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FreeBSD compile fix.
[wine.git] / memory / heap.c
blob2bd6e2c40a6356091444ca065ce521317e451ae7
1 /*
2 * Win32 heap functions
3 *
4 * Copyright 1996 Alexandre Julliard
5 * Copyright 1998 Ulrich Weigand
6 */
7
8 #include <assert.h>
9 #include <stdlib.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include "wine/winbase16.h"
13 #include "wine/winestring.h"
14 #include "selectors.h"
15 #include "global.h"
16 #include "winbase.h"
17 #include "winerror.h"
18 #include "winnt.h"
19 #include "heap.h"
20 #include "toolhelp.h"
21 #include "debugtools.h"
22
23 DEFAULT_DEBUG_CHANNEL(heap);
24
25 /* Note: the heap data structures are based on what Pietrek describes in his
26 * book 'Windows 95 System Programming Secrets'. The layout is not exactly
27 * the same, but could be easily adapted if it turns out some programs
28 * require it.
29 */
30
31 typedef struct tagARENA_INUSE
32 {
33 DWORD size; /* Block size; must be the first field */
34 WORD threadId; /* Allocating thread id */
35 WORD magic; /* Magic number */
36 void *callerEIP; /* EIP of caller upon allocation */
37 } ARENA_INUSE;
38
39 typedef struct tagARENA_FREE
40 {
41 DWORD size; /* Block size; must be the first field */
42 WORD threadId; /* Freeing thread id */
43 WORD magic; /* Magic number */
44 struct tagARENA_FREE *next; /* Next free arena */
45 struct tagARENA_FREE *prev; /* Prev free arena */
46 } ARENA_FREE;
47
48 #define ARENA_FLAG_FREE 0x00000001 /* flags OR'ed with arena size */
49 #define ARENA_FLAG_PREV_FREE 0x00000002
50 #define ARENA_SIZE_MASK 0xfffffffc
51 #define ARENA_INUSE_MAGIC 0x4842 /* Value for arena 'magic' field */
52 #define ARENA_FREE_MAGIC 0x4846 /* Value for arena 'magic' field */
53
54 #define ARENA_INUSE_FILLER 0x55
55 #define ARENA_FREE_FILLER 0xaa
56
57 #define QUIET 1 /* Suppress messages */
58 #define NOISY 0 /* Report all errors */
59
60 #define HEAP_NB_FREE_LISTS 4 /* Number of free lists */
61
62 /* Max size of the blocks on the free lists */
63 static const DWORD HEAP_freeListSizes[HEAP_NB_FREE_LISTS] =
64 {
65 0x20, 0x80, 0x200, 0xffffffff
66 };
67
68 typedef struct
69 {
70 DWORD size;
71 ARENA_FREE arena;
72 } FREE_LIST_ENTRY;
73
74 struct tagHEAP;
75
76 typedef struct tagSUBHEAP
77 {
78 DWORD size; /* Size of the whole sub-heap */
79 DWORD commitSize; /* Committed size of the sub-heap */
80 DWORD headerSize; /* Size of the heap header */
81 struct tagSUBHEAP *next; /* Next sub-heap */
82 struct tagHEAP *heap; /* Main heap structure */
83 DWORD magic; /* Magic number */
84 WORD selector; /* Selector for HEAP_WINE_SEGPTR heaps */
85 } SUBHEAP;
86
87 #define SUBHEAP_MAGIC ((DWORD)('S' | ('U'<<8) | ('B'<<16) | ('H'<<24)))
88
89 typedef struct tagHEAP
90 {
91 SUBHEAP subheap; /* First sub-heap */
92 struct tagHEAP *next; /* Next heap for this process */
93 FREE_LIST_ENTRY freeList[HEAP_NB_FREE_LISTS]; /* Free lists */
94 CRITICAL_SECTION critSection; /* Critical section for serialization */
95 DWORD flags; /* Heap flags */
96 DWORD magic; /* Magic number */
97 void *private; /* Private pointer for the user of the heap */
98 } HEAP;
99
100 #define HEAP_MAGIC ((DWORD)('H' | ('E'<<8) | ('A'<<16) | ('P'<<24)))
101
102 #define HEAP_DEF_SIZE 0x110000 /* Default heap size = 1Mb + 64Kb */
103 #define HEAP_MIN_BLOCK_SIZE (8+sizeof(ARENA_FREE)) /* Min. heap block size */
104
105 HANDLE SystemHeap = 0;
106 HANDLE SegptrHeap = 0;
107
108 SYSTEM_HEAP_DESCR *SystemHeapDescr = 0;
109
110 static HEAP *processHeap; /* main process heap */
111 static HEAP *firstHeap; /* head of secondary heaps list */
112
113 /* address where we try to map the system heap */
114 #define SYSTEM_HEAP_BASE ((void*)0x65430000)
115
116 static BOOL HEAP_IsRealArena( HANDLE heap, DWORD flags, LPCVOID block, BOOL quiet );
117
118 #ifdef __GNUC__
119 #define GET_EIP() (__builtin_return_address(0))
120 #define SET_EIP(ptr) ((ARENA_INUSE*)(ptr) - 1)->callerEIP = GET_EIP()
121 #else
122 #define GET_EIP() 0
123 #define SET_EIP(ptr) /* nothing */
124 #endif /* __GNUC__ */
125
126 /***********************************************************************
127 * HEAP_Dump
128 */
129 void HEAP_Dump( HEAP *heap )
130 {
131 int i;
132 SUBHEAP *subheap;
133 char *ptr;
134
135 DPRINTF( "Heap: %08lx\n", (DWORD)heap );
136 DPRINTF( "Next: %08lx Sub-heaps: %08lx",
137 (DWORD)heap->next, (DWORD)&heap->subheap );
138 subheap = &heap->subheap;
139 while (subheap->next)
140 {
141 DPRINTF( " -> %08lx", (DWORD)subheap->next );
142 subheap = subheap->next;
143 }
144
145 DPRINTF( "\nFree lists:\n Block Stat Size Id\n" );
146 for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
147 DPRINTF( "%08lx free %08lx %04x prev=%08lx next=%08lx\n",
148 (DWORD)&heap->freeList[i].arena, heap->freeList[i].arena.size,
149 heap->freeList[i].arena.threadId,
150 (DWORD)heap->freeList[i].arena.prev,
151 (DWORD)heap->freeList[i].arena.next );
152
153 subheap = &heap->subheap;
154 while (subheap)
155 {
156 DWORD freeSize = 0, usedSize = 0, arenaSize = subheap->headerSize;
157 DPRINTF( "\n\nSub-heap %08lx: size=%08lx committed=%08lx\n",
158 (DWORD)subheap, subheap->size, subheap->commitSize );
159
160 DPRINTF( "\n Block Stat Size Id\n" );
161 ptr = (char*)subheap + subheap->headerSize;
162 while (ptr < (char *)subheap + subheap->size)
163 {
164 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
165 {
166 ARENA_FREE *pArena = (ARENA_FREE *)ptr;
167 DPRINTF( "%08lx free %08lx %04x prev=%08lx next=%08lx\n",
168 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK,
169 pArena->threadId, (DWORD)pArena->prev,
170 (DWORD)pArena->next);
171 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
172 arenaSize += sizeof(ARENA_FREE);
173 freeSize += pArena->size & ARENA_SIZE_MASK;
174 }
175 else if (*(DWORD *)ptr & ARENA_FLAG_PREV_FREE)
176 {
177 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
178 DPRINTF( "%08lx Used %08lx %04x back=%08lx EIP=%p\n",
179 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK,
180 pArena->threadId, *((DWORD *)pArena - 1),
181 pArena->callerEIP );
182 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
183 arenaSize += sizeof(ARENA_INUSE);
184 usedSize += pArena->size & ARENA_SIZE_MASK;
185 }
186 else
187 {
188 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
189 DPRINTF( "%08lx used %08lx %04x EIP=%p\n",
190 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK,
191 pArena->threadId, pArena->callerEIP );
192 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
193 arenaSize += sizeof(ARENA_INUSE);
194 usedSize += pArena->size & ARENA_SIZE_MASK;
195 }
196 }
197 DPRINTF( "\nTotal: Size=%08lx Committed=%08lx Free=%08lx Used=%08lx Arenas=%08lx (%ld%%)\n\n",
198 subheap->size, subheap->commitSize, freeSize, usedSize,
199 arenaSize, (arenaSize * 100) / subheap->size );
200 subheap = subheap->next;
201 }
202 }
203
204
205 /***********************************************************************
206 * HEAP_GetPtr
207 * RETURNS
208 * Pointer to the heap
209 * NULL: Failure
210 */
211 static HEAP *HEAP_GetPtr(
212 HANDLE heap /* [in] Handle to the heap */
213 ) {
214 HEAP *heapPtr = (HEAP *)heap;
215 if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
216 {
217 ERR("Invalid heap %08x!\n", heap );
218 SetLastError( ERROR_INVALID_HANDLE );
219 return NULL;
220 }
221 if (TRACE_ON(heap) && !HEAP_IsRealArena( heap, 0, NULL, NOISY ))
222 {
223 HEAP_Dump( heapPtr );
224 assert( FALSE );
225 SetLastError( ERROR_INVALID_HANDLE );
226 return NULL;
227 }
228 return heapPtr;
229 }
230
231
232 /***********************************************************************
233 * HEAP_InsertFreeBlock
234 *
235 * Insert a free block into the free list.
236 */
237 static void HEAP_InsertFreeBlock( HEAP *heap, ARENA_FREE *pArena )
238 {
239 FREE_LIST_ENTRY *pEntry = heap->freeList;
240 while (pEntry->size < pArena->size) pEntry++;
241 pArena->size |= ARENA_FLAG_FREE;
242 pArena->next = pEntry->arena.next;
243 pArena->next->prev = pArena;
244 pArena->prev = &pEntry->arena;
245 pEntry->arena.next = pArena;
246 }
247
248
249 /***********************************************************************
250 * HEAP_FindSubHeap
251 * Find the sub-heap containing a given address.
252 *
253 * RETURNS
254 * Pointer: Success
255 * NULL: Failure
256 */
257 static SUBHEAP *HEAP_FindSubHeap(
258 HEAP *heap, /* [in] Heap pointer */
259 LPCVOID ptr /* [in] Address */
260 ) {
261 SUBHEAP *sub = &heap->subheap;
262 while (sub)
263 {
264 if (((char *)ptr >= (char *)sub) &&
265 ((char *)ptr < (char *)sub + sub->size)) return sub;
266 sub = sub->next;
267 }
268 return NULL;
269 }
270
271
272 /***********************************************************************
273 * HEAP_Commit
274 *
275 * Make sure the heap storage is committed up to (not including) ptr.
