4 * Copyright 1995 Alexandre Julliard
5 * Copyright 1996 Huw Davies
10 * All local heap functions need the current DS as first parameter
11 * when called from the emulation library, so they take one more
12 * parameter than usual.
19 #include "wine/winbase16.h"
24 #include "stackframe.h"
26 #include "debugtools.h"
29 DEFAULT_DEBUG_CHANNEL(local);
30 DECLARE_DEBUG_CHANNEL(heap);
35 WORD prev; /* Previous arena | arena type */
36 WORD next; /* Next arena */
37 /* Start of the memory block or free-list info */
38 WORD size; /* Size of the free block */
39 WORD free_prev; /* Previous free block */
40 WORD free_next; /* Next free block */
43 #define ARENA_HEADER_SIZE 4
44 #define ARENA_HEADER( handle) ((handle) - ARENA_HEADER_SIZE)
46 /* Arena types (stored in 'prev' field of the arena) */
47 #define LOCAL_ARENA_FREE 0
48 #define LOCAL_ARENA_FIXED 1
50 /* LocalNotify() msgs */
56 /* Layout of a handle entry table
58 * WORD count of entries
59 * LOCALHANDLEENTRY[count] entries
60 * WORD near ptr to next table
64 WORD addr; /* Address of the MOVEABLE block */
65 BYTE flags; /* Flags for this block */
66 BYTE lock; /* Lock count */
70 * We make addr = 4n + 2 and set *((WORD *)addr - 1) = &addr like Windows does
71 * in case something actually relies on this.
72 * Note that if the architecture does not allow unaligned accesses, we make
73 * addr = 4n + 4 to avoid returning unaligned pointers from LocalAlloc etc.
75 * An unused handle has lock = flags = 0xff. In windows addr is that of next
76 * free handle, at the moment in wine we set it to 0.
78 * A discarded block's handle has lock = addr = 0 and flags = 0x40
79 * (LMEM_DISCARDED >> 8)
82 #ifdef ALLOW_UNALIGNED_ACCESS
83 #define MOVEABLE_PREFIX sizeof(HLOCAL16)
85 #define MOVEABLE_PREFIX sizeof(int)
93 WORD check; /* 00 Heap checking flag */
94 WