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implemented reuse counters for gdi objects

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svn path=/trunk/; revision=13628
This commit is contained in:
Thomas Bluemel 2005-02-18 12:54:17 +00:00
parent 738f6ff916
commit d786cecb72
3 changed files with 79 additions and 156 deletions
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23
reactos/include/win32k/gdiobj.h
View file

@ -19,13 +19,16 @@
#define GDI_HANDLE_INDEX_MASK (GDI_HANDLE_COUNT - 1)
#define GDI_HANDLE_TYPE_MASK 0x007f0000
#define GDI_HANDLE_STOCK_MASK 0x00800000
#define GDI_HANDLE_REUSE_MASK 0xff000000
#define GDI_HANDLE_REUSECNT_SHIFT 24
#define GDI_HANDLE_CREATE(i, t) ((HANDLE)(((i) & GDI_HANDLE_INDEX_MASK) | ((t) & GDI_HANDLE_TYPE_MASK)))
#define GDI_HANDLE_GET_INDEX(h) (((DWORD)(h)) & GDI_HANDLE_INDEX_MASK)
#define GDI_HANDLE_GET_TYPE(h) (((DWORD)(h)) & GDI_HANDLE_TYPE_MASK)
#define GDI_HANDLE_IS_TYPE(h, t) ((t) == (((DWORD)(h)) & GDI_HANDLE_TYPE_MASK))
#define GDI_HANDLE_IS_STOCKOBJ(h) (0 != (((DWORD)(h)) & GDI_HANDLE_STOCK_MASK))
#define GDI_HANDLE_SET_STOCKOBJ(h) ((h) = (HANDLE)(((DWORD)(h)) | GDI_HANDLE_STOCK_MASK))
#define GDI_HANDLE_GET_INDEX(h) (((ULONG_PTR)(h)) & GDI_HANDLE_INDEX_MASK)
#define GDI_HANDLE_GET_TYPE(h) (((ULONG_PTR)(h)) & GDI_HANDLE_TYPE_MASK)
#define GDI_HANDLE_IS_TYPE(h, t) ((t) == (((ULONG_PTR)(h)) & GDI_HANDLE_TYPE_MASK))
#define GDI_HANDLE_IS_STOCKOBJ(h) (0 != (((ULONG_PTR)(h)) & GDI_HANDLE_STOCK_MASK))
#define GDI_HANDLE_SET_STOCKOBJ(h) ((h) = (HANDLE)(((ULONG_PTR)(h)) | GDI_HANDLE_STOCK_MASK))
/*! \defgroup GDI object types
@ -74,20 +77,10 @@ typedef struct _GDIOBJHDR
#endif
} GDIOBJHDR, *PGDIOBJHDR;
typedef struct _GDIMULTILOCK
{
HGDIOBJ hObj;
PGDIOBJ pObj;
DWORD ObjectType;
} GDIMULTILOCK, *PGDIMULTILOCK;
BOOL INTERNAL_CALL GDIOBJ_LockMultipleObj(PGDIMULTILOCK pList, INT nObj);
BOOL INTERNAL_CALL GDIOBJ_UnlockMultipleObj(PGDIMULTILOCK pList, INT nObj);
BOOL INTERNAL_CALL GDIOBJ_OwnedByCurrentProcess(HGDIOBJ ObjectHandle);
void INTERNAL_CALL GDIOBJ_SetOwnership(HGDIOBJ ObjectHandle, PEPROCESS Owner);
void INTERNAL_CALL GDIOBJ_CopyOwnership(HGDIOBJ CopyFrom, HGDIOBJ CopyTo);
BOOL INTERNAL_CALL GDIOBJ_ConvertToStockObj(HGDIOBJ *hObj);
BOOL INTERNAL_CALL GDIOBJ_LockMultipleObj(PGDIMULTILOCK pList, INT nObj);
#define GDIOBJ_GetObjectType(Handle) \
GDI_HANDLE_GET_TYPE(Handle)

127
reactos/subsys/win32k/objects/gdiobj.c
View file

@ -377,28 +377,31 @@ GDIOBJ_AllocObj(ULONG ObjectType)
RtlZeroMemory(ObjectBody, GetObjectSize(ObjectType));
TypeInfo = (ObjectType & 0xFFFF0000) | (ObjectType >> 16);
TypeInfo = (ObjectType & GDI_HANDLE_TYPE_MASK) | (ObjectType >> 16);
FreeEntry = InterlockedPopEntrySList(&HandleTable->FreeEntriesHead);
if(FreeEntry != NULL)
{
HANDLE PrevProcId;
UINT Index;
HGDIOBJ Handle;
