Init TEngine4.0.0

Init TEngine4.0.0

UnityProject/Packages/YooAsset/Runtime/AssetSystem/Loader/BundleLoaderBase.cs

@@ -0,0 +1,178 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace YooAsset
+{
+	internal abstract class BundleLoaderBase
+	{
+		public enum EStatus
+		{
+			None = 0,
+			Succeed,
+			Failed
+		}
+
+		/// <summary>
+		/// 所属资源系统
+		/// </summary>
+		public AssetSystemImpl Impl { private set; get; }
+
+		/// <summary>
+		/// 资源包文件信息
+		/// </summary>
+		public BundleInfo MainBundleInfo { private set; get; }
+
+		/// <summary>
+		/// 引用计数
+		/// </summary>
+		public int RefCount { private set; get; }
+
+		/// <summary>
+		/// 加载状态
+		/// </summary>
+		public EStatus Status { protected set; get; }
+
+		/// <summary>
+		/// 最近的错误信息
+		/// </summary>
+		public string LastError { protected set; get; }
+
+		/// <summary>
+		/// 是否已经销毁
+		/// </summary>
+		public bool IsDestroyed { private set; get; } = false;
+
+		private readonly List<ProviderBase> _providers = new List<ProviderBase>(100);
+		internal AssetBundle CacheBundle { set; get; }
+		internal string FileLoadPath { set; get; }
+		internal float DownloadProgress { set; get; }
+		internal ulong DownloadedBytes { set; get; }
+
+
+		public BundleLoaderBase(AssetSystemImpl impl, BundleInfo bundleInfo)
+		{
+			Impl = impl;
+			MainBundleInfo = bundleInfo;
+			RefCount = 0;
+			Status = EStatus.None;
+		}
+
+		/// <summary>
+		/// 添加附属的资源提供者
+		/// </summary>
+		public void AddProvider(ProviderBase provider)
+		{
+			if (_providers.Contains(provider) == false)
+				_providers.Add(provider);
+		}
+
+		/// <summary>
+		/// 引用（引用计数递加）
+		/// </summary>
+		public void Reference()
+		{
+			RefCount++;
+		}
+
+		/// <summary>
+		/// 释放（引用计数递减）
+		/// </summary>
+		public void Release()
+		{
+			RefCount--;
+		}
+
+		/// <summary>
+		/// 是否完毕（无论成功或失败）
+		/// </summary>
+		public bool IsDone()
+		{
+			return Status == EStatus.Succeed || Status == EStatus.Failed;
+		}
+
+		/// <summary>
+		/// 是否可以销毁
+		/// </summary>
+		public bool CanDestroy()
+		{
+			if (IsDone() == false)
+				return false;
+
+			if (RefCount > 0)
+				return false;
+
+			// 检查引用链上的资源包是否已经全部销毁
+			// 注意：互相引用的资源包无法卸载！
+			foreach (var bundleID in MainBundleInfo.Bundle.ReferenceIDs)
+			{
+				if (Impl.CheckBundleDestroyed(bundleID) == false)
+					return false;
+			}
+
+			return true;
+		}
+
+		/// <summary>
+		/// 在满足条件的前提下，销毁所有资源提供者
+		/// </summary>
+		public void TryDestroyAllProviders()
+		{
+			if (IsDone() == false)
+				return;
+
+			// 条件1：必须等待所有Provider可以销毁
+			foreach (var provider in _providers)
+			{
+				if (provider.CanDestroy() == false)
+					return;
+			}
+
+			// 条件2：除了自己没有其它引用
+			if (RefCount > _providers.Count)
+				return;
+
+			// 销毁所有Providers
+			{
+				foreach (var provider in _providers)
+				{
+					provider.Destroy();
+				}
+				Impl.RemoveBundleProviders(_providers);
+				_providers.Clear();
+			}
+		}
+
+
+		/// <summary>
+		/// 轮询更新
+		/// </summary>
+		public abstract void Update();
+
+		/// <summary>
+		/// 销毁
+		/// </summary>
+		public virtual void Destroy()
+		{
+			IsDestroyed = true;
+
+			// Check fatal
+			if (RefCount > 0)
+				throw new Exception($"Bundle file loader ref is not zero : {MainBundleInfo.Bundle.BundleName}");
+			if (IsDone() == false)
+				throw new Exception($"Bundle file loader is not done : {MainBundleInfo.Bundle.BundleName}");
+
+			if (CacheBundle != null)
+			{
+				CacheBundle.Unload(true);
+				CacheBundle = null;
+			}
+		}
+
+		/// <summary>
+		/// 主线程等待异步操作完毕
+		/// </summary>
+		public abstract void WaitForAsyncComplete();
+	}
+}