Step 2 - 地址生成与拆分

2026-04-14 00:56:38 +08:00
parent 7eab504f4a
commit 4ab93d7806
7 changed files with 266 additions and 10 deletions
@@ -0,0 +1,39 @@
+using System;
+
+namespace VMdemo.Simulation
+{
+    public class AddressGenerator
+    {
+        public const int DefaultSeed = 12345;
+
+        private readonly int _vaBits;
+        private readonly ulong _vaMask;
+        private readonly Random _random;
+        private readonly byte[] _buffer = new byte[8];
+
+        public AddressGenerator(int vaBits, int? seed = null)
+        {
+            if (vaBits != 32 && vaBits != 48 && vaBits != 64)
+            {
+                throw new ArgumentOutOfRangeException(nameof(vaBits), "vaBits 仅支持 32、48、64。");
+            }
+
+            _vaBits = vaBits;
+            _vaMask = vaBits == 64 ? ulong.MaxValue : (1UL << vaBits) - 1UL;
+            _random = new Random(seed ?? DefaultSeed);
+        }
+
+        public ulong MaxVirtualAddress => _vaMask;
+
+        public ulong NextVirtualAddress()
+        {
+            return NextRawUlong() & _vaMask;
+        }
+
+        private ulong NextRawUlong()
+        {
+            _random.NextBytes(_buffer);
+            return BitConverter.ToUInt64(_buffer, 0);
+        }
+    }
+}
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