276 */
277 static BOOL HEAP_Commit( SUBHEAP *subheap, void *ptr )
278 {
279 DWORD size = (DWORD)((char *)ptr - (char *)subheap);
280 DWORD pageMask = VIRTUAL_GetPageSize() - 1;
281 size = (size + pageMask) & ~pageMask; /* Align size on a page boundary */
282 if (size > subheap->size) size = subheap->size;
283 if (size <= subheap->commitSize) return TRUE;
284 if (!VirtualAlloc( (char *)subheap + subheap->commitSize,
285 size - subheap->commitSize, MEM_COMMIT,
286 PAGE_EXECUTE_READWRITE))
287 {
288 WARN("Could not commit %08lx bytes at %08lx for heap %08lx\n",
289 size - subheap->commitSize,
290 (DWORD)((char *)subheap + subheap->commitSize),
291 (DWORD)subheap->heap );
292 return FALSE;
293 }
294 subheap->commitSize = size;
295 return TRUE;
296 }
297
298
299 /***********************************************************************
300 * HEAP_Decommit
301 *
302 * If possible, decommit the heap storage from (including) 'ptr'.
303 */
304 static BOOL HEAP_Decommit( SUBHEAP *subheap, void *ptr )
305 {
306 DWORD size = (DWORD)((char *)ptr - (char *)subheap);
307 DWORD pageMask = VIRTUAL_GetPageSize() - 1;
308 size = (size + pageMask) & ~pageMask; /* Align size on a page boundary */
309 if (size >= subheap->commitSize) return TRUE;
310 if (!VirtualFree( (char *)subheap + size,
311 subheap->commitSize - size, MEM_DECOMMIT ))
312 {
313 WARN("Could not decommit %08lx bytes at %08lx for heap %08lx\n",
314 subheap->commitSize - size,
315 (DWORD)((char *)subheap + size),
316 (DWORD)subheap->heap );
317 return FALSE;
318 }
319 subheap->commitSize = size;
320 return TRUE;
321 }
322
323
324 /***********************************************************************
325 * HEAP_CreateFreeBlock
326 *
327 * Create a free block at a specified address. 'size' is the size of the
328 * whole block, including the new arena.
329 */
330 static void HEAP_CreateFreeBlock( SUBHEAP *subheap, void *ptr, DWORD size )
331 {
332 ARENA_FREE *pFree;
333
334 /* Create a free arena */
335
336 pFree = (ARENA_FREE *)ptr;
337 pFree->threadId = GetCurrentTask();
338 pFree->magic = ARENA_FREE_MAGIC;
339
340 /* If debugging, erase the freed block content */
341
342 if (TRACE_ON(heap))
343 {
344 char *pEnd = (char *)ptr + size;
345 if (pEnd > (char *)subheap + subheap->commitSize)
346 pEnd = (char *)subheap + subheap->commitSize;
347 if (pEnd > (char *)(pFree + 1))
348 memset( pFree + 1, ARENA_FREE_FILLER, pEnd - (char *)(pFree + 1) );
349 }
350
351 /* Check if next block is free also */
352
353 if (((char *)ptr + size < (char *)subheap + subheap->size) &&
354 (*(DWORD *)((char *)ptr + size) & ARENA_FLAG_FREE))
355 {
356 /* Remove the next arena from the free list */
357 ARENA_FREE *pNext = (ARENA_FREE *)((char *)ptr + size);
358 pNext->next->prev = pNext->prev;
359 pNext->prev->next = pNext->next;
360 size += (pNext->size & ARENA_SIZE_MASK) + sizeof(*pNext);
361 if (TRACE_ON(heap))
362 memset( pNext, ARENA_FREE_FILLER, sizeof(ARENA_FREE) );
363 }
364
365 /* Set the next block PREV_FREE flag and pointer */
366
367 if ((char *)ptr + size < (char *)subheap + subheap->size)
368 {
369 DWORD *pNext = (DWORD *)((char *)ptr + size);
370 *pNext |= ARENA_FLAG_PREV_FREE;
371 *(ARENA_FREE **)(pNext - 1) = pFree;
372 }
373
374 /* Last, insert the new block into the free list */
375
376 pFree->size = size - sizeof(*pFree);
377 HEAP_InsertFreeBlock( subheap->heap, pFree );
378 }
379
380
381 /***********************************************************************
382 * HEAP_MakeInUseBlockFree
383 *
384 * Turn an in-use block into a free block. Can also decommit the end of
385 * the heap, and possibly even free the sub-heap altogether.
386 */
387 static void HEAP_MakeInUseBlockFree( SUBHEAP *subheap, ARENA_INUSE *pArena )
388 {
389 ARENA_FREE *pFree;
390 DWORD size = (pArena->size & ARENA_SIZE_MASK) + sizeof(*pArena);
391
392 /* Check if we can merge with previous block */
393
394 if (pArena->size & ARENA_FLAG_PREV_FREE)
395 {
396 pFree = *((ARENA_FREE **)pArena - 1);
397 size += (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE);
398 /* Remove it from the free list */
399 pFree->next->prev = pFree->prev;
400 pFree->prev->next = pFree->next;
401 }
402 else pFree = (ARENA_FREE *)pArena;
403
404 /* Create a free block */
405
406 HEAP_CreateFreeBlock( subheap, pFree, size );
407 size = (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE);
408 if ((char *)pFree + size < (char *)subheap + subheap->size)
409 return; /* Not the last block, so nothing more to do */
410
411 /* Free the whole sub-heap if it's empty and not the original one */
412
413 if (((char *)pFree == (char *)subheap + subheap->headerSize) &&
414 (subheap != &subheap->heap->subheap))
415 {
416 SUBHEAP *pPrev = &subheap->heap->subheap;
417 /* Remove the free block from the list */
418 pFree->next->prev = pFree->prev;
419 pFree->prev->next = pFree->next;
420 /* Remove the subheap from the list */
421 while (pPrev && (pPrev->next != subheap)) pPrev = pPrev->next;
422 if (pPrev) pPrev->next = subheap->next;
423 /* Free the memory */
424 subheap->magic = 0;
425 if (subheap->selector) FreeSelector16( subheap->selector );
426 VirtualFree( subheap, 0, MEM_RELEASE );
427 return;
428 }
429
430 /* Decommit the end of the heap */
431
432 if (!(subheap->heap->flags & HEAP_WINE_SHARED)) HEAP_Decommit( subheap, pFree + 1 );
433 }
434
435
436 /***********************************************************************
437 * HEAP_ShrinkBlock
438 *
439 * Shrink an in-use block.
440 */
441 static void HEAP_ShrinkBlock(SUBHEAP *subheap, ARENA_INUSE *pArena, DWORD size)
442 {
443 if ((pArena->size & ARENA_SIZE_MASK) >= size + HEAP_MIN_BLOCK_SIZE)
444 {
445 HEAP_CreateFreeBlock( subheap, (char *)(pArena + 1) + size,
446 (pArena->size & ARENA_SIZE_MASK) - size );
447 pArena->size = (pArena->size & ~ARENA_SIZE_MASK) | size;
448 }
449 else
450 {
451 /* Turn off PREV_FREE flag in next block */
452 char *pNext = (char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK);
453 if (pNext < (char *)subheap + subheap->size)
454 *(DWORD *)pNext &= ~ARENA_FLAG_PREV_FREE;
455 }
456 }
457
458 /***********************************************************************
459 * HEAP_InitSubHeap
460 */
461 static BOOL HEAP_InitSubHeap( HEAP *heap, LPVOID address, DWORD flags,
462 DWORD commitSize, DWORD totalSize )
463 {
464 SUBHEAP *subheap = (SUBHEAP *)address;
465 WORD selector = 0;
466 FREE_LIST_ENTRY *pEntry;
467 int i;
468
469 /* Commit memory */
470
471 if (flags & HEAP_WINE_SHARED)
472 commitSize = totalSize; /* always commit everything in a shared heap */
473 if (!VirtualAlloc(address, commitSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE))
474 {
475 WARN("Could not commit %08lx bytes for sub-heap %08lx\n",
476 commitSize, (DWORD)address );
477 return FALSE;
478 }
479
480 /* Allocate a selector if needed */
481
482 if (flags & HEAP_WINE_SEGPTR)
483 {
484 selector = SELECTOR_AllocBlock( address, totalSize,
485 (flags & (HEAP_WINE_CODESEG|HEAP_WINE_CODE16SEG))
486 ? SEGMENT_CODE : SEGMENT_DATA,
487 (flags & HEAP_WINE_CODESEG) != 0, FALSE );
488 if (!selector)
489 {
490 ERR("Could not allocate selector\n" );
491 return FALSE;
492 }
493 }
494
495 /* Fill the sub-heap structure */
496
497 subheap->heap = heap;
498 subheap->selector = selector;
499 subheap->size = totalSize;
500 subheap->commitSize = commitSize;
501 subheap->magic = SUBHEAP_MAGIC;
502
503 if ( subheap != (SUBHEAP *)heap )
504 {
505 /* If this is a secondary subheap, insert it into list */
506
507 subheap->headerSize = sizeof(SUBHEAP);
508 subheap->next = heap->subheap.next;
509 heap->subheap.next = subheap;
510 }
511 else
512 {
513 /* If this is a primary subheap, initialize main heap */
514
515 subheap->headerSize = sizeof(HEAP);
516 subheap->next = NULL;
517 heap->next = NULL;
518 heap->flags = flags;
519 heap->magic = HEAP_MAGIC;
520
521 /* Build the free lists */
522
523 for (i = 0, pEntry = heap->freeList; i < HEAP_NB_FREE_LISTS; i++, pEntry++)
524 {
525 pEntry->size = HEAP_freeListSizes[i];
526 pEntry->arena.size = 0 | ARENA_FLAG_FREE;
527 pEntry->arena.next = i < HEAP_NB_FREE_LISTS-1 ?
