2 * 16-bit local heap functions
4 * Copyright 1995 Alexandre Julliard
5 * Copyright 1996 Huw Davies
6 * Copyright 1998 Ulrich Weigand
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 * All local heap functions need the current DS as first parameter
26 * when called from the emulation library, so they take one more
27 * parameter than usual.
32 #define NONAMELESSUNION
33 #define NONAMELESSSTRUCT
36 #include "wine/winbase16.h"
39 #include "kernel_private.h"
40 #include "kernel16_private.h"
41 #include "wine/debug.h"
43 WINE_DEFAULT_DEBUG_CHANNEL(local);
48 WORD prev; /* Previous arena | arena type */
49 WORD next; /* Next arena */
50 /* Start of the memory block or free-list info */
51 WORD size; /* Size of the free block */
52 WORD free_prev; /* Previous free block */
53 WORD free_next; /* Next free block */
56 #define ARENA_HEADER_SIZE 4
57 #define ARENA_HEADER( handle) ((handle) - ARENA_HEADER_SIZE)
59 /* Arena types (stored in 'prev' field of the arena) */
60 #define LOCAL_ARENA_FREE 0
61 #define LOCAL_ARENA_FIXED 1
63 /* LocalNotify() msgs */
69 /* Layout of a handle entry table
71 * WORD count of entries
72 * LOCALHANDLEENTRY[count] entries
73 * WORD near ptr to next table
77 WORD addr; /* Address of the MOVEABLE block */
78 BYTE flags; /* Flags for this block */
79 BYTE lock; /* Lock count */
83 * We make addr = 4n + 2 and set *((WORD *)addr - 1) = &addr like Windows does
84 * in case something actually relies on this.
85 * Note that if the architecture does not allow unaligned accesses, we make
86 * addr = 4n + 4 to avoid returning unaligned pointers from LocalAlloc etc.
88 * An unused handle has lock = flags = 0xff. In windows addr is that of next
89 * free handle, at the moment in wine we set it to 0.
91 * A discarded block's handle has lock = addr = 0 and flags = 0x40
92 * (LMEM_DISCARDED >> 8)
95 #ifdef ALLOW_UNALIGNED_ACCESS
96 # define MOVEABLE_PREFIX sizeof(HLOCAL16)
98 # define MOVEABLE_PREFIX sizeof(int)
102 #include "pshpack1.h"
106 WORD check; /* 00 Heap checking flag */
107 WORD freeze; /* 02 Heap frozen flag */
108 WORD items; /* 04 Count of items on the heap */
109 WORD first; /* 06 First item of the heap */
110 WORD pad1; /* 08 Always 0 */
111 WORD last; /* 0a Last item of the heap */
112 WORD pad2; /* 0c Always 0 */
113 BYTE ncompact; /* 0e Compactions counter */
114 BYTE dislevel; /* 0f Discard level */
115 DWORD distotal; /* 10 Total bytes discarded */
116 WORD htable; /* 14 Pointer to handle table */
117 WORD hfree; /* 16 Pointer to free handle table */
118 WORD hdelta; /* 18 Delta to expand the handle table */
119 WORD expand; /* 1a Pointer to expand function (unused) */
120 WORD pstat; /* 1c Pointer to status structure (unused) */
121 FARPROC16 notify; /* 1e Pointer to LocalNotify() function */
122 WORD lock; /* 22 Lock count for the heap */
123 WORD extra; /* 24 Extra bytes to allocate when expanding */
124 WORD minsize; /* 26 Minimum size of the heap */
125 WORD magic; /* 28 Magic number */
130 #define LOCAL_HEAP_MAGIC 0x484c /* 'LH' */
132 /* All local heap allocations are aligned on 4-byte boundaries */
133 #define LALIGN(word) (((word) + 3) & ~3)
135 #define ARENA_PTR(ptr,arena) ((LOCALARENA *)((char*)(ptr)+(arena)))
136 #define ARENA_PREV(ptr,arena) (ARENA_PTR((ptr),(arena))->prev & ~3)
137 #define ARENA_NEXT(ptr,arena) (ARENA_PTR((ptr),(arena))->next)
138 #define ARENA_FLAGS(ptr,arena) (ARENA_PTR((ptr),(arena))->prev & 3)
140 /* determine whether the handle belongs to a fixed or a moveable block */
141 #define HANDLE_FIXED(handle) (((handle) & 3) == 0)
142 #define HANDLE_MOVEABLE(handle) (((handle) & 3) == 2)
145 /* 32-bit heap definitions */
147 #define HTABLE_SIZE 0x10000
148 #define HTABLE_PAGESIZE 0x1000
149 #define HTABLE_NPAGES (HTABLE_SIZE / HTABLE_PAGESIZE)
151 #include "pshpack1.h"
152 typedef struct _LOCAL32HEADER
154 WORD freeListFirst[HTABLE_NPAGES];
155 WORD freeListSize[HTABLE_NPAGES];
156 WORD freeListLast[HTABLE_NPAGES];
158 DWORD selectorTableOffset;
159 WORD selectorTableSize;
174 #define LOCAL32_MAGIC ((DWORD)('L' | ('H'<<8) | ('3'<<16) | ('2'<<24)))
177 static inline BOOL16 call_notify_func( FARPROC16 proc, WORD msg, HLOCAL16 handle, WORD arg )
182 if (!proc) return FALSE;
186 WOWCallback16Ex( (DWORD)proc, WCB16_PASCAL, sizeof(args), args, &ret );
191 /***********************************************************************
194 * Return a pointer to the local heap, making sure it exists.
196 static LOCALHEAPINFO *LOCAL_GetHeap( HANDLE16 ds )
198 LOCALHEAPINFO *pInfo;
199 INSTANCEDATA *ptr = MapSL( MAKESEGPTR( ds, 0 ));
200 TRACE("Heap at %p, %04x\n", ptr, (ptr != NULL ? ptr->heap : 0xFFFF));
201 if (!ptr || !ptr->heap) return NULL;
202 if (IsBadReadPtr16( (SEGPTR)MAKELONG(ptr->heap,ds), sizeof(LOCALHEAPINFO)))
204 WARN("Bad pointer\n");
207 pInfo = (LOCALHEAPINFO*)((char*)ptr + ptr->heap);
208 if (pInfo->magic != LOCAL_HEAP_MAGIC)
217 /***********************************************************************
218 * LOCAL_MakeBlockFree
220 * Make a block free, inserting it in the free-list.
221 * 'block' is the handle of the block arena; 'baseptr' points to
222 * the beginning of the data segment containing the heap.
224 static void LOCAL_MakeBlockFree( char *baseptr, WORD block )
226 LOCALARENA *pArena, *pNext;
229 /* Mark the block as free */
231 pArena = ARENA_PTR( baseptr, block );
232 pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FREE;
233 pArena->size = pArena->next - block;
235 /* Find the next free block (last block is always free) */
240 pNext = ARENA_PTR( baseptr, next );
241 if ((pNext->prev & 3) == LOCAL_ARENA_FREE) break;
245 TRACE("%04x, next %04x\n", block, next );
246 /* Insert the free block in the free-list */
248 pArena->free_prev = pNext->free_prev;
249 pArena->free_next = next;
250 ARENA_PTR(baseptr,pNext->free_prev)->free_next = block;
251 pNext->free_prev = block;
255 /***********************************************************************
256 * LOCAL_RemoveFreeBlock
258 * Remove a block from the free-list.
259 * 'block' is the handle of the block arena; 'baseptr' points to
260 * the beginning of the data segment containing the heap.
262 static void LOCAL_RemoveFreeBlock( char *baseptr, WORD block )
264 /* Mark the block as fixed */
266 LOCALARENA *pArena = ARENA_PTR( baseptr, block );
267 pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FIXED;
269 /* Remove it from the list */
271 ARENA_PTR(baseptr,pArena->free_prev)->free_next = pArena->free_next;
272 ARENA_PTR(baseptr,pArena->free_next)->free_prev = pArena->free_prev;
276 /***********************************************************************
279 * Insert a new block in the heap.
280 * 'new' is the handle of the new block arena; 'baseptr' points to
281 * the beginning of the data segment containing the heap; 'prev' is
282 * the block before the new one.
284 static void LOCAL_AddBlock( char *baseptr, WORD prev, WORD new )
286 LOCALARENA *pPrev = ARENA_PTR( baseptr, prev );
287 LOCALARENA *pNew = ARENA_PTR( baseptr, new );
289 pNew->prev = (prev & ~3) | LOCAL_ARENA_FIXED;
290 pNew->next = pPrev->next;
291 ARENA_PTR(baseptr,pPrev->next)->prev &= 3;
292 ARENA_PTR(baseptr,pPrev->next)->prev |= new;
297 /***********************************************************************
300 * Remove a block from the heap.
301 * 'block' is the handle of the block arena; 'baseptr' points to
302 * the beginning of the data segment containing the heap.
304 static void LOCAL_RemoveBlock( char *baseptr, WORD block )
306 LOCALARENA *pArena, *pTmp;
308 /* Remove the block from the free-list */
311 pArena = ARENA_PTR( baseptr, block );
312 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
313 LOCAL_RemoveFreeBlock( baseptr, block );
315 /* If the previous block is free, expand its size */
317 pTmp = ARENA_PTR( baseptr, pArena->prev & ~3 );
318 if ((pTmp->prev & 3) == LOCAL_ARENA_FREE)
319 pTmp->size += pArena->next - block;
321 /* Remove the block from the linked list */
323 pTmp->next = pArena->next;
324 pTmp = ARENA_PTR( baseptr, pArena->next );
325 pTmp->prev = (pTmp->prev & 3) | (pArena->prev & ~3);
329 /***********************************************************************
332 static void LOCAL_PrintHeap( HANDLE16 ds )
335 LOCALHEAPINFO *pInfo;
338 /* FIXME - the test should be done when calling the function!
339 plus is not clear that we should print this info
340 only when TRACE_ON is on! */
341 if(!TRACE_ON(local)) return;
343 ptr = MapSL( MAKESEGPTR( ds, 0 ));
344 pInfo = LOCAL_GetHeap( ds );
348 DPRINTF( "Local Heap corrupted! ds=%04x\n", ds );
351 DPRINTF( "Local Heap ds=%04x first=%04x last=%04x items=%d\n",
352 ds, pInfo->first, pInfo->last, pInfo->items );
354 arena = pInfo->first;
357 LOCALARENA *pArena = ARENA_PTR(ptr,arena);
358 DPRINTF( " %04x: prev=%04x next=%04x type=%d\n", arena,
359 pArena->prev & ~3, pArena->next, pArena->prev & 3 );
360 if (arena == pInfo->first)
362 DPRINTF( " size=%d free_prev=%04x free_next=%04x\n",
363 pArena->size, pArena->free_prev, pArena->free_next );
365 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
367 DPRINTF( " size=%d free_prev=%04x free_next=%04x\n",
368 pArena->size, pArena->free_prev, pArena->free_next );
369 if (pArena->next == arena) break; /* last one */
370 if (ARENA_PTR(ptr,pArena->free_next)->free_prev != arena)
372 DPRINTF( "*** arena->free_next->free_prev != arena\n" );
376 if (pArena->next == arena)
378 DPRINTF( "*** last block is not marked free\n" );
381 if ((ARENA_PTR(ptr,pArena->next)->prev & ~3) != arena)
383 DPRINTF( "*** arena->next->prev != arena (%04x, %04x)\n",
384 pArena->next, ARENA_PTR(ptr,pArena->next)->prev);
387 arena = pArena->next;
392 /***********************************************************************
393 * LocalInit (KERNEL.4)
395 BOOL16 WINAPI LocalInit16( HANDLE16 selector, WORD start, WORD end )
398 WORD heapInfoArena, freeArena, lastArena;
399 LOCALHEAPINFO *pHeapInfo;
400 LOCALARENA *pArena, *pFirstArena, *pLastArena;
403 /* The initial layout of the heap is: */
404 /* - first arena (FIXED) */
405 /* - heap info structure (FIXED) */
406 /* - large free block (FREE) */
407 /* - last arena (FREE) */
409 TRACE("%04x %04x-%04x\n", selector, start, end);
410 if (!selector) selector = CURRENT_DS;
414 /* If TRACE_ON(heap) is set, the global heap blocks are */
415 /* cleared before use, so we can test for double initialization. */
416 if (LOCAL_GetHeap(selector))
418 ERR("Heap %04x initialized twice.\n", selector);
419 LOCAL_PrintHeap(selector);
425 /* start == 0 means: put the local heap at the end of the segment */
427 DWORD size = GlobalSize16( GlobalHandle16( selector ) );
428 start = (WORD)(size > 0xffff ? 0xffff : size) - 1;
429 if ( end > 0xfffe ) end = 0xfffe;
433 ptr = MapSL( MAKESEGPTR( selector, 0 ) );
435 start = LALIGN( max( start, sizeof(INSTANCEDATA) ) );
436 heapInfoArena = LALIGN(start + sizeof(LOCALARENA) );
437 freeArena = LALIGN( heapInfoArena + ARENA_HEADER_SIZE
438 + sizeof(LOCALHEAPINFO) );
439 lastArena = (end - sizeof(LOCALARENA)) & ~3;
441 /* Make sure there's enough space. */
443 if (freeArena + sizeof(LOCALARENA) >= lastArena) goto done;
445 /* Initialise the first arena */
447 pFirstArena = ARENA_PTR( ptr, start );
448 pFirstArena->prev = start | LOCAL_ARENA_FIXED;
449 pFirstArena->next = heapInfoArena;
450 pFirstArena->size = LALIGN(sizeof(LOCALARENA));
451 pFirstArena->free_prev = start; /* this one */
452 pFirstArena->free_next = freeArena;
454 /* Initialise the arena of the heap info structure */
456 pArena = ARENA_PTR( ptr, heapInfoArena );
457 pArena->prev = start | LOCAL_ARENA_FIXED;
458 pArena->next = freeArena;
460 /* Initialise the heap info structure */
462 pHeapInfo = (LOCALHEAPINFO *) (ptr + heapInfoArena + ARENA_HEADER_SIZE );
463 memset( pHeapInfo, 0, sizeof(LOCALHEAPINFO) );
464 pHeapInfo->items = 4;
465 pHeapInfo->first = start;
466 pHeapInfo->last = lastArena;
467 pHeapInfo->htable = 0;
468 pHeapInfo->hdelta = 0x20;
469 pHeapInfo->extra = 0x200;
470 pHeapInfo->minsize = lastArena - freeArena;
471 pHeapInfo->magic = LOCAL_HEAP_MAGIC;
473 /* Initialise the large free block */
475 pArena = ARENA_PTR( ptr, freeArena );
476 pArena->prev = heapInfoArena | LOCAL_ARENA_FREE;
477 pArena->next = lastArena;
478 pArena->size = lastArena - freeArena;
479 pArena->free_prev = start;
480 pArena->free_next = lastArena;
482 /* Initialise the last block */
484 pLastArena = ARENA_PTR( ptr, lastArena );
485 pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
486 pLastArena->next = lastArena; /* this one */
487 pLastArena->size = LALIGN(sizeof(LOCALARENA));
488 pLastArena->free_prev = freeArena;
489 pLastArena->free_next = lastArena; /* this one */
491 /* Store the local heap address in the instance data */
493 ((INSTANCEDATA *)ptr)->heap = heapInfoArena + ARENA_HEADER_SIZE;
494 LOCAL_PrintHeap( selector );
498 CURRENT_STACK16->ecx = ret; /* must be returned in cx too */
503 /***********************************************************************
506 static BOOL16 LOCAL_GrowHeap( HANDLE16 ds )
511 LOCALHEAPINFO *pHeapInfo;
512 WORD freeArena, lastArena;
513 LOCALARENA *pArena, *pLastArena;
516 hseg = GlobalHandle16( ds );
517 /* maybe mem allocated by Virtual*() ? */
518 if (!hseg) return FALSE;
520 oldsize = GlobalSize16( hseg );
521 /* if nothing can be gained, return */
522 if (oldsize > 0xfff0) return FALSE;
523 hseg = GlobalReAlloc16( hseg, 0x10000, GMEM_FIXED );
524 ptr = MapSL( MAKESEGPTR( ds, 0 ) );
525 pHeapInfo = LOCAL_GetHeap( ds );
526 if (pHeapInfo == NULL) {
527 ERR("Heap not found\n" );
530 end = GlobalSize16( hseg );
531 lastArena = (end - sizeof(LOCALARENA)) & ~3;
533 /* Update the HeapInfo */
535 freeArena = pHeapInfo->last;
536 pHeapInfo->last = lastArena;
537 pHeapInfo->minsize += end - oldsize;
539 /* grow the old last block */
540 pArena = ARENA_PTR( ptr, freeArena );
541 pArena->size = lastArena - freeArena;
542 pArena->next = lastArena;
543 pArena->free_next = lastArena;
545 /* Initialise the new last block */
547 pLastArena = ARENA_PTR( ptr, lastArena );
548 pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
549 pLastArena->next = lastArena; /* this one */
550 pLastArena->size = LALIGN(sizeof(LOCALARENA));
551 pLastArena->free_prev = freeArena;
552 pLastArena->free_next = lastArena; /* this one */
554 /* If block before freeArena is also free then merge them */
555 if((ARENA_PTR(ptr, (pArena->prev & ~3))->prev & 3) == LOCAL_ARENA_FREE)
557 LOCAL_RemoveBlock(ptr, freeArena);
561 TRACE("Heap expanded\n" );
562 LOCAL_PrintHeap( ds );
567 /***********************************************************************
570 static HLOCAL16 LOCAL_FreeArena( WORD ds, WORD arena )
572 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
573 LOCALHEAPINFO *pInfo;
574 LOCALARENA *pArena, *pPrev, *pNext;
576 TRACE("%04x ds=%04x\n", arena, ds );
577 if (!(pInfo = LOCAL_GetHeap( ds ))) return arena;
579 pArena = ARENA_PTR( ptr, arena );
580 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
582 /* shouldn't happen */
583 ERR("Trying to free block %04x twice!\n",
585 LOCAL_PrintHeap( ds );
589 /* Check if we can merge with the previous block */
591 pPrev = ARENA_PTR( ptr, pArena->prev & ~3 );
592 pNext = ARENA_PTR( ptr, pArena->next );
593 if ((pPrev->prev & 3) == LOCAL_ARENA_FREE)
595 arena = pArena->prev & ~3;
597 LOCAL_RemoveBlock( ptr, pPrev->next );
600 else /* Make a new free block */
602 LOCAL_MakeBlockFree( ptr, arena );
605 /* Check if we can merge with the next block */
607 if ((pArena->next == pArena->free_next) &&
608 (pArena->next != pInfo->last))
610 LOCAL_RemoveBlock( ptr, pArena->next );
617 /***********************************************************************
620 * Shrink an arena by creating a free block at its end if possible.