/* calculate the entry from the address of the entry in the free slot array */
Index = ((ULONG_PTR)FreeEntry - (ULONG_PTR)&HandleTable->FreeEntries[0]) /
sizeof(HandleTable->FreeEntries[0]);
Entry = &HandleTable->Entries[Index];
Handle = (HGDIOBJ)((Index & 0xFFFF) | (ObjectType & 0xFFFF0000));
LockHandle:
PrevProcId = InterlockedCompareExchangePointer(&Entry->ProcessId, LockedProcessId, 0);
if(PrevProcId == NULL)
{
HGDIOBJ Handle;
ASSERT(Entry->KernelData == NULL);
Entry->KernelData = ObjectBody;
/* copy the reuse-counter */
TypeInfo |= Entry->Type & GDI_HANDLE_REUSE_MASK;
/* we found a free entry, no need to exchange this field atomically
since we're holding the lock */
@ -416,6 +419,7 @@ LockHandle:
{
InterlockedIncrement(&W32Process->GDIObjects);
}
Handle = (HGDIOBJ)((Index & 0xFFFF) | (TypeInfo & (GDI_HANDLE_TYPE_MASK | GDI_HANDLE_REUSE_MASK)));
DPRINT("GDIOBJ_AllocObj: 0x%x ob: 0x%x\n", Handle, ObjectBody);
return Handle;
@ -425,7 +429,7 @@ LockHandle:
#ifdef GDI_DEBUG
if(++Attempts > 20)
{
DPRINT1("[%d]Waiting on 0x%x\n", Attempts, Handle);
DPRINT1("[%d]Waiting on handle in index 0x%x\n", Attempts, Index);
}
#endif
/* damn, someone is trying to lock the object even though it doesn't
@ -508,7 +512,8 @@ LockHandle:
PrevProcId = InterlockedCompareExchangePointer(&Entry->ProcessId, LockedProcessId, ProcessId);
if(PrevProcId == ProcessId)
{
if(Entry->Type != 0 && Entry->KernelData != NULL && (ExpectedType == 0 || ((Entry->Type << 16) == ExpectedType)))
if(Entry->Type != 0 && Entry->KernelData != NULL &&
(ExpectedType == 0 || ((Entry->Type << 16) == ExpectedType)))
{
PGDIOBJHDR GdiHdr;
@ -520,8 +525,8 @@ LockHandle:
PW32PROCESS W32Process = PsGetWin32Process();
ULONG Type = Entry->Type << 16;
/* Clear the type field so when unlocking the handle it gets finally deleted */
Entry->Type = 0;
/* Clear the type field so when unlocking the handle it gets finally deleted and increment reuse counter */
Entry->Type = ((Entry->Type >> GDI_HANDLE_REUSECNT_SHIFT) + 1) << GDI_HANDLE_REUSECNT_SHIFT;
Entry->KernelData = NULL;
/* unlock the handle slot */
@ -551,8 +556,9 @@ LockHandle:
else
{
/* the object is currently locked. just clear the type field so when the
object gets unlocked it will be finally deleted from the table. */
Entry->Type = 0;
object gets unlocked it will be finally deleted from the table. Also
incrment the reuse counter! */
Entry->Type = ((Entry->Type >> GDI_HANDLE_REUSECNT_SHIFT) + 1) << GDI_HANDLE_REUSECNT_SHIFT;
/* unlock the handle slot */
InterlockedExchangePointer(&Entry->ProcessId, NULL);
@ -563,7 +569,7 @@ LockHandle:
}
else
{
if(Entry->Type != 0)
if((Entry->Type & ~GDI_HANDLE_REUSE_MASK) != 0)
{
DPRINT1("Attempted to delete object 0x%x, type mismatch (0x%x : 0x%x)\n", hObj, ObjectType, ExpectedType);
}
@ -609,85 +615,6 @@ LockHandle:
return FALSE;
}
/*!