528 &heap->freeList[i+1].arena : &heap->freeList[0].arena;
529 pEntry->arena.prev = i ? &heap->freeList[i-1].arena :
530 &heap->freeList[HEAP_NB_FREE_LISTS-1].arena;
531 pEntry->arena.threadId = 0;
532 pEntry->arena.magic = ARENA_FREE_MAGIC;
533 }
534
535 /* Initialize critical section */
536
537 InitializeCriticalSection( &heap->critSection );
538 if (!SystemHeap) MakeCriticalSectionGlobal( &heap->critSection );
539 }
540
541 /* Create the first free block */
542
543 HEAP_CreateFreeBlock( subheap, (LPBYTE)subheap + subheap->headerSize,
544 subheap->size - subheap->headerSize );
545
546 return TRUE;
547 }
548
549 /***********************************************************************
550 * HEAP_CreateSubHeap
551 *
552 * Create a sub-heap of the given size.
553 * If heap == NULL, creates a main heap.
554 */
555 static SUBHEAP *HEAP_CreateSubHeap( HEAP *heap, DWORD flags,
556 DWORD commitSize, DWORD totalSize )
557 {
558 LPVOID address;
559
560 /* Round-up sizes on a 64K boundary */
561
562 if (flags & HEAP_WINE_SEGPTR)
563 {
564 totalSize = commitSize = 0x10000; /* Only 64K at a time for SEGPTRs */
565 }
566 else
567 {
568 totalSize = (totalSize + 0xffff) & 0xffff0000;
569 commitSize = (commitSize + 0xffff) & 0xffff0000;
570 if (!commitSize) commitSize = 0x10000;
571 if (totalSize < commitSize) totalSize = commitSize;
572 }
573
574 /* Allocate the memory block */
575
576 if (!(address = VirtualAlloc( NULL, totalSize,
577 MEM_RESERVE, PAGE_EXECUTE_READWRITE )))
578 {
579 WARN("Could not VirtualAlloc %08lx bytes\n",
580 totalSize );
581 return NULL;
582 }
583
584 /* Initialize subheap */
585
586 if (!HEAP_InitSubHeap( heap? heap : (HEAP *)address,
587 address, flags, commitSize, totalSize ))
588 {
589 VirtualFree( address, 0, MEM_RELEASE );
590 return NULL;
591 }
592
593 return (SUBHEAP *)address;
594 }
595
596
597 /***********************************************************************
598 * HEAP_FindFreeBlock
599 *
600 * Find a free block at least as large as the requested size, and make sure
601 * the requested size is committed.
602 */
603 static ARENA_FREE *HEAP_FindFreeBlock( HEAP *heap, DWORD size,
604 SUBHEAP **ppSubHeap )
605 {
606 SUBHEAP *subheap;
607 ARENA_FREE *pArena;
608 FREE_LIST_ENTRY *pEntry = heap->freeList;
609
610 /* Find a suitable free list, and in it find a block large enough */
611
612 while (pEntry->size < size) pEntry++;
613 pArena = pEntry->arena.next;
614 while (pArena != &heap->freeList[0].arena)
615 {
616 if (pArena->size > size)
617 {
618 subheap = HEAP_FindSubHeap( heap, pArena );
619 if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE)
620 + size + HEAP_MIN_BLOCK_SIZE))
621 return NULL;
622 *ppSubHeap = subheap;
623 return pArena;
624 }
625
626 pArena = pArena->next;
627 }
628
629 /* If no block was found, attempt to grow the heap */
630
631 if (!(heap->flags & HEAP_GROWABLE))
632 {
633 WARN("Not enough space in heap %08lx for %08lx bytes\n",
634 (DWORD)heap, size );
635 return NULL;
636 }
637 size += sizeof(SUBHEAP) + sizeof(ARENA_FREE);
638 if (!(subheap = HEAP_CreateSubHeap( heap, heap->flags, size,
639 max( HEAP_DEF_SIZE, size ) )))
640 return NULL;
641
642 TRACE("created new sub-heap %08lx of %08lx bytes for heap %08lx\n",
643 (DWORD)subheap, size, (DWORD)heap );
644
645 *ppSubHeap = subheap;
646 return (ARENA_FREE *)(subheap + 1);
647 }
648
649
650 /***********************************************************************
651 * HEAP_IsValidArenaPtr
652 *
653 * Check that the pointer is inside the range possible for arenas.
654 */
655 static BOOL HEAP_IsValidArenaPtr( HEAP *heap, void *ptr )
656 {
657 int i;
658 SUBHEAP *subheap = HEAP_FindSubHeap( heap, ptr );
659 if (!subheap) return FALSE;
660 if ((char *)ptr >= (char *)subheap + subheap->headerSize) return TRUE;
661 if (subheap != &heap->subheap) return FALSE;
662 for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
663 if (ptr == (void *)&heap->freeList[i].arena) return TRUE;
664 return FALSE;
665 }
666
667
668 /***********************************************************************
669 * HEAP_ValidateFreeArena
670 */
671 static BOOL HEAP_ValidateFreeArena( SUBHEAP *subheap, ARENA_FREE *pArena )
672 {
673 char *heapEnd = (char *)subheap + subheap->size;
674
675 /* Check magic number */
676 if (pArena->magic != ARENA_FREE_MAGIC)
677 {
678 ERR("Heap %08lx: invalid free arena magic for %08lx\n",
679 (DWORD)subheap->heap, (DWORD)pArena );
680 return FALSE;
681 }
682 /* Check size flags */
683 if (!(pArena->size & ARENA_FLAG_FREE) ||
684 (pArena->size & ARENA_FLAG_PREV_FREE))
685 {
686 ERR("Heap %08lx: bad flags %lx for free arena %08lx\n",
687 (DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena );
688 }
689 /* Check arena size */
690 if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
691 {
692 ERR("Heap %08lx: bad size %08lx for free arena %08lx\n",
693 (DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena );
694 return FALSE;
695 }
696 /* Check that next pointer is valid */
697 if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->next ))
698 {
699 ERR("Heap %08lx: bad next ptr %08lx for arena %08lx\n",
700 (DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena );
701 return FALSE;
702 }
703 /* Check that next arena is free */
704 if (!(pArena->next->size & ARENA_FLAG_FREE) ||
705 (pArena->next->magic != ARENA_FREE_MAGIC))
706 {
707 ERR("Heap %08lx: next arena %08lx invalid for %08lx\n",
708 (DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena );
709 return FALSE;
710 }
711 /* Check that prev pointer is valid */
712 if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->prev ))
713 {
714 ERR("Heap %08lx: bad prev ptr %08lx for arena %08lx\n",
715 (DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena );
716 return FALSE;
717 }
718 /* Check that prev arena is free */
719 if (!(pArena->prev->size & ARENA_FLAG_FREE) ||
720 (pArena->prev->magic != ARENA_FREE_MAGIC))
721 {
722 ERR("Heap %08lx: prev arena %08lx invalid for %08lx\n",
723 (DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena );
724 return FALSE;
725 }
726 /* Check that next block has PREV_FREE flag */
727 if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd)
728 {
729 if (!(*(DWORD *)((char *)(pArena + 1) +
730 (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
731 {
732 ERR("Heap %08lx: free arena %08lx next block has no PREV_FREE flag\n",
733 (DWORD)subheap->heap, (DWORD)pArena );
734 return FALSE;
735 }
736 /* Check next block back pointer */
737 if (*((ARENA_FREE **)((char *)(pArena + 1) +
738 (pArena->size & ARENA_SIZE_MASK)) - 1) != pArena)
739 {
740 ERR("Heap %08lx: arena %08lx has wrong back ptr %08lx\n",
741 (DWORD)subheap->heap, (DWORD)pArena,
742 *((DWORD *)((char *)(pArena+1)+ (pArena->size & ARENA_SIZE_MASK)) - 1));
743 return FALSE;
744 }
745 }
746 return TRUE;
747 }
748
749
750 /***********************************************************************
751 * HEAP_ValidateInUseArena
752 */
753 static BOOL HEAP_ValidateInUseArena( SUBHEAP *subheap, ARENA_INUSE *pArena, BOOL quiet )
754 {
755 char *heapEnd = (char *)subheap + subheap->size;
756
757 /* Check magic number */
758 if (pArena->magic != ARENA_INUSE_MAGIC)
759 {
760 if (quiet == NOISY) {
761 ERR("Heap %08lx: invalid in-use arena magic for %08lx\n",
762 (DWORD)subheap->heap, (DWORD)pArena );
763 if (TRACE_ON(heap))
764 HEAP_Dump( subheap->heap );
765 } else if (WARN_ON(heap)) {
766 WARN("Heap %08lx: invalid in-use arena magic for %08lx\n",
767 (DWORD)subheap->heap, (DWORD)pArena );
768 if (TRACE_ON(heap))
769 HEAP_Dump( subheap->heap );
770 }
771 return FALSE;
772 }
773 /* Check size flags */
774 if (pArena->size & ARENA_FLAG_FREE)
775 {
776 ERR("Heap %08lx: bad flags %lx for in-use arena %08lx\n",
777 (DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena );
778 }
779 /* Check arena size */
780 if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
781 {
782 ERR("Heap %08lx: bad size %08lx for in-use arena %08lx\n",
783 (DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena );
784 return FALSE;
785 }
786 /* Check next arena PREV_FREE flag */
787 if (((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd) &&
788 (*(DWORD *)((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
789 {
790 ERR("Heap %08lx: in-use arena %08lx next block has PREV_FREE flag\n",
791 (DWORD)subheap->heap, (DWORD)pArena );
792 return FALSE;
793 }
794 /* Check prev free arena */
795 if (pArena->size & ARENA_FLAG_PREV_FREE)
796 {
797 ARENA_FREE *pPrev = *((ARENA_FREE **)pArena - 1);
798 /* Check prev pointer */
799 if (!HEAP_IsValidArenaPtr( subheap->heap, pPrev ))
800 {
801 ERR("Heap %08lx: bad back ptr %08lx for arena %08lx\n",
802 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
803 return FALSE;
804 }
805 /* Check that prev arena is free */
806 if (!(pPrev->size & ARENA_FLAG_FREE) ||
807 (pPrev->magic != ARENA_FREE_MAGIC))
808 {
809 ERR("Heap %08lx: prev arena %08lx invalid for in-use %08lx\n",
810 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
811 return FALSE;
812 }
813 /* Check that prev arena is really the previous block */
814 if ((char *)(pPrev + 1) + (pPrev->size & ARENA_SIZE_MASK) != (char *)pArena)
815 {
816 ERR("Heap %08lx: prev arena %08lx is not prev for in-use %08lx\n",
817 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
818 return FALSE;
819 }
820 }
821 return TRUE;
822 }
823
824
825 /***********************************************************************
826 * HEAP_IsInsideHeap
827 * Checks whether the pointer points to a block inside a given heap.
