Migrate to .NET 9 (#198)

src/Ryujinx.HLE/HOS/Kernel/Common/KResourceLimit.cs

@@ -2,6 +2,7 @@ using Ryujinx.Common;
 using Ryujinx.HLE.HOS.Kernel.Threading;
 using Ryujinx.Horizon.Common;
 using System.Collections.Generic;
+using System.Threading;
 
 namespace Ryujinx.HLE.HOS.Kernel.Common
 {
@@ -14,7 +15,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Common
         private readonly long[] _current2;
         private readonly long[] _peak;
 
-        private readonly object _lock;
+        private readonly object _lock = new();
 
         private readonly LinkedList<KThread> _waitingThreads;
 
@@ -27,8 +28,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Common
             _current2 = new long[(int)LimitableResource.Count];
             _peak = new long[(int)LimitableResource.Count];
 
-            _lock = new object();
-
             _waitingThreads = new LinkedList<KThread>();
         }
 

src/Ryujinx.HLE/HOS/Kernel/Memory/KCodeMemory.cs

@@ -4,6 +4,7 @@ using Ryujinx.HLE.HOS.Kernel.Process;
 using Ryujinx.Horizon.Common;
 using System;
 using System.Diagnostics;
+using System.Threading;
 
 namespace Ryujinx.HLE.HOS.Kernel.Memory
 {
@@ -11,7 +12,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
     {
         public KProcess Owner { get; private set; }
         private readonly KPageList _pageList;
-        private readonly object _lock;
+        private readonly Lock _lock = new();
         private ulong _address;
         private bool _isOwnerMapped;
         private bool _isMapped;
@@ -19,7 +20,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Memory
         public KCodeMemory(KernelContext context) : base(context)
         {
             _pageList = new KPageList();
-            _lock = new object();
         }
 
         public Result Initialize(ulong address, ulong size)

src/Ryujinx.HLE/HOS/Kernel/Process/KProcess.cs

@@ -40,8 +40,8 @@ namespace Ryujinx.HLE.HOS.Kernel.Process
 
         public ProcessState State { get; private set; }
 
-        private readonly object _processLock = new();
-        private readonly object _threadingLock = new();
+        private readonly Lock _processLock = new();
+        private readonly Lock _threadingLock = new();
 
         public KAddressArbiter AddressArbiter { get; private set; }
 

src/Ryujinx.HLE/HOS/Kernel/Threading/KAddressArbiter.cs

@@ -200,7 +200,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
 
             WakeThreads(_condVarThreads, count, TryAcquireMutex, x => x.CondVarAddress == address);
 
-            if (!_condVarThreads.Exists(x => x.CondVarAddress == address))
+            if (!_condVarThreads.Any(x => x.CondVarAddress == address))
             {
                 KernelTransfer.KernelToUser(address, 0);
             }

src/Ryujinx.HLE/HOS/Kernel/Threading/KCriticalSection.cs

@@ -5,7 +5,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
     class KCriticalSection
     {
         private readonly KernelContext _context;
-        private readonly object _lock;
+        private readonly object _lock = new();
         private int _recursionCount;
 
         public object Lock => _lock;
@@ -13,7 +13,6 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
         public KCriticalSection(KernelContext context)
         {
             _context = context;
-            _lock = new object();
         }
 
         public void Enter()

src/Ryujinx.HLE/HOS/Kernel/Threading/KThread.cs

@@ -112,7 +112,7 @@ namespace Ryujinx.HLE.HOS.Kernel.Threading
 
         public bool WaitingInArbitration { get; set; }
 
-        private readonly object _activityOperationLock = new();
+        private readonly Lock _activityOperationLock = new();
 
         public KThread(KernelContext context) : base(context)
         {