/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.ignite.ml.math.impls.storage.matrix;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import org.apache.ignite.internal.util.GridUnsafe;
import org.apache.ignite.ml.math.MatrixStorage;
/**
* Local, dense off-heap matrix storage.
*/
public class DenseOffHeapMatrixStorage implements MatrixStorage {
/** */
private int rows;
/** */
private int cols;
/** */
private transient long ptr;
//TODO: temp solution.
/** */
private int ptrInitHash;
/** */
public DenseOffHeapMatrixStorage() {
// No-op.
}
/**
* @param rows Amount of rows in the matrix.
* @param cols Amount of columns in the matrix.
*/
public DenseOffHeapMatrixStorage(int rows, int cols) {
assert rows > 0;
assert cols > 0;
this.rows = rows;
this.cols = cols;
allocateMemory(rows, cols);
}
/**
* @param data Backing data array.
*/
public DenseOffHeapMatrixStorage(double[][] data) {
assert data != null;
assert data[0] != null;
this.rows = data.length;
this.cols = data[0].length;
assert rows > 0;
assert cols > 0;
allocateMemory(rows, cols);
for (int i = 0; i < rows; i++)
for (int j = 0; j < cols; j++)
set(i, j, data[i][j]);
}
/** {@inheritDoc} */
@Override public double get(int x, int y) {
return GridUnsafe.getDouble(pointerOffset(x, y));
}
/** {@inheritDoc} */
@Override public void set(int x, int y, double v) {
GridUnsafe.putDouble(pointerOffset(x, y), v);
}
/** {@inheritDoc} */
@Override public int columnSize() {
return cols;
}
/** {@inheritDoc} */
@Override public boolean isSequentialAccess() {
return false;
}
/** {@inheritDoc} */
@Override public boolean isDense() {
return true;
}
/** {@inheritDoc} */
@Override public boolean isRandomAccess() {
return true;
}
/** {@inheritDoc} */
@Override public boolean isDistributed() {
return false;
}
/** {@inheritDoc} */
@Override public int rowSize() {
return rows;
}
/** {@inheritDoc} */
@Override public boolean isArrayBased() {
return false;
}
/** {@inheritDoc} */
@Override public double[][] data() {
return null;
}
/** {@inheritDoc} */
@Override public void writeExternal(ObjectOutput out) throws IOException {
out.writeInt(rows);
out.writeInt(cols);
out.writeInt(ptrInitHash);
for (int i = 0; i < rows; i++)
for (int j = 0; j < cols; j++)
out.writeDouble(get(i, j));
}
/** {@inheritDoc} */
@Override public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
rows = in.readInt();
cols = in.readInt();
allocateMemory(rows, cols);
ptrInitHash = in.readInt();
for (int i = 0; i < rows; i++)
for (int j = 0; j < cols; j++)
set(i, j, in.readDouble());
}
/** {@inheritDoc} */
@Override public void destroy() {
GridUnsafe.freeMemory(ptr);
}
/** */
private long pointerOffset(int x, int y) {
return ptr + x * cols * Double.BYTES + y * Double.BYTES;
}
/** {@inheritDoc} */
@Override public boolean equals(Object obj) {
return obj != null &&
getClass().equals(obj.getClass()) &&
(rows == ((DenseOffHeapMatrixStorage)obj).rows) &&
(cols == ((DenseOffHeapMatrixStorage)obj).cols) &&
(rows == 0 || cols == 0 || ptr == ((DenseOffHeapMatrixStorage)obj).ptr || isMemoryEquals((DenseOffHeapMatrixStorage)obj));
}
/** {@inheritDoc} */
@Override public int hashCode() {
int res = 1;
res = res * 37 + rows;
res = res * 37 + cols;
res = res * 37 + ptrInitHash;
return res;
}
/** */
private boolean isMemoryEquals(DenseOffHeapMatrixStorage otherStorage) {
boolean res = true;
for (int i = 0; i < otherStorage.rows; i++) {
for (int j = 0; j < otherStorage.cols; j++) {
if (Double.compare(get(i, j), otherStorage.get(i, j)) != 0) {
res = false;
break;
}
}
}
return res;
}
/** */
private void allocateMemory(int rows, int cols) {
ptr = GridUnsafe.allocateMemory(rows * cols * Double.BYTES);
ptrInitHash = Long.hashCode(ptr);
}
}