828 *
829 * NOTES
830 * Should this return BOOL32?
831 *
832 * RETURNS
833 * !0: Success
834 * 0: Failure
835 */
836 int HEAP_IsInsideHeap(
837 HANDLE heap, /* [in] Heap */
838 DWORD flags, /* [in] Flags */
839 LPCVOID ptr /* [in] Pointer */
840 ) {
841 HEAP *heapPtr = HEAP_GetPtr( heap );
842 SUBHEAP *subheap;
843 int ret;
844
845 /* Validate the parameters */
846
847 if (!heapPtr) return 0;
848 flags |= heapPtr->flags;
849 if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap );
850 ret = (((subheap = HEAP_FindSubHeap( heapPtr, ptr )) != NULL) &&
851 (((char *)ptr >= (char *)subheap + subheap->headerSize
852 + sizeof(ARENA_INUSE))));
853 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
854 return ret;
855 }
856
857
858 /***********************************************************************
859 * HEAP_GetSegptr
860 *
861 * Transform a linear pointer into a SEGPTR. The pointer must have been
862 * allocated from a HEAP_WINE_SEGPTR heap.
863 */
864 SEGPTR HEAP_GetSegptr( HANDLE heap, DWORD flags, LPCVOID ptr )
865 {
866 HEAP *heapPtr = HEAP_GetPtr( heap );
867 SUBHEAP *subheap;
868 SEGPTR ret;
869
870 /* Validate the parameters */
871
872 if (!heapPtr) return 0;
873 flags |= heapPtr->flags;
874 if (!(flags & HEAP_WINE_SEGPTR))
875 {
876 ERR("Heap %08x is not a SEGPTR heap\n",
877 heap );
878 return 0;
879 }
880 if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap );
881
882 /* Get the subheap */
883
884 if (!(subheap = HEAP_FindSubHeap( heapPtr, ptr )))
885 {
886 ERR("%p is not inside heap %08x\n",
887 ptr, heap );
888 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
889 return 0;
890 }
891
892 /* Build the SEGPTR */
893
894 ret = PTR_SEG_OFF_TO_SEGPTR(subheap->selector, (DWORD)ptr-(DWORD)subheap);
895 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
896 return ret;
897 }
898
899 /***********************************************************************
900 * HEAP_IsRealArena [Internal]
901 * Validates a block is a valid arena.
902 *
903 * RETURNS
904 * TRUE: Success
905 * FALSE: Failure
906 */
907 static BOOL HEAP_IsRealArena(
908 HANDLE heap, /* [in] Handle to the heap */
909 DWORD flags, /* [in] Bit flags that control access during operation */
910 LPCVOID block, /* [in] Optional pointer to memory block to validate */
911 BOOL quiet /* [in] Flag - if true, HEAP_ValidateInUseArena
912 * does not complain */
913 ) {
914 SUBHEAP *subheap;
915 HEAP *heapPtr = (HEAP *)(heap);
916 BOOL ret = TRUE;
917
918 if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
919 {
920 ERR("Invalid heap %08x!\n", heap );
921 return FALSE;
922 }
923
924 flags &= HEAP_NO_SERIALIZE;
925 flags |= heapPtr->flags;
926 /* calling HeapLock may result in infinite recursion, so do the critsect directly */
927 if (!(flags & HEAP_NO_SERIALIZE))
928 EnterCriticalSection( &heapPtr->critSection );
929
930 if (block)
931 {
932 /* Only check this single memory block */
933
934 /* The following code is really HEAP_IsInsideHeap *
935 * with serialization already done. */
936 if (!(subheap = HEAP_FindSubHeap( heapPtr, block )) ||
937 ((char *)block < (char *)subheap + subheap->headerSize
938 + sizeof(ARENA_INUSE)))
939 {
940 if (quiet == NOISY)
941 ERR("Heap %08lx: block %08lx is not inside heap\n",
942 (DWORD)heap, (DWORD)block );
943 else if (WARN_ON(heap))
944 WARN("Heap %08lx: block %08lx is not inside heap\n",
945 (DWORD)heap, (DWORD)block );
946 ret = FALSE;
947 } else
948 ret = HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)block - 1, quiet );
949
950 if (!(flags & HEAP_NO_SERIALIZE))
951 LeaveCriticalSection( &heapPtr->critSection );
952 return ret;
953 }
954
955 subheap = &heapPtr->subheap;
956 while (subheap && ret)
957 {
958 char *ptr = (char *)subheap + subheap->headerSize;
959 while (ptr < (char *)subheap + subheap->size)
960 {
961 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
962 {
963 if (!HEAP_ValidateFreeArena( subheap, (ARENA_FREE *)ptr )) {
964 ret = FALSE;
965 break;
966 }
967 ptr += sizeof(ARENA_FREE) + (*(DWORD *)ptr & ARENA_SIZE_MASK);
968 }
969 else
970 {
971 if (!HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)ptr, NOISY )) {
972 ret = FALSE;
973 break;
974 }
975 ptr += sizeof(ARENA_INUSE) + (*(DWORD *)ptr & ARENA_SIZE_MASK);
976 }
977 }
978 subheap = subheap->next;
979 }
980
981 if (!(flags & HEAP_NO_SERIALIZE))
982 LeaveCriticalSection( &heapPtr->critSection );
983 return ret;
984 }
985
986
987 /***********************************************************************
988 * HeapCreate (KERNEL32.336)
989 * RETURNS
990 * Handle of heap: Success
991 * NULL: Failure
992 */
993 HANDLE WINAPI HeapCreate(
994 DWORD flags, /* [in] Heap allocation flag */
995 DWORD initialSize, /* [in] Initial heap size */
996 DWORD maxSize /* [in] Maximum heap size */
997 ) {
998 SUBHEAP *subheap;
999
1000 /* Allocate the heap block */
1001
1002 if (!maxSize)
1003 {
1004 maxSize = HEAP_DEF_SIZE;
1005 flags |= HEAP_GROWABLE;
1006 }
1007 if (!(subheap = HEAP_CreateSubHeap( NULL, flags, initialSize, maxSize )))
1008 {
1009 SetLastError( ERROR_OUTOFMEMORY );
1010 return 0;
1011 }
1012
1013 /* link it into the per-process heap list */
1014 if (processHeap)
1015 {
1016 HEAP *heapPtr = subheap->heap;
1017 EnterCriticalSection( &processHeap->critSection );
1018 heapPtr->next = firstHeap;
1019 firstHeap = heapPtr;
1020 LeaveCriticalSection( &processHeap->critSection );
1021 }
1022 else /* assume the first heap we create is the process main heap */
1023 {
1024 processHeap = subheap->heap;
1025 }
1026
1027 return (HANDLE)subheap;
1028 }
1029
1030 /***********************************************************************
1031 * HeapDestroy (KERNEL32.337)
1032 * RETURNS
1033 * TRUE: Success
1034 * FALSE: Failure
1035 */
1036 BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
1037 {
1038 HEAP *heapPtr = HEAP_GetPtr( heap );
1039 SUBHEAP *subheap;
1040
1041 TRACE("%08x\n", heap );
1042 if (!heapPtr) return FALSE;
1043
1044 if (heapPtr == processHeap) /* cannot delete the main process heap */
1045 {
1046 SetLastError( ERROR_INVALID_PARAMETER );
1047 return FALSE;
1048 }
1049 else /* remove it from the per-process list */
1050 {
1051 HEAP **pptr;
1052 EnterCriticalSection( &processHeap->critSection );
1053 pptr = &firstHeap;
1054 while (*pptr && *pptr != heapPtr) pptr = &(*pptr)->next;
1055 if (*pptr) *pptr = (*pptr)->next;
1056 LeaveCriticalSection( &processHeap->critSection );
1057 }
1058
1059 DeleteCriticalSection( &heapPtr->critSection );
1060 subheap = &heapPtr->subheap;
1061 while (subheap)
1062 {
1063 SUBHEAP *next = subheap->next;
1064 if (subheap->selector) FreeSelector16( subheap->selector );
1065 VirtualFree( subheap, 0, MEM_RELEASE );
1066 subheap = next;
1067 }
1068 return TRUE;
1069 }
1070
1071
1072 /***********************************************************************
1073 * HeapAlloc (KERNEL32.334)
1074 * RETURNS
1075 * Pointer to allocated memory block
1076 * NULL: Failure
1077 */
1078 LPVOID WINAPI HeapAlloc(
1079 HANDLE heap, /* [in] Handle of private heap block */
1080 DWORD flags, /* [in] Heap allocation control flags */
1081 DWORD size /* [in] Number of bytes to allocate */
1082 ) {
1083 ARENA_FREE *pArena;
1084 ARENA_INUSE *pInUse;
1085 SUBHEAP *subheap;
1086 HEAP *heapPtr = HEAP_GetPtr( heap );
1087
1088 /* Validate the parameters */
1089
1090 if (!heapPtr) return NULL;
1091 flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY;
1092 flags |= heapPtr->flags;
1093 if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap );
1094 size = (size + 3) & ~3;
1095 if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
1096
1097 /* Locate a suitable free block */
1098
1099 if (!(pArena = HEAP_FindFreeBlock( heapPtr, size, &subheap )))
1100 {
1101 TRACE("(%08x,%08lx,%08lx): returning NULL\n",
1102 heap, flags, size );
1103 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1104 SetLastError( ERROR_COMMITMENT_LIMIT );
1105 return NULL;
1106 }
1107
1108 /* Remove the arena from the free list */
1109
1110 pArena->next->prev = pArena->prev;
1111 pArena->prev->next = pArena->next;
1112
1113 /* Build the in-use arena */
1114
1115 pInUse = (ARENA_INUSE *)pArena;
1116 pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE)
1117 + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
1118 pInUse->callerEIP = GET_EIP();
1119 pInUse->threadId = GetCurrentTask();
1120 pInUse->magic = ARENA_INUSE_MAGIC;
1121
1122 /* Shrink the block */
1123
1124 HEAP_ShrinkBlock( subheap, pInUse, size );
1125
