nd4j/nd4j-backends/nd4j-api-parent/nd4j-api/src/main/java/org/nd4j/autodiff/samediff/array/ThreadSafeArrayHolder.java
/*
* ******************************************************************************
* *
* *
* * This program and the accompanying materials are made available under the
* * terms of the Apache License, Version 2.0 which is available at
* * https://www.apache.org/licenses/LICENSE-2.0.
* *
* * See the NOTICE file distributed with this work for additional
* * information regarding copyright ownership.
* * 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.
* *
* * SPDX-License-Identifier: Apache-2.0
* *****************************************************************************
*/
package org.nd4j.autodiff.samediff.array;
import lombok.NonNull;
import org.nd4j.autodiff.samediff.ArrayHolder;
import org.nd4j.linalg.api.buffer.DataType;
import org.nd4j.linalg.api.ndarray.INDArray;
import org.nd4j.linalg.util.DeviceLocalNDArray;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class ThreadSafeArrayHolder implements ArrayHolder {
private final Map<String, DeviceLocalNDArray> map = new ConcurrentHashMap<>();
private final boolean lazyInit;
/**
* @param lazyInit If true: use lazy initialization for {@link DeviceLocalNDArray}
*/
public ThreadSafeArrayHolder(boolean lazyInit) {
this.lazyInit = lazyInit;
}
@Override
public boolean hasArray(@NonNull String name) {
return map.containsKey(name);
}
@Override
public INDArray getArray(@NonNull String name) {
if(!map.containsKey(name))
return null;
return map.get(name).get();
}
@Override
public void setArray(@NonNull String name, @NonNull INDArray array) {
if (array.isView())
array = array.dup(); //Device local doesn't support views
if (!map.containsKey(name)) {
INDArray toBroadcast = array.dataType() == DataType.UTF8 ? array.dup() : array;
DeviceLocalNDArray dla = new DeviceLocalNDArray(toBroadcast, lazyInit);
map.put(name, dla);
} else {
DeviceLocalNDArray dla = map.get(name);
dla.update(array);
}
}
@Override
public INDArray removeArray(@NonNull String name) {
DeviceLocalNDArray arr = map.remove(name);
if (arr == null)
return null;
return arr.get();
}
@Override
public int size() {
return map.size();
}
@Override
public void initFrom(ArrayHolder arrayHolder) {
map.clear();
Collection<String> names = arrayHolder.arrayNames();
for (String n : names) {
setArray(n, arrayHolder.getArray(n));
}
}
@Override
public Collection<String> arrayNames() {
return Collections.unmodifiableCollection(map.keySet());
}
@Override
public void rename(@NonNull String from, @NonNull String to) {
DeviceLocalNDArray dl = map.remove(from);
map.put(to, dl);
}
}