e0234a187e5779a51e544f433de0d8e83a330103
[reactos.git] / reactos / win32ss / gdi / ntgdi / gdiobj.c
1 /*
2 * PROJECT: ReactOS win32 kernel mode subsystem
3 * LICENSE: GPL - See COPYING in the top level directory
4 * FILE: subsystems/win32/win32k/objects/gdiobj.c
5 * PURPOSE: General GDI object manipulation routines
6 * PROGRAMMERS: Timo Kreuzer
7 */
8
9 /*
10 * If you want to understand this code, you need to start thinking in portals.
11 * - gpaulRefCount is a global pointer to an allocated array of ULONG values,
12 * one for each handle. Bits 0 - 22 contain a reference count for the handle.
13 * It gets increased for each handle lock / reference. Bit 23 contains a valid
14 * bit. If this bit is 0, the handle got deleted and will be pushed to the free
15 * list, once all references are gone. Bits 24 - 31 contain the reuse value of
16 * the handle, which allows to check if the entry was changed before atomically
17 * exchanging the reference count.
18 * - Objects can exist with or without a handle
19 * - Objects with a handle can be locked either exclusively or shared.
20 * Both locks increase the handle reference count in gpaulRefCount.
21 * Exclusive locks also increase the BASEOBJECT's cExclusiveLock field
22 * and the first lock (can be acquired recursively) acquires a pushlock
23 * that is also stored in the BASEOBJECT.
24 * - Objects without a handle cannot have exclusive locks. Their reference
25 * count is tracked in the BASEOBJECT's ulShareCount field.
26 * - An object that is inserted in the handle table automatically has an
27 * exclusive lock. For objects that are "shared objects" (BRUSH, PALETTE, ...)
28 * this is the only way it can ever be exclusively locked. It prevents the
29 * object from being locked by another thread. A shared lock will simply fail,
30 * while an exclusive lock will succeed after the object was unlocked.
31 *
32 */
33
34 /* INCLUDES ******************************************************************/
35
36 #include <win32k.h>
37 #define NDEBUG
38 #include <debug.h>
39
40 // Move to gdidbg.h
41 #if DBG
42 #define DBG_INCREASE_LOCK_COUNT(pti, hobj) \
43 if (pti) ((PTHREADINFO)pti)->acExclusiveLockCount[((ULONG_PTR)hobj >> 16) & 0x1f]++;
44 #define DBG_DECREASE_LOCK_COUNT(pti, hobj) \
45 if (pti) ((PTHREADINFO)pti)->acExclusiveLockCount[((ULONG_PTR)hobj >> 16) & 0x1f]--;
46 #define ASSERT_SHARED_OBJECT_TYPE(objt) \
47 ASSERT((objt) == GDIObjType_SURF_TYPE || \
48 (objt) == GDIObjType_PAL_TYPE || \
49 (objt) == GDIObjType_LFONT_TYPE || \
50 (objt) == GDIObjType_PATH_TYPE || \
51 (objt) == GDIObjType_BRUSH_TYPE)
52 #define ASSERT_EXCLUSIVE_OBJECT_TYPE(objt) \
53 ASSERT((objt) == GDIObjType_DC_TYPE || \
54 (objt) == GDIObjType_RGN_TYPE || \
55 (objt) == GDIObjType_LFONT_TYPE)
56 #else
57 #define DBG_INCREASE_LOCK_COUNT(ppi, hobj)
58 #define DBG_DECREASE_LOCK_COUNT(x, y)
59 #define ASSERT_SHARED_OBJECT_TYPE(objt)
60 #define ASSERT_EXCLUSIVE_OBJECT_TYPE(objt)
61 #endif
62
63 #define MmMapViewInSessionSpace MmMapViewInSystemSpace
64
65 #if defined(_M_IX86) || defined(_M_AMD64)
66 #define InterlockedOr16 _InterlockedOr16
67 #endif
68
69 #define GDIOBJ_POOL_TAG(type) ('00hG' + ((objt & 0x1f) << 24))
70
71 enum
72 {
73 REF_MASK_REUSE = 0xff000000,
74 REF_INC_REUSE = 0x01000000,
75 REF_MASK_VALID = 0x00800000,
76 REF_MASK_COUNT = 0x007fffff,
77 REF_MASK_INUSE = 0x00ffffff,
78 };
79
80 /* GLOBALS *******************************************************************/
81
82 /* Per session handle table globals */
83 static PVOID gpvGdiHdlTblSection = NULL;
84 static PENTRY gpentHmgr;
85 static PULONG gpaulRefCount;
86 ULONG gulFirstFree;
87 ULONG gulFirstUnused;
88 static PPAGED_LOOKASIDE_LIST gpaLookasideList;
89
90 static BOOL NTAPI GDIOBJ_Cleanup(PVOID ObjectBody);
91
92 static const
93 GDICLEANUPPROC
94 apfnCleanup[] =
95 {
96 NULL, /* 00 GDIObjType_DEF_TYPE */
97 DC_Cleanup, /* 01 GDIObjType_DC_TYPE */
98 NULL, /* 02 GDIObjType_UNUSED1_TYPE */
99 NULL, /* 03 GDIObjType_UNUSED2_TYPE */
100 REGION_Cleanup, /* 04 GDIObjType_RGN_TYPE */
101 SURFACE_Cleanup, /* 05 GDIObjType_SURF_TYPE */
102 GDIOBJ_Cleanup, /* 06 GDIObjType_CLIENTOBJ_TYPE */
103 GDIOBJ_Cleanup, /* 07 GDIObjType_PATH_TYPE */
104 PALETTE_Cleanup, /* 08 GDIObjType_PAL_TYPE */
105 GDIOBJ_Cleanup, /* 09 GDIObjType_ICMLCS_TYPE */
106 GDIOBJ_Cleanup, /* 0a GDIObjType_LFONT_TYPE */
107 NULL, /* 0b GDIObjType_RFONT_TYPE, unused */
108 NULL, /* 0c GDIObjType_PFE_TYPE, unused */
109 NULL, /* 0d GDIObjType_PFT_TYPE, unused */
110 GDIOBJ_Cleanup, /* 0e GDIObjType_ICMCXF_TYPE */
111 NULL, /* 0f GDIObjType_SPRITE_TYPE, unused */
112 BRUSH_Cleanup, /* 10 GDIObjType_BRUSH_TYPE, BRUSH, PEN, EXTPEN */