* Lock multiple objects. Use this function when you need to lock multiple objects and some of them may be
* duplicates. You should use this function to avoid trying to lock the same object twice!
*
* \param pList pointer to the list that contains handles to the objects. You should set hObj and ObjectType fields.
* \param nObj number of objects to lock
* \return for each entry in pList this function sets pObj field to point to the object.
*
* \note this function uses an O(n^2) algoritm because we shouldn't need to call it with more than 3 or 4 objects.
*/
BOOL INTERNAL_CALL
GDIOBJ_LockMultipleObj(PGDIMULTILOCK pList, INT nObj)
{
INT i, j;
ASSERT( pList );
/* FIXME - check for "invalid" handles */
/* go through the list checking for duplicate objects */
for (i = 0; i < nObj; i++)
{
pList[i].pObj = NULL;
for (j = 0; j < i; j++)
{
if (pList[i].hObj == pList[j].hObj)
{
/* already locked, so just copy the pointer to the object */
pList[i].pObj = pList[j].pObj;
break;
}
}
if (NULL == pList[i].pObj)
{
/* object hasn't been locked, so lock it. */
if (NULL != pList[i].hObj)
{
pList[i].pObj = GDIOBJ_LockObj(pList[i].hObj, pList[i].ObjectType);
}
}
}
return TRUE;
}
/*!
* Unlock multiple objects. Use this function when you need to unlock multiple objects and some of them may be
* duplicates.
*
* \param pList pointer to the list that contains handles to the objects. You should set hObj and ObjectType fields.
* \param nObj number of objects to lock
*
* \note this function uses O(n^2) algoritm because we shouldn't need to call it with more than 3 or 4 objects.
*/
BOOL INTERNAL_CALL
GDIOBJ_UnlockMultipleObj(PGDIMULTILOCK pList, INT nObj)
{
INT i, j;
ASSERT(pList);
/* go through the list checking for duplicate objects */
for (i = 0; i < nObj; i++)
{
if (NULL != pList[i].pObj)
{
for (j = i + 1; j < nObj; j++)
{
if ((pList[i].pObj == pList[j].pObj))
{
/* set the pointer to zero for all duplicates */
pList[j].pObj = NULL;
}
}
GDIOBJ_UnlockObj(pList[i].hObj);
pList[i].pObj = NULL;
}
}
return TRUE;
}
/*!
* Initialization of the GDI object engine.
