initial commit

2026-08-27 11:22:16 -06:00
commit 96afff7a83
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+using System;
+using System.Security.Cryptography;
+
+namespace Quasar.Common.Utilities
+{
+    /// <summary>
+    /// Thread-safe random number generator.
+    /// Has same API as System.Random but is thread safe, similar to the implementation by Steven Toub: http://blogs.msdn.com/b/pfxteam/archive/2014/10/20/9434171.aspx
+    /// </summary>
+    public class SafeRandom
+    {
+        private static readonly RandomNumberGenerator GlobalCryptoProvider = RandomNumberGenerator.Create();
+
+        [ThreadStatic]
+        private static Random _random;
+
+        private static Random GetRandom()
+        {
+            if (_random == null)
+            {
+                byte[] buffer = new byte[4];
+                GlobalCryptoProvider.GetBytes(buffer);
+                _random = new Random(BitConverter.ToInt32(buffer, 0));
+            }
+
+            return _random;
+        }
+
+        public int Next()
+        {
+            return GetRandom().Next();
+        }
+
+        public int Next(int maxValue)
+        {
+            return GetRandom().Next(maxValue);
+        }
+
+        public int Next(int minValue, int maxValue)
+        {
+            return GetRandom().Next(minValue, maxValue);
+        }
+
+        public void NextBytes(byte[] buffer)
+        {
+            GetRandom().NextBytes(buffer);
+        }
+
+        public double NextDouble()
+        {
+            return GetRandom().NextDouble();
+        }
+    }
+}