113 NULL, /* 11 GDIObjType_UMPD_TYPE, unused */
114 NULL, /* 12 GDIObjType_UNUSED4_TYPE */
115 NULL, /* 13 GDIObjType_SPACE_TYPE, unused */
116 NULL, /* 14 GDIObjType_UNUSED5_TYPE */
117 NULL, /* 15 GDIObjType_META_TYPE, unused */
118 NULL, /* 16 GDIObjType_EFSTATE_TYPE, unused */
119 NULL, /* 17 GDIObjType_BMFD_TYPE, unused */
120 NULL, /* 18 GDIObjType_VTFD_TYPE, unused */
121 NULL, /* 19 GDIObjType_TTFD_TYPE, unused */
122 NULL, /* 1a GDIObjType_RC_TYPE, unused */
123 NULL, /* 1b GDIObjType_TEMP_TYPE, unused */
124 DRIVEROBJ_Cleanup,/* 1c GDIObjType_DRVOBJ_TYPE */
125 NULL, /* 1d GDIObjType_DCIOBJ_TYPE, unused */
126 NULL, /* 1e GDIObjType_SPOOL_TYPE, unused */
127 NULL, /* 1f reserved entry */
128 };
129
130 /* INTERNAL FUNCTIONS ********************************************************/
131
132 static
133 BOOL NTAPI
134 GDIOBJ_Cleanup(PVOID ObjectBody)
135 {
136 return TRUE;
137 }
138
139 static
140 VOID
141 InitLookasideList(UCHAR objt, ULONG cjSize)
142 {
143 ExInitializePagedLookasideList(&gpaLookasideList[objt],
144 NULL,
145 NULL,
146 0,
147 cjSize,
148 GDITAG_HMGR_LOOKASIDE_START + (objt << 24),
149 0);
150 }
151
152 INIT_FUNCTION
153 NTSTATUS
154 NTAPI
155 InitGdiHandleTable(void)
156 {
157 NTSTATUS status;
158 LARGE_INTEGER liSize;
159 PVOID pvSection;
160 SIZE_T cjViewSize = 0;
161
162 /* Create a section for the shared handle table */
163 liSize.QuadPart = sizeof(GDI_HANDLE_TABLE); // GDI_HANDLE_COUNT * sizeof(ENTRY);
164 status = MmCreateSection(&gpvGdiHdlTblSection,
165 SECTION_ALL_ACCESS,
166 NULL,
167 &liSize,
168 PAGE_READWRITE,
169 SEC_COMMIT,
170 NULL,
171 NULL);
172 if (!NT_SUCCESS(status))
173 {
174 DPRINT1("INITGDI: Could not allocate a GDI handle table.\n");
175 return status;
176 }
177
178 /* Map the section in session space */
179 status = MmMapViewInSessionSpace(gpvGdiHdlTblSection,
180 (PVOID*)&gpentHmgr,
181 &cjViewSize);
182 if (!NT_SUCCESS(status))
183 {
184 DPRINT1("INITGDI: Failed to map handle table section\n");
185 ObDereferenceObject(gpvGdiHdlTblSection);
186 return status;
187 }
188
189 /* Allocate memory for the reference counter table */
190 gpaulRefCount = EngAllocSectionMem(&pvSection,
191 FL_ZERO_MEMORY,
192 GDI_HANDLE_COUNT * sizeof(ULONG),
193 'frHG');
194 if (!gpaulRefCount)
195 {
196 DPRINT1("INITGDI: Failed to allocate reference table.\n");
197 ObDereferenceObject(gpvGdiHdlTblSection);
198 return STATUS_INSUFFICIENT_RESOURCES;
199 }
200
201 gulFirstFree = 0;
202 gulFirstUnused = RESERVE_ENTRIES_COUNT;
203
204 GdiHandleTable = (PVOID)gpentHmgr;
205
206 /* Initialize the lookaside lists */
207 gpaLookasideList = ExAllocatePoolWithTag(NonPagedPool,
208 GDIObjTypeTotal * sizeof(PAGED_LOOKASIDE_LIST),
209 TAG_GDIHNDTBLE);
210 if(!gpaLookasideList)
211 return STATUS_NO_MEMORY;
212
213 InitLookasideList(GDIObjType_DC_TYPE, sizeof(DC));
214 InitLookasideList(GDIObjType_RGN_TYPE, sizeof(REGION));
215 InitLookasideList(GDIObjType_SURF_TYPE, sizeof(SURFACE));
216 InitLookasideList(GDIObjType_CLIENTOBJ_TYPE, sizeof(CLIENTOBJ));
217 InitLookasideList(GDIObjType_PATH_TYPE, sizeof(PATH));
218 InitLookasideList(GDIObjType_PAL_TYPE, sizeof(PALETTE));
219 InitLookasideList(GDIObjType_ICMLCS_TYPE, sizeof(COLORSPACE));
220 InitLookasideList(GDIObjType_LFONT_TYPE, sizeof(TEXTOBJ));
221 InitLookasideList(GDIObjType_BRUSH_TYPE, sizeof(BRUSH));
222
223 return STATUS_SUCCESS;
224 }
225
226 FORCEINLINE
227 VOID
228 IncrementGdiHandleCount(void)
229 {
230 PPROCESSINFO ppi = PsGetCurrentProcessWin32Process();
231 if (ppi) InterlockedIncrement((LONG*)&ppi->GDIHandleCount);
232 }
233
234 FORCEINLINE
235 VOID
236 DecrementGdiHandleCount(void)
237 {
238 PPROCESSINFO ppi = PsGetCurrentProcessWin32Process();
239 if (ppi) InterlockedDecrement((LONG*)&ppi->GDIHandleCount);
240 }
241
242 static
243 PENTRY
244 ENTRY_pentPopFreeEntry(VOID)
245 {
246 ULONG iFirst, iNext, iPrev;
247 PENTRY pentFree;
248
249 DPRINT("Enter InterLockedPopFreeEntry\n");
250
251 do
252 {
253 /* Get the index and sequence number of the first free entry */
254 iFirst = gulFirstFree;
255
256 /* Check if we have a free entry */
257 if (!(iFirst & GDI_HANDLE_INDEX_MASK))
258 {
259 /* Increment FirstUnused and get the new index */
260 iFirst = InterlockedIncrement((LONG*)&gulFirstUnused) - 1;
261
262 /* Check if we have unused entries left */
263 if (iFirst >= GDI_HANDLE_COUNT)
264 {
265 DPRINT1("No more GDI handles left!\n");
266 return 0;
267 }
268
269 /* Return the old entry */
270 return &gpentHmgr[iFirst];
271 }
272
273 /* Get a pointer to the first free entry */
274 pentFree = &gpentHmgr[iFirst & GDI_HANDLE_INDEX_MASK];
275