1126 if (flags & HEAP_ZERO_MEMORY) memset( pInUse + 1, 0, size );
1127 else if (TRACE_ON(heap)) memset( pInUse + 1, ARENA_INUSE_FILLER, size );
1128
1129 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1130
1131 TRACE("(%08x,%08lx,%08lx): returning %08lx\n",
1132 heap, flags, size, (DWORD)(pInUse + 1) );
1133 return (LPVOID)(pInUse + 1);
1134 }
1135
1136
1137 /***********************************************************************
1138 * HeapFree (KERNEL32.338)
1139 * RETURNS
1140 * TRUE: Success
1141 * FALSE: Failure
1142 */
1143 BOOL WINAPI HeapFree(
1144 HANDLE heap, /* [in] Handle of heap */
1145 DWORD flags, /* [in] Heap freeing flags */
1146 LPVOID ptr /* [in] Address of memory to free */
1147 ) {
1148 ARENA_INUSE *pInUse;
1149 SUBHEAP *subheap;
1150 HEAP *heapPtr = HEAP_GetPtr( heap );
1151
1152 /* Validate the parameters */
1153
1154 if (!heapPtr) return FALSE;
1155 flags &= HEAP_NO_SERIALIZE;
1156 flags |= heapPtr->flags;
1157 if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap );
1158 if (!ptr)
1159 {
1160 WARN("(%08x,%08lx,%08lx): asked to free NULL\n",
1161 heap, flags, (DWORD)ptr );
1162 }
1163 if (!ptr || !HEAP_IsRealArena( heap, HEAP_NO_SERIALIZE, ptr, QUIET ))
1164 {
1165 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1166 SetLastError( ERROR_INVALID_PARAMETER );
1167 TRACE("(%08x,%08lx,%08lx): returning FALSE\n",
1168 heap, flags, (DWORD)ptr );
1169 return FALSE;
1170 }
1171
1172 /* Turn the block into a free block */
1173
1174 pInUse = (ARENA_INUSE *)ptr - 1;
1175 subheap = HEAP_FindSubHeap( heapPtr, pInUse );
1176 HEAP_MakeInUseBlockFree( subheap, pInUse );
1177
1178 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1179 /* SetLastError( 0 ); */
1180
1181 TRACE("(%08x,%08lx,%08lx): returning TRUE\n",
1182 heap, flags, (DWORD)ptr );
1183 return TRUE;
1184 }
1185
1186
1187 /***********************************************************************
1188 * HeapReAlloc (KERNEL32.340)
1189 * RETURNS
1190 * Pointer to reallocated memory block
1191 * NULL: Failure
1192 */
1193 LPVOID WINAPI HeapReAlloc(
1194 HANDLE heap, /* [in] Handle of heap block */
1195 DWORD flags, /* [in] Heap reallocation flags */
1196 LPVOID ptr, /* [in] Address of memory to reallocate */
1197 DWORD size /* [in] Number of bytes to reallocate */
1198 ) {
1199 ARENA_INUSE *pArena;
1200 DWORD oldSize;
1201 HEAP *heapPtr;
1202 SUBHEAP *subheap;
1203
1204 if (!ptr) return HeapAlloc( heap, flags, size ); /* FIXME: correct? */
1205 if (!(heapPtr = HEAP_GetPtr( heap ))) return FALSE;
1206
1207 /* Validate the parameters */
1208
1209 flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY |
1210 HEAP_REALLOC_IN_PLACE_ONLY;
1211 flags |= heapPtr->flags;
1212 size = (size + 3) & ~3;
1213 if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
1214
1215 if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap );
1216 if (!HEAP_IsRealArena( heap, HEAP_NO_SERIALIZE, ptr, QUIET ))
1217 {
1218 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1219 SetLastError( ERROR_INVALID_PARAMETER );
1220 TRACE("(%08x,%08lx,%08lx,%08lx): returning NULL\n",
1221 heap, flags, (DWORD)ptr, size );
1222 return NULL;
1223 }
1224
1225 /* Check if we need to grow the block */
1226
1227 pArena = (ARENA_INUSE *)ptr - 1;
1228 pArena->threadId = GetCurrentTask();
1229 subheap = HEAP_FindSubHeap( heapPtr, pArena );
1230 oldSize = (pArena->size & ARENA_SIZE_MASK);
1231 if (size > oldSize)
1232 {
1233 char *pNext = (char *)(pArena + 1) + oldSize;
1234 if ((pNext < (char *)subheap + subheap->size) &&
1235 (*(DWORD *)pNext & ARENA_FLAG_FREE) &&
1236 (oldSize + (*(DWORD *)pNext & ARENA_SIZE_MASK) + sizeof(ARENA_FREE) >= size))
1237 {
1238 /* The next block is free and large enough */
1239 ARENA_FREE *pFree = (ARENA_FREE *)pNext;
1240 pFree->next->prev = pFree->prev;
1241 pFree->prev->next = pFree->next;
1242 pArena->size += (pFree->size & ARENA_SIZE_MASK) + sizeof(*pFree);
1243 if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE)
1244 + size + HEAP_MIN_BLOCK_SIZE))
1245 {
1246 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1247 SetLastError( ERROR_OUTOFMEMORY );
1248 return NULL;
1249 }
1250 HEAP_ShrinkBlock( subheap, pArena, size );
1251 }
1252 else /* Do it the hard way */
1253 {
1254 ARENA_FREE *pNew;
1255 ARENA_INUSE *pInUse;
1256 SUBHEAP *newsubheap;
1257
1258 if ((flags & HEAP_REALLOC_IN_PLACE_ONLY) ||
1259 !(pNew = HEAP_FindFreeBlock( heapPtr, size, &newsubheap )))
1260 {
1261 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1262 SetLastError( ERROR_OUTOFMEMORY );
1263 return NULL;
1264 }
1265
1266 /* Build the in-use arena */
1267
1268 pNew->next->prev = pNew->prev;
1269 pNew->prev->next = pNew->next;
1270 pInUse = (ARENA_INUSE *)pNew;
1271 pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE)
1272 + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
1273 pInUse->threadId = GetCurrentTask();
1274 pInUse->magic = ARENA_INUSE_MAGIC;
1275 HEAP_ShrinkBlock( newsubheap, pInUse, size );
1276 memcpy( pInUse + 1, pArena + 1, oldSize );
1277
1278 /* Free the previous block */
1279
1280 HEAP_MakeInUseBlockFree( subheap, pArena );
1281 subheap = newsubheap;
1282 pArena = pInUse;
1283 }
1284 }
1285 else HEAP_ShrinkBlock( subheap, pArena, size ); /* Shrink the block */
1286
1287 /* Clear the extra bytes if needed */
1288
1289 if (size > oldSize)
1290 {
1291 if (flags & HEAP_ZERO_MEMORY)
1292 memset( (char *)(pArena + 1) + oldSize, 0,
1293 (pArena->size & ARENA_SIZE_MASK) - oldSize );
1294 else if (TRACE_ON(heap))
1295 memset( (char *)(pArena + 1) + oldSize, ARENA_INUSE_FILLER,
1296 (pArena->size & ARENA_SIZE_MASK) - oldSize );
1297 }
1298
1299 /* Return the new arena */
1300
1301 pArena->callerEIP = GET_EIP();
1302 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1303
1304 TRACE("(%08x,%08lx,%08lx,%08lx): returning %08lx\n",
1305 heap, flags, (DWORD)ptr, size, (DWORD)(pArena + 1) );
1306 return (LPVOID)(pArena + 1);
1307 }
1308
1309
1310 /***********************************************************************
1311 * HeapCompact (KERNEL32.335)
1312 */
1313 DWORD WINAPI HeapCompact( HANDLE heap, DWORD flags )
1314 {
1315 SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
1316 return 0;
1317 }
1318
1319
1320 /***********************************************************************
1321 * HeapLock (KERNEL32.339)
1322 * Attempts to acquire the critical section object for a specified heap.
1323 *
1324 * RETURNS
1325 * TRUE: Success
1326 * FALSE: Failure
1327 */
1328 BOOL WINAPI HeapLock(
1329 HANDLE heap /* [in] Handle of heap to lock for exclusive access */
1330 ) {
1331 HEAP *heapPtr = HEAP_GetPtr( heap );
1332 if (!heapPtr) return FALSE;
1333 EnterCriticalSection( &heapPtr->critSection );
1334 return TRUE;
1335 }
1336
1337
1338 /***********************************************************************
1339 * HeapUnlock (KERNEL32.342)
1340 * Releases ownership of the critical section object.
1341 *
1342 * RETURNS
1343 * TRUE: Success
1344 * FALSE: Failure
1345 */
1346 BOOL WINAPI HeapUnlock(
1347 HANDLE heap /* [in] Handle to the heap to unlock */
1348 ) {
1349 HEAP *heapPtr = HEAP_GetPtr( heap );
1350 if (!heapPtr) return FALSE;
1351 LeaveCriticalSection( &heapPtr->critSection );
1352 return TRUE;
1353 }
1354
1355
1356 /***********************************************************************
1357 * HeapSize (KERNEL32.341)
1358 * RETURNS
1359 * Size in bytes of allocated memory
1360 * 0xffffffff: Failure
1361 */
1362 DWORD WINAPI HeapSize(
1363 HANDLE heap, /* [in] Handle of heap */
1364 DWORD flags, /* [in] Heap size control flags */
1365 LPVOID ptr /* [in] Address of memory to return size for */
1366 ) {
1367 DWORD ret;
1368 HEAP *heapPtr = HEAP_GetPtr( heap );
1369
1370 if (!heapPtr) return FALSE;
1371 flags &= HEAP_NO_SERIALIZE;
1372 flags |= heapPtr->flags;
1373 if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap );
1374 if (!HEAP_IsRealArena( heap, HEAP_NO_SERIALIZE, ptr, QUIET ))
1375 {
1376 SetLastError( ERROR_INVALID_PARAMETER );
1377 ret = 0xffffffff;
1378 }
1379 else
1380 {
1381 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr - 1;
1382 ret = pArena->size & ARENA_SIZE_MASK;
1383 }
1384 if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1385
1386 TRACE("(%08x,%08lx,%08lx): returning %08lx\n",
1387 heap, flags, (DWORD)ptr, ret );
1388 return ret;
1389 }
1390
1391
1392 /***********************************************************************
1393 * HeapValidate (KERNEL32.343)
1394 * Validates a specified heap.
1395 *
1396 * NOTES
1397 * Flags is ignored.
