1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | using System.Collections.Generic; namespace KerbalEngineer { /// <summary> /// Pool of object /// </summary> public class Pool<T> { private readonly Stack<T> values = new Stack<T>(); private readonly CreateDelegate<T> create; private readonly ResetDelegate<T> reset; public delegate R CreateDelegate<out R>(); public delegate void ResetDelegate<in T1>(T1 a); /// <summary> /// Creates an empty pool with the specified object creation and reset delegates. /// </summary> public Pool(CreateDelegate<T> create, ResetDelegate<T> reset) { this.create = create; this.reset = reset; } /// <summary> /// Borrows an object from the pool. /// </summary> public T Borrow() { lock (values) { return values.Count > 0 ? values.Pop() : create(); } } /// <summary> /// Release an object, reset it and returns it to the pool. /// </summary> public void Release(T value) { reset(value); lock (values) { values.Push(value); } } /// <summary> /// Current size of the pool. /// </summary> public int Count() { return values.Count; } } } |