621 * 'size' includes the arena header, and must be aligned.
623 static void LOCAL_ShrinkArena( WORD ds, WORD arena, WORD size )
625 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
626 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
628 if (arena + size + LALIGN(sizeof(LOCALARENA)) < pArena->next)
630 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
632 LOCAL_AddBlock( ptr, arena, arena + size );
634 LOCAL_FreeArena( ds, arena + size );
639 /***********************************************************************
640 * LOCAL_GrowArenaDownward
642 * Grow an arena downward by using the previous arena (must be free).
644 static void LOCAL_GrowArenaDownward( WORD ds, WORD arena, WORD newsize )
646 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
647 LOCALHEAPINFO *pInfo;
648 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
649 WORD prevArena = pArena->prev & ~3;
650 LOCALARENA *pPrevArena = ARENA_PTR( ptr, prevArena );
654 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
655 offset = pPrevArena->size;
656 size = pArena->next - arena - ARENA_HEADER_SIZE;
657 LOCAL_RemoveFreeBlock( ptr, prevArena );
658 LOCAL_RemoveBlock( ptr, arena );
660 p = (char *)pPrevArena + ARENA_HEADER_SIZE;
661 while (offset < size)
663 memcpy( p, p + offset, offset );
667 if (size) memcpy( p, p + offset, size );
668 LOCAL_ShrinkArena( ds, prevArena, newsize );
673 /***********************************************************************
674 * LOCAL_GrowArenaUpward
676 * Grow an arena upward by using the next arena (must be free and big
677 * enough). Newsize includes the arena header and must be aligned.
679 static void LOCAL_GrowArenaUpward( WORD ds, WORD arena, WORD newsize )
681 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
682 LOCALHEAPINFO *pInfo;
683 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
684 WORD nextArena = pArena->next;
686 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
687 LOCAL_RemoveBlock( ptr, nextArena );
689 LOCAL_ShrinkArena( ds, arena, newsize );
693 /***********************************************************************
696 static WORD LOCAL_GetFreeSpace(WORD ds, WORD countdiscard)
698 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
699 LOCALHEAPINFO *pInfo;
704 if (!(pInfo = LOCAL_GetHeap( ds )))
706 ERR("Local heap not found\n" );
710 arena = pInfo->first;
711 pArena = ARENA_PTR( ptr, arena );
712 while (arena != pArena->free_next)
714 arena = pArena->free_next;
715 pArena = ARENA_PTR( ptr, arena );
716 if (pArena->size >= freespace) freespace = pArena->size;
718 /* FIXME doesn't yet calculate space that would become free if everything
719 were discarded when countdiscard == 1 */
720 if (freespace < ARENA_HEADER_SIZE) freespace = 0;
721 else freespace -= ARENA_HEADER_SIZE;
726 /***********************************************************************
729 static UINT16 LOCAL_Compact( HANDLE16 ds, UINT16 minfree, UINT16 flags )
731 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
732 LOCALHEAPINFO *pInfo;
733 LOCALARENA *pArena, *pMoveArena, *pFinalArena;
734 WORD arena, movearena, finalarena, table;
735 WORD count, movesize, size;
737 LOCALHANDLEENTRY *pEntry;
739 if (!(pInfo = LOCAL_GetHeap( ds )))
741 ERR("Local heap not found\n" );
745 TRACE("ds = %04x, minfree = %04x, flags = %04x\n",
747 freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
748 if(freespace >= minfree || (flags & LMEM_NOCOMPACT))
750 TRACE("Returning %04x.\n", freespace);
753 TRACE("Compacting heap %04x.\n", ds);
754 table = pInfo->htable;
757 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
758 for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
760 if((pEntry->lock == 0) && (pEntry->flags != (LMEM_DISCARDED >> 8)))
762 /* OK we can move this one if we want */
763 TRACE("handle %04x (block %04x) can be moved.\n",
764 (WORD)((char *)pEntry - ptr), pEntry->addr);
765 movearena = ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX);
766 pMoveArena = ARENA_PTR(ptr, movearena);
767 movesize = pMoveArena->next - movearena;
768 arena = pInfo->first;
769 pArena = ARENA_PTR(ptr, arena);
772 /* Try to find the smallest arena that will do, */
773 /* which is below us in memory */
776 arena = pArena->free_next;
777 pArena = ARENA_PTR(ptr, arena);
778 if(arena >= movearena)
780 if(arena == pArena->free_next)
782 if((pArena->size >= movesize) && (pArena->size < size))
788 if (finalarena) /* Actually got somewhere to move */
790 TRACE("Moving it to %04x.\n", finalarena);
791 pFinalArena = ARENA_PTR(ptr, finalarena);
792 size = pFinalArena->size;
793 LOCAL_RemoveFreeBlock(ptr, finalarena);
794 LOCAL_ShrinkArena( ds, finalarena, movesize );
795 /* Copy the arena to it's new location */
796 memcpy((char *)pFinalArena + ARENA_HEADER_SIZE,
797 (char *)pMoveArena + ARENA_HEADER_SIZE,
798 movesize - ARENA_HEADER_SIZE );
799 /* Free the old location */
800 LOCAL_FreeArena(ds, movearena);
801 call_notify_func(pInfo->notify, LN_MOVE,
802 (WORD)((char *)pEntry - ptr), pEntry->addr);
803 /* Update handle table entry */
804 pEntry->addr = finalarena + ARENA_HEADER_SIZE + MOVEABLE_PREFIX;
806 else if((ARENA_PTR(ptr, pMoveArena->prev & ~3)->prev & 3)
809 /* Previous arena is free (but < movesize) */
810 /* so we can 'slide' movearena down into it */
811 finalarena = pMoveArena->prev & ~3;
812 LOCAL_GrowArenaDownward( ds, movearena, movesize );
813 /* Update handle table entry */
814 pEntry->addr = finalarena + ARENA_HEADER_SIZE + MOVEABLE_PREFIX;
818 table = *(WORD *)pEntry;
820 freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
821 if(freespace >= minfree || (flags & LMEM_NODISCARD))
823 TRACE("Returning %04x.\n", freespace);
827 table = pInfo->htable;
830 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
831 for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
833 if(pEntry->addr && pEntry->lock == 0 &&
834 (pEntry->flags & (LMEM_DISCARDABLE >> 8)))
836 TRACE("Discarding handle %04x (block %04x).\n",
837 (char *)pEntry - ptr, pEntry->addr);
838 LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX));
839 call_notify_func(pInfo->notify, LN_DISCARD, (char *)pEntry - ptr, pEntry->flags);
841 pEntry->flags = (LMEM_DISCARDED >> 8);
844 table = *(WORD *)pEntry;
846 return LOCAL_Compact(ds, 0xffff, LMEM_NODISCARD);
850 /***********************************************************************
851 * LOCAL_FindFreeBlock
853 static HLOCAL16 LOCAL_FindFreeBlock( HANDLE16 ds, WORD size )
855 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
856 LOCALHEAPINFO *pInfo;
860 if (!(pInfo = LOCAL_GetHeap( ds )))
862 ERR("Local heap not found\n" );
867 arena = pInfo->first;
868 pArena = ARENA_PTR( ptr, arena );
870 arena = pArena->free_next;
871 pArena = ARENA_PTR( ptr, arena );
872 if (arena == pArena->free_next) break;
873 if (pArena->size >= size) return arena;
875 TRACE("not enough space\n" );
881 /***********************************************************************
884 static const char *get_heap_name( WORD ds )
886 HINSTANCE16 inst = LoadLibrary16( "GDI" );
887 if (ds == GlobalHandleToSel16( inst ))
889 FreeLibrary16( inst );
892 FreeLibrary16( inst );
893 inst = LoadLibrary16( "USER" );
894 if (ds == GlobalHandleToSel16( inst ))
896 FreeLibrary16( inst );
899 FreeLibrary16( inst );
903 /***********************************************************************
905 * The segment may get moved around in this function, so all callers
906 * should reset their pointer variables.
