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116 行
3.7 KiB
116 行
3.7 KiB
using System;
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using System.Collections.Generic;
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using UnityEngine.Events;
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namespace UnityEngine.Rendering
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{
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public class ObjectPool<T> where T : new()
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{
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readonly Stack<T> m_Stack = new Stack<T>();
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readonly UnityAction<T> m_ActionOnGet;
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readonly UnityAction<T> m_ActionOnRelease;
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public int countAll { get; private set; }
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public int countActive { get { return countAll - countInactive; } }
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public int countInactive { get { return m_Stack.Count; } }
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public ObjectPool(UnityAction<T> actionOnGet, UnityAction<T> actionOnRelease)
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{
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m_ActionOnGet = actionOnGet;
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m_ActionOnRelease = actionOnRelease;
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}
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public T Get()
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{
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T element;
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if (m_Stack.Count == 0)
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{
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element = new T();
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countAll++;
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}
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else
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{
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element = m_Stack.Pop();
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}
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if (m_ActionOnGet != null)
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m_ActionOnGet(element);
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return element;
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}
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public struct PooledObject : IDisposable
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{
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readonly T m_ToReturn;
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readonly ObjectPool<T> m_Pool;
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internal PooledObject(T value, ObjectPool<T> pool)
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{
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m_ToReturn = value;
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m_Pool = pool;
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}
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void IDisposable.Dispose() => m_Pool.Release(m_ToReturn);
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}
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public PooledObject Get(out T v) => new PooledObject(v = Get(), this);
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public void Release(T element)
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{
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if (m_Stack.Count > 0 && ReferenceEquals(m_Stack.Peek(), element))
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Debug.LogError("Internal error. Trying to destroy object that is already released to pool.");
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if (m_ActionOnRelease != null)
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m_ActionOnRelease(element);
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m_Stack.Push(element);
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}
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}
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public static class GenericPool<T>
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where T : new()
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{
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// Object pool to avoid allocations.
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static readonly ObjectPool<T> s_Pool = new ObjectPool<T>(null, null);
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public static T Get() => s_Pool.Get();
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public static ObjectPool<T>.PooledObject Get(out T value) => s_Pool.Get(out value);
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public static void Release(T toRelease) => s_Pool.Release(toRelease);
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}
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public static class ListPool<T>
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{
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// Object pool to avoid allocations.
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static readonly ObjectPool<List<T>> s_Pool = new ObjectPool<List<T>>(null, l => l.Clear());
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public static List<T> Get() => s_Pool.Get();
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public static ObjectPool<List<T>>.PooledObject Get(out List<T> value) => s_Pool.Get(out value);
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public static void Release(List<T> toRelease) => s_Pool.Release(toRelease);
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}
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public static class HashSetPool<T>
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{
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// Object pool to avoid allocations.
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static readonly ObjectPool<HashSet<T>> s_Pool = new ObjectPool<HashSet<T>>(null, l => l.Clear());
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public static HashSet<T> Get() => s_Pool.Get();
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public static ObjectPool<HashSet<T>>.PooledObject Get(out HashSet<T> value) => s_Pool.Get(out value);
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public static void Release(HashSet<T> toRelease) => s_Pool.Release(toRelease);
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}
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public static class DictionaryPool<TKey, TValue>
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{
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// Object pool to avoid allocations.
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static readonly ObjectPool<Dictionary<TKey, TValue>> s_Pool
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= new ObjectPool<Dictionary<TKey, TValue>>(null, l => l.Clear());
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public static Dictionary<TKey, TValue> Get() => s_Pool.Get();
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public static ObjectPool<Dictionary<TKey, TValue>>.PooledObject Get(out Dictionary<TKey, TValue> value)
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=> s_Pool.Get(out value);
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public static void Release(Dictionary<TKey, TValue> toRelease) => s_Pool.Release(toRelease);
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}
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}
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