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include: Implement some small utilities in native headers (#3361) 

* Add QueryInterface template to IUnknown

As described here https://learn.microsoft.com/en-us/windows/win32/api/unknwn/nf-unknwn-iunknown-queryinterface\(q\)\?source\=recommendations

* Implement DEFINE_ENUM_FLAG_OPERATORS

* Add REFCLSID to windows_base.h

This is used by the latest d3d12 headers for D3D12GetInterface
This commit is contained in:
Ellie Hermaszewska 2023-05-03 19:39:51 +08:00 committed by GitHub
parent 9ce1c4df0d
commit b81536458f
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2 changed files with 23 additions and 1 deletions
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4
include/native/windows/unknwn.h
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@ -12,6 +12,10 @@ struct IUnknown {
public:
virtual HRESULT QueryInterface(REFIID riid, void** ppvObject) = 0;
template<class Q>
HRESULT STDMETHODCALLTYPE QueryInterface(Q **pp) {
return QueryInterface(__uuidof(Q), (void **)pp);
}
virtual ULONG AddRef() = 0;
virtual ULONG Release() = 0;

20
include/native/windows/windows_base.h
View File

@ -70,9 +70,11 @@ typedef GUID IID;
#ifdef __cplusplus
#define REFIID const IID&
#define REFGUID const GUID&
#define REFCLSID const GUID&
#else
#define REFIID const IID*
#define REFGUID const GUID*
#define REFCLSID const GUID* const
#endif // __cplusplus
#ifdef __cplusplus
@ -332,4 +334,20 @@ typedef struct RGNDATA {
#define FAILED(hr) ((HRESULT)(hr) < 0)
#define SUCCEEDED(hr) ((HRESULT)(hr) >= 0)
#define DEFINE_ENUM_FLAG_OPERATORS(T)
#ifndef DEFINE_ENUM_FLAG_OPERATORS
#ifdef __cplusplus
# define DEFINE_ENUM_FLAG_OPERATORS(type) \
extern "C++" \
{ \
inline type operator &(type x, type y) { return (type)((int)x & (int)y); } \
inline type operator &=(type &x, type y) { return (type &)((int &)x &= (int)y); } \
inline type operator ~(type x) { return (type)~(int)x; } \
inline type operator |(type x, type y) { return (type)((int)x | (int)y); } \
inline type operator |=(type &x, type y) { return (type &)((int &)x |= (int)y); } \
inline type operator ^(type x, type y) { return (type)((int)x ^ (int)y); } \
inline type operator ^=(type &x, type y) { return (type &)((int &)x ^= (int)y); } \
}
#else
# define DEFINE_ENUM_FLAG_OPERATORS(type)
#endif
#endif /* DEFINE_ENUM_FLAG_OPERATORS */