/*******************************************************************************
 * Copyright (c) 2007, 2018 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.db.impl.query;

import org.simantics.db.exception.DatabaseException;
import org.simantics.db.impl.graph.ReadGraphImpl;

public abstract class SyncIntProcedure implements IntProcedure, ThreadRunnable {

	int barrier = 1;

//    final private AtomicInteger barrier = new AtomicInteger(1);

    public SyncIntProcedure() {
    }

    protected final void inc() {
//        System.err.println("inc " + barrier.get());
    	++barrier;
//        barrier.incrementAndGet();
    }

    protected final void dec(ReadGraphImpl graph) throws DatabaseException {
//        System.err.println("dec " + barrier.get());
        if((--barrier) == 0) {
            run(graph);
        }
    }

    @Override
    public void exception(ReadGraphImpl graph, Throwable t) throws DatabaseException {
        throw new Error("Errors are not supported,", t);
    }

}