908 static HLOCAL16 LOCAL_GetBlock( HANDLE16 ds, WORD size, WORD flags )
910 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
911 LOCALHEAPINFO *pInfo;
915 if (!(pInfo = LOCAL_GetHeap( ds )))
917 ERR("Local heap not found\n");
922 size += ARENA_HEADER_SIZE;
923 size = LALIGN( max( size, sizeof(LOCALARENA) ) );
928 /* Find a suitable free block */
929 arena = LOCAL_FindFreeBlock( ds, size );
931 /* no space: try to make some */
932 LOCAL_Compact( ds, size, flags );
933 arena = LOCAL_FindFreeBlock( ds, size );
936 /* still no space: try to grow the segment */
937 if (!(LOCAL_GrowHeap( ds )))
940 /* FIXME: doesn't work correctly yet */
941 if (call_notify_func(pInfo->notify, LN_OUTOFMEM, ds - 20, size)) /* FIXME: "size" correct ? (should indicate bytes needed) */
944 ERR( "not enough space in %s heap %04x for %d bytes\n",
945 get_heap_name(ds), ds, size );
948 ptr = MapSL( MAKESEGPTR( ds, 0 ) );
949 pInfo = LOCAL_GetHeap( ds );
950 arena = LOCAL_FindFreeBlock( ds, size );
953 ERR( "not enough space in %s heap %04x for %d bytes\n",
954 get_heap_name(ds), ds, size );
956 /* FIXME: "size" correct ? (should indicate bytes needed) */
957 if (call_notify_func(pInfo->notify, LN_OUTOFMEM, ds, size)) goto notify_done;
962 /* Make a block out of the free arena */
963 pArena = ARENA_PTR( ptr, arena );
964 TRACE("size = %04x, arena %04x size %04x\n", size, arena, pArena->size );
965 LOCAL_RemoveFreeBlock( ptr, arena );
966 LOCAL_ShrinkArena( ds, arena, size );
968 if (flags & LMEM_ZEROINIT)
969 memset((char *)pArena + ARENA_HEADER_SIZE, 0, size-ARENA_HEADER_SIZE);
970 return arena + ARENA_HEADER_SIZE;
974 /***********************************************************************
977 static BOOL16 LOCAL_NewHTable( HANDLE16 ds )
979 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
980 LOCALHEAPINFO *pInfo;
981 LOCALHANDLEENTRY *pEntry;
986 if (!(pInfo = LOCAL_GetHeap( ds )))
988 ERR("Local heap not found\n");
993 if (!(handle = LOCAL_GetBlock( ds, pInfo->hdelta * sizeof(LOCALHANDLEENTRY)
994 + 2 * sizeof(WORD), LMEM_FIXED )))
996 if (!(ptr = MapSL( MAKESEGPTR( ds, 0 ) )))
997 ERR("ptr == NULL after GetBlock.\n");
998 if (!(pInfo = LOCAL_GetHeap( ds )))
999 ERR("pInfo == NULL after GetBlock.\n");
1001 /* Fill the entry table */
1003 *(WORD *)(ptr + handle) = pInfo->hdelta;
1004 pEntry = (LOCALHANDLEENTRY *)(ptr + handle + sizeof(WORD));
1005 for (i = pInfo->hdelta; i > 0; i--, pEntry++) {
1006 pEntry->lock = pEntry->flags = 0xff;
1009 *(WORD *)pEntry = pInfo->htable;
1010 pInfo->htable = handle;
1015 /***********************************************************************
1016 * LOCAL_GetNewHandleEntry
1018 static HLOCAL16 LOCAL_GetNewHandleEntry( HANDLE16 ds )
1020 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1021 LOCALHEAPINFO *pInfo;
1022 LOCALHANDLEENTRY *pEntry = NULL;
1025 if (!(pInfo = LOCAL_GetHeap( ds )))
1027 ERR("Local heap not found\n");
1028 LOCAL_PrintHeap(ds);
1032 /* Find a free slot in existing tables */
1034 table = pInfo->htable;
1037 WORD count = *(WORD *)(ptr + table);
1038 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
1039 for (; count > 0; count--, pEntry++)
1040 if (pEntry->lock == 0xff) break;
1042 table = *(WORD *)pEntry;
1045 if (!table) /* We need to create a new table */
1047 if (!LOCAL_NewHTable( ds )) return 0;
1048 ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1049 pInfo = LOCAL_GetHeap( ds );
1050 pEntry = (LOCALHANDLEENTRY *)(ptr + pInfo->htable + sizeof(WORD));
1053 /* Now allocate this entry */
1057 TRACE("(%04x): %04x\n", ds, ((char *)pEntry - ptr) );
1058 return (HLOCAL16)((char *)pEntry - ptr);
1062 /***********************************************************************
1063 * LOCAL_FreeHandleEntry
1065 * Free a handle table entry.
