opensim/OpenSim/Framework/ThreadSafeRandom.cs

/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSimulator Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

// legacy Use Random.Shared instead

using System;

namespace OpenSim.Framework
{
    /// <summary>
    /// A thread-safe Random since the .NET version is not.
    /// See http://msdn.microsoft.com/en-us/library/system.random%28v=vs.100%29.aspx
    /// </summary>
    public class ThreadSafeRandom : Random
    {
        private readonly object mainLock = new();
        public ThreadSafeRandom() : base() {}

        public ThreadSafeRandom(int seed): base (seed) {}

        public override int Next()
        {
            lock (mainLock)
                return base.Next();
        }

        public override int Next(int maxValue)
        {
            lock (mainLock)
                return base.Next(maxValue);
        }

        public override int Next(int minValue, int maxValue)
        {
            lock (mainLock)
                return base.Next(minValue, maxValue);
        }

        public override void NextBytes(byte[] buffer)
        {
            lock (mainLock)
                base.NextBytes(buffer);
        }

        public override double NextDouble()
        {
            lock (mainLock)
                return base.NextDouble();
        }
    }
}