Move solution and projects to src

src/Spv.Generator/GeneratorPool.cs

@@ -0,0 +1,58 @@
+using System.Collections.Generic;
+
+namespace Spv.Generator
+{
+    public class GeneratorPool<T> where T : class, new()
+    {
+        private List<T[]> _pool;
+        private int _chunkIndex = -1;
+        private int _poolIndex = -1;
+        private int _initialSize;
+        private int _poolSizeIncrement;
+
+        public GeneratorPool(): this(1000, 200) { }
+
+        public GeneratorPool(int chunkSizeLimit, int poolSizeIncrement)
+        {
+            _initialSize = chunkSizeLimit;
+            _poolSizeIncrement = poolSizeIncrement;
+
+            _pool = new(chunkSizeLimit * 2);
+
+            AddChunkIfNeeded();
+        }
+
+        public T Allocate()
+        {
+            if (++_poolIndex >= _poolSizeIncrement)
+            {
+                AddChunkIfNeeded();
+
+                _poolIndex = 0;
+            }
+
+            return _pool[_chunkIndex][_poolIndex];
+        }
+
+        private void AddChunkIfNeeded()
+        {
+            if (++_chunkIndex >= _pool.Count)
+            {
+                T[] pool = new T[_poolSizeIncrement];
+
+                for (int i = 0; i < _poolSizeIncrement; i++)
+                {
+                    pool[i] = new T();
+                }
+
+                _pool.Add(pool);
+            }
+        }
+
+        public void Clear()
+        {
+            _chunkIndex = 0;
+            _poolIndex = -1;
+        }
+    }
+}