edu.rit.mp.buf

Class LongItemBuf

java.lang.Object

edu.rit.mp.Buf

edu.rit.mp.LongBuf

edu.rit.mp.buf.LongItemBuf

public class LongItemBuf
extends LongBuf

Class LongItemBuf provides a buffer for a single long item sent or received using the Message Protocol (MP). While an instance of class LongItemBuf may be constructed directly, normally you will use a factory method in class LongBuf. See that class for further information.

Field Summary

Fields

Modifier and Type	Field and Description
long	item Long item to be sent or received.

Constructor Summary

Constructors

Constructor and Description
LongItemBuf() Construct a new long item buffer.
LongItemBuf(long item) Construct a new long item buffer with the given initial value.

Method Summary

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

Methods inherited from class edu.rit.mp.LongBuf

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

Field Detail

item

public long item

Long item to be sent or received.

Constructor Detail

LongItemBuf

public LongItemBuf()

Construct a new long item buffer.

LongItemBuf

public LongItemBuf(long item)

Construct a new long item buffer with the given initial value.

Parameters:

item - Initial value of the item field.

Method Detail

get

public long 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 LongBuf

Parameters:

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

Returns:

Item at index i.

put

public void put(int i,
                long 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 LongBuf

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.

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.