1067 static void LOCAL_FreeHandleEntry( HANDLE16 ds, HLOCAL16 handle )
1069 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1070 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1071 LOCALHEAPINFO *pInfo;
1073 WORD table, count, i;
1075 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
1077 /* Find the table where this handle comes from */
1079 pTable = &pInfo->htable;
1082 WORD size = (*(WORD *)(ptr + *pTable)) * sizeof(LOCALHANDLEENTRY);
1083 if ((handle >= *pTable + sizeof(WORD)) &&
1084 (handle < *pTable + sizeof(WORD) + size)) break; /* Found it */
1085 pTable = (WORD *)(ptr + *pTable + sizeof(WORD) + size);
1089 ERR("Invalid entry %04x\n", handle);
1090 LOCAL_PrintHeap( ds );
1094 /* Make the entry free */
1096 pEntry->addr = 0; /* just in case */
1097 pEntry->lock = 0xff;
1098 pEntry->flags = 0xff;
1099 /* Now check if all entries in this table are free */
1102 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
1103 count = *(WORD *)(ptr + table);
1104 for (i = count; i > 0; i--, pEntry++) if (pEntry->lock != 0xff) return;
1106 /* Remove the table from the linked list and free it */
1108 TRACE("(%04x): freeing table %04x\n", ds, table);
1109 *pTable = *(WORD *)pEntry;
1110 LOCAL_FreeArena( ds, ARENA_HEADER( table ) );
1114 /***********************************************************************
1115 * LocalFree (KERNEL.7)
1117 HLOCAL16 WINAPI LocalFree16( HLOCAL16 handle )
1119 HANDLE16 ds = CURRENT_DS;
1120 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1122 TRACE("%04x ds=%04x\n", handle, ds );
1124 if (!handle) { WARN("Handle is 0.\n" ); return 0; }
1125 if (HANDLE_FIXED( handle ))
1127 if (!LOCAL_FreeArena( ds, ARENA_HEADER( handle ) )) return 0; /* OK */
1128 else return handle; /* couldn't free it */
1132 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1133 if (pEntry->flags != (LMEM_DISCARDED >> 8))
1135 TRACE("real block at %04x\n", pEntry->addr );
1136 if (LOCAL_FreeArena( ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX) ))
1137 return handle; /* couldn't free it */
1139 LOCAL_FreeHandleEntry( ds, handle );
1145 /***********************************************************************
1146 * LocalAlloc (KERNEL.5)
1148 HLOCAL16 WINAPI LocalAlloc16( UINT16 flags, WORD size )
1150 HANDLE16 ds = CURRENT_DS;
1151 HLOCAL16 handle = 0;
1154 TRACE("%04x %d ds=%04x\n", flags, size, ds );
1156 if(size > 0 && size <= 4) size = 5;
1157 if (flags & LMEM_MOVEABLE)
1159 LOCALHANDLEENTRY *plhe;
1164 if (!(hmem = LOCAL_GetBlock( ds, size + MOVEABLE_PREFIX, flags )))
1167 else /* We just need to allocate a discarded handle */
1169 if (!(handle = LOCAL_GetNewHandleEntry( ds )))
1171 WARN("Couldn't get handle.\n");
1173 LOCAL_FreeArena( ds, ARENA_HEADER(hmem) );
1176 ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1177 plhe = (LOCALHANDLEENTRY *)(ptr + handle);
1181 plhe->addr = hmem + MOVEABLE_PREFIX;
1182 plhe->flags = (BYTE)((flags & 0x0f00) >> 8);
1183 *(HLOCAL16 *)(ptr + hmem) = handle;
1188 plhe->flags = LMEM_DISCARDED >> 8;
1193 if(size) handle = LOCAL_GetBlock( ds, size, flags );
1197 CURRENT_STACK16->ecx = handle; /* must be returned in cx too */
1202 /***********************************************************************
1203 * LocalReAlloc (KERNEL.6)
1205 HLOCAL16 WINAPI LocalReAlloc16( HLOCAL16 handle, WORD size, UINT16 flags )
1207 HANDLE16 ds = CURRENT_DS;
1208 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1209 LOCALHEAPINFO *pInfo;
1210 LOCALARENA *pArena, *pNext;
1211 LOCALHANDLEENTRY *pEntry = NULL;
1212 WORD arena, oldsize;
1213 HLOCAL16 hmem, blockhandle;
1216 if (!handle) return 0;
1217 if(HANDLE_MOVEABLE(handle) &&
1218 ((LOCALHANDLEENTRY *)(ptr + handle))->lock == 0xff) /* An unused handle */
1221 TRACE("%04x %d %04x ds=%04x\n", handle, size, flags, ds );
1222 if (!(pInfo = LOCAL_GetHeap( ds ))) return 0;
1224 if (HANDLE_FIXED( handle ))
1225 blockhandle = handle;
1228 pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
1229 if(pEntry->flags == (LMEM_DISCARDED >> 8))
1233 WARN("Dicarded block has non-zero addr.\n");
1234 TRACE("ReAllocating discarded block\n");
1235 if(size <= 4) size = 5;
1236 if (!(hl = LOCAL_GetBlock( ds, size + MOVEABLE_PREFIX, flags)))
1238 ptr = MapSL( MAKESEGPTR( ds, 0 ) ); /* Reload ptr */
1239 pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
1240 pEntry->addr = hl + MOVEABLE_PREFIX;
1243 *(HLOCAL16 *)(ptr + hl) = handle;
1246 if (((blockhandle = pEntry->addr - MOVEABLE_PREFIX) & 3) != 0)
1248 ERR("(%04x,%04x): invalid handle\n",
1252 if (*(HLOCAL16 *)(ptr + blockhandle) != handle) {
1253 ERR("Back ptr to handle is invalid\n");
1258 if (flags & LMEM_MODIFY)
1260 if (HANDLE_MOVEABLE(handle))
1262 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1263 pEntry->flags = (flags & 0x0f00) >> 8;
1264 TRACE("Changing flags to %x.\n", pEntry->flags);
1271 if (flags & LMEM_MOVEABLE)
1273 if (HANDLE_FIXED(handle))
1275 TRACE("Freeing fixed block.\n");
1276 return LocalFree16( handle );
1278 else /* Moveable block */
1280 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1281 if (pEntry->lock == 0)
1283 /* discards moveable blocks */
1284 TRACE("Discarding block\n");
1285 LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX));
1287 pEntry->flags = (LMEM_DISCARDED >> 8);
1295 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1296 if (pEntry->lock == 0)
1299 return LocalFree16( handle );
1305 arena = ARENA_HEADER( blockhandle );
1306 TRACE("arena is %04x\n", arena );
1307 pArena = ARENA_PTR( ptr, arena );
1309 if(size <= 4) size = 5;
1310 if(HANDLE_MOVEABLE(handle)) size += MOVEABLE_PREFIX;
1311 oldsize = pArena->next - arena - ARENA_HEADER_SIZE;
1312 nextarena = LALIGN(blockhandle + size);
1314 /* Check for size reduction */
1316 if (nextarena <= pArena->next)
1318 TRACE("size reduction, making new free block\n");
1319 LOCAL_ShrinkArena(ds, arena, nextarena - arena);
1320 TRACE("returning %04x\n", handle );
1324 /* Check if the next block is free and large enough */
1326 pNext = ARENA_PTR( ptr, pArena->next );
1327 if (((pNext->prev & 3) == LOCAL_ARENA_FREE) &&
1328 (nextarena <= pNext->next))
1330 TRACE("size increase, making new free block\n");
1331 LOCAL_GrowArenaUpward(ds, arena, nextarena - arena);
1332 TRACE("returning %04x\n", handle );
1336 /* Now we have to allocate a new block, but not if (fixed block or locked
1337 block) and no LMEM_MOVEABLE */
1339 if (!(flags & LMEM_MOVEABLE))
1341 if (HANDLE_FIXED(handle))
1343 ERR("Needed to move fixed block, but LMEM_MOVEABLE not specified.\n");
1348 if(((LOCALHANDLEENTRY *)(ptr + handle))->lock != 0)
1350 ERR("Needed to move locked block, but LMEM_MOVEABLE not specified.\n");
1356 hmem = LOCAL_GetBlock( ds, size, flags );
1357 ptr = MapSL( MAKESEGPTR( ds, 0 )); /* Reload ptr */
1358 if(HANDLE_MOVEABLE(handle)) /* LOCAL_GetBlock might have triggered */
1359 { /* a compaction, which might in turn have */
1360 blockhandle = pEntry->addr - MOVEABLE_PREFIX; /* moved the very block we are resizing */
1361 arena = ARENA_HEADER( blockhandle ); /* thus, we reload arena, too */
1365 /* Remove the block from the heap and try again */
1366 LPSTR buffer = HeapAlloc( GetProcessHeap(), 0, oldsize );
1367 if (!buffer) return 0;
1368 memcpy( buffer, ptr + arena + ARENA_HEADER_SIZE, oldsize );
