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ProfileRefCounts.java
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ProfileRefCounts.java
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/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.pagecache;
import org.apache.commons.lang3.mutable.MutableInt;
import java.util.HashMap;
import java.util.Map;
class ProfileRefCounts
{
private final Map<Profile,MutableInt> bag;
public ProfileRefCounts()
{
bag = new HashMap<>();
}
synchronized void incrementRefCounts( Profile[] profiles )
{
for ( Profile profile : profiles )
{
bag.computeIfAbsent( profile, p -> new MutableInt() ).increment();
}
}
synchronized void decrementRefCounts( Profile[] profiles )
{
for ( Profile profile : profiles )
{
bag.computeIfPresent( profile, ( p, i) -> i.decrementAndGet() == 0 ? null : i );
}
}
synchronized boolean contains( Profile profile )
{
return bag.containsKey( profile );
}
}