// Copyright (C) 2018-2019 HuntLabs. All rights reserved.
//
// 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.

module hunt.gossip.VersionHelper;

import core.atomic;

public class VersionHelper {
    private shared static long v =0L;
    private static VersionHelper ourInstance;
 
    public static VersionHelper getInstance() {
        if(ourInstance is null)
        {
            ourInstance = new VersionHelper();
        }
        return ourInstance;
    }

    private this() {
    }

    public long nextVersion() {
        return atomicOp!"+="(VersionHelper.v,1L);
    }
}