1369 LOCAL_FreeArena( ds, arena );
1370 if (!(hmem = LOCAL_GetBlock( ds, size, flags )))
1372 if (!(hmem = LOCAL_GetBlock( ds, oldsize, flags )))
1374 ERR("Can't restore saved block\n" );
1375 HeapFree( GetProcessHeap(), 0, buffer );
1380 ptr = MapSL( MAKESEGPTR( ds, 0 ) ); /* Reload ptr */
1381 memcpy( ptr + hmem, buffer, oldsize );
1382 HeapFree( GetProcessHeap(), 0, buffer );
1386 memcpy( ptr + hmem, ptr + (arena + ARENA_HEADER_SIZE), oldsize );
1387 LOCAL_FreeArena( ds, arena );
1389 if (HANDLE_MOVEABLE( handle ))
1391 TRACE("fixing handle\n");
1392 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1393 pEntry->addr = hmem + MOVEABLE_PREFIX;
1394 /* Back ptr should still be correct */
1395 if(*(HLOCAL16 *)(ptr + hmem) != handle)
1396 ERR("back ptr is invalid.\n");
1399 if (size == oldsize) hmem = 0; /* Realloc failed */
1400 TRACE("returning %04x\n", hmem );
1405 /***********************************************************************
1406 * LOCAL_InternalLock
1408 static HLOCAL16 LOCAL_InternalLock( LPSTR heap, HLOCAL16 handle )
1410 HLOCAL16 old_handle = handle;
1412 if (HANDLE_MOVEABLE(handle))
1414 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(heap + handle);
1415 if (pEntry->flags == (LMEM_DISCARDED >> 8)) return 0;
1416 if (pEntry->lock < 0xfe) pEntry->lock++;
1417 handle = pEntry->addr;
1419 TRACE("%04x returning %04x\n", old_handle, handle );
1424 /***********************************************************************
1425 * LocalUnlock (KERNEL.9)
1427 BOOL16 WINAPI LocalUnlock16( HLOCAL16 handle )
1429 HANDLE16 ds = CURRENT_DS;
1430 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1432 TRACE("%04x\n", handle );
1433 if (HANDLE_MOVEABLE(handle))
1435 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1436 if (!pEntry->lock || (pEntry->lock == 0xff)) return FALSE;
1437 /* For moveable block, return the new lock count */
1438 /* (see _Windows_Internals_ p. 197) */
1439 return --pEntry->lock;
1445 /***********************************************************************
1446 * LocalSize (KERNEL.10)
1448 UINT16 WINAPI LocalSize16( HLOCAL16 handle )
1450 HANDLE16 ds = CURRENT_DS;
1451 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1454 TRACE("%04x ds=%04x\n", handle, ds );
1456 if (!handle) return 0;
1457 if (HANDLE_MOVEABLE( handle ))
1459 handle = *(WORD *)(ptr + handle);
1460 if (!handle) return 0;
1461 pArena = ARENA_PTR( ptr, ARENA_HEADER(handle - MOVEABLE_PREFIX) );
1464 pArena = ARENA_PTR( ptr, ARENA_HEADER(handle) );
1466 return pArena->next - handle;
1470 /***********************************************************************
1471 * LocalFlags (KERNEL.12)
1473 UINT16 WINAPI LocalFlags16( HLOCAL16 handle )
1475 HANDLE16 ds = CURRENT_DS;
1476 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1478 if (HANDLE_MOVEABLE(handle))
1480 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1481 TRACE("(%04x,%04x): returning %04x\n",
1482 ds, handle, pEntry->lock | (pEntry->flags << 8) );
1483 return pEntry->lock | (pEntry->flags << 8);
1487 TRACE("(%04x,%04x): returning 0\n",
1494 /***********************************************************************
1495 * LocalHeapSize (KERNEL.162)
1497 WORD WINAPI LocalHeapSize16(void)
1499 HANDLE16 ds = CURRENT_DS;
1500 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
1501 return pInfo ? pInfo->last - pInfo->first : 0;
1505 /***********************************************************************
1506 * LocalCountFree (KERNEL.161)
1508 WORD WINAPI LocalCountFree16(void)
1510 HANDLE16 ds = CURRENT_DS;
1513 LOCALHEAPINFO *pInfo;
1514 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1516 if (!(pInfo = LOCAL_GetHeap( ds )))
1518 ERR("(%04x): Local heap not found\n", ds );
1519 LOCAL_PrintHeap( ds );
1524 arena = pInfo->first;
1525 pArena = ARENA_PTR( ptr, arena );
1528 arena = pArena->free_next;
1529 pArena = ARENA_PTR( ptr, arena );
1530 if (arena == pArena->free_next) break;
1531 total += pArena->size;
1533 TRACE("(%04x): returning %d\n", ds, total);
1538 /***********************************************************************
1539 * LocalHandle (KERNEL.11)
1541 HLOCAL16 WINAPI LocalHandle16( WORD addr )
1543 HANDLE16 ds = CURRENT_DS;
1544 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1545 LOCALHEAPINFO *pInfo;
1548 if (!(pInfo = LOCAL_GetHeap( ds )))
1550 ERR("(%04x): Local heap not found\n", ds );
1551 LOCAL_PrintHeap( ds );
1555 /* Find the address in the entry tables */
1557 table = pInfo->htable;
1560 WORD count = *(WORD *)(ptr + table);
1561 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY*)(ptr+table+sizeof(WORD));
1562 for (; count > 0; count--, pEntry++)
1563 if (pEntry->addr == addr) return (HLOCAL16)((char *)pEntry - ptr);
1564 table = *(WORD *)pEntry;
1567 return (HLOCAL16)addr; /* Fixed block handle is addr */
1573 /***********************************************************************
1574 * LocalLock (KERNEL.8)
1576 * Note: only the offset part of the pointer is returned by the relay code.
1578 SEGPTR WINAPI LocalLock16( HLOCAL16 handle )
1580 WORD ds = CURRENT_DS;
1581 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1582 return MAKESEGPTR( ds, LOCAL_InternalLock( ptr, handle ) );
1586 /***********************************************************************
1587 * LocalCompact (KERNEL.13)
1589 UINT16 WINAPI LocalCompact16( UINT16 minfree )
1591 TRACE("%04x\n", minfree );
1592 return LOCAL_Compact( CURRENT_DS, minfree, 0 );
1596 /***********************************************************************
1597 * LocalNotify (KERNEL.14)
1599 * Installs a callback function that is called for local memory events
1600 * Callback function prototype is
1601 * BOOL16 NotifyFunc(WORD wMsg, HLOCAL16 hMem, WORD wArg)
1604 * NotifyFunc seems to be responsible for allocating some memory,
1605 * returns TRUE for success.
1606 * wArg = number of bytes needed additionally
1608 * hMem = handle; wArg = old mem location
1610 * NotifyFunc seems to be strongly encouraged to return TRUE,
1611 * otherwise LogError() gets called.
1612 * hMem = handle; wArg = flags
1614 FARPROC16 WINAPI LocalNotify16( FARPROC16 func )
1616 LOCALHEAPINFO *pInfo;
1617 FARPROC16 oldNotify;
1618 HANDLE16 ds = CURRENT_DS;
1620 if (!(pInfo = LOCAL_GetHeap( ds )))
1622 ERR("(%04x): Local heap not found\n", ds );
1623 LOCAL_PrintHeap( ds );
1626 TRACE("(%04x): %08lx\n", ds, (DWORD)func );
1627 FIXME("Half implemented\n");
1628 oldNotify = pInfo->notify;
1629 pInfo->notify = func;
1634 /***********************************************************************
1635 * LocalShrink (KERNEL.121)
1637 UINT16 WINAPI LocalShrink16( HGLOBAL16 handle, UINT16 newsize )
1639 TRACE("%04x %04x\n", handle, newsize );
1644 /***********************************************************************
1645 * GetHeapSpaces (KERNEL.138)
1647 DWORD WINAPI GetHeapSpaces16( HMODULE16 module )
1650 WORD oldDS = CURRENT_DS;
1653 if (!(pModule = NE_GetPtr( module ))) return 0;
1654 CURRENT_DS = GlobalHandleToSel16((NE_SEG_TABLE( pModule ) + pModule->ne_autodata - 1)->hSeg);
1655 spaces = MAKELONG( LocalCountFree16(), LocalHeapSize16() );
1661 /***********************************************************************
1662 * LocalHandleDelta (KERNEL.310)
1664 WORD WINAPI LocalHandleDelta16( WORD delta )
