e1e30998ba
## Changes * Improves type hashing by introducing xxHash3 (64bit) * Removes individual `tdb` files in favor of a single `SerializedTypes.db` file. This file is only used to identify a type that is being deserialized, which doesn't exist. * Adds duplicate type alias detection * Adds `AssemblyHandler.FindTypeByHash` View changed files whitespaces: https://github.com/modernuo/ModernUO/pull/1172/files?diff=split&w=1 ## SerializedTypes.db The serialized types file is used to get back the original name of a type in case it no longer exists in code. This can easily be necessary if a class is renamed in code and no `TypeAlias` is provided. ### Format byte[4] - version byte[4] - count --array-- byte[8] - xxHash byte[1] - flag, 0 - null, 1 - not null byte[n] - Full class name in UTF8 ### Example <img width="472" alt="SerializedTypes_Example" src="https://user-images.githubusercontent.com/3953314/195255429-31d24293-6bd1-419e-811b-07874dd0f78d.png"> ## Benchmarks Serialized 500 Type fields. The 8192bytes comes from the _ConcurrentQueue_ that would later be used for SerializedTypes. Note that the queue is never cleared, so it's size grew considerably. ```cs | Method | Mean | Error | StdDev | Allocated | |--------------------- |---------:|---------:|---------:|----------:| | BenchmarkXXHash | 18.44 us | 0.278 us | 0.260 us | 8192 B | | BenchmarkTypeStrings | 25.09 us | 0.292 us | 0.259 us | - | ``` TODO: * Add support in the Serialization Generator for `ReadType()` and `Write(Type)` * Remove `SetTypeRef` from Serialization Generator
81 lines
2.8 KiB
C#
81 lines
2.8 KiB
C#
/*************************************************************************
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* ModernUO *
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* Copyright 2019-2022 - ModernUO Development Team *
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* Email: hi@modernuo.com *
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* File: ISerializable.cs *
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* *
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* This program is free software: you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation, either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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*************************************************************************/
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using System;
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using System.Collections.Concurrent;
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using System.IO;
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namespace Server;
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public interface ISerializable
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{
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// Should be serialized/deserialized with the index so it can be referenced by IGenericReader
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DateTime Created { get; set; }
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// Should be serialized/deserialized with the index so it can be referenced by IGenericReader
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DateTime LastSerialized { get; protected internal set; }
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long SavePosition { get; protected internal set; }
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BufferWriter SaveBuffer { get; protected internal set; }
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Serial Serial { get; }
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// Executed on every entity, before it's serialized.
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// For example, this is used to clean up weak references and mark them dirty.
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void BeforeSerialize();
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void Deserialize(IGenericReader reader);
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void Serialize(IGenericWriter writer);
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void Delete();
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bool Deleted { get; }
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public void InitializeSaveBuffer(byte[] buffer, ConcurrentQueue<Type> types)
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{
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SaveBuffer = new BufferWriter(buffer, true, types);
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if (World.DirtyTrackingEnabled)
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{
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SavePosition = SaveBuffer.Position;
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}
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else
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{
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SavePosition = -1;
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}
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}
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public void Serialize(ConcurrentQueue<Type> types)
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{
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SaveBuffer ??= new BufferWriter(true, types);
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BeforeSerialize();
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// Clean, don't bother serializing
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if (SavePosition > -1)
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{
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SaveBuffer.Seek(SavePosition, SeekOrigin.Begin);
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return;
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}
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LastSerialized = Core.Now;
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SaveBuffer.Seek(0, SeekOrigin.Begin);
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Serialize(SaveBuffer);
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if (World.DirtyTrackingEnabled)
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{
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SavePosition = SaveBuffer.Position;
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}
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else
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{
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this.MarkDirty();
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}
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}
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}
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