edu.rit.mp.buf
Class FloatMatrixBuf_1

java.lang.Object
  edu.rit.mp.Buf
      edu.rit.mp.FloatBuf
          edu.rit.mp.buf.FloatMatrixBuf
              edu.rit.mp.buf.FloatMatrixBuf_1

public class FloatMatrixBuf_1
extends FloatMatrixBuf

Class FloatMatrixBuf_1 provides a buffer for a matrix of float items sent or received using the Message Protocol (MP). The matrix row and column strides must both be 1. While an instance of class FloatMatrixBuf_1 may be constructed directly, normally you will use a factory method in class FloatBuf. See that class for further information.

Field Summary

Fields inherited from class edu.rit.mp.Buf

myLength

Constructor Summary

FloatMatrixBuf_1(float[][] theMatrix, Range theRowRange, Range theColRange)
Construct a new float matrix buffer.

Method Summary

float	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, float item) Store the given item in this buffer.
protected int	receiveItems(int i, int num, ByteBuffer buffer) Receive as many items as possible from the given byte buffer to this buffer.
protected int	sendItems(int i, ByteBuffer buffer) Send as many items as possible from this buffer to the given byte buffer.

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

copy

Methods inherited from class edu.rit.mp.FloatBuf

buffer, buffer, buffer, buffer, buffer, buffer, colSliceBuffer, colSliceBuffers, defaultCopy, emptyBuffer, fill, getTemporaryBuf, patchBuffer, patchBuffers, rowSliceBuffer, rowSliceBuffers, 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 Detail

FloatMatrixBuf_1

public FloatMatrixBuf_1(float[][] theMatrix,
                        Range theRowRange,
                        Range theColRange)

Construct a new float 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 Detail

get

public float 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.

Overrides:

get in class FloatMatrixBuf

Parameters:

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

Returns:

Item at index i.

put

public void put(int i,
                float 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 FloatMatrixBuf

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.

Overrides:

getReductionBuf in class FloatMatrixBuf

Parameters:

op - Binary operation.

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.

sendItems

protected int sendItems(int i,
                        ByteBuffer buffer)

Send as many items as possible from this buffer to the given byte buffer.

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

Overrides:

sendItems in class FloatMatrixBuf

Parameters:

i - Index of first item to send, in the range 0 .. length-1.

buffer - Byte buffer.

Returns:

Number of items sent.

receiveItems

protected int receiveItems(int i,
                           int num,
                           ByteBuffer buffer)

Receive as many items as possible from the given byte buffer to this buffer.

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

Overrides:

receiveItems in class FloatMatrixBuf

Parameters:

i - Index of first item to receive, in the range 0 .. length-1.

num - Maximum number of items to receive.

buffer - Byte buffer.

Returns:

Number of items received.