blob: 53e91a773d5e507277ec56d823034e5640b393c6 [file] [log] [blame]
using System;
using System.Collections;
using System.Collections.Generic;
namespace Lucene.Net.Support
{
/*
* 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.
*/
internal static class SetExtensions
{
/// <summary>
/// Returns a concurrent wrapper for the current <see cref="ISet{T}"/>.
/// </summary>
/// <typeparam name="T">The type of elements in the set.</typeparam>
/// <param name="set">The collection to make concurrent (thread-safe).</param>
/// <returns>An object that acts as a read-only wrapper around the current <see cref="ISet{T}"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="set"/> is <c>null</c>.</exception>
/// <remarks>
/// To synchronize any modifications to the <see cref="ISet{T}"/> object, expose it only through this wrapper.
/// <para/>
/// The set returned uses simple locking and may not be the most performant solution, but it provides a quick
/// way to make any set thread-safe. A synchronization object is exposed through the <see cref="ICollection.SyncRoot"/>
/// property that can be used for external synchronization.
/// <para/>
/// This method is an O(1) operation.
/// </remarks>
internal static ISet<T> AsConcurrent<T>(this ISet<T> set)
{
return new ConcurrentSet<T>(set);
}
}
}