276 /* Create a new value with an increased sequence number */
277 iNext = (USHORT)(ULONG_PTR)pentFree->einfo.pobj;
278 iNext |= (iFirst & ~GDI_HANDLE_INDEX_MASK) + 0x10000;
279
280 /* Try to exchange the FirstFree value */
281 iPrev = InterlockedCompareExchange((LONG*)&gulFirstFree,
282 iNext,
283 iFirst);
284 }
285 while (iPrev != iFirst);
286
287 /* Sanity check: is entry really free? */
288 ASSERT(((ULONG_PTR)pentFree->einfo.pobj & ~GDI_HANDLE_INDEX_MASK) == 0);
289
290 return pentFree;
291 }
292
293 /* Pushes an entry of the handle table to the free list,
294 The entry must not have any references left */
295 static
296 VOID
297 ENTRY_vPushFreeEntry(PENTRY pentFree)
298 {
299 ULONG iToFree, iFirst, iPrev, idxToFree;
300
301 DPRINT("Enter ENTRY_vPushFreeEntry\n");
302
303 idxToFree = pentFree - gpentHmgr;
304 ASSERT((gpaulRefCount[idxToFree] & REF_MASK_INUSE) == 0);
305
306 /* Initialize entry */
307 pentFree->Objt = GDIObjType_DEF_TYPE;
308 pentFree->ObjectOwner.ulObj = 0;
309 pentFree->pUser = NULL;
310
311 /* Increase reuse counter in entry and reference counter */
312 InterlockedExchangeAdd((LONG*)&gpaulRefCount[idxToFree], REF_INC_REUSE);
313 pentFree->FullUnique += 0x0100;
314
315 do
316 {
317 /* Get the current first free index and sequence number */
318 iFirst = gulFirstFree;
319
320 /* Set the einfo.pobj member to the index of the first free entry */
321 pentFree->einfo.pobj = UlongToPtr(iFirst & GDI_HANDLE_INDEX_MASK);
322
323 /* Combine new index and increased sequence number in iToFree */
324 iToFree = idxToFree | ((iFirst & ~GDI_HANDLE_INDEX_MASK) + 0x10000);
325
326 /* Try to atomically update the first free entry */
327 iPrev = InterlockedCompareExchange((LONG*)&gulFirstFree,
328 iToFree,
329 iFirst);
330 }
331 while (iPrev != iFirst);
332 }
333
334 static
335 PENTRY
336 ENTRY_ReferenceEntryByHandle(HGDIOBJ hobj, FLONG fl)
337 {
338 ULONG ulIndex, cNewRefs, cOldRefs;
339 PENTRY pentry;
340
341 /* Get the handle index and check if its too big */
342 ulIndex = GDI_HANDLE_GET_INDEX(hobj);
343 if (ulIndex >= GDI_HANDLE_COUNT) return NULL;
344
345 /* Get pointer to the entry */
346 pentry = &gpentHmgr[ulIndex];
347
348 /* Get the current reference count */
349 cOldRefs = gpaulRefCount[ulIndex];
350
351 do
352 {
353 /* Check if the slot is deleted */
354 if ((cOldRefs & REF_MASK_VALID) == 0)
355 {
356 DPRINT("GDIOBJ: Slot is not valid: 0x%lx, hobh=%p\n", cOldRefs, hobj);
357 return NULL;
358 }
359
360 /* Check if the unique value matches */
361 if (pentry->FullUnique != (USHORT)((ULONG_PTR)hobj >> 16))
362 {
363 DPRINT("GDIOBJ: Wrong unique value. Handle: 0x%4x, entry: 0x%4x\n",
364 (USHORT)((ULONG_PTR)hobj >> 16, pentry->FullUnique));
365 return NULL;
366 }
367
368 /* Check if the object owner is this process or public */
369 if (!(fl & GDIOBJFLAG_IGNOREPID) &&
370 pentry->ObjectOwner.ulObj != GDI_OBJ_HMGR_PUBLIC &&
371 pentry->ObjectOwner.ulObj != PtrToUlong(PsGetCurrentProcessId()))
372 {
373 DPRINT("GDIOBJ: Cannot reference foreign handle %p, pentry=%p:%lx.\n",
374 hobj, pentry, pentry->ObjectOwner.ulObj);
375 return NULL;
376 }
377
378 /* Try to atomically increment the reference count */
379 cNewRefs = cOldRefs + 1;
380 cOldRefs = InterlockedCompareExchange((PLONG)&gpaulRefCount[ulIndex],
381 cNewRefs,
382 cOldRefs);
383 }
384 while (cNewRefs != cOldRefs + 1);
385
386 /* Integrity checks */
387 ASSERT((pentry->FullUnique & 0x1f) == pentry->Objt);
388 ASSERT(pentry->einfo.pobj && pentry->einfo.pobj->hHmgr == hobj);
389
390 return pentry;
391 }
392
393 static
394 HGDIOBJ
395 ENTRY_hInsertObject(PENTRY pentry, POBJ pobj, UCHAR objt, ULONG ulOwner)
396 {
397 ULONG ulIndex;
398
399 /* Calculate the handle index */
400 ulIndex = pentry - gpentHmgr;
401
402 /* Update the fields in the ENTRY */
403 pentry->einfo.pobj = pobj;
404 pentry->Objt = objt & 0x1f;
405 pentry->FullUnique = (pentry->FullUnique & 0xff00) | objt;
406 pentry->ObjectOwner.ulObj = ulOwner;
407
408 /* Make the handle valid with 1 reference */
409 ASSERT((gpaulRefCount[ulIndex] & REF_MASK_INUSE) == 0);
410 InterlockedOr((LONG*)&gpaulRefCount[ulIndex], REF_MASK_VALID | 1);
411
412 /* Return the handle */
413 return (HGDIOBJ)(((ULONG_PTR)pentry->FullUnique << 16) | ulIndex);
414 }
415
416 POBJ
417 NTAPI
418 GDIOBJ_AllocateObject(UCHAR objt, ULONG cjSize, FLONG fl)
419 {
420 POBJ pobj;
421
422 if (fl & BASEFLAG_LOOKASIDE)
423 {
424 /* Allocate the object from a lookaside list */
425 pobj = ExAllocateFromPagedLookasideList(&gpaLookasideList[objt & 0x1f]);
426 }
427 else
428 {
429 /* Allocate the object from paged pool */
430 pobj = ExAllocatePoolWithTag(PagedPool, cjSize, GDIOBJ_POOL_TAG(objt));
