edu.rit.mp.test

Class Buf01

java.lang.Object

edu.rit.mp.Buf

edu.rit.mp.IntegerBuf

edu.rit.mp.test.Buf01

public class Buf01
extends IntegerBuf

Class Buf01 provides an integer buffer for the Send01 and Receive01 programs.

Constructor Summary

Constructors

Constructor and Description
Buf01(int theLength) Construct a new integer buffer.

Method Summary

Modifier and Type	Method and Description
int	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, int item) Store the given item in this buffer.

Methods inherited from class edu.rit.mp.IntegerBuf

buffer, buffer, buffer, buffer, buffer, buffer, colSliceBuffer, colSliceBuffers, copy, 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

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

Constructor Detail

Buf01

public Buf01(int theLength)

Construct a new integer buffer.

Parameters:

theLength - Number of items.

Throws:

java.lang.IllegalArgumentException - (unchecked exception) Thrown if theLength < 0.

Method Detail

get

public int 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.

Specified by:

get in class IntegerBuf

Parameters:

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

Returns:

Item at index i.

Throws:

java.lang.IndexOutOfBoundsException - (unchecked exception) Thrown if i is out of bounds.

put

public void put(int i,
                int 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.

Specified by:

put in class IntegerBuf

Parameters:

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

item - Item to be stored at index i.

Throws:

java.lang.IndexOutOfBoundsException - (unchecked exception) Thrown if i is out of bounds.

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).

Specified by:

getReductionBuf in class Buf

Parameters:

op - Binary operation.

Throws:

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