edu.ucla.sspace.matrix

Interface AtomicMatrix

All Superinterfaces:

Matrix

All Known Implementing Classes:

AtomicGrowingMatrix, AtomicGrowingSparseHashMatrix, AtomicGrowingSparseMatrix, SynchronizedMatrix, SynchronizedSparseMatrix

public interface AtomicMatrix
extends Matrix

An interface for any Matrix which wants to support atomic behavior. All implementations must be thread safe such that each operation is atomic. It is acceptable for several operations to be many read, but anytime a modification operation takes place, there must be only one thread performing a modification and no other threads reading data.

Author:

David Jurgens

Nested Class Summary

Nested classes/interfaces inherited from interface edu.ucla.sspace.matrix.Matrix

Matrix.Type

Method Summary

Methods

Modifier and Type	Method and Description
double	addAndGet(int row, int col, double delta) Return the value stored at (row, col) plus delta, and then increment the specified cell by delta.
double	getAndAdd(int row, int col, double delta) Return the value stored at (row, col), and add delta to the same index.

Methods inherited from interface edu.ucla.sspace.matrix.Matrix

columns, get, getColumn, getColumnVector, getRow, getRowVector, rows, set, setColumn, setColumn, setRow, setRow, toDenseArray

Method Detail

getAndAdd

double getAndAdd(int row,
               int col,
               double delta)

Return the value stored at (row, col), and add delta to the same index.

Parameters:

row - The row of the cell to return and modify.

col - The column of the cell to return and modify.

delta - The amount to change the specified cell.

Returns:

The value of the cell at (row, col) prior to adding delta.

addAndGet

double addAndGet(int row,
               int col,
               double delta)

Return the value stored at (row, col) plus delta, and then increment the specified cell by delta.

Parameters:

row - The row of the cell to modify and return.

col - The column of the cell to modify and return.

delta - The amount to change the specified cell.

Returns:

The value of the cell at (row, col) after adding delta.