dlls/quartz/iunk.h

   1 /*
   2  * An implementation of IUnknown.
   3  *
   4  * hidenori@a2.ctktv.ne.jp
   5  */
   6
   7 #ifndef WINE_DSHOW_IUNK_H
   8 #define WINE_DSHOW_IUNK_H
   9
  10 /*
  11         To avoid implementing IUnknown for all interfaces,
  12
  13   1) To give a method to get rel-offset of IUnknown.
  14   2) The IUnknown knows all IIDs and offsets of interfaces.
  15
  16     So each implementation must have following two members
  17     with the following order:
  18
  19   typedef struct IDispatchImpl
  20   {
  21     ICOM_VFIELD(IDispatch);     <-pointer of the interface.
  22     size_t      ofsIUnknown;    <-ofs<IDispatchImpl> - ofs<QUARTZ_IUnkImpl>
  23   };
  24
  25  */
  26
  27 typedef struct QUARTZ_IFEntry
  28 {
  29         REFIID          piid;           /* interface ID. */
  30         size_t          ofsVTPtr;       /* offset from IUnknown. */
  31 } QUARTZ_IFEntry;
  32
  33 typedef struct QUARTZ_IUnkImpl
  34 {
  35         /* pointer of IUnknown interface. */
  36         ICOM_VFIELD(IUnknown);
  37
  38         /* array of supported IIDs and offsets. */
  39         const QUARTZ_IFEntry*   pEntries;
  40         DWORD   dwEntries;
  41
  42         /* IUnknown fields. */
  43         ULONG   ref;
  44 } QUARTZ_IUnkImpl;
  45
  46
  47 void QUARTZ_IUnkInit( QUARTZ_IUnkImpl* pImpl );
  48
  49
  50 #endif  /* WINE_DSHOW_IUNK_H */