From fe1a11908e0cbd03c5e193a59a94a5f49b8ba7a1 Mon Sep 17 00:00:00 2001
From: reuk <reuk@users.noreply.github.com>
Date: Thu, 20 Jun 2024 12:27:54 +0100
Subject: [PATCH] Direct2D: Fix data race when creating Direct2DPixelData
 instances on a background thread

---
 modules/juce_graphics/native/juce_DirectX_windows.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/modules/juce_graphics/native/juce_DirectX_windows.h b/modules/juce_graphics/native/juce_DirectX_windows.h
index 09ce70b490..6e422459ef 100644
--- a/modules/juce_graphics/native/juce_DirectX_windows.h
+++ b/modules/juce_graphics/native/juce_DirectX_windows.h
@@ -241,7 +241,10 @@ private:
     }
 
     ComSmartPtr<ID2D1Factory2> d2dFactory;
-    ListenerList<DxgiAdapterListener> listeners;
+
+    // It's possible that we'll need to add/remove listeners from background threads, especially in
+    // the case that Images are created on a background thread.
+    ThreadSafeListenerList<DxgiAdapterListener> listeners;
     ComSmartPtr<IDXGIFactory2> factory = makeDxgiFactory();
     ReferenceCountedArray<DxgiAdapter> adapterArray;
 };