include: Add support for C compilation

misyltoad · Apr 17, 2022 · 5800044 · 5800044
1 parent a2dc99c
commit 5800044
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Showing 2 changed files with 186 additions and 116 deletions.
diff --git a/include/native/windows/unknwn.h b/include/native/windows/unknwn.h
@@ -2,7 +2,11 @@
 
 #include "windows_base.h"
 
+typedef interface IUnknown IUnknown;
+
 DEFINE_GUID(IID_IUnknown, 0x00000000,0x0000,0x0000,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46)
+
+#ifdef __cplusplus
 struct IUnknown {
 
 public:
@@ -13,6 +17,32 @@ struct IUnknown {
   virtual ULONG Release() = 0;
 
 };
+#else
+typedef struct IUnknownVtbl
+{
+BEGIN_INTERFACE
+
+  HRESULT (STDMETHODCALLTYPE *QueryInterface)(
+    IUnknown *This,
+    REFIID riid,
+    void **ppvObject
+  );
+  ULONG (STDMETHODCALLTYPE *AddRef)(IUnknown *This);
+  ULONG (STDMETHODCALLTYPE *Release)(IUnknown *This);
+
+END_INTERFACE
+} IUnknownVtbl;
+
+interface IUnknown
+{
+    CONST_VTBL struct IUnknownVtbl *lpVtbl;
+};
+
+#define IUnknown_AddRef(This) ((This)->lpVtbl->AddRef(This))
+#define IUnknown_Release(This) ((This)->lpVtbl->Release(This))
+
+#endif // __cplusplus
+
 DECLARE_UUIDOF_HELPER(IUnknown, 0x00000000,0x0000,0x0000,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46)
 
 #define IID_PPV_ARGS(ppType) __uuidof(decltype(**(ppType))), [](auto** pp) { (void)static_cast<IUnknown*>(*pp); return reinterpret_cast<void**>(pp); }(ppType)