/*
* Licensed 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 com.facebook.presto.operator;
import com.facebook.presto.spi.Page;
import com.google.common.collect.ImmutableList;
import io.airlift.units.DataSize;
import javax.annotation.concurrent.GuardedBy;
import java.util.List;
import static com.google.common.base.Preconditions.checkState;
import static java.util.Objects.requireNonNull;
public final class NestedLoopJoinPages
{
private final TaskContext taskContext;
private final ImmutableList<Page> pages;
private final DataSize estimatedSize;
@GuardedBy("this")
private boolean freed;
NestedLoopJoinPages(List<Page> pages, DataSize estimatedSize, OperatorContext operatorContext)
{
requireNonNull(pages, "pages is null");
requireNonNull(operatorContext, "operatorContext is null");
this.pages = ImmutableList.copyOf(pages);
this.taskContext = operatorContext.getDriverContext().getPipelineContext().getTaskContext();
this.estimatedSize = requireNonNull(estimatedSize, "estimatedSize is null");
operatorContext.transferMemoryToTaskContext(estimatedSize.toBytes());
}
public List<Page> getPages()
{
return pages;
}
synchronized void freeMemory()
{
checkState(!freed, "Memory already freed");
freed = true;
taskContext.freeMemory(estimatedSize.toBytes());
}
}