Package edu.rit.mp.buf

Class ObjectMatrixBuf_1<T>

java.lang.Object

edu.rit.mp.Buf

edu.rit.mp.ObjectBuf<T>

edu.rit.mp.buf.ObjectMatrixBuf<T>

edu.rit.mp.buf.ObjectMatrixBuf_1<T>

Type Parameters:

T - Data type of the objects in the buffer.

public class ObjectMatrixBuf_1<T>
extends ObjectMatrixBuf<T>

Class ObjectMatrixBuf_1 provides a buffer for a matrix of object items sent or received using the Message Protocol (MP). The matrix row and column strides must both be 1. While an instance of class ObjectMatrixBuf_1 may be constructed directly, normally you will use a factory method in class ObjectBuf. See that class for further information.

Version:

23-Mar-2009

Author:

Alan Kaminsky

Field Summary

Fields inherited from class edu.rit.mp.ObjectBuf

mySerializedItems

Fields inherited from class edu.rit.mp.Buf

myLength

Constructor Summary

Constructors

Constructor	Description
ObjectMatrixBuf_1(T[][] theMatrix, Range theRowRange, Range theColRange)	Construct a new object matrix buffer.

Method Summary

Modifier and Type	Method	Description
T	get(int i)	Obtain the given item from this buffer.
Buf	getReductionBuf(Op op)	Create a buffer for performing parallel reduction using the given binary operation.
void	put(int i, T item)	Store the given item in this buffer.

Methods inherited from class edu.rit.mp.buf.ObjectMatrixBuf

copy

Methods inherited from class edu.rit.mp.ObjectBuf

buffer, buffer, buffer, buffer, buffer, buffer, colSliceBuffer, colSliceBuffers, defaultCopy, emptyBuffer, fill, getTemporaryBuf, objectBuffer, objectBuffer, patchBuffer, patchBuffers, receiveItems, reset, rowSliceBuffer, rowSliceBuffers, sendItems, sliceBuffer, sliceBuffer, sliceBuffers, sliceBuffers

Methods inherited from class edu.rit.mp.Buf

length

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ObjectMatrixBuf_1

public ObjectMatrixBuf_1(T[][] theMatrix,
 Range theRowRange,
 Range theColRange)

Construct a new object matrix buffer. It is assumed that the rows and columns of theMatrix are allocated and that each row of theMatrix has the same number of columns.

Parameters:

theMatrix - Matrix.

theRowRange - Range of rows to include. The stride is assumed to be 1.

theColRange - Range of columns to include. The stride is assumed to be 1.

Method Details

get

public T get(int i)

Obtain the given item from this buffer.

The get() method must not block the calling thread; if it does, all message I/O in MP will be blocked. Obtain the given item from this buffer.

The get() method must not block the calling thread; if it does, all message I/O in MP will be blocked. Obtain the given item from this buffer.

The get() method must not block the calling thread; if it does, all message I/O in MP will be blocked.

Overrides:

get in class ObjectMatrixBuf<T>

Parameters:

i - Item index in the range 0 .. length()-1.

Returns:

Item at index i.

put

public void put(int i,
 T item)

Store the given item in this buffer.

The put() method must not block the calling thread; if it does, all message I/O in MP will be blocked.

Overrides:

put in class ObjectMatrixBuf<T>

Parameters:

i - Item index in the range 0 .. length()-1.

item - Item to be stored at index i.

getReductionBuf

public Buf getReductionBuf(Op op)

Create a buffer for performing parallel reduction using the given binary operation. The results of the reduction are placed into this buffer.

Operations performed on the returned reduction buffer have the same effect as operations performed on this buffer, except whenever a source item S is put into a destination item D in this buffer, D is set to D op S, that is, the reduction of D and S using the given binary operation (rather than just setting D to S). Create a buffer for performing parallel reduction using the given binary operation. The results of the reduction are placed into this buffer. Create a buffer for performing parallel reduction using the given binary operation. The results of the reduction are placed into this buffer.

Overrides:

getReductionBuf in class ObjectMatrixBuf<T>

Parameters:

op - Binary operation.

Returns:

a Buf object.

Throws:

ClassCastException - (unchecked exception) Thrown if this buffer's element data type and the given binary operation's argument data type are not the same.