From 3507f862c70af74c245b4622f5ca5093fdfbc2aa Mon Sep 17 00:00:00 2001
From: Jamie Reece Wilson <me@reece.sx>
Date: Tue, 10 Oct 2023 21:42:17 +0100
Subject: [PATCH] [+] AU_DLL.h

---
 Include/AU_DLL.h | 70 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 Include/AU_DLL.h

diff --git a/Include/AU_DLL.h b/Include/AU_DLL.h
new file mode 100644
index 0000000..6ab681d
--- /dev/null
+++ b/Include/AU_DLL.h
@@ -0,0 +1,70 @@
+/***
+    Copyright (C) 2023 J Reece Wilson (a/k/a "Reece"). All rights reserved.
+
+    File: AU_DLL.h
+    Date: 2023-10-10
+    Author: Reece
+***/
+#pragma once
+
+#if defined(_AU_BUILDING_SHAREDLIB) || \
+    defined(AU_DLL_NO_SHARED_CHECK)
+
+    #if defined(AURORA_PLATFORM_WIN32)
+    
+        #if !defined(DLL_PROCESS_ATTACH)
+            #define HMODULE void *
+            #define DLL_PROCESS_ATTACH   1
+            #if !defined(TRUE)
+                #define TRUE 1
+            #endif
+        #endif
+        
+        extern "C" __declspec(dllimport) int __stdcall DisableThreadLibraryCalls(HMODULE hLibModule);
+    
+    #define AURORA_DLL_ATTACH(func)                        \
+                                                           \
+        int __stdcall DllMain(                             \
+            HMODULE hinstDLL,                              \
+            unsigned long fdwReason,                       \
+            void *lpvReserved)                             \
+        {                                                  \
+            if (fdwReason == DLL_PROCESS_ATTACH)           \
+            {                                              \
+                (void)DisableThreadLibraryCalls(hinstDLL); \
+                func();                                    \
+            }                                              \
+            return TRUE;                                   \
+        }
+        
+    #elif defined(AURORA_COMPILER_CLANG) || defined(AURORA_COMPILER_GCC)
+    
+        #define AURORA_DLL_ATTACH(func)                    \
+            __attribute__((constructor))                   \
+            static void FuncTlsHook ## __COUNTER__(void)   \
+            {                                              \
+                func();                                    \
+            }
+    
+    #elif defined(__cplusplus)
+    
+        struct TlsHook
+        {
+            TlsHook(AuVoidFunc func)
+            {
+                a = 3;
+                if (func)
+                {
+                    func();
+                }
+            }
+            AuUInt32 a;
+        };
+        
+        #define AURORA_DLL_ATTACH(func) \
+            static TlsHook gTlsHook ## __COUNTER__(func);
+        
+    #endif
+#else
+    #define AURORA_DLL_ATTACH(func)
+#endif
\ No newline at end of file