431 }
432
433 if (!pobj) return NULL;
434
435 /* Initialize the object */
436 RtlZeroMemory(pobj, cjSize);
437 pobj->hHmgr = (HGDIOBJ)((ULONG_PTR)objt << 16);
438 pobj->cExclusiveLock = 0;
439 pobj->ulShareCount = 1;
440 pobj->BaseFlags = fl & 0xffff;
441 DBG_INITLOG(&pobj->slhLog);
442 DBG_LOGEVENT(&pobj->slhLog, EVENT_ALLOCATE, 0);
443
444 return pobj;
445 }
446
447 VOID
448 NTAPI
449 GDIOBJ_vFreeObject(POBJ pobj)
450 {
451 UCHAR objt;
452
453 DBG_CLEANUP_EVENT_LIST(&pobj->slhLog);
454
455 /* Get the object type */
456 objt = ((ULONG_PTR)pobj->hHmgr >> 16) & 0x1f;
457
458 /* Call the cleanup procedure */
459 ASSERT(apfnCleanup[objt]);
460 apfnCleanup[objt](pobj);
461
462 /* Check if the object is allocated from a lookaside list */
463 if (pobj->BaseFlags & BASEFLAG_LOOKASIDE)
464 {
465 ExFreeToPagedLookasideList(&gpaLookasideList[objt], pobj);
466 }
467 else
468 {
469 ExFreePoolWithTag(pobj, GDIOBJ_POOL_TAG(objt));
470 }
471 }
472
473 VOID
474 NTAPI
475 GDIOBJ_vDereferenceObject(POBJ pobj)
476 {
477 ULONG cRefs, ulIndex;
478
479 /* Log the event */
480 DBG_LOGEVENT(&pobj->slhLog, EVENT_DEREFERENCE, cRefs);
481
482 /* Check if the object has a handle */
483 if (GDI_HANDLE_GET_INDEX(pobj->hHmgr))
484 {
485 /* Calculate the index */
486 ulIndex = GDI_HANDLE_GET_INDEX(pobj->hHmgr);
487
488 /* Decrement reference count */
489 ASSERT((gpaulRefCount[ulIndex] & REF_MASK_COUNT) > 0);
490 cRefs = InterlockedDecrement((LONG*)&gpaulRefCount[ulIndex]);
491
492 /* Check if we reached 0 and handle bit is not set */
493 if ((cRefs & REF_MASK_INUSE) == 0)
494 {
495 /* Make sure it's ok to delete the object */
496 ASSERT(pobj->BaseFlags & BASEFLAG_READY_TO_DIE);
497
498 /* Check if the handle was process owned */
499 if (gpentHmgr[ulIndex].ObjectOwner.ulObj != GDI_OBJ_HMGR_PUBLIC &&
500 gpentHmgr[ulIndex].ObjectOwner.ulObj != GDI_OBJ_HMGR_NONE)
501 {
502 /* Decrement the process handle count */
503 ASSERT(gpentHmgr[ulIndex].ObjectOwner.ulObj ==
504 HandleToUlong(PsGetCurrentProcessId()));
505 DecrementGdiHandleCount();
506 }
507
508 /* Push entry to the free list */
509 ENTRY_vPushFreeEntry(&gpentHmgr[ulIndex]);
510
511 /* Free the object */
512 GDIOBJ_vFreeObject(pobj);
513 }
514 }
515 else
516 {
517 /* Decrement the objects reference count */
518 ASSERT(pobj->ulShareCount > 0);
519 cRefs = InterlockedDecrement((LONG*)&pobj->ulShareCount);
520
521 /* Check if we reached 0 */
522 if (cRefs == 0)
523 {
524 /* Free the object */
525 GDIOBJ_vFreeObject(pobj);
526 }
527 }
528 }
529
530 POBJ
531 NTAPI
532 GDIOBJ_ReferenceObjectByHandle(
533 HGDIOBJ hobj,
534 UCHAR objt)
535 {
536 PENTRY pentry;
537 POBJ pobj;
538
539 /* Check if the handle type matches */
540 ASSERT_SHARED_OBJECT_TYPE(objt);
541 if ((((ULONG_PTR)hobj >> 16) & 0x1f) != objt)
542 {
543 DPRINT("GDIOBJ: Wrong type. handle=%p, type=%x\n", hobj, objt);
544 return NULL;
545 }
546
547 /* Reference the handle entry */
548 pentry = ENTRY_ReferenceEntryByHandle(hobj, 0);
549 if (!pentry)
550 {
551 DPRINT("GDIOBJ: Requested handle 0x%p is not valid.\n", hobj);
552 return NULL;
553 }
554
555 /* Get the pointer to the BASEOBJECT */
556 pobj = pentry->einfo.pobj;
557
558 /* Check if the object is exclusively locked */
559 if (pobj->cExclusiveLock != 0)
560 {
561 DPRINT1("GDIOBJ: Cannot reference oject %p with exclusive lock.\n", hobj);
562 GDIOBJ_vDereferenceObject(pobj);
563 DBG_DUMP_EVENT_LIST(&pobj->slhLog);
564 return NULL;
565 }
566
567 DBG_LOGEVENT(&pobj->slhLog, EVENT_REFERENCE, gpaulRefCount[pentry - gpentHmgr]);
568
569 /* All is well, return the object */
570 return pobj;
571 }
572
573 VOID
574 NTAPI
575 GDIOBJ_vReferenceObjectByPointer(POBJ pobj)
576 {
577 ULONG cRefs;
578
579 /* Check if the object has a handle */
580 if (GDI_HANDLE_GET_INDEX(pobj->hHmgr))
581 {
582 /* Increase the handle's reference count */
583 ULONG ulIndex = GDI_HANDLE_GET_INDEX(pobj->hHmgr);
584 ASSERT((gpaulRefCount[ulIndex] & REF_MASK_COUNT) > 0);
585 cRefs = InterlockedIncrement((LONG*)&gpaulRefCount[ulIndex]);
586 }
587 else
588 {
589 /* Increase the object's reference count */
590 cRefs = InterlockedIncrement((LONG*)&pobj->ulShareCount);
591 }
592
593 DBG_LOGEVENT(&pobj->slhLog, EVENT_REFERENCE, cRefs);
594 }
595
596 PGDIOBJ
597 NTAPI
598 GDIOBJ_LockObject(
599 HGDIOBJ hobj,
600 UCHAR objt)
601 {
602 PENTRY pentry;
603 POBJ pobj;
604 DWORD dwThreadId;
605
606 /* Check if the handle type matches */
607 ASSERT_EXCLUSIVE_OBJECT_TYPE(objt);
608 if ((((ULONG_PTR)hobj >> 16) & 0x1f) != objt)
609 {
610 DPRINT("Wrong object type: hobj=0x%p, objt=0x%x\n", hobj, objt);
611 return NULL;
612 }
613
614 /* Reference the handle entry */