1666 LOCALHEAPINFO *pInfo;
1668 if (!(pInfo = LOCAL_GetHeap( CURRENT_DS )))
1670 ERR("Local heap not found\n");
1671 LOCAL_PrintHeap( CURRENT_DS );
1674 if (delta) pInfo->hdelta = delta;
1675 TRACE("returning %04x\n", pInfo->hdelta);
1676 return pInfo->hdelta;
1680 /***********************************************************************
1681 * LocalInfo (TOOLHELP.56)
1683 BOOL16 WINAPI LocalInfo16( LOCALINFO *pLocalInfo, HGLOBAL16 handle )
1685 LOCALHEAPINFO *pInfo = LOCAL_GetHeap(SELECTOROF(K32WOWGlobalLock16(handle)));
1686 if (!pInfo) return FALSE;
1687 pLocalInfo->wcItems = pInfo->items;
1692 /***********************************************************************
1693 * LocalFirst (TOOLHELP.57)
1695 BOOL16 WINAPI LocalFirst16( LOCALENTRY *pLocalEntry, HGLOBAL16 handle )
1697 WORD ds = GlobalHandleToSel16( handle );
1698 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1699 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
1700 if (!pInfo) return FALSE;
1702 pLocalEntry->hHandle = pInfo->first + ARENA_HEADER_SIZE;
1703 pLocalEntry->wAddress = pLocalEntry->hHandle;
1704 pLocalEntry->wFlags = LF_FIXED;
1705 pLocalEntry->wcLock = 0;
1706 pLocalEntry->wType = LT_NORMAL;
1707 pLocalEntry->hHeap = handle;
1708 pLocalEntry->wHeapType = NORMAL_HEAP;
1709 pLocalEntry->wNext = ARENA_PTR(ptr,pInfo->first)->next;
1710 pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
1715 /***********************************************************************
1716 * LocalNext (TOOLHELP.58)
1718 BOOL16 WINAPI LocalNext16( LOCALENTRY *pLocalEntry )
1720 WORD ds = GlobalHandleToSel16( pLocalEntry->hHeap );
1721 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1724 if (!LOCAL_GetHeap( ds )) return FALSE;
1725 if (!pLocalEntry->wNext) return FALSE;
1726 pArena = ARENA_PTR( ptr, pLocalEntry->wNext );
1728 pLocalEntry->hHandle = pLocalEntry->wNext + ARENA_HEADER_SIZE;
1729 pLocalEntry->wAddress = pLocalEntry->hHandle;
1730 pLocalEntry->wFlags = (pArena->prev & 3) + 1;
1731 pLocalEntry->wcLock = 0;
1732 pLocalEntry->wType = LT_NORMAL;
1733 if (pArena->next != pLocalEntry->wNext) /* last one? */
1734 pLocalEntry->wNext = pArena->next;
1736 pLocalEntry->wNext = 0;
1737 pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
1742 /***********************************************************************
1743 * 32-bit local heap functions (Win95; undocumented)
1746 /***********************************************************************
1749 HANDLE WINAPI Local32Init16( WORD segment, DWORD tableSize,
1750 DWORD heapSize, DWORD flags )
1752 DWORD totSize, segSize = 0;
1754 LOCAL32HEADER *header;
1756 WORD *selectorTable;
1757 WORD selectorEven, selectorOdd;
1760 /* Determine new heap size */
1764 if ( (segSize = GetSelectorLimit16( segment )) == 0 )
1770 if ( heapSize == -1L )
1771 heapSize = 1024L*1024L; /* FIXME */
1773 heapSize = (heapSize + 0xffff) & 0xffff0000;
1774 segSize = (segSize + 0x0fff) & 0xfffff000;
1775 totSize = segSize + HTABLE_SIZE + heapSize;
1778 /* Allocate memory and initialize heap */
1780 if ( !(base = VirtualAlloc( NULL, totSize, MEM_RESERVE, PAGE_READWRITE )) )
1783 if ( !VirtualAlloc( base, segSize + HTABLE_PAGESIZE,
1784 MEM_COMMIT, PAGE_READWRITE ) )
1786 VirtualFree( base, 0, MEM_RELEASE );
1790 if (!(heap = RtlCreateHeap( 0, base + segSize + HTABLE_SIZE, heapSize, 0x10000, NULL, NULL )))
1792 VirtualFree( base, 0, MEM_RELEASE );
1797 /* Set up header and handle table */
1799 header = (LOCAL32HEADER *)(base + segSize);
1800 header->base = base;
1801 header->limit = HTABLE_PAGESIZE-1;
1803 header->magic = LOCAL32_MAGIC;
1804 header->heap = heap;
1806 header->freeListFirst[0] = sizeof(LOCAL32HEADER);
1807 header->freeListLast[0] = HTABLE_PAGESIZE - 4;
1808 header->freeListSize[0] = (HTABLE_PAGESIZE - sizeof(LOCAL32HEADER)) / 4;
1810 for (i = header->freeListFirst[0]; i < header->freeListLast[0]; i += 4)
1811 *(DWORD *)((LPBYTE)header + i) = i+4;
1813 header->freeListFirst[1] = 0xffff;
1816 /* Set up selector table */
1818 nrBlocks = (totSize + 0x7fff) >> 15;
1819 selectorTable = HeapAlloc( header->heap, 0, nrBlocks * 2 );
1820 selectorEven = SELECTOR_AllocBlock( base, totSize, WINE_LDT_FLAGS_DATA );
1821 selectorOdd = SELECTOR_AllocBlock( base + 0x8000, totSize - 0x8000, WINE_LDT_FLAGS_DATA );
1822 if ( !selectorTable || !selectorEven || !selectorOdd )
1824 HeapFree( header->heap, 0, selectorTable );
1825 if ( selectorEven ) SELECTOR_FreeBlock( selectorEven );
1826 if ( selectorOdd ) SELECTOR_FreeBlock( selectorOdd );
1827 HeapDestroy( header->heap );
1828 VirtualFree( base, 0, MEM_RELEASE );
1832 header->selectorTableOffset = (LPBYTE)selectorTable - header->base;
1833 header->selectorTableSize = nrBlocks * 4; /* ??? Win95 does it this way! */
1834 header->selectorDelta = selectorEven - selectorOdd;
1835 header->segment = segment? segment : selectorEven;
1837 for (i = 0; i < nrBlocks; i++)
1838 selectorTable[i] = (i & 1)? selectorOdd + ((i >> 1) << __AHSHIFT)
1839 : selectorEven + ((i >> 1) << __AHSHIFT);
1841 /* Move old segment */
1845 /* FIXME: This is somewhat ugly and relies on implementation
1846 details about 16-bit global memory handles ... */
1848 LPBYTE oldBase = (LPBYTE)GetSelectorBase( segment );
1849 memcpy( base, oldBase, segSize );
1850 GLOBAL_MoveBlock( segment, base, totSize );
1851 HeapFree( GetProcessHeap(), 0, oldBase );
1854 return (HANDLE)header;
1857 /***********************************************************************
1858 * Local32_SearchHandle
1860 static LPDWORD Local32_SearchHandle( LOCAL32HEADER *header, DWORD addr )
1864 for ( handle = (LPDWORD)((LPBYTE)header + sizeof(LOCAL32HEADER));
1865 handle < (LPDWORD)((LPBYTE)header + header->limit);
1868 if (*handle == addr)
1875 /***********************************************************************
1878 static VOID Local32_ToHandle( LOCAL32HEADER *header, INT16 type,
1879 DWORD addr, LPDWORD *handle, LPBYTE *ptr )
1886 case -2: /* 16:16 pointer, no handles */
1887 *ptr = MapSL( addr );
1888 *handle = (LPDWORD)*ptr;
1891 case -1: /* 32-bit offset, no handles */
1892 *ptr = header->base + addr;
1893 *handle = (LPDWORD)*ptr;
1896 case 0: /* handle */
1897 if ( addr >= sizeof(LOCAL32HEADER)
1898 && addr < header->limit && !(addr & 3)
1899 && *(LPDWORD)((LPBYTE)header + addr) >= HTABLE_SIZE )
1901 *handle = (LPDWORD)((LPBYTE)header + addr);
1902 *ptr = header->base + **handle;
1906 case 1: /* 16:16 pointer */
1907 *ptr = MapSL( addr );
1908 *handle = Local32_SearchHandle( header, *ptr - header->base );
1911 case 2: /* 32-bit offset */
1912 *ptr = header->base + addr;
1913 *handle = Local32_SearchHandle( header, *ptr - header->base );
1918 /***********************************************************************
1919 * Local32_FromHandle
1921 static VOID Local32_FromHandle( LOCAL32HEADER *header, INT16 type,
1922 DWORD *addr, LPDWORD handle, LPBYTE ptr )
1926 case -2: /* 16:16 pointer */
1929 WORD *selTable = (LPWORD)(header->base + header->selectorTableOffset);
1930 DWORD offset = (LPBYTE)ptr - header->base;
1931 *addr = MAKELONG( offset & 0x7fff, selTable[offset >> 15] );
1935 case -1: /* 32-bit offset */
1937 *addr = ptr - header->base;
1940 case 0: /* handle */
1941 *addr = (LPBYTE)handle - (LPBYTE)header;
