reactos/sdk/include/ddk/punknown.h

/*
    ReactOS Kernel-Mode COM
    by Andrew Greenwood

    This file is in the public domain.
*/

#ifndef _UNKNOWN_H_
#define _UNKNOWN_H_

#ifdef __cplusplus
extern "C" {
#include <wdm.h>
}
#else
#include <wdm.h>
#endif

#include <windef.h>
#define COM_NO_WINDOWS_H
#include <basetyps.h>

#ifdef PUT_GUIDS_HERE
#include <initguid.h>
#endif

/* ===============================================================
    IUnknown
*/

#ifndef __IUnknown_INTERFACE_DEFINED__
#define __IUnknown_INTERFACE_DEFINED__

DEFINE_GUID(IID_IUnknown,
    0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x46);

#undef INTERFACE
#define INTERFACE IUnknown

DECLARE_INTERFACE(IUnknown) {
  STDMETHOD_(NTSTATUS, QueryInterface)( THIS_
    _In_ REFIID,
    _COM_Outptr_ PVOID*) PURE;

  STDMETHOD_(ULONG, AddRef)( THIS ) PURE;

  STDMETHOD_(ULONG, Release)( THIS ) PURE;
};

#endif /* __IUnknown_INTERFACE_DEFINED__ */

#undef INTERFACE

typedef IUnknown *PUNKNOWN;

/* ===============================================================
    IUnknown definition
    Boilerplate code macro for use in subclassed interfaces
*/

#define DEFINE_ABSTRACT_UNKNOWN()             \
  STDMETHOD_(NTSTATUS, QueryInterface)( THIS_ \
    REFIID InterfaceId,                       \
    PVOID* Interface) PURE;                   \
                                              \
  STDMETHOD_(ULONG, AddRef)(THIS) PURE;       \
                                              \
  STDMETHOD_(ULONG, Release)(THIS) PURE;

/* ===============================================================
    Constructor callback definition
*/

typedef HRESULT
(NTAPI *PFNCREATEINSTANCE)(
  _Out_ PUNKNOWN* Unknown,
  _In_ REFCLSID ClassId,
  _In_ PUNKNOWN OuterUnknown,
  _In_ POOL_TYPE PoolType);

#endif /* _UNKNOWN_H_ */