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The Groovy and Java high-level concurrency library offering actors, dataflow, CSP, agents, parallel collections, fork/join and more

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// GPars - Groovy Parallel Systems
//
// Copyright © 2008-10  The original author or authors
//
// 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 groovyx.gpars;

import java.util.Deque;
import java.util.LinkedList;

/**
 * Holds a thread-local stack of pools to allow for nested calls to ForkJoinPool.withPool() or GParsExecutorsPool.withPool()
 *
 * @author Vaclav Pech
 *         Date: Dec 15, 2009
 */
final class ThreadLocalPools extends ThreadLocal> {

    @Override
    protected LinkedList