1946 /***********************************************************************
1949 DWORD WINAPI Local32Alloc16( HANDLE heap, DWORD size, INT16 type, DWORD flags )
1951 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
1956 /* Allocate memory */
1957 ptr = HeapAlloc( header->heap,
1958 (flags & LMEM_MOVEABLE)? HEAP_ZERO_MEMORY : 0, size );
1962 /* Allocate handle if requested */
1967 /* Find first page of handle table with free slots */
1968 for (page = 0; page < HTABLE_NPAGES; page++)
1969 if (header->freeListFirst[page] != 0)
1971 if (page == HTABLE_NPAGES)
1973 WARN("Out of handles!\n" );
1974 HeapFree( header->heap, 0, ptr );
1978 /* If virgin page, initialize it */
1979 if (header->freeListFirst[page] == 0xffff)
1981 if ( !VirtualAlloc( (LPBYTE)header + (page << 12),
1982 0x1000, MEM_COMMIT, PAGE_READWRITE ) )
1984 WARN("Cannot grow handle table!\n" );
1985 HeapFree( header->heap, 0, ptr );
1989 header->limit += HTABLE_PAGESIZE;
1991 header->freeListFirst[page] = 0;
1992 header->freeListLast[page] = HTABLE_PAGESIZE - 4;
1993 header->freeListSize[page] = HTABLE_PAGESIZE / 4;
1995 for (i = 0; i < HTABLE_PAGESIZE; i += 4)
1996 *(DWORD *)((LPBYTE)header + i) = i+4;
1998 if (page < HTABLE_NPAGES-1)
1999 header->freeListFirst[page+1] = 0xffff;
2002 /* Allocate handle slot from page */
2003 handle = (LPDWORD)((LPBYTE)header + header->freeListFirst[page]);
2004 if (--header->freeListSize[page] == 0)
2005 header->freeListFirst[page] = header->freeListLast[page] = 0;
2007 header->freeListFirst[page] = *handle;
2009 /* Store 32-bit offset in handle slot */
2010 *handle = ptr - header->base;
2014 handle = (LPDWORD)ptr;
2019 /* Convert handle to requested output type */
2020 Local32_FromHandle( header, type, &addr, handle, ptr );
2024 /***********************************************************************
2027 DWORD WINAPI Local32ReAlloc16( HANDLE heap, DWORD addr, INT16 type,
2028 DWORD size, DWORD flags )
2030 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2035 return Local32Alloc16( heap, size, type, flags );
2037 /* Retrieve handle and pointer */
2038 Local32_ToHandle( header, type, addr, &handle, &ptr );
2039 if (!handle) return FALSE;
2041 /* Reallocate memory block */
2042 ptr = HeapReAlloc( header->heap,
2043 (flags & LMEM_MOVEABLE)? HEAP_ZERO_MEMORY : 0,
2049 *handle = ptr - header->base;
2051 handle = (LPDWORD)ptr;
2053 /* Convert handle to requested output type */
2054 Local32_FromHandle( header, type, &addr, handle, ptr );
2058 /***********************************************************************
2061 BOOL WINAPI Local32Free16( HANDLE heap, DWORD addr, INT16 type )
2063 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2067 /* Retrieve handle and pointer */
2068 Local32_ToHandle( header, type, addr, &handle, &ptr );
2069 if (!handle) return FALSE;
2071 /* Free handle if necessary */
2074 int offset = (LPBYTE)handle - (LPBYTE)header;
2075 int page = offset >> 12;
2077 /* Return handle slot to page free list */
2078 if (header->freeListSize[page]++ == 0)
2079 header->freeListFirst[page] = header->freeListLast[page] = offset;
2081 *(LPDWORD)((LPBYTE)header + header->freeListLast[page]) = offset,
2082 header->freeListLast[page] = offset;
2086 /* Shrink handle table when possible */
2087 while (page > 0 && header->freeListSize[page] == HTABLE_PAGESIZE / 4)
2089 if ( VirtualFree( (LPBYTE)header +
2090 (header->limit & ~(HTABLE_PAGESIZE-1)),
2091 HTABLE_PAGESIZE, MEM_DECOMMIT ) )
2094 header->limit -= HTABLE_PAGESIZE;
2095 header->freeListFirst[page] = 0xffff;
2101 return HeapFree( header->heap, 0, ptr );
2104 /***********************************************************************
2107 DWORD WINAPI Local32Translate16( HANDLE heap, DWORD addr, INT16 type1, INT16 type2 )
2109 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2113 Local32_ToHandle( header, type1, addr, &handle, &ptr );
2114 if (!handle) return 0;
2116 Local32_FromHandle( header, type2, &addr, handle, ptr );
2120 /***********************************************************************
2123 DWORD WINAPI Local32Size16( HANDLE heap, DWORD addr, INT16 type )
2125 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2129 Local32_ToHandle( header, type, addr, &handle, &ptr );
2130 if (!handle) return 0;
2132 return HeapSize( header->heap, 0, ptr );
2135 /***********************************************************************
2138 BOOL WINAPI Local32ValidHandle16( HANDLE heap, WORD addr )
2140 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2144 Local32_ToHandle( header, 0, addr, &handle, &ptr );
2145 return handle != NULL;
2148 /***********************************************************************
2151 WORD WINAPI Local32GetSegment16( HANDLE heap )
2153 LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
2154 return header->segment;
2157 /***********************************************************************
2160 static LOCAL32HEADER *Local32_GetHeap( HGLOBAL16 handle )
2162 WORD selector = GlobalHandleToSel16( handle );
2163 DWORD base = GetSelectorBase( selector );
2164 DWORD limit = GetSelectorLimit16( selector );
2166 /* Hmmm. This is a somewhat stupid heuristic, but Windows 95 does
2169 if ( limit > 0x10000 && ((LOCAL32HEADER *)base)->magic == LOCAL32_MAGIC )
2170 return (LOCAL32HEADER *)base;
2175 if ( limit > 0x10000 && ((LOCAL32HEADER *)base)->magic == LOCAL32_MAGIC )
2176 return (LOCAL32HEADER *)base;
2181 /***********************************************************************
2182 * Local32Info (KERNEL.444)
2183 * Local32Info (TOOLHELP.84)
2185 BOOL16 WINAPI Local32Info16( LOCAL32INFO *pLocal32Info, HGLOBAL16 handle )
2187 PROCESS_HEAP_ENTRY entry;
2190 LOCAL32HEADER *header = Local32_GetHeap( handle );
2191 if ( !header ) return FALSE;
2193 if ( !pLocal32Info || pLocal32Info->dwSize < sizeof(LOCAL32INFO) )
2196 pLocal32Info->dwMemReserved = 0;
2197 pLocal32Info->dwMemCommitted = 0;
2198 pLocal32Info->dwTotalFree = 0;
2199 pLocal32Info->dwLargestFreeBlock = 0;
2201 while (HeapWalk( header->heap, &entry ))
2203 if (entry.wFlags & PROCESS_HEAP_REGION)
2205 pLocal32Info->dwMemReserved += entry.u.Region.dwCommittedSize
2206 + entry.u.Region.dwUnCommittedSize;
2207 pLocal32Info->dwMemCommitted = entry.u.Region.dwCommittedSize;
2209 else if (!(entry.wFlags & PROCESS_HEAP_ENTRY_BUSY))
2211 DWORD size = entry.cbData + entry.cbOverhead;
2212 pLocal32Info->dwTotalFree += size;
2213 if (size > pLocal32Info->dwLargestFreeBlock) pLocal32Info->dwLargestFreeBlock = size;
2217 pLocal32Info->dwcFreeHandles = 0;
2218 for ( i = 0; i < HTABLE_NPAGES; i++ )
2220 if ( header->freeListFirst[i] == 0xffff ) break;
2221 pLocal32Info->dwcFreeHandles += header->freeListSize[i];
2223 pLocal32Info->dwcFreeHandles += (HTABLE_NPAGES - i) * HTABLE_PAGESIZE/4;
2228 /***********************************************************************
2229 * Local32First (KERNEL.445)
2230 * Local32First (TOOLHELP.85)
2232 BOOL16 WINAPI Local32First16( LOCAL32ENTRY *pLocal32Entry, HGLOBAL16 handle )
2234 FIXME("(%p, %04X): stub!\n", pLocal32Entry, handle );
2238 /***********************************************************************
2239 * Local32Next (KERNEL.446)
2240 * Local32Next (TOOLHELP.86)
2242 BOOL16 WINAPI Local32Next16( LOCAL32ENTRY *pLocal32Entry )
2244 FIXME("(%p): stub!\n", pLocal32Entry );