From 88bc5bd142d12b81af275290db71171c88d557be Mon Sep 17 00:00:00 2001
From: neuecc <ils@neue.cc>
Date: Sun, 7 Jan 2024 01:06:44 +0900
Subject: [PATCH] remove logger dependency

---
 sandbox/ConsoleApp1/Program.cs |  2 +-
 src/R3/ObservableSystem.cs     | 34 ++++------------------------------
 src/R3/R3.csproj               |  8 +++++++-
 src/R3/SubscriptionTracker.cs  |  7 +------
 4 files changed, 13 insertions(+), 38 deletions(-)

diff --git a/sandbox/ConsoleApp1/Program.cs b/sandbox/ConsoleApp1/Program.cs
index 5011213f..0b317b98 100644
--- a/sandbox/ConsoleApp1/Program.cs
+++ b/sandbox/ConsoleApp1/Program.cs
@@ -14,7 +14,7 @@
     x.SetMinimumLevel(LogLevel.Trace);
     x.AddZLoggerConsole();
 });
-ObservableSystem.Logger = factory.CreateLogger<ObservableSystem>();
+// ObservableSystem.Logger = factory.CreateLogger<ObservableSystem>();
 var logger = factory.CreateLogger<Program>();
 
 
diff --git a/src/R3/ObservableSystem.cs b/src/R3/ObservableSystem.cs
index c730ac0e..ffd5cc32 100644
--- a/src/R3/ObservableSystem.cs
+++ b/src/R3/ObservableSystem.cs
@@ -1,17 +1,11 @@
-using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Abstractions;
-using static Microsoft.Extensions.Logging.LogLevel;
-
-namespace R3;
+namespace R3;
 
 public class ObservableSystem
 {
-    public static ILogger<ObservableSystem> Logger { get; set; } = NullLogger<ObservableSystem>.Instance;
-
     public static TimeProvider DefaultTimeProvider { get; set; } = TimeProvider.System;
     public static FrameProvider DefaultFrameProvider { get; set; } = new NotSupportedFrameProvider();
 
-    static Action<Exception> unhandledException = WriteLog;
+    static Action<Exception> unhandledException = DefaultUnhandledExceptionHandler;
 
     // Prevent +=, use Set and Get method.
     public static void RegisterUnhandledExceptionHandler(Action<Exception> unhandledExceptionHandler)
@@ -24,16 +18,9 @@ public static Action<Exception> GetUnhandledExceptionHandler()
         return unhandledException;
     }
 
-    static void WriteLog(Exception exception)
+    static void DefaultUnhandledExceptionHandler(Exception exception)
     {
-        if (Logger == NullLogger<ObservableSystem>.Instance)
-        {
-            Console.WriteLine("R3 UnhandleException: " + exception.ToString());
-        }
-        else
-        {
-            Logger.UnhandledException(exception);
-        }
+        Console.WriteLine("R3 UnhandleException: " + exception.ToString());
     }
 }
 
@@ -49,16 +36,3 @@ public override void Register(IFrameRunnerWorkItem callback)
         throw new NotSupportedException("ObservableSystem.DefaultFrameProvider is not set. Please set ObservableSystem.DefaultFrameProvider to a valid FrameProvider(ThreadSleepFrameProvider, etc...).");
     }
 }
-
-internal static partial class SystemLoggerExtensions
-{
-    [LoggerMessage(Trace, "Add subscription tracking TrackingId: {TrackingId}.")]
-    public static partial void AddTracking(this ILogger<ObservableSystem> logger, int trackingId);
-
-    [LoggerMessage(Trace, "Remove subscription TrackingId: {TrackingId}.")]
-    public static partial void RemoveTracking(this ILogger<ObservableSystem> logger, int trackingId);
-
-    [LoggerMessage(Error, "R3 EventSystem received unhandled exception.")]
-    public static partial void UnhandledException(this ILogger<ObservableSystem> logger, Exception exception);
-
-}
diff --git a/src/R3/R3.csproj b/src/R3/R3.csproj
index c1e31b8d..04a431d0 100644
--- a/src/R3/R3.csproj
+++ b/src/R3/R3.csproj
@@ -20,7 +20,6 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
         <PackageReference Include="PolySharp" Version="1.14.1">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
@@ -31,9 +30,16 @@
         <PackageReference Include="Microsoft.Bcl.TimeProvider" Version="8.0.0" />
     </ItemGroup>
 
+    <ItemGroup Condition="$(TargetFramework) == 'netstandard2.0'">
+        <PackageReference Include="System.Buffers" Version="4.5.1" />
+        <PackageReference Include="System.Memory" Version="4.5.5" />
+
+    </ItemGroup>
+
     <ItemGroup Condition="$(TargetFramework) == 'netstandard2.0' Or $(TargetFramework) == 'netstandard2.1'">
         <PackageReference Include="Microsoft.Bcl.TimeProvider" Version="8.0.0" />
         <PackageReference Include="System.Threading.Channels" Version="8.0.0" />
+        <PackageReference Include="System.Runtime.CompilerServices.Unsafe" Version="6.0.0" />
     </ItemGroup>
 
     <ItemGroup>
diff --git a/src/R3/SubscriptionTracker.cs b/src/R3/SubscriptionTracker.cs
index ad87c8df..860ab5e3 100644
--- a/src/R3/SubscriptionTracker.cs
+++ b/src/R3/SubscriptionTracker.cs
@@ -1,9 +1,6 @@
-using Microsoft.Extensions.Logging;
-using R3.Internal;
-using System.Diagnostics;
+using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
 using System.Text;
 
 namespace R3;
@@ -65,7 +62,6 @@ internal static bool TryTrackActiveSubscriptionCore(IDisposable subscription, in
 
         var id = Interlocked.Increment(ref trackingIdCounter);
         trackableDisposable = new TrackableDisposable(subscription, id);
-        ObservableSystem.Logger.AddTracking(id);
         tracking.TryAdd(trackableDisposable, new TrackingState(id, typeName, DateTime.Now, stackTrace)); // use local now.
 
         return true;
@@ -167,7 +163,6 @@ public void Dispose()
         var field = Interlocked.CompareExchange(ref disposed, 1, 0);
         if (field == 0)
         {
-            ObservableSystem.Logger.RemoveTracking(trackingId);
             SubscriptionTracker.RemoveTracking(this);
         }