1398 *
1399 * RETURNS
1400 * TRUE: Success
1401 * FALSE: Failure
1402 */
1403 BOOL WINAPI HeapValidate(
1404 HANDLE heap, /* [in] Handle to the heap */
1405 DWORD flags, /* [in] Bit flags that control access during operation */
1406 LPCVOID block /* [in] Optional pointer to memory block to validate */
1407 ) {
1408
1409 return HEAP_IsRealArena( heap, flags, block, QUIET );
1410 }
1411
1412
1413 /***********************************************************************
1414 * HeapWalk (KERNEL32.344)
1415 * Enumerates the memory blocks in a specified heap.
1416 * See HEAP_Dump() for info on heap structure.
1417 *
1418 * TODO
1419 * - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
1420 * PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
1421 *
1422 * RETURNS
1423 * TRUE: Success
1424 * FALSE: Failure
1425 */
1426 BOOL WINAPI HeapWalk(
1427 HANDLE heap, /* [in] Handle to heap to enumerate */
1428 LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
1429 ) {
1430 HEAP *heapPtr = HEAP_GetPtr(heap);
1431 SUBHEAP *sub, *currentheap = NULL;
1432 BOOL ret = FALSE;
1433 char *ptr;
1434 int region_index = 0;
1435
1436 if (!heapPtr || !entry)
1437 {
1438 SetLastError(ERROR_INVALID_PARAMETER);
1439 return FALSE;
1440 }
1441
1442 if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) HeapLock( heap );
1443
1444 /* set ptr to the next arena to be examined */
1445
1446 if (!entry->lpData) /* first call (init) ? */
1447 {
1448 TRACE("begin walking of heap 0x%08x.\n", heap);
1449 /*HEAP_Dump(heapPtr);*/
1450 currentheap = &heapPtr->subheap;
1451 ptr = (char*)currentheap + currentheap->headerSize;
1452 }
1453 else
1454 {
1455 ptr = entry->lpData;
1456 sub = &heapPtr->subheap;
1457 while (sub)
1458 {
1459 if (((char *)ptr >= (char *)sub) &&
1460 ((char *)ptr < (char *)sub + sub->size))
1461 {
1462 currentheap = sub;
1463 break;
1464 }
1465 sub = sub->next;
1466 region_index++;
1467 }
1468 if (currentheap == NULL)
1469 {
1470 ERR("no matching subheap found, shouldn't happen !\n");
1471 SetLastError(ERROR_NO_MORE_ITEMS);
1472 goto HW_end;
1473 }
1474
1475 ptr += entry->cbData; /* point to next arena */
1476 if (ptr > (char *)currentheap + currentheap->size - 1)
1477 { /* proceed with next subheap */
1478 if (!(currentheap = currentheap->next))
1479 { /* successfully finished */
1480 TRACE("end reached.\n");
1481 SetLastError(ERROR_NO_MORE_ITEMS);
1482 goto HW_end;
1483 }
1484 ptr = (char*)currentheap + currentheap->headerSize;
1485 }
1486 }
1487
1488 entry->wFlags = 0;
1489 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
1490 {
1491 ARENA_FREE *pArena = (ARENA_FREE *)ptr;
1492
1493 /*TRACE("free, magic: %04x\n", pArena->magic);*/
1494
1495 entry->lpData = pArena + 1;
1496 entry->cbData = pArena->size & ARENA_SIZE_MASK;
1497 entry->cbOverhead = sizeof(ARENA_FREE);
1498 entry->wFlags = PROCESS_HEAP_UNCOMMITTED_RANGE;
1499 }
1500 else
1501 {
1502 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
1503
1504 /*TRACE("busy, magic: %04x\n", pArena->magic);*/
1505
1506 entry->lpData = pArena + 1;
1507 entry->cbData = pArena->size & ARENA_SIZE_MASK;
1508 entry->cbOverhead = sizeof(ARENA_INUSE);
1509 entry->wFlags = PROCESS_HEAP_ENTRY_BUSY;
1510 /* FIXME: can't handle PROCESS_HEAP_ENTRY_MOVEABLE
1511 and PROCESS_HEAP_ENTRY_DDESHARE yet */
1512 }
1513
1514 entry->iRegionIndex = region_index;
1515
1516 /* first element of heap ? */
1517 if (ptr == (char *)(currentheap + currentheap->headerSize))
1518 {
1519 entry->wFlags |= PROCESS_HEAP_REGION;
1520 entry->Foo.Region.dwCommittedSize = currentheap->commitSize;
1521 entry->Foo.Region.dwUnCommittedSize =
1522 currentheap->size - currentheap->commitSize;
1523 entry->Foo.Region.lpFirstBlock = /* first valid block */
1524 currentheap + currentheap->headerSize;
1525 entry->Foo.Region.lpLastBlock = /* first invalid block */
1526 currentheap + currentheap->size;
1527 }
1528 ret = TRUE;
1529
1530 HW_end:
1531 if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap );
1532
1533 return ret;
1534 }
1535
1536
1537 /***********************************************************************
1538 * HEAP_CreateSystemHeap
1539 *
1540 * Create the system heap.
1541 */
1542 BOOL HEAP_CreateSystemHeap(void)
1543 {
1544 SYSTEM_HEAP_DESCR *descr;
1545 HANDLE heap;
1546 HEAP *heapPtr;
1547 int created;
1548
1549 HANDLE map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
1550 0, HEAP_DEF_SIZE, "__SystemHeap" );
1551 if (!map) return FALSE;
1552 created = (GetLastError() != ERROR_ALREADY_EXISTS);
1553
1554 if (!(heapPtr = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
1555 {
1556 /* pre-defined address not available, use any one */
1557 fprintf( stderr, "Warning: system heap base address %p not available\n",
1558 SYSTEM_HEAP_BASE );
1559 if (!(heapPtr = MapViewOfFile( map, FILE_MAP_ALL_ACCESS, 0, 0, 0 )))
1560 {
1561 CloseHandle( map );
1562 return FALSE;
1563 }
1564 }
1565 heap = (HANDLE)heapPtr;
1566
1567 if (created) /* newly created heap */
1568 {
1569 HEAP_InitSubHeap( heapPtr, heapPtr, HEAP_WINE_SHARED, 0, HEAP_DEF_SIZE );
1570 HeapLock( heap );
1571 descr = heapPtr->private = HeapAlloc( heap, HEAP_ZERO_MEMORY, sizeof(*descr) );
1572 assert( descr );
1573 }
1574 else
1575 {
1576 /* wait for the heap to be initialized */
1577 while (!heapPtr->private) Sleep(1);
1578 HeapLock( heap );
1579 /* remap it to the right address if necessary */
1580 if (heapPtr->subheap.heap != heapPtr)
1581 {
1582 void *base = heapPtr->subheap.heap;
1583 HeapUnlock( heap );
1584 UnmapViewOfFile( heapPtr );
1585 if (!(heapPtr = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, base )))
1586 {
1587 fprintf( stderr, "Couldn't map system heap at the correct address (%p)\n", base );
1588 CloseHandle( map );
1589 return FALSE;
1590 }
1591 heap = (HANDLE)heapPtr;
1592 HeapLock( heap );
1593 }
1594 descr = heapPtr->private;
1595 assert( descr );
1596 }
1597 SystemHeap = heap;
1598 SystemHeapDescr = descr;
1599 HeapUnlock( heap );
1600 CloseHandle( map );
1601 return TRUE;
1602 }
1603
1604
1605 /***********************************************************************
1606 * GetProcessHeap (KERNEL32.259)
1607 */
1608 HANDLE WINAPI GetProcessHeap(void)
1609 {
1610 return (HANDLE)processHeap;
1611 }
1612
1613
1614 /***********************************************************************
1615 * GetProcessHeaps (KERNEL32.376)
1616 */
1617 DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps )
1618 {
1619 DWORD total;
1620 HEAP *ptr;
1621
1622 if (!processHeap) return 0; /* should never happen */
1623 total = 1; /* main heap */
1624 EnterCriticalSection( &processHeap->critSection );
1625 for (ptr = firstHeap; ptr; ptr = ptr->next) total++;
1626 if (total <= count)
1627 {
1628 *heaps++ = (HANDLE)processHeap;
1629 for (ptr = firstHeap; ptr; ptr = ptr->next) *heaps++ = (HANDLE)ptr;
1630 }
1631 LeaveCriticalSection( &processHeap->critSection );
1632 return total;
1633 }
1634
1635
1636 /***********************************************************************
1637 * HEAP_xalloc
1638 *
1639 * Same as HeapAlloc(), but die on failure.
