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