Add MotionCache.

Assets/Cryville/Crtr/Event/MotionCache.cs

@@ -0,0 +1,55 @@
+using Cryville.Common;
+using Cryville.Common.Buffers;
+using System.Collections.Generic;
+
+namespace Cryville.Crtr.Event {
+	internal class MotionCache {
+		public bool Valid { get; set; }
+		public Vector Value { get; set; }
+		public void CopyTo(MotionCache dest) {
+			dest.Valid = Valid;
+			Value.CopyTo(dest.Value);
+		}
+	}
+	internal class MotionCachePool {
+		private class Bucket : ObjectPool<MotionCache> {
+			readonly MotionRegistry _reg;
+			public Bucket(string name, int capacity) : base(capacity) {
+				_reg = ChartPlayer.motionRegistry[name];
+			}
+			protected override MotionCache Construct() {
+				var result = new MotionCache();
+				result.Value = (Vector)ReflectionHelper.InvokeEmptyConstructor(_reg.Type);
+				return result;
+			}
+		}
+		static Dictionary<Identifier, Bucket> _buckets;
+		public static void Prepare() {
+			_buckets = new Dictionary<Identifier, Bucket>(ChartPlayer.motionRegistry.Count);
+			foreach (var reg in ChartPlayer.motionRegistry)
+				_buckets.Add(reg.Key, new Bucket(reg.Key, 4096));
+		}
+
+		static readonly SimpleObjectPool<Dictionary<MotionCache, Identifier>> _dictPool
+			= new SimpleObjectPool<Dictionary<MotionCache, Identifier>>(1024);
+		Dictionary<MotionCache, Identifier> _rented;
+		public MotionCache Rent(Identifier name) {
+			var obj = _buckets[name].Rent();
+			obj.Valid = false;
+			if (_rented == null) _rented = _dictPool.Rent();
+			_rented.Add(obj, name);
+			return obj;
+		}
+		public void Return(MotionCache obj) {
+			_buckets[_rented[obj]].Return(obj);
+			_rented.Remove(obj);
+		}
+		public void ReturnAll() {
+			if (_rented == null) return;
+			foreach (var obj in _rented)
+				_buckets[obj.Value].Return(obj.Key);
+			_rented.Clear();
+			_dictPool.Return(_rented);
+		}
+	}
+}