1640 */
1641 LPVOID HEAP_xalloc( HANDLE heap, DWORD flags, DWORD size )
1642 {
1643 LPVOID p = HeapAlloc( heap, flags, size );
1644 if (!p)
1645 {
1646 MESSAGE("Virtual memory exhausted.\n" );
1647 exit(1);
1648 }
1649 SET_EIP(p);
1650 return p;
1651 }
1652
1653
1654 /***********************************************************************
1655 * HEAP_strdupA
1656 */
1657 LPSTR HEAP_strdupA( HANDLE heap, DWORD flags, LPCSTR str )
1658 {
1659 LPSTR p = HEAP_xalloc( heap, flags, strlen(str) + 1 );
1660 SET_EIP(p);
1661 strcpy( p, str );
1662 return p;
1663 }
1664
1665
1666 /***********************************************************************
1667 * HEAP_strdupW
1668 */
1669 LPWSTR HEAP_strdupW( HANDLE heap, DWORD flags, LPCWSTR str )
1670 {
1671 INT len = lstrlenW(str) + 1;
1672 LPWSTR p = HEAP_xalloc( heap, flags, len * sizeof(WCHAR) );
1673 SET_EIP(p);
1674 lstrcpyW( p, str );
1675 return p;
1676 }
1677
1678
1679 /***********************************************************************
1680 * HEAP_strdupAtoW
1681 */
1682 LPWSTR HEAP_strdupAtoW( HANDLE heap, DWORD flags, LPCSTR str )
1683 {
1684 LPWSTR ret;
1685
1686 if (!str) return NULL;
1687 ret = HEAP_xalloc( heap, flags, (strlen(str)+1) * sizeof(WCHAR) );
1688 SET_EIP(ret);
1689 lstrcpyAtoW( ret, str );
1690 return ret;
1691 }
1692
1693
1694 /***********************************************************************
1695 * HEAP_strdupWtoA
1696 */
1697 LPSTR HEAP_strdupWtoA( HANDLE heap, DWORD flags, LPCWSTR str )
1698 {
1699 LPSTR ret;
1700
1701 if (!str) return NULL;
1702 ret = HEAP_xalloc( heap, flags, lstrlenW(str) + 1 );
1703 SET_EIP(ret);
1704 lstrcpyWtoA( ret, str );
1705 return ret;
1706 }
1707
1708
1709
1710 /***********************************************************************
1711 * 32-bit local heap functions (Win95; undocumented)
1712 */
1713
1714 #define HTABLE_SIZE 0x10000
1715 #define HTABLE_PAGESIZE 0x1000
1716 #define HTABLE_NPAGES (HTABLE_SIZE / HTABLE_PAGESIZE)
1717
1718 #include "pshpack1.h"
1719 typedef struct _LOCAL32HEADER
1720 {
1721 WORD freeListFirst[HTABLE_NPAGES];
1722 WORD freeListSize[HTABLE_NPAGES];
1723 WORD freeListLast[HTABLE_NPAGES];
1724
1725 DWORD selectorTableOffset;
1726 WORD selectorTableSize;
1727 WORD selectorDelta;
1728
1729 DWORD segment;
1730 LPBYTE base;
1731
1732 DWORD limit;
1733 DWORD flags;
1734
1735 DWORD magic;
1736 HANDLE heap;
1737
1738 } LOCAL32HEADER;
1739 #include "poppack.h"
1740
1741 #define LOCAL32_MAGIC ((DWORD)('L' | ('H'<<8) | ('3'<<16) | ('2'<<24)))
1742
1743 /***********************************************************************
1744 * Local32Init (KERNEL.208)
1745 */
1746 HANDLE WINAPI Local32Init16( WORD segment, DWORD tableSize,
1747 DWORD heapSize, DWORD flags )
1748 {
1749 DWORD totSize, segSize = 0;
1750 LPBYTE base;
1751 LOCAL32HEADER *header;
1752 HEAP *heap;
1753 WORD *selectorTable;
1754 WORD selectorEven, selectorOdd;
1755 int i, nrBlocks;
1756
1757 /* Determine new heap size */
1758
1759 if ( segment )
1760 {
1761 if ( (segSize = GetSelectorLimit16( segment )) == 0 )
1762 return 0;
1763 else
1764 segSize++;
1765 }
1766
1767 if ( heapSize == -1L )
1768 heapSize = 1024L*1024L; /* FIXME */
1769
1770 heapSize = (heapSize + 0xffff) & 0xffff0000;
1771 segSize = (segSize + 0x0fff) & 0xfffff000;
1772 totSize = segSize + HTABLE_SIZE + heapSize;
1773
1774
1775 /* Allocate memory and initialize heap */
1776
1777 if ( !(base = VirtualAlloc( NULL, totSize, MEM_RESERVE, PAGE_READWRITE )) )
1778 return 0;
1779
1780 if ( !VirtualAlloc( base, segSize + HTABLE_PAGESIZE,
1781 MEM_COMMIT, PAGE_READWRITE ) )
1782 {
1783 VirtualFree( base, 0, MEM_RELEASE );
1784 return 0;
1785 }
1786
1787 heap = (HEAP *)(base + segSize + HTABLE_SIZE);
1788 if ( !HEAP_InitSubHeap( heap, (LPVOID)heap, 0, 0x10000, heapSize ) )
1789 {
1790 VirtualFree( base, 0, MEM_RELEASE );
1791 return 0;
1792 }
1793
1794
1795 /* Set up header and handle table */
1796
1797 header = (LOCAL32HEADER *)(base + segSize);
1798 header->base = base;
1799 header->limit = HTABLE_PAGESIZE-1;
1800 header->flags = 0;
1801 header->magic = LOCAL32_MAGIC;
1802 header->heap = (HANDLE)heap;
1803
1804 header->freeListFirst[0] = sizeof(LOCAL32HEADER);
1805 header->freeListLast[0] = HTABLE_PAGESIZE - 4;
1806 header->freeListSize[0] = (HTABLE_PAGESIZE - sizeof(LOCAL32HEADER)) / 4;
1807
1808 for (i = header->freeListFirst[0]; i < header->freeListLast[0]; i += 4)
1809 *(DWORD *)((LPBYTE)header + i) = i+4;
1810
1811 header->freeListFirst[1] = 0xffff;
1812
1813
1814 /* Set up selector table */
1815
1816 nrBlocks = (totSize + 0x7fff) >> 15;
1817 selectorTable = (LPWORD) HeapAlloc( header->heap, 0, nrBlocks * 2 );
1818 selectorEven = SELECTOR_AllocBlock( base, totSize,
1819 SEGMENT_DATA, FALSE, FALSE );
1820 selectorOdd = SELECTOR_AllocBlock( base + 0x8000, totSize - 0x8000,
1821 SEGMENT_DATA, FALSE, FALSE );
1822
1823 if ( !selectorTable || !selectorEven || !selectorOdd )
1824 {
1825 if ( selectorTable ) HeapFree( header->heap, 0, selectorTable );
1826 if ( selectorEven ) SELECTOR_FreeBlock( selectorEven, totSize >> 16 );
1827 if ( selectorOdd ) SELECTOR_FreeBlock( selectorOdd, (totSize-0x8000) >> 16 );
1828 HeapDestroy( header->heap );
1829 VirtualFree( base, 0, MEM_RELEASE );
1830 return 0;
1831 }
1832
1833 header->selectorTableOffset = (LPBYTE)selectorTable - header->base;
1834 header->selectorTableSize = nrBlocks * 4; /* ??? Win95 does it this way! */
1835 header->selectorDelta = selectorEven - selectorOdd;
1836 header->segment = segment? segment : selectorEven;
1837
1838 for (i = 0; i < nrBlocks; i++)
1839 selectorTable[i] = (i & 1)? selectorOdd + ((i >> 1) << __AHSHIFT)
1840 : selectorEven + ((i >> 1) << __AHSHIFT);
1841
1842 /* Move old segment */
1843
1844 if ( segment )
1845 {
1846 /* FIXME: This is somewhat ugly and relies on implementation
1847 details about 16-bit global memory handles ... */
1848
1849 LPBYTE oldBase = (LPBYTE)GetSelectorBase( segment );
1850 memcpy( base, oldBase, segSize );
1851 GLOBAL_MoveBlock( segment, base, totSize );
1852 HeapFree( SystemHeap, 0, oldBase );
1853 }
1854
1855 return (HANDLE)header;
1856 }
1857
1858 /***********************************************************************
1859 * Local32_SearchHandle
1860 */
1861 static LPDWORD Local32_SearchHandle( LOCAL32HEADER *header, DWORD addr )
1862 {
1863 LPDWORD handle;
1864
1865 for ( handle = (LPDWORD)((LPBYTE)header + sizeof(LOCAL32HEADER));
1866 handle < (LPDWORD)((LPBYTE)header + header->limit);
1867 handle++)
1868 {
1869 if (*handle == addr)
1870 return handle;
1871 }
1872
1873 return NULL;
1874 }
1875
1876 /***********************************************************************
1877 * Local32_ToHandle
1878 */
1879 static VOID Local32_ToHandle( LOCAL32HEADER *header, INT16 type,
1880 DWORD addr, LPDWORD *handle, LPBYTE *ptr )
1881 {
1882 *handle = NULL;
1883 *ptr = NULL;
1884
1885 switch (type)
1886 {
1887 case -2: /* 16:16 pointer, no handles */
1888 *ptr = PTR_SEG_TO_LIN( addr );
1889 *handle = (LPDWORD)*ptr;
1890 break;
1891
1892 case -1: /* 32-bit offset, no handles */
1893 *ptr = header->base + addr;
1894 *handle = (LPDWORD)*ptr;
1895 break;
1896
1897 case 0: /* handle */
1898 if ( addr >= sizeof(LOCAL32HEADER)
1899 && addr < header->limit && !(addr & 3)
1900 && *(LPDWORD)((LPBYTE)header + addr) >= HTABLE_SIZE )
1901 {
1902 *handle = (LPDWORD)((LPBYTE)header + addr);
1903 *ptr = header->base + **handle;
1904 }
1905 break;
1906
1907 case 1: /* 16:16 pointer */
1908 *ptr = PTR_SEG_TO_LIN( addr );
1909 *handle = Local32_SearchHandle( header, *ptr - header->base );
1910 break;
1911
1912 case 2: /* 32-bit offset */
1913 *ptr = header->base + addr;
1914 *handle = Local32_SearchHandle( header, *ptr - header->base );
1915 break;
1916 }
1917 }
1918
1919 /***********************************************************************
1920 * Local32_FromHandle
1921 */
1922 static VOID Local32_FromHandle( LOCAL32HEADER *header, INT16 type,
1923 DWORD *addr, LPDWORD handle, LPBYTE ptr )
1924 {
1925 switch (type)
1926 {
1927 case -2: /* 16:16 pointer */
1928 case 1:
1929 {
1930 WORD *selTable = (LPWORD)(header->base + header->selectorTableOffset);
1931 DWORD offset = (LPBYTE)ptr - header->base;
1932 *addr = MAKELONG( offset & 0x7fff, selTable[offset >> 15] );
1933 }
1934 break;
1935
1936 case -1: /* 32-bit offset */
1937 case 2:
1938 *addr = ptr - header->base;
1939 break;
1940
1941 case 0: /* handle */
1942 *addr = (LPBYTE)handle - (LPBYTE)header;
1943 break;
1944 }
1945 }
1946
1947 /***********************************************************************
1948 * Local32Alloc (KERNEL.209)
1949 */
1950 DWORD WINAPI Local32Alloc16( HANDLE heap, DWORD size, INT16 type, DWORD flags )
1951 {
1952 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
1953 LPDWORD handle;
1954 LPBYTE ptr;
1955 DWORD addr;
1956
1957 /* Allocate memory */
1958 ptr = HeapAlloc( header->heap,
