IUnknown.h

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//
//
#ifndef _INC_IUnknown_H
#define _INC_IUnknown_H
#ifndef NO_PRAGMA_ONCE
#pragma once
#endif
 
#include "HResult.h"
 
#ifdef _WIN32
#include <Unknwn.h>     // IUnknown __IUnknown_INTERFACE_DEFINED__ IClassFactory
#endif
 
#ifndef DECLSPEC_UUID
#define DECLSPEC_UUID(x)
#endif
 
#ifdef __GNUC__
#define __uuidof(x) IID_##x     // IID_IUnknown == __uuidof(IUnknown) . This doesn't work in templates of course.
#ifndef MIDL_INTERFACE
#define MIDL_INTERFACE(a)       interface // assume we get struct DECLSPEC_UUID(x) DECLSPEC_NOVTABLE and will support IUnknown. Similar to DECLARE_INTERFACE
#endif
#endif
 
// #define GRAY_GUID_POSTFIX_S "-0000-0000-C000-100000000046"           // Use this GUID postfix for all but first 4 bytes. (8 hex digits)
 
#ifndef GUID_DEFINED
#define GUID_DEFINED
typedef struct _GUID
{
public:
        inline bool operator == ( const _GUID& other ) const
        {
                return ! ::memcmp( this, &other, sizeof(other));
        }
public:
        UINT32 Data1;
        WORD Data2;
        WORD Data3;
        BYTE Data4[8];
} GUID;
#endif
 
#ifdef __linux__
#define STDMETHOD(method)               virtual HRESULT _stdcall method
#define STDMETHOD_(type,method) virtual type _stdcall method
#define STDMETHODIMP            HRESULT _stdcall
#define STDMETHODIMP_(type)     type _stdcall
#define __RPC_FAR               // only used for _MSC_VER ?
 
#define DECLSPEC_UUID(x)                //__declspec(uuid(x))
#endif // __linux__
 
#if ! defined(__IUnknown_INTERFACE_DEFINED__)
#define __IUnknown_INTERFACE_DEFINED__
 
typedef GUID IID;
extern GRAYCORE_LINK GUID IID_IUnknown;
 
MIDL_INTERFACE("00000000-0000-0000-C000-000000000046") IUnknown
{
        STDMETHOD(QueryInterface)( /* [in] */ const IID& riid, /* [iid_is][out] */ void**ppvObject ) = 0;
        STDMETHOD_(ULONG,AddRef)(void) = 0;
        STDMETHOD_(ULONG, Release)(void) = 0;
};
 
#endif // __IUnknown_INTERFACE_DEFINED__
 
#if 1
 
 
#define IUNKNOWN_DISAMBIG_R(TYPE) \
        STDMETHOD_(ULONG,AddRef)(void) override /* disambiguate.*/ \
        { return TYPE::AddRef(); } \
        STDMETHOD_(ULONG, Release)(void) override /* disambiguate.*/\
        { return TYPE::Release(); }
 
// IUNKNOWN_DISAMBIG_R and the QueryInterface() call. use this TYPE.
#define IUNKNOWN_DISAMBIG(TYPE) STDMETHOD(QueryInterface)( /* [in] */ const IID& riid, /* [iid_is][out] */ void __RPC_FAR* __RPC_FAR* ppvObject ) override \
        { return TYPE::QueryInterface(riid,ppvObject); } \
        IUNKNOWN_DISAMBIG_R(TYPE);
 
#else
 
#define IUNKNOWN_DISAMBIG_R(TYPE)
#define IUNKNOWN_DISAMBIG(TYPE) 
#endif
 
#endif // _INC_IUnknown_H