Make AppHost.Dispose more robust

src/Ryujinx.Ava/AppHost.cs

@@ -30,6 +30,7 @@ using Ryujinx.HLE.FileSystem;
 using Ryujinx.HLE.HOS;
 using Ryujinx.HLE.HOS.Services.Account.Acc;
 using Ryujinx.HLE.HOS.SystemState;
+using Ryujinx.HLE.Loaders.Processes;
 using Ryujinx.Input;
 using Ryujinx.Input.HLE;
 using Ryujinx.Ui.Common;
@@ -427,9 +428,12 @@ namespace Ryujinx.Ava
 
             _isActive = false;
 
-            // NOTE: The render loop is allowed to stay alive until the renderer itself is disposed, as it may handle resource dispose.
+            if (_renderingStarted)
-            // We only need to wait for all commands submitted during the main gpu loop to be processed.
+            {
-            _gpuDoneEvent.WaitOne();
+                // NOTE: The render loop is allowed to stay alive until the renderer itself is disposed, as it may handle resource dispose.
+                // We only need to wait for all commands submitted during the main gpu loop to be processed.
+                _gpuDoneEvent.WaitOne();
+            }
             _gpuDoneEvent.Dispose();
 
             DisplaySleep.Restore();
@@ -445,7 +449,7 @@ namespace Ryujinx.Ava
 
         private void Dispose()
         {
-            if (Device.Processes != null)
+            if (!ProcessResult.Failed.Equals(Device?.Processes?.ActiveApplication))
             {
                 _viewModel.UpdateGameMetadata(Device.Processes.ActiveApplication.ProgramIdText);
             }

src/Ryujinx.Ava/UI/ViewModels/MainWindowViewModel.cs

@@ -1488,15 +1488,12 @@ namespace Ryujinx.Ava.UI.ViewModels
                 catch (HorizonResultException ex)
                 {
                     // Apphost Cleanup
-                    AppHost = null;
                     SelectedIcon = null;
                 
                     await Dispatcher.UIThread.InvokeAsync(async () =>
                     {
                         await ContentDialogHelper.CreateErrorDialog(string.Format(LocaleManager.Instance[LocaleKeys.DialogCorruptedGameError], ex.Message));
                     });
-                    
-                    return;
                 }
                 
                 if (!isApplicationLoaded)

src/Ryujinx.HLE/Loaders/Processes/ProcessLoader.cs

@@ -24,7 +24,15 @@ namespace Ryujinx.HLE.Loaders.Processes
 
         private ulong _latestPid;
 
-        public ProcessResult ActiveApplication => _processesByPid[_latestPid];
+        public ProcessResult ActiveApplication
+        {
+            get
+            {
+                return _processesByPid.TryGetValue(_latestPid, out ProcessResult processResult)
+                    ? processResult
+                    : ProcessResult.Failed;
+            }
+        }
 
         public ProcessLoader(Switch device)
         {

src/Ryujinx.HLE/Loaders/Processes/ProcessResult.cs

@@ -6,12 +6,14 @@ using Ryujinx.Cpu;
 using Ryujinx.HLE.HOS.SystemState;
 using Ryujinx.HLE.Loaders.Processes.Extensions;
 using Ryujinx.Horizon.Common;
+using System;
 using System.Linq;
 
 namespace Ryujinx.HLE.Loaders.Processes
 {
     public class ProcessResult
     {
+
         public static ProcessResult Failed => new(null, new BlitStruct<ApplicationControlProperty>(1), false, false, null, 0, 0, 0, TitleLanguage.AmericanEnglish);
 
         private readonly byte _mainThreadPriority;
@@ -91,5 +93,46 @@ namespace Ryujinx.HLE.Loaders.Processes
 
             return true;
         }
+        
+        protected bool Equals(ProcessResult other)
+        {
+            return _mainThreadPriority == other._mainThreadPriority && _mainThreadStackSize == other._mainThreadStackSize && ProcessId == other.ProcessId && Name == other.Name && DisplayVersion == other.DisplayVersion && ProgramId == other.ProgramId && ProgramIdText == other.ProgramIdText && Is64Bit == other.Is64Bit && DiskCacheEnabled == other.DiskCacheEnabled && AllowCodeMemoryForJit == other.AllowCodeMemoryForJit;
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj))
+            {
+                return false;
+            }
+
+            if (ReferenceEquals(this, obj))
+            {
+                return true;
+            }
+
+            if (obj.GetType() != this.GetType())
+            {
+                return false;
+            }
+
+            return Equals((ProcessResult)obj);
+        }
+
+        public override int GetHashCode()
+        {
+            HashCode hashCode = new HashCode();
+            hashCode.Add(_mainThreadPriority);
+            hashCode.Add(_mainThreadStackSize);
+            hashCode.Add(ProcessId);
+            hashCode.Add(Name);
+            hashCode.Add(DisplayVersion);
+            hashCode.Add(ProgramId);
+            hashCode.Add(ProgramIdText);
+            hashCode.Add(Is64Bit);
+            hashCode.Add(DiskCacheEnabled);
+            hashCode.Add(AllowCodeMemoryForJit);
+            return hashCode.ToHashCode();
+        }
     }
 }