1959 (flags & LMEM_MOVEABLE)? HEAP_ZERO_MEMORY : 0, size );
1960 if (!ptr) return 0;
1961
1962
1963 /* Allocate handle if requested */
1964 if (type >= 0)
1965 {
1966 int page, i;
1967
1968 /* Find first page of handle table with free slots */
1969 for (page = 0; page < HTABLE_NPAGES; page++)
1970 if (header->freeListFirst[page] != 0)
1971 break;
1972 if (page == HTABLE_NPAGES)
1973 {
1974 WARN("Out of handles!\n" );
1975 HeapFree( header->heap, 0, ptr );
1976 return 0;
1977 }
1978
1979 /* If virgin page, initialize it */
1980 if (header->freeListFirst[page] == 0xffff)
1981 {
1982 if ( !VirtualAlloc( (LPBYTE)header + (page << 12),
1983 0x1000, MEM_COMMIT, PAGE_READWRITE ) )
1984 {
1985 WARN("Cannot grow handle table!\n" );
1986 HeapFree( header->heap, 0, ptr );
1987 return 0;
1988 }
1989
1990 header->limit += HTABLE_PAGESIZE;
1991
1992 header->freeListFirst[page] = 0;
1993 header->freeListLast[page] = HTABLE_PAGESIZE - 4;
1994 header->freeListSize[page] = HTABLE_PAGESIZE / 4;
1995
1996 for (i = 0; i < HTABLE_PAGESIZE; i += 4)
1997 *(DWORD *)((LPBYTE)header + i) = i+4;
1998
1999 if (page < HTABLE_NPAGES-1)
2000 header->freeListFirst[page+1] = 0xffff;
2001 }
2002
2003 /* Allocate handle slot from page */
2004 handle = (LPDWORD)((LPBYTE)header + header->freeListFirst[page]);
2005 if (--header->freeListSize[page] == 0)
2006 header->freeListFirst[page] = header->freeListLast[page] = 0;
2007 else
2008 header->freeListFirst[page] = *handle;
2009
2010 /* Store 32-bit offset in handle slot */
2011 *handle = ptr - header->base;
2012 }
2013 else
2014 {
2015 handle = (LPDWORD)ptr;
2016 header->flags |= 1;
2017 }
2018
2019
2020 /* Convert handle to requested output type */
2021 Local32_FromHandle( header, type, &addr, handle, ptr );
2022 return addr;
2023 }
2024
2025 /***********************************************************************
2026 * Local32ReAlloc (KERNEL.210)
2027 */
2028 DWORD WINAPI Local32ReAlloc16( HANDLE heap, DWORD addr, INT16 type,
2029 DWORD size, DWORD flags )
2030 {
2031 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2032 LPDWORD handle;
2033 LPBYTE ptr;
2034
2035 if (!addr)
2036 return Local32Alloc16( heap, size, type, flags );
2037
2038 /* Retrieve handle and pointer */
2039 Local32_ToHandle( header, type, addr, &handle, &ptr );
2040 if (!handle) return FALSE;
2041
2042 /* Reallocate memory block */
2043 ptr = HeapReAlloc( header->heap,
2044 (flags & LMEM_MOVEABLE)? HEAP_ZERO_MEMORY : 0,
2045 ptr, size );
2046 if (!ptr) return 0;
2047
2048 /* Modify handle */
2049 if (type >= 0)
2050 *handle = ptr - header->base;
2051 else
2052 handle = (LPDWORD)ptr;
2053
2054 /* Convert handle to requested output type */
2055 Local32_FromHandle( header, type, &addr, handle, ptr );
2056 return addr;
2057 }
2058
2059 /***********************************************************************
2060 * Local32Free (KERNEL.211)
2061 */
2062 BOOL WINAPI Local32Free16( HANDLE heap, DWORD addr, INT16 type )
2063 {
2064 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2065 LPDWORD handle;
2066 LPBYTE ptr;
2067
2068 /* Retrieve handle and pointer */
2069 Local32_ToHandle( header, type, addr, &handle, &ptr );
2070 if (!handle) return FALSE;
2071
2072 /* Free handle if necessary */
2073 if (type >= 0)
2074 {
2075 int offset = (LPBYTE)handle - (LPBYTE)header;
2076 int page = offset >> 12;
2077
2078 /* Return handle slot to page free list */
2079 if (header->freeListSize[page]++ == 0)
2080 header->freeListFirst[page] = header->freeListLast[page] = offset;
2081 else
2082 *(LPDWORD)((LPBYTE)header + header->freeListLast[page]) = offset,
2083 header->freeListLast[page] = offset;
2084
2085 *handle = 0;
2086
2087 /* Shrink handle table when possible */
2088 while (page > 0 && header->freeListSize[page] == HTABLE_PAGESIZE / 4)
2089 {
2090 if ( VirtualFree( (LPBYTE)header +
2091 (header->limit & ~(HTABLE_PAGESIZE-1)),
2092 HTABLE_PAGESIZE, MEM_DECOMMIT ) )
2093 break;
2094
2095 header->limit -= HTABLE_PAGESIZE;
2096 header->freeListFirst[page] = 0xffff;
2097 page--;
2098 }
2099 }
2100
2101 /* Free memory */
2102 return HeapFree( header->heap, 0, ptr );
2103 }
2104
2105 /***********************************************************************
2106 * Local32Translate (KERNEL.213)
2107 */
2108 DWORD WINAPI Local32Translate16( HANDLE heap, DWORD addr, INT16 type1, INT16 type2 )
2109 {
2110 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2111 LPDWORD handle;
2112 LPBYTE ptr;
2113
2114 Local32_ToHandle( header, type1, addr, &handle, &ptr );
2115 if (!handle) return 0;
2116
2117 Local32_FromHandle( header, type2, &addr, handle, ptr );
2118 return addr;
2119 }
2120
2121 /***********************************************************************
2122 * Local32Size (KERNEL.214)
2123 */
2124 DWORD WINAPI Local32Size16( HANDLE heap, DWORD addr, INT16 type )
2125 {
2126 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2127 LPDWORD handle;
2128 LPBYTE ptr;
2129
2130 Local32_ToHandle( header, type, addr, &handle, &ptr );
2131 if (!handle) return 0;
2132
2133 return HeapSize( header->heap, 0, ptr );
2134 }
2135
2136 /***********************************************************************
2137 * Local32ValidHandle (KERNEL.215)
2138 */
2139 BOOL WINAPI Local32ValidHandle16( HANDLE heap, WORD addr )
2140 {
2141 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2142 LPDWORD handle;
2143 LPBYTE ptr;
2144
2145 Local32_ToHandle( header, 0, addr, &handle, &ptr );
2146 return handle != NULL;
2147 }
2148
2149 /***********************************************************************
2150 * Local32GetSegment (KERNEL.229)
2151 */
2152 WORD WINAPI Local32GetSegment16( HANDLE heap )
2153 {
2154 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2155 return header->segment;
2156 }
2157
2158 /***********************************************************************
2159 * Local32_GetHeap
2160 */
2161 static LOCAL32HEADER *Local32_GetHeap( HGLOBAL16 handle )
2162 {
2163 WORD selector = GlobalHandleToSel16( handle );
2164 DWORD base = GetSelectorBase( selector );
2165 DWORD limit = GetSelectorLimit16( selector );
2166
2167 /* Hmmm. This is a somewhat stupid heuristic, but Windows 95 does
2168 it this way ... */
2169
2170 if ( limit > 0x10000 && ((LOCAL32HEADER *)base)->magic == LOCAL32_MAGIC )
2171 return (LOCAL32HEADER *)base;
2172
2173 base += 0x10000;
2174 limit -= 0x10000;
2175
2176 if ( limit > 0x10000 && ((LOCAL32HEADER *)base)->magic == LOCAL32_MAGIC )
2177 return (LOCAL32HEADER *)base;
2178
2179 return NULL;
2180 }
2181
2182 /***********************************************************************
2183 * Local32Info (KERNEL.444) (TOOLHELP.84)
2184 */
2185 BOOL16 WINAPI Local32Info16( LOCAL32INFO *pLocal32Info, HGLOBAL16 handle )
2186 {
2187 SUBHEAP *heapPtr;
2188 LPBYTE ptr;
2189 int i;
2190
2191 LOCAL32HEADER *header = Local32_GetHeap( handle );
2192 if ( !header ) return FALSE;
2193
2194 if ( !pLocal32Info || pLocal32Info->dwSize < sizeof(LOCAL32INFO) )
2195 return FALSE;
2196
2197 heapPtr = (SUBHEAP *)HEAP_GetPtr( header->heap );
2198 pLocal32Info->dwMemReserved = heapPtr->size;
2199 pLocal32Info->dwMemCommitted = heapPtr->commitSize;
2200 pLocal32Info->dwTotalFree = 0L;
2201 pLocal32Info->dwLargestFreeBlock = 0L;
2202
2203 /* Note: Local32 heaps always have only one subheap! */
2204 ptr = (LPBYTE)heapPtr + heapPtr->headerSize;
2205 while ( ptr < (LPBYTE)heapPtr + heapPtr->size )
2206 {
2207 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
2208 {
2209 ARENA_FREE *pArena = (ARENA_FREE *)ptr;
2210 DWORD size = (pArena->size & ARENA_SIZE_MASK);
2211 ptr += sizeof(*pArena) + size;
2212
2213 pLocal32Info->dwTotalFree += size;
2214 if ( size > pLocal32Info->dwLargestFreeBlock )
2215 pLocal32Info->dwLargestFreeBlock = size;
2216 }
2217 else
2218 {
2219 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
2220 DWORD size = (pArena->size & ARENA_SIZE_MASK);
2221 ptr += sizeof(*pArena) + size;
2222 }
2223 }
2224
2225 pLocal32Info->dwcFreeHandles = 0;
2226 for ( i = 0; i < HTABLE_NPAGES; i++ )
2227 {
2228 if ( header->freeListFirst[i] == 0xffff ) break;
2229 pLocal32Info->dwcFreeHandles += header->freeListSize[i];
2230 }
2231 pLocal32Info->dwcFreeHandles += (HTABLE_NPAGES - i) * HTABLE_PAGESIZE/4;
2232
2233 return TRUE;
2234 }
2235
2236 /***********************************************************************
2237 * Local32First (KERNEL.445) (TOOLHELP.85)
2238 */
2239 BOOL16 WINAPI Local32First16( LOCAL32ENTRY *pLocal32Entry, HGLOBAL16 handle )
2240 {
2241 FIXME("(%p, %04X): stub!\n", pLocal32Entry, handle );
2242 return FALSE;
2243 }
2244
2245 /***********************************************************************
2246 * Local32Next (KERNEL.446) (TOOLHELP.86)
2247 */
2248 BOOL16 WINAPI Local32Next16( LOCAL32ENTRY *pLocal32Entry )
2249 {
2250 FIXME("(%p): stub!\n", pLocal32Entry );
2251 return FALSE;
2252 }
2253
Windows API implementation