615 pentry = ENTRY_ReferenceEntryByHandle(hobj, 0);
616 if (!pentry)
617 {
618 DPRINT("GDIOBJ: Requested handle 0x%p is not valid.\n", hobj);
619 return NULL;
620 }
621
622 /* Get the pointer to the BASEOBJECT */
623 pobj = pentry->einfo.pobj;
624
625 /* Check if we already own the lock */
626 dwThreadId = PtrToUlong(PsGetCurrentThreadId());
627 if (pobj->dwThreadId != dwThreadId)
628 {
629 /* Disable APCs and acquire the push lock */
630 KeEnterCriticalRegion();
631 ExAcquirePushLockExclusive(&pobj->pushlock);
632
633 /* Set us as lock owner */
634 ASSERT(pobj->dwThreadId == 0);
635 pobj->dwThreadId = dwThreadId;
636 }
637
638 /* Increase lock count */
639 pobj->cExclusiveLock++;
640 DBG_INCREASE_LOCK_COUNT(PsGetCurrentProcessWin32Process(), hobj);
641 DBG_LOGEVENT(&pobj->slhLog, EVENT_LOCK, 0);
642
643 /* Return the object */
644 return pobj;
645 }
646
647 VOID
648 NTAPI
649 GDIOBJ_vUnlockObject(POBJ pobj)
650 {
651 ULONG cRefs, ulIndex;
652 ASSERT(pobj->cExclusiveLock > 0);
653
654 /* Decrease lock count */
655 pobj->cExclusiveLock--;
656 DBG_DECREASE_LOCK_COUNT(PsGetCurrentProcessWin32Process(), pobj->hHmgr);
657 DBG_LOGEVENT(&pobj->slhLog, EVENT_UNLOCK, 0);
658
659 /* Check if this was the last lock */
660 if (pobj->cExclusiveLock == 0)
661 {
662 /* Reset lock owner */
663 pobj->dwThreadId = 0;
664
665 /* Release the pushlock and reenable APCs */
666 ExReleasePushLockExclusive(&pobj->pushlock);
667 KeLeaveCriticalRegion();
668 }
669
670 /* Calculate the index */
671 ulIndex = GDI_HANDLE_GET_INDEX(pobj->hHmgr);
672
673 /* Decrement reference count */
674 ASSERT((gpaulRefCount[ulIndex] & REF_MASK_COUNT) > 0);
675 cRefs = InterlockedDecrement((LONG*)&gpaulRefCount[ulIndex]);
676 ASSERT(cRefs & REF_MASK_VALID);
677 }
678
679 HGDIOBJ
680 NTAPI
681 GDIOBJ_hInsertObject(
682 POBJ pobj,
683 ULONG ulOwner)
684 {
685 PENTRY pentry;
686 UCHAR objt;
687
688 /* Must have no handle and only one reference */
689 ASSERT(GDI_HANDLE_GET_INDEX(pobj->hHmgr) == 0);
690 ASSERT(pobj->cExclusiveLock == 0);
691 ASSERT(pobj->ulShareCount == 1);
692
693 /* Get a free handle entry */
694 pentry = ENTRY_pentPopFreeEntry();
695 if (!pentry)
696 {
697 DPRINT1("GDIOBJ: Could not get a free entry.\n");
698 return NULL;
699 }
700
701 /* Make the object exclusively locked */
702 ExInitializePushLock(&pobj->pushlock);
703 KeEnterCriticalRegion();
704 ExAcquirePushLockExclusive(&pobj->pushlock);
705 pobj->cExclusiveLock = 1;
706 pobj->dwThreadId = PtrToUlong(PsGetCurrentThreadId());
707 DBG_INCREASE_LOCK_COUNT(PsGetCurrentProcessWin32Process(), pobj->hHmgr);
708
709 /* Get object type from the hHmgr field */
710 objt = ((ULONG_PTR)pobj->hHmgr >> 16) & 0xff;
711 ASSERT(objt != GDIObjType_DEF_TYPE);
712
713 /* Check if current process is requested owner */
714 if (ulOwner == GDI_OBJ_HMGR_POWNED)
715 {
716 /* Increment the process handle count */
717 IncrementGdiHandleCount();
718
719 /* Use Process id */
720 ulOwner = HandleToUlong(PsGetCurrentProcessId());
721 }
722
723 /* Insert the object into the handle table */
724 pobj->hHmgr = ENTRY_hInsertObject(pentry, pobj, objt, ulOwner);
725
726 /* Return the handle */
727 DPRINT("GDIOBJ: Created handle: %p\n", pobj->hHmgr);
728 DBG_LOGEVENT(&pobj->slhLog, EVENT_CREATE_HANDLE, 0);
729 return pobj->hHmgr;
730 }
731
732 VOID
733 NTAPI
734 GDIOBJ_vSetObjectOwner(
735 POBJ pobj,
736 ULONG ulOwner)
737 {
738 PENTRY pentry;
739
740 /* This is a ugly HACK, needed to fix IntGdiSetDCOwnerEx */
741 if (GDI_HANDLE_IS_STOCKOBJ(pobj->hHmgr))
742 {
743 DPRINT("Trying to set ownership of stock object %p to %lx\n", pobj->hHmgr, ulOwner);
744 return;
745 }
746
747 /* Get the handle entry */
748 ASSERT(GDI_HANDLE_GET_INDEX(pobj->hHmgr));
749 pentry = &gpentHmgr[GDI_HANDLE_GET_INDEX(pobj->hHmgr)];
750
751 /* Is the current process requested? */
752 if (ulOwner == GDI_OBJ_HMGR_POWNED)
753 {
754 /* Use process id */
755 ulOwner = HandleToUlong(PsGetCurrentProcessId());
756 if (pentry->ObjectOwner.ulObj != ulOwner)
757 {
758 IncrementGdiHandleCount();
759 }
760 }
761
762 // HACK
763 if (ulOwner == GDI_OBJ_HMGR_NONE)
764 ulOwner = GDI_OBJ_HMGR_PUBLIC;
765
766 if (ulOwner == GDI_OBJ_HMGR_PUBLIC ||
767 ulOwner == GDI_OBJ_HMGR_NONE)
768 {
769 /* Make sure we don't leak user mode memory */
770 ASSERT(pentry->pUser == NULL);
771 if (pentry->ObjectOwner.ulObj != GDI_OBJ_HMGR_PUBLIC &&
772 pentry->ObjectOwner.ulObj != GDI_OBJ_HMGR_NONE)
773 {
774 DecrementGdiHandleCount();
775 }
776 }
777
778 /* Set new owner */
779 pentry->ObjectOwner.ulObj = ulOwner;
780 }
781
782 /* Locks 2 or 3 objects at a time */
783 BOOL
784 NTAPI
785 GDIOBJ_bLockMultipleObjects(