*/
@ -744,11 +671,11 @@ GDI_CleanupForProcess (struct _EPROCESS *Process)
End = &HandleTable->Entries[GDI_HANDLE_COUNT];
for(Entry = &HandleTable->Entries[RESERVE_ENTRIES_COUNT];
Entry < End;
Entry != End;
Entry++, Index++)
{
/* ignore the lock bit */
if((HANDLE)((ULONG_PTR)Entry->ProcessId & ~0x1) == ProcId && Entry->Type != 0)
if((HANDLE)((ULONG_PTR)Entry->ProcessId & ~0x1) == ProcId && (Entry->Type & ~GDI_HANDLE_REUSE_MASK) != 0)
{
HGDIOBJ ObjectHandle;
@ -824,7 +751,8 @@ LockHandle:
/* we're locking an object that belongs to our process or it's a global
object if ProcessId == 0 here. ProcessId can only be 0 here if it previously
failed to lock the object and it turned out to be a global object. */
if(EntryType != 0 && Entry->KernelData != NULL && (ExpectedType == 0 || (EntryType == ExpectedType)))
if(EntryType != 0 && Entry->KernelData != NULL &&
(ExpectedType == 0 || (EntryType == ExpectedType)))
{
PETHREAD PrevThread;
PGDIOBJHDR GdiHdr;
@ -870,14 +798,15 @@ LockHandle:
{
InterlockedExchangePointer(&Entry->ProcessId, PrevProcId);
if(EntryType == 0)
if((EntryType & ~GDI_HANDLE_REUSE_MASK) == 0)
{
DPRINT1("Attempted to lock object 0x%x that is deleted!\n", hObj);
KeRosDumpStackFrames ( NULL, 20 );
}
else
{
DPRINT1("Attempted to lock object 0x%x, type mismatch (0x%x : 0x%x)\n", hObj, EntryType, ExpectedType);
DPRINT1("Attempted to lock object 0x%x, type mismatch (0x%x : 0x%x)\n",
hObj, EntryType & ~GDI_HANDLE_REUSE_MASK, ExpectedType & ~GDI_HANDLE_REUSE_MASK);
KeRosDumpStackFrames ( NULL, 20 );
}
#ifdef GDI_DEBUG
@ -981,7 +910,7 @@ LockHandle:
#endif
}
if(Entry->Type == 0 && GdiHdr->Locks == 0)
if((Entry->Type & ~GDI_HANDLE_REUSE_MASK) == 0 && GdiHdr->Locks == 0)
{
PPAGED_LOOKASIDE_LIST LookasideList;
PW32PROCESS W32Process = PsGetWin32Process();
@ -1095,7 +1024,7 @@ GDIOBJ_OwnedByCurrentProcess(HGDIOBJ ObjectHandle)
Entry = GDI_HANDLE_GET_ENTRY(HandleTable, ObjectHandle);
Ret = Entry->KernelData != NULL &&
Entry->Type != 0 &&
(Entry->Type & ~GDI_HANDLE_REUSE_MASK) != 0 &&
(HANDLE)((ULONG_PTR)Entry->ProcessId & ~0x1) == ProcessId;
return Ret;
@ -1143,6 +1072,8 @@ LockHandle:
exchange it.*/
NewType = GDI_HANDLE_GET_TYPE(*hObj);
NewType |= NewType >> 16;
NewType |= (ULONG_PTR)(*hObj) & GDI_HANDLE_REUSE_MASK;
/* This is the type that the object should have right now, save it */
OldType = NewType;
/* As the object should be a stock object, set it's flag, but only in the upper 16 bits */
@ -1268,7 +1199,7 @@ LockHandle:
{
PETHREAD PrevThread;
if(Entry->Type != 0 && Entry->KernelData != NULL)
if((Entry->Type & ~GDI_HANDLE_REUSE_MASK) != 0 && Entry->KernelData != NULL)
{
PGDIOBJHDR GdiHdr = GDIBdyToHdr(Entry->KernelData);
@ -1401,7 +1332,7 @@ LockHandleFrom:
PETHREAD PrevThread;
PGDIOBJHDR GdiHdr;
if(FromEntry->Type != 0 && FromEntry->KernelData != NULL)
