype;
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protected long handle;
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static
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{
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init();
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}
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private static native void init();
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protected Op(int type)
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{
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getOp(type);
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uf = null;
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commute = true;
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}
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private native void getOp(int type);
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/**
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* Bind a user-defined global reduction operation to an {@code Op} object.
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* <p>Java binding of the MPI operation {@code MPI_OP_CREATE}.
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* @param function user defined function
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* @param commute {@code true} if commutative, {@code false} otherwise
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*/
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public Op(UserFunction function, boolean commute)
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{
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handle = 0; // When JNI code gets the handle it will be initialized.
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uf = function;
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this.commute = commute;
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}
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protected void setDatatype(Datatype t)
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{
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datatype = t;
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}
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protected void call(Object invec, Object inoutvec, int count)
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throws MPIException
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{
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if(datatype.baseType == Datatype.BOOLEAN)
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{
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uf.call(invec, inoutvec, count, datatype);
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}
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else
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{
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uf.call(((ByteBuffer)invec).order(ByteOrder.nativeOrder()),
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((ByteBuffer)inoutvec).order(ByteOrder.nativeOrder()),
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count, datatype);
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}
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}
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/**
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* Test if the operation is conmutative.
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* <p>Java binding of the MPI operation {@code MPI_OP_COMMUTATIVE}.
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* @return {@code true} if commutative, {@code false} otherwise
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*/
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public boolean isCommutative()
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{
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return commute;
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}
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/**
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* Java binding of the MPI operation {@code MPI_OP_FREE}.
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* @throws MPIException
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*/
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@Override public native void free() throws MPIException;
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/**
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* Test if operation object is null.
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* @return true if the operation object is null, false otherwise
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*/
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public native boolean isNull();
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} // Op
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