Fix warning

MareSynchronos/Interop/Ipc/RedrawManager.cs

@@ -1,19 +1,20 @@
 using Dalamud.Game.ClientState.Objects.Types;
+using System;
 using MareSynchronos.PlayerData.Handlers;
 using MareSynchronos.Services;
 using MareSynchronos.Services.Mediator;
-using MareSynchronos.Utils;
 using Microsoft.Extensions.Logging;
 using System.Collections.Concurrent;
 
 namespace MareSynchronos.Interop.Ipc;
 
-public class RedrawManager
+public class RedrawManager : IDisposable
 {
     private readonly MareMediator _mareMediator;
     private readonly DalamudUtilService _dalamudUtil;
     private readonly ConcurrentDictionary<nint, bool> _penumbraRedrawRequests = [];
-    private CancellationTokenSource _disposalCts = new();
+    private CancellationTokenSource? _disposalCts = new();
+    private bool _disposed;
 
     public SemaphoreSlim RedrawSemaphore { get; init; } = new(2, 2);
 
@@ -32,12 +33,12 @@ public class RedrawManager
         try
         {
             using CancellationTokenSource cancelToken = new CancellationTokenSource();
-            using CancellationTokenSource combinedCts = CancellationTokenSource.CreateLinkedTokenSource(cancelToken.Token, token, _disposalCts.Token);
+            using CancellationTokenSource combinedCts = CancellationTokenSource.CreateLinkedTokenSource(cancelToken.Token, token, EnsureFreshCts(ref _disposalCts).Token);
             var combinedToken = combinedCts.Token;
             cancelToken.CancelAfter(TimeSpan.FromSeconds(15));
             await handler.ActOnFrameworkAfterEnsureNoDrawAsync(action, combinedToken).ConfigureAwait(false);
 
-            if (!_disposalCts.Token.IsCancellationRequested)
+            if (!_disposalCts!.Token.IsCancellationRequested)
                 await _dalamudUtil.WaitWhileCharacterIsDrawing(logger, handler, applicationId, 30000, combinedToken).ConfigureAwait(false);
         }
         finally
@@ -49,6 +50,45 @@ public class RedrawManager
 
     internal void Cancel()
     {
-        _disposalCts = _disposalCts.CancelRecreate();
+        EnsureFreshCts(ref _disposalCts);
+    }
+
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
+
+    protected virtual void Dispose(bool disposing)
+    {
+        if (_disposed) return;
+        if (disposing)
+        {
+            CancelAndDispose(ref _disposalCts);
+        }
+
+        _disposed = true;
+    }
+
+    private static CancellationTokenSource EnsureFreshCts(ref CancellationTokenSource? cts)
+    {
+        CancelAndDispose(ref cts);
+        cts = new CancellationTokenSource();
+        return cts;
+    }
+
+    private static void CancelAndDispose(ref CancellationTokenSource? cts)
+    {
+        if (cts == null) return;
+        try
+        {
+            cts.Cancel();
+        }
+        catch (ObjectDisposedException)
+        {
+        }
+
+        cts.Dispose();
+        cts = null;
     }
 }