Migrate to .NET 9

src/Ryujinx.Input.SDL2/Ryujinx.Input.SDL2.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
   </PropertyGroup>
 

src/Ryujinx.Input.SDL2/SDL2Gamepad.cs

@@ -4,6 +4,7 @@ using Ryujinx.Common.Logging;
 using System;
 using System.Collections.Generic;
 using System.Numerics;
+using System.Threading;
 using static SDL2.SDL;
 
 namespace Ryujinx.Input.SDL2
@@ -55,7 +56,7 @@ namespace Ryujinx.Input.SDL2
             SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_INVALID,
         };
 
-        private readonly object _userMappingLock = new();
+        private readonly Lock _userMappingLock = new();
 
         private readonly List<ButtonMappingEntry> _buttonsUserMapping;
 

src/Ryujinx.Input.SDL2/SDL2GamepadDriver.cs

@@ -1,6 +1,7 @@
 using Ryujinx.SDL2.Common;
 using System;
 using System.Collections.Generic;
+using System.Threading;
 using static SDL2.SDL;
 
 namespace Ryujinx.Input.SDL2
@@ -9,7 +10,7 @@ namespace Ryujinx.Input.SDL2
     {
         private readonly Dictionary<int, string> _gamepadsInstanceIdsMapping;
         private readonly List<string> _gamepadsIds;
-        private readonly object _lock = new object();
+        private readonly Lock _lock = new();
 
         public ReadOnlySpan<string> GamepadsIds
         {

src/Ryujinx.Input.SDL2/SDL2Keyboard.cs

@@ -4,6 +4,7 @@ using System;
 using System.Collections.Generic;
 using System.Numerics;
 using System.Runtime.CompilerServices;
+using System.Threading;
 using static SDL2.SDL;
 
 using ConfigKey = Ryujinx.Common.Configuration.Hid.Key;
@@ -17,7 +18,7 @@ namespace Ryujinx.Input.SDL2
             public bool IsValid => To is not GamepadButtonInputId.Unbound && From is not Key.Unbound;
         }
 
-        private readonly object _userMappingLock = new();
+        private readonly Lock _userMappingLock = new();
 
 #pragma warning disable IDE0052 // Remove unread private member
         private readonly SDL2KeyboardDriver _driver;