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[GDI32]

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Improve client object code

svn path=/trunk/; revision=65882
This commit is contained in:
Timo Kreuzer 2014-12-29 13:11:48 +00:00
parent 292ef5fd5c
commit a0624a040f
2 changed files with 79 additions and 23 deletions
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20
reactos/win32ss/gdi/gdi32/include/gdi32p.h
View file

@ -446,18 +446,32 @@ _lrintf(float f)
HGDIOBJ
WINAPI
GdiInsertClientObj(
GdiCreateClientObj(
_In_ PVOID pvObject,
_In_ GDILOOBJTYPE eObjType);
PVOID
WINAPI
GdiGetClientObject(
GdiDeleteClientObj(
_In_ HGDIOBJ hobj);
BOOL
WINAPI
GdiCreateClientObjLink(
_In_ HGDIOBJ hobj,
_In_ PVOID pvObject);
PVOID
WINAPI
GdiGetClientObjLink(
_In_ HGDIOBJ hobj);
PVOID
WINAPI
GdiRemoveClientObject(
GdiRemoveClientObjLink(
_In_ HGDIOBJ hobj);
extern ULONG gcClientObj;
/* EOF */

82
reactos/win32ss/gdi/gdi32/objects/clientobj.c
View file

@ -8,6 +8,7 @@
#include <precomp.h>
CRITICAL_SECTION gcsClientObjLinks;
ULONG gcClientObj;
typedef struct _CLIENTOBJLINK
{
@ -18,54 +19,46 @@ typedef struct _CLIENTOBJLINK
PCLIENTOBJLINK gapcolHashTable[127];
HGDIOBJ
BOOL
WINAPI
GdiInsertClientObj(
_In_ PVOID pvObject,
_In_ GDILOOBJTYPE eObjType)
GdiCreateClientObjLink(
_In_ HGDIOBJ hobj,
_In_ PVOID pvObject)
{
PCLIENTOBJLINK pcol;
ULONG iHashIndex;
HGDIOBJ hobj;
/* Call win32k to create a client object handle */
hobj = NtGdiCreateClientObj(eObjType);
if (hobj == NULL)
{
return NULL;
}
/* Calculate the hash index */
iHashIndex = (ULONG_PTR)hobj % _countof(gapcolHashTable);
/* Allocate a link structure */
pcol = HeapAlloc(GetProcessHeap(), 0, sizeof(*pcol));
if (pcol == NULL)
{
NtGdiDeleteClientObj(hobj);
return NULL;
return FALSE;
}
/* Setup the link structure */
pcol->hobj = hobj;
pcol->pvObj = pvObject;
/* Calculate the hash index */
iHashIndex = (ULONG_PTR)hobj % _countof(gapcolHashTable);
/* Enter the critical section */
EnterCriticalSection(&gcsClientObjLinks);
/* Insert the link structure */
pcol->pcolNext = gapcolHashTable[iHashIndex];
gapcolHashTable[iHashIndex] = pcol;
gcClientObj++;
/* Leave the critical section */
LeaveCriticalSection(&gcsClientObjLinks);
return hobj;
return TRUE;
}
PVOID
WINAPI
GdiGetClientObject(
GdiGetClientObjLink(
_In_ HGDIOBJ hobj)
{
ULONG iHashIndex;
@ -102,7 +95,7 @@ GdiGetClientObject(
PVOID
WINAPI
GdiRemoveClientObject(
GdiRemoveClientObjLink(
_In_ HGDIOBJ hobj)
{
PCLIENTOBJLINK pcol, *ppcol;
@ -127,6 +120,7 @@ GdiRemoveClientObject(
{
/* Update the link pointer, removing this link */
*ppcol = pcol->pcolNext;
gcClientObj--;
/* Get the object pointer */
pvObject = pcol->pvObj;
@ -148,3 +142,51 @@ GdiRemoveClientObject(
/* Return the object pointer, or NULL if we did not find it */
return pvObject;
}
HGDIOBJ
WINAPI
GdiCreateClientObj(
_In_ PVOID pvObject,
_In_ GDILOOBJTYPE eObjType)
{
HGDIOBJ hobj;
/* Call win32k to create a client object handle */
hobj = NtGdiCreateClientObj(eObjType);
if (hobj == NULL)
{
return NULL;
}
/* Create the client object link */
if (!GdiCreateClientObjLink(hobj, pvObject))
{
NtGdiDeleteClientObj(hobj);
return NULL;
}
return hobj;
}
PVOID
WINAPI
GdiDeleteClientObj(
_In_ HGDIOBJ hobj)
{
PVOID pvObject;
/* Remove the client object link */
pvObject = GdiRemoveClientObjLink(hobj);
if (pvObject == NULL)
{
return NULL;
}
/* Call win32k to delete the handle */
if (!NtGdiDeleteClientObj(hobj))
{
ASSERT(FALSE);
}
return pvObject;
}