| // $Id$ |
| // |
| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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. |
| // |
| using System; |
| using System.Runtime.CompilerServices; |
| |
| namespace Org.Apache.Etch.Bindings.Csharp.Util |
| { |
| /// <summary> |
| /// Synchronously generates long id numbers. |
| /// </summary> |
| public sealed class IdGenerator |
| { |
| /// <summary> |
| /// Constructs the IdGenerator with the default starting point of 1 |
| /// and the default stride of 1. |
| /// </summary> |
| public IdGenerator() : this( 1, 1 ) |
| { |
| |
| } |
| |
| /// <summary> |
| /// Constructs the IdGenerator with the specified starting point |
| /// and the default stride of 1. |
| /// </summary> |
| /// <param name="nextId"></param> |
| public IdGenerator( long nextId ) : this( nextId, 1 ) |
| { |
| |
| } |
| |
| /// <summary> |
| /// Constructs the IdGenerator with the specified starting point |
| /// and the specified stride. |
| /// </summary> |
| /// <param name="nextId"></param> |
| /// <param name="stride"></param> |
| public IdGenerator( long nextId, int stride ) |
| { |
| if ( stride <= 0 ) |
| throw new ArgumentException( "stride <= 0" ); |
| |
| this.nextId = nextId; |
| this.stride = stride; |
| } |
| |
| private long nextId; |
| |
| private readonly int stride; |
| |
| /// <summary> |
| /// |
| /// </summary> |
| /// <returns>The next Id in sequence</returns> |
| [MethodImpl(MethodImplOptions.Synchronized)] |
| public long Next() |
| { |
| long id = nextId; |
| nextId += stride; |
| return id; |
| } |
| |
| } |
| } |