786 IN ULONG ulCount,
787 IN HGDIOBJ* ahObj,
788 OUT PGDIOBJ* apObj,
789 IN UCHAR objt)
790 {
791 UINT auiIndices[3] = {0, 1, 2};
792 UINT i, j, tmp;
793
794 ASSERT(ulCount <= 3);
795
796 /* Sort the handles */
797 for (i = 0; i < ulCount - 1; i++)
798 {
799 for (j = i + 1; j < ulCount; j++)
800 {
801 if ((ULONG_PTR)ahObj[auiIndices[i]] <
802 (ULONG_PTR)ahObj[auiIndices[j]])
803 {
804 tmp = auiIndices[i];
805 auiIndices[i] = auiIndices[j];
806 auiIndices[j] = tmp;
807 }
808 }
809 }
810
811 /* Lock the objects in safe order */
812 for (i = 0; i < ulCount; i++)
813 {
814 /* Skip NULL handles */
815 if (ahObj[auiIndices[i]] == NULL)
816 {
817 apObj[auiIndices[i]] = NULL;
818 continue;
819 }
820
821 /* Lock the object */
822 apObj[auiIndices[i]] = GDIOBJ_LockObject(ahObj[auiIndices[i]], objt);
823
824 /* Check for failure */
825 if (apObj[auiIndices[i]] == NULL)
826 {
827 /* Cleanup */
828 while (i--)
829 {
830 if (apObj[auiIndices[i]])
831 GDIOBJ_vUnlockObject(apObj[auiIndices[i]]);
832 }
833 return FALSE;
834 }
835 }
836
837 return TRUE;
838 }
839
840 PVOID
841 NTAPI
842 GDIOBJ_pvGetObjectAttr(POBJ pobj)
843 {
844 ULONG ulIndex = GDI_HANDLE_GET_INDEX(pobj->hHmgr);
845 return gpentHmgr[ulIndex].pUser;
846 }
847
848 VOID
849 NTAPI
850 GDIOBJ_vSetObjectAttr(POBJ pobj, PVOID pvObjAttr)
851 {
852 ULONG ulIndex;
853
854 ASSERT(pobj->hHmgr);
855
856 /* Get the handle index */
857 ulIndex = GDI_HANDLE_GET_INDEX(pobj->hHmgr);
858
859 /* Set pointer to the usermode attribute */
860 gpentHmgr[ulIndex].pUser = pvObjAttr;
861 }
862
863 VOID
864 NTAPI
865 GDIOBJ_vDeleteObject(POBJ pobj)
866 {
867 ULONG ulIndex;
868
869 /* Set the object's delete flag */
870 InterlockedOr16((SHORT*)&pobj->BaseFlags, BASEFLAG_READY_TO_DIE);
871 DBG_LOGEVENT(&pobj->slhLog, EVENT_DELETE, 0);
872
873 /* Get the handle index */
874 ulIndex = GDI_HANDLE_GET_INDEX(pobj->hHmgr);
875 if (ulIndex)
876 {
877 /* Reset the handle valid bit */
878 InterlockedAnd((LONG*)&gpaulRefCount[ulIndex], ~REF_MASK_VALID);
879
880 /* Check if the object is exclusively locked */
881 if (pobj->cExclusiveLock != 0)
882 {
883 /* Reset lock owner and lock count */
884 pobj->dwThreadId = 0;
885 pobj->cExclusiveLock = 0;
886
887 /* Release the pushlock and reenable APCs */
888 ExReleasePushLockExclusive(&pobj->pushlock);
889 KeLeaveCriticalRegion();
890 DBG_DECREASE_LOCK_COUNT(PsGetCurrentProcessWin32Process(), pobj->hHmgr);
891 }
892 }
893
894 /* Dereference the object (will take care of deletion) */
895 GDIOBJ_vDereferenceObject(pobj);
896 }
897
898 BOOL
899 NTAPI
900 GreIsHandleValid(HGDIOBJ hobj)
901 {
902 PENTRY pentry;
903
904 pentry = ENTRY_ReferenceEntryByHandle(hobj, 0);
905 if (!pentry) return FALSE;
906 GDIOBJ_vDereferenceObject(pentry->einfo.pobj);
907 return TRUE;
908 }
909
910 BOOL
911 NTAPI
912 GreDeleteObject(HGDIOBJ hobj)
913 {
914 PENTRY pentry;
915
916 /* Check for stock objects */
917 if (GDI_HANDLE_IS_STOCKOBJ(hobj))
918 {
919 DPRINT1("GreDeleteObject: Cannot delete stock object %p.\n", hobj);
920 return FALSE;
921 }
922
923 /* Reference the handle entry */
924 pentry = ENTRY_ReferenceEntryByHandle(hobj, 0);
925 if (!pentry)
926 {
927 DPRINT1("GreDeleteObject: Trying to delete invalid object %p\n", hobj);
928 return FALSE;
929 }
930
931 /* Check for public owner */
932 if (pentry->ObjectOwner.ulObj == GDI_OBJ_HMGR_PUBLIC)
933 {
934 DPRINT1("GreDeleteObject: Trying to delete global object %p\n", hobj);
935 GDIOBJ_vDereferenceObject(pentry->einfo.pobj);
936 return FALSE;
937 }
938
939 /* Delete the object */
940 GDIOBJ_vDeleteObject(pentry->einfo.pobj);
941 return TRUE;
942 }
943
944 ULONG
945 NTAPI
946 GreGetObjectOwner(HGDIOBJ hobj)
947 {
948 ULONG ulIndex, ulOwner;
949
950 /* Get the handle index */
951 ulIndex = GDI_HANDLE_GET_INDEX(hobj);
952
953 /* Check if the handle is valid */
954 if (ulIndex >= GDI_HANDLE_COUNT ||
955 gpentHmgr[ulIndex].Objt == GDIObjType_DEF_TYPE ||
956 ((ULONG_PTR)hobj >> 16) != gpentHmgr[ulIndex].FullUnique)
957 {
958 DPRINT1("GreGetObjectOwner: invalid handle 0x%p.\n", hobj);
959 return GDI_OBJ_HMGR_RESTRICTED;
960 }
961
962 /* Get the object owner */
963 ulOwner = gpentHmgr[ulIndex].ObjectOwner.ulObj;
964
965 if (ulOwner == HandleToUlong(PsGetCurrentProcessId()))
966 return GDI_OBJ_HMGR_POWNED;
967
968 if (ulOwner == GDI_OBJ_HMGR_PUBLIC)
969 return GDI_OBJ_HMGR_PUBLIC;
970
971 return GDI_OBJ_HMGR_RESTRICTED;
972 }
973
974 BOOL
975 NTAPI
976 GreSetObjectOwner(
977 HGDIOBJ hobj,
978 ULONG ulOwner)
979 {
980 PENTRY pentry;
981
982 /* Check for stock objects */
983 if (GDI_HANDLE_IS_STOCKOBJ(hobj))
984 {
985 DPRINT("GreSetObjectOwner: Got stock object %p\n", hobj);
