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200 lines
7.5 KiB
200 lines
7.5 KiB
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/*++
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Copyright (c) 1996-1999 Microsoft Corporation
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Module Name
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gdxlocal.h
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Abstract:
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Author:
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Mark Enstrom (marke) 23-Jun-1996
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Enviornment:
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User Mode
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Revision History:
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--*/
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extern PGDI_SHARED_MEMORY pGdiSharedMemory;
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extern PDEVCAPS pGdiDevCaps;
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extern PENTRY pGdiSharedHandleTable;
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extern W32PID gW32PID;
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#define HANDLE_TO_INDEX(h) (ULONG)h & 0x0000ffff
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HANDLE GdiFixUpHandle(HANDLE h);
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/******************************Public*Macro********************************\
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*
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* PSHARED_GET_VALIDATE
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*
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* Validate all handle information, return user pointer if the handle
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* is valid or NULL otherwise.
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*
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* Arguments:
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*
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* p - pointer to assign to pUser is successful
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* h - handle to object
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* iType - handle type
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*
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\**************************************************************************/
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#define PSHARED_GET_VALIDATE(p,h,iType) \
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{ \
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UINT uiIndex = HANDLE_TO_INDEX(h); \
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p = NULL; \
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\
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if (uiIndex < MAX_HANDLE_COUNT) \
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{ \
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PENTRY pentry = &pGdiSharedHandleTable[uiIndex]; \
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\
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if ( \
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(pentry->Objt == iType) && \
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(pentry->FullUnique == ((ULONG)h >> 16)) && \
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(pentry->ObjectOwner.Share.Pid == gW32PID) \
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) \
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{ \
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p = pentry->pUser; \
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} \
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} \
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}
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#define VALIDATE_HANDLE(bRet, h,iType) \
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{ \
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UINT uiIndex = HANDLE_TO_INDEX(h); \
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bRet = FALSE; \
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\
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if (uiIndex < MAX_HANDLE_COUNT) \
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{ \
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PENTRY pentry = &pGdiSharedHandleTable[uiIndex]; \
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\
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if ( \
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(pentry->Objt == iType) && \
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(pentry->FullUnique == ((ULONG)h >> 16)) && \
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((pentry->ObjectOwner.Share.Pid == gW32PID) || \
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(pentry->ObjectOwner.Share.Pid == 0)) \
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) \
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{ \
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bRet = TRUE; \
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} \
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} \
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}
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/******************************Public*Macros******************************\
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* FIXUP_HANDLE(h) and FIXUP_HANDLEZ(h)
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*
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* check to see if the handle has been truncated.
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* FIXUP_HANDLEZ() adds an extra check to allow NULL.
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*
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* Arguments:
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* h - handle to be checked and fix
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*
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* Return Value:
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*
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* History:
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*
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* 25-Jan-1996 -by- Lingyun Wang [lingyunw]
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*
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\**************************************************************************/
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#define HANDLE_FIXUP 0
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#if DBG
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extern INT gbCheckHandleLevel;
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#endif
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#define NEEDS_FIXING(h) (!((ULONG)h & 0xffff0000))
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#if DBG
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#define HANDLE_WARNING() \
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{ \
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if (gbCheckHandleLevel == 1) \
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{ \
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WARNING ("truncated handle\n"); \
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} \
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ASSERTGDI (gbCheckHandleLevel != 2, "truncated handle\n"); \
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}
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#else
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#define HANDLE_WARNING()
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#endif
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#if DBG
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#define CHECK_HANDLE_WARNING(h, bZ) \
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{ \
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BOOL bFIX = NEEDS_FIXING(h); \
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\
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if (bZ) bFIX = h && bFIX; \
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\
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if (bFIX) \
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{ \
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if (gbCheckHandleLevel == 1) \
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{ \
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WARNING ("truncated handle\n"); \
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} \
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ASSERTGDI (gbCheckHandleLevel != 2, "truncated handle\n"); \
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} \
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}
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#else
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#define CHECK_HANDLE_WARNING(h,bZ)
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#endif
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#if HANDLE_FIXUP
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#define FIXUP_HANDLE(h) \
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{ \
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if (NEEDS_FIXING(h)) \
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{ \
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HANDLE_WARNING(); \
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h = GdiFixUpHandle(h); \
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} \
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}
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#else
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#define FIXUP_HANDLE(h) \
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{ \
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CHECK_HANDLE_WARNING(h,FALSE); \
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}
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#endif
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#if HANDLE_FIXUP
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#define FIXUP_HANDLEZ(h) \
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{ \
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if (h && NEEDS_FIXING(h)) \
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{ \
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HANDLE_WARNING(); \
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h = GdiFixUpHandle(h); \
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} \
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}
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#else
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#define FIXUP_HANDLEZ(h) \
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{ \
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CHECK_HANDLE_WARNING(h,TRUE); \
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}
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#endif
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#define FIXUP_HANDLE_NOW(h) \
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{ \
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if (NEEDS_FIXING(h)) \
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{ \
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HANDLE_WARNING(); \
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h = GdiFixUpHandle(h); \
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} \
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}
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