From 50d99bf9745591afc3320fa6ebd65c07e3cb463c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adam=20S=C5=82abo=C5=84?= <asaillen@protonmail.com>
Date: Sat, 7 Feb 2026 01:36:47 +0100
Subject: [PATCH] [OPENGL32] Misc refactoring and a bugfix for Nvidia OpenGL
 ICD (#8656)

* [OPENGL32] Use NDK definitions for list functions
* [OPENGL32] wglCreateLayerContext: Insert an entry into context list

Fixes a crash when wglDeleteContext is called on layer context.
---
 dll/opengl/opengl32/opengl32.h | 44 +++-------------------------------
 dll/opengl/opengl32/wgl.c      |  6 +++--
 2 files changed, 7 insertions(+), 43 deletions(-)

diff --git a/dll/opengl/opengl32/opengl32.h b/dll/opengl/opengl32/opengl32.h
index 0395fe00a66..ac5cb88ef83 100644
--- a/dll/opengl/opengl32/opengl32.h
+++ b/dll/opengl/opengl32/opengl32.h
@@ -21,51 +21,13 @@
 #include <pstypes.h>
 #endif
 
+#define NTOS_MODE_USER
+#include <rtlfuncs.h>
+
 #include <wine/debug.h>
 
 #include "icd.h"
 
-/* *$%$£^§! headers inclusion */
-static __inline
-BOOLEAN
-RemoveEntryList(
-    _In_ PLIST_ENTRY Entry)
-{
-    PLIST_ENTRY OldFlink;
-    PLIST_ENTRY OldBlink;
-
-    OldFlink = Entry->Flink;
-    OldBlink = Entry->Blink;
-    OldFlink->Blink = OldBlink;
-    OldBlink->Flink = OldFlink;
-    return (OldFlink == OldBlink);
-}
-
-static __inline
-VOID
-InsertTailList(
-    _In_ PLIST_ENTRY ListHead,
-    _In_ PLIST_ENTRY Entry
-)
-{
-    PLIST_ENTRY OldBlink;
-    OldBlink = ListHead->Blink;
-    Entry->Flink = ListHead;
-    Entry->Blink = OldBlink;
-    OldBlink->Flink = Entry;
-    ListHead->Blink = Entry;
-}
-
-
-static __inline
-VOID
-InitializeListHead(
-    _Inout_ PLIST_ENTRY ListHead
-)
-{
-    ListHead->Flink = ListHead->Blink = ListHead;
-}
-
 extern LIST_ENTRY ContextListHead;
 
 struct wgl_context
diff --git a/dll/opengl/opengl32/wgl.c b/dll/opengl/opengl32/wgl.c
index 2beee39c263..b495b354deb 100644
--- a/dll/opengl/opengl32/wgl.c
+++ b/dll/opengl/opengl32/wgl.c
@@ -437,11 +437,11 @@ HGLRC WINAPI wglCreateContext(HDC hdc)
     context->icd_data = dc_data->icd_data;
     context->pixelformat = dc_data->pixelformat;
     context->thread_id = 0;
+    context->magic = 'GLRC';
 
     /* Insert into the list */
     InsertTailList(&ContextListHead, &context->ListEntry);
 
-    context->magic = 'GLRC';
     TRACE("Success!\n");
     return (HGLRC)context;
 }
@@ -504,9 +504,11 @@ HGLRC WINAPI wglCreateLayerContext(HDC hdc, int iLayerPlane)
     context->icd_data = dc_data->icd_data;
     context->pixelformat = dc_data->pixelformat;
     context->thread_id = 0;
-
     context->magic = 'GLRC';
 
+    /* Insert into the list */
+    InsertTailList(&ContextListHead, &context->ListEntry);
+
     release_dc_data(dc_data);
     return (HGLRC)context;
 }