986 return FALSE;
987 }
988
989 /* Reference the handle entry */
990 pentry = ENTRY_ReferenceEntryByHandle(hobj, 0);
991 if (!pentry)
992 {
993 DPRINT("GreSetObjectOwner: Invalid handle 0x%p.\n", hobj);
994 return FALSE;
995 }
996
997 /* Call internal function */
998 GDIOBJ_vSetObjectOwner(pentry->einfo.pobj, ulOwner);
999
1000 /* Dereference the object */
1001 GDIOBJ_vDereferenceObject(pentry->einfo.pobj);
1002
1003 return TRUE;
1004 }
1005
1006 INT
1007 NTAPI
1008 GreGetObject(
1009 IN HGDIOBJ hobj,
1010 IN INT cbCount,
1011 IN PVOID pvBuffer)
1012 {
1013 PVOID pvObj;
1014 UCHAR objt;
1015 INT iResult = 0;
1016
1017 /* Verify object type */
1018 objt = ((ULONG_PTR)hobj >> 16) & 0x1f;
1019 if (objt != GDIObjType_BRUSH_TYPE &&
1020 objt != GDIObjType_SURF_TYPE &&
1021 objt != GDIObjType_LFONT_TYPE &&
1022 objt != GDIObjType_PAL_TYPE)
1023 {
1024 DPRINT1("GreGetObject: Invalid object type\n");
1025 return 0;
1026 }
1027
1028 pvObj = GDIOBJ_ReferenceObjectByHandle(hobj, objt);
1029 if (!pvObj)
1030 {
1031 DPRINT("GreGetObject: Could not lock object\n");
1032 return 0;
1033 }
1034
1035 switch (GDI_HANDLE_GET_TYPE(hobj))
1036 {
1037 case GDILoObjType_LO_PEN_TYPE:
1038 case GDILoObjType_LO_EXTPEN_TYPE:
1039 iResult = PEN_GetObject(pvObj, cbCount, pvBuffer);
1040 break;
1041
1042 case GDILoObjType_LO_BRUSH_TYPE:
1043 iResult = BRUSH_GetObject(pvObj, cbCount, pvBuffer);
1044 break;
1045
1046 case GDILoObjType_LO_BITMAP_TYPE:
1047 iResult = BITMAP_GetObject(pvObj, cbCount, pvBuffer);
1048 break;
1049
1050 case GDILoObjType_LO_FONT_TYPE:
1051 iResult = FontGetObject(pvObj, cbCount, pvBuffer);
1052 break;
1053
1054 case GDILoObjType_LO_PALETTE_TYPE:
1055 iResult = PALETTE_GetObject(pvObj, cbCount, pvBuffer);
1056 break;
1057
1058 default:
1059 DPRINT1("GDI object type of 0x%p not implemented\n", hobj);
1060 break;
1061 }
1062
1063 GDIOBJ_vDereferenceObject(pvObj);
1064 return iResult;
1065 }
1066
1067 W32KAPI
1068 INT
1069 APIENTRY
1070 NtGdiExtGetObjectW(
1071 IN HANDLE hobj,
1072 IN INT cbCount,
1073 OUT LPVOID lpBuffer)
1074 {
1075 INT iRetCount = 0;
1076 INT cbCopyCount;
1077 union
1078 {
1079 BITMAP bitmap;
1080 DIBSECTION dibsection;
1081 LOGPEN logpen;
1082 LOGBRUSH logbrush;
1083 LOGFONTW logfontw;
1084 EXTLOGFONTW extlogfontw;
1085 ENUMLOGFONTEXDVW enumlogfontexdvw;
1086 } object;
1087
1088 /* Normalize to the largest supported object size */
1089 cbCount = min((UINT)cbCount, sizeof(object));
1090
1091 /* Now do the actual call */
1092 iRetCount = GreGetObject(hobj, cbCount, lpBuffer ? &object : NULL);
1093 cbCopyCount = min((UINT)cbCount, (UINT)iRetCount);
1094
1095 /* Make sure we have a buffer and a copy size */
1096 if ((cbCopyCount) && (lpBuffer))
1097 {
1098 /* Enter SEH for buffer transfer */
1099 _SEH2_TRY
1100 {
1101 /* Probe the buffer and copy it */
1102 ProbeForWrite(lpBuffer, cbCopyCount, sizeof(WORD));
1103 RtlCopyMemory(lpBuffer, &object, cbCopyCount);
1104 }
1105 _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1106 {
1107 /* Clear the return value.
1108 * Do *NOT* set last error here! */
1109 iRetCount = 0;
1110 }
1111 _SEH2_END;
1112 }
1113
1114 /* Return the count */
1115 return iRetCount;
1116 }
1117
1118 W32KAPI
1119 HANDLE
1120 APIENTRY
1121 NtGdiCreateClientObj(
1122 IN ULONG ulType)
1123 {
1124 POBJ pObject;
1125 HANDLE handle;
1126
1127 /* Allocate a new object */
1128 pObject = GDIOBJ_AllocateObject(GDIObjType_CLIENTOBJ_TYPE,
1129 sizeof(CLIENTOBJ),
1130 BASEFLAG_LOOKASIDE);
1131 if (!pObject)
1132 {
1133 DPRINT1("NtGdiCreateClientObj: Could not allocate a clientobj.\n");
1134 return NULL;
1135 }
1136
1137 /* Mask out everything that would change the type in a wrong manner */
1138 ulType &= (GDI_HANDLE_TYPE_MASK & ~GDI_HANDLE_BASETYPE_MASK);
1139
1140 /* Set the real object type */
1141 pObject->hHmgr = UlongToHandle(ulType | GDILoObjType_LO_CLIENTOBJ_TYPE);
1142
1143 /* Create a handle */
1144 handle = GDIOBJ_hInsertObject(pObject, GDI_OBJ_HMGR_POWNED);
1145 if (!handle)
1146 {
1147 DPRINT1("NtGdiCreateClientObj: Could not create a handle.\n");
1148 GDIOBJ_vFreeObject(pObject);
1149 return NULL;
1150 }
1151
1152 /* Unlock it */
1153 GDIOBJ_vUnlockObject(pObject);
1154
1155 return handle;
1156 }
1157
1158 W32KAPI
1159 BOOL
1160 APIENTRY
1161 NtGdiDeleteClientObj(
1162 IN HANDLE hobj)
1163 {
1164 /* We first need to get the real type from the handle */
1165 ULONG ulType = GDI_HANDLE_GET_TYPE(hobj);
1166
1167 /* Check if it's really a CLIENTOBJ */
1168 if ((ulType & GDI_HANDLE_BASETYPE_MASK) != GDILoObjType_LO_CLIENTOBJ_TYPE)
1169 {
1170 /* FIXME: SetLastError? */
1171 return FALSE;
1172 }
1173
1174 return GreDeleteObject(hobj);