if((FromEntry->Type & ~GDI_HANDLE_REUSE_MASK) != 0 && FromEntry->KernelData != NULL)
{
GdiHdr = GDIBdyToHdr(FromEntry->KernelData);

85
reactos/subsys/win32k/objects/region.c
View file

@ -707,45 +707,43 @@ empty:
HRGN FASTCALL REGION_CropRgn(HRGN hDst, HRGN hSrc, const PRECT lpRect, PPOINT lpPt)
{
PROSRGNDATA objSrc, rgnDst;
HRGN hNewDst, hRet = NULL;
GDIMULTILOCK Lock[2] = {{hDst, 0, GDI_OBJECT_TYPE_REGION}, {hSrc, 0, GDI_OBJECT_TYPE_REGION}};
HRGN hRet = NULL;
POINT pt = { 0, 0 };
if( !hDst )
{
if( !( hNewDst = RGNDATA_AllocRgn(1) ) )
if( !( hDst = RGNDATA_AllocRgn(1) ) )
{
return 0;
}
Lock[0].hObj = hNewDst;
}
if ( !GDIOBJ_LockMultipleObj(Lock, sizeof(Lock)/sizeof(Lock[0])) )
{
DPRINT1("GDIOBJ_LockMultipleObj() failed\n" );
return 0;
}
rgnDst = Lock[0].pObj;
objSrc = Lock[1].pObj;
if( objSrc && rgnDst )
rgnDst = RGNDATA_LockRgn(hDst);
if(rgnDst == NULL)
{
if(rgnDst)
{
POINT pt = { 0, 0 };
if(!lpPt)
lpPt = &pt;
if(REGION_CropAndOffsetRegion(lpPt, lpRect, objSrc, rgnDst) == FALSE)
{ // ve failed cleanup and return
hRet = NULL;
}
else{ // ve are fine. unlock the correct pointer and return correct handle
hRet = Lock[0].hObj;
}
}
return NULL;
}
GDIOBJ_UnlockMultipleObj(Lock, sizeof(Lock)/sizeof(Lock[0]));
objSrc = RGNDATA_LockRgn(hSrc);
if(objSrc == NULL)
{
RGNDATA_UnlockRgn(hDst);
return NULL;
}
if(!lpPt)
lpPt = &pt;
if(REGION_CropAndOffsetRegion(lpPt, lpRect, objSrc, rgnDst) == FALSE)
{ // ve failed cleanup and return
hRet = NULL;
}
else{ // ve are fine. unlock the correct pointer and return correct handle
hRet = hDst;
}
RGNDATA_UnlockRgn(hSrc);
RGNDATA_UnlockRgn(hDst);
return hRet;
}
@ -1957,21 +1955,12 @@ NtGdiCombineRgn(HRGN hDest,
INT CombineMode)
{
INT result = ERROR;
GDIMULTILOCK Lock[3] = {{hDest, 0, GDI_OBJECT_TYPE_REGION}, {hSrc1, 0, GDI_OBJECT_TYPE_REGION}, {hSrc2, 0, GDI_OBJECT_TYPE_REGION}};
PROSRGNDATA destRgn, src1Rgn, src2Rgn;
if ( !GDIOBJ_LockMultipleObj(Lock, sizeof(Lock)/sizeof(Lock[0])) )
{
DPRINT1("GDIOBJ_LockMultipleObj() failed\n" );
return ERROR;
}
destRgn = (PROSRGNDATA) Lock[0].pObj;
src1Rgn = (PROSRGNDATA) Lock[1].pObj;
src2Rgn = (PROSRGNDATA) Lock[2].pObj;
destRgn = RGNDATA_LockRgn(hDest);
if( destRgn )
{
src1Rgn = RGNDATA_LockRgn(hSrc1);
if( src1Rgn )
{
if (CombineMode == RGN_COPY)
@ -1982,7 +1971,8 @@ NtGdiCombineRgn(HRGN hDest,
}
else
{
if( src2Rgn )
src2Rgn = RGNDATA_LockRgn(hSrc2);
if( src2Rgn )
{
switch (CombineMode)
{
@ -1999,17 +1989,26 @@ NtGdiCombineRgn(HRGN hDest,
REGION_SubtractRegion(destRgn, src1Rgn, src2Rgn);
break;
}
RGNDATA_UnlockRgn(hSrc2);
result = destRgn->rdh.iType;
}
else
{
DPRINT1("NtGdiCombineRgn requires hSrc2 != NULL for combine mode %d!\n", CombineMode);
}
}
RGNDATA_UnlockRgn(hSrc1);
}
RGNDATA_UnlockRgn(hDest);
}
else
{
DPRINT("NtGdiCombineRgn: hDest unavailable\n");
result = ERROR;
}
GDIOBJ_UnlockMultipleObj(Lock, sizeof(Lock)/sizeof(Lock[0]));
return result;
}