1175 }
1176
1177
1178
1179 PGDI_HANDLE_TABLE GdiHandleTable = NULL;
1180
1181 PGDIOBJ NTAPI
1182 GDIOBJ_ShareLockObj(HGDIOBJ hObj, DWORD ExpectedType)
1183 {
1184 if (ExpectedType == GDI_OBJECT_TYPE_DONTCARE)
1185 ExpectedType = GDI_HANDLE_GET_TYPE(hObj);
1186 return GDIOBJ_ReferenceObjectByHandle(hObj, (ExpectedType >> 16) & 0x1f);
1187 }
1188
1189 // This function is not safe to use with concurrent deleting attempts
1190 // That shouldn't be a problem, since we don't have any processes yet,
1191 // that could delete the handle
1192 BOOL
1193 NTAPI
1194 GDIOBJ_ConvertToStockObj(HGDIOBJ *phObj)
1195 {
1196 PENTRY pentry;
1197 POBJ pobj;
1198
1199 /* Reference the handle entry */
1200 pentry = ENTRY_ReferenceEntryByHandle(*phObj, 0);
1201 if (!pentry)
1202 {
1203 DPRINT1("GDIOBJ: Requested handle 0x%p is not valid.\n", *phObj);
1204 return FALSE;
1205 }
1206
1207 /* Update the entry */
1208 pentry->FullUnique |= GDI_ENTRY_STOCK_MASK;
1209 pentry->ObjectOwner.ulObj = 0;
1210
1211 /* Get the pointer to the BASEOBJECT */
1212 pobj = pentry->einfo.pobj;
1213
1214 /* Calculate the new handle */
1215 pobj->hHmgr = (HGDIOBJ)((ULONG_PTR)pobj->hHmgr | GDI_HANDLE_STOCK_MASK);
1216
1217 /* Return the new handle */
1218 *phObj = pobj->hHmgr;
1219
1220 /* Dereference the handle */
1221 GDIOBJ_vDereferenceObject(pobj);
1222
1223 return TRUE;
1224 }
1225
1226 POBJ NTAPI
1227 GDIOBJ_AllocObjWithHandle(ULONG ObjectType, ULONG cjSize)
1228 {
1229 POBJ pobj;
1230 FLONG fl = 0;
1231 UCHAR objt = (ObjectType >> 16) & 0xFF;
1232
1233 if ((objt == GDIObjType_DC_TYPE && cjSize == sizeof(DC)) ||
1234 (objt == GDIObjType_PAL_TYPE && cjSize == sizeof(PALETTE)) ||
1235 (objt == GDIObjType_RGN_TYPE && cjSize == sizeof(REGION)) ||
1236 (objt == GDIObjType_SURF_TYPE && cjSize == sizeof(SURFACE)) ||
1237 (objt == GDIObjType_PATH_TYPE && cjSize == sizeof(PATH)))
1238 {
1239 fl |= BASEFLAG_LOOKASIDE;
1240 }
1241
1242 pobj = GDIOBJ_AllocateObject(objt, cjSize, fl);
1243 if (!GDIOBJ_hInsertObject(pobj, GDI_OBJ_HMGR_POWNED))
1244 {
1245 GDIOBJ_vFreeObject(pobj);
1246 return NULL;
1247 }
1248 return pobj;
1249 }
1250
1251 PVOID NTAPI
1252 GDI_MapHandleTable(PEPROCESS pProcess)
1253 {
1254 PVOID pvMappedView = NULL;
1255 NTSTATUS Status;
1256 LARGE_INTEGER liOffset;
1257 ULONG cjViewSize = sizeof(GDI_HANDLE_TABLE);
1258
1259 liOffset.QuadPart = 0;
1260
1261 ASSERT(gpvGdiHdlTblSection != NULL);
1262 ASSERT(pProcess != NULL);
1263
1264 Status = MmMapViewOfSection(gpvGdiHdlTblSection,
1265 pProcess,
1266 &pvMappedView,
1267 0,
1268 0,
1269 &liOffset,
1270 &cjViewSize,
1271 ViewUnmap,
1272 SEC_NO_CHANGE,
1273 PAGE_READONLY);
1274
1275 if (!NT_SUCCESS(Status))
1276 return NULL;
1277
1278 return pvMappedView;
1279 }
1280
1281 BOOL NTAPI
1282 GDI_CleanupForProcess(struct _EPROCESS *Process)
1283 {
1284 PENTRY pentry;
1285 ULONG ulIndex;
1286 DWORD dwProcessId;
1287 PPROCESSINFO ppi;
1288
1289 DPRINT("CleanupForProcess prochandle %x Pid %d\n",
1290 Process, Process->UniqueProcessId);
1291
1292 ASSERT(Process == PsGetCurrentProcess());
1293
1294 /* Get the current process Id */
1295 dwProcessId = PtrToUlong(PsGetCurrentProcessId());
1296
1297 /* Loop all handles in the handle table */
1298 for (ulIndex = RESERVE_ENTRIES_COUNT; ulIndex < gulFirstUnused; ulIndex++)
1299 {
1300 pentry = &gpentHmgr[ulIndex];
1301
1302 /* Check if the object is owned by the process */
1303 if (pentry->ObjectOwner.ulObj == dwProcessId)
1304 {
1305 ASSERT(pentry->einfo.pobj->cExclusiveLock == 0);
1306
1307 /* Reference the object and delete it */
1308 InterlockedIncrement((LONG*)&gpaulRefCount[ulIndex]);
1309 GDIOBJ_vDeleteObject(pentry->einfo.pobj);
1310 }
1311 }
1312
1313 #if DBG
1314 //#ifdef GDI_DEBUG
1315 DbgGdiHTIntegrityCheck();
1316 //#endif
1317 #endif
1318
1319 ppi = PsGetCurrentProcessWin32Process();
1320 DPRINT("Completed cleanup for process %d\n", Process->UniqueProcessId);
1321 if (ppi->GDIHandleCount != 0)
1322 {
1323 DPRINT1("Leaking %d handles!\n", ppi->GDIHandleCount);
1324 ASSERT(FALSE);
1325 }
1326
1327 /* Loop all handles in the handle table */
1328 for (ulIndex = RESERVE_ENTRIES_COUNT; ulIndex < gulFirstUnused; ulIndex++)
1329 {
1330 pentry = &gpentHmgr[ulIndex];
1331
1332 /* Check if the object is owned by the process */
1333 if (pentry->ObjectOwner.ulObj == dwProcessId)
1334 {
1335 DPRINT1("Leaking object. Index=%lx, type=0x%x, refcount=%lx\n",
1336 ulIndex, pentry->Objt, gpaulRefCount[ulIndex]);
1337 DBG_DUMP_EVENT_LIST(&pentry->einfo.pobj->slhLog);
1338 //DBG_CLEANUP_EVENT_LIST(&pentry->einfo.pobj->slhLog);
1339 ASSERT(FALSE);
1340 }
1341 }
1342
1343 return TRUE;
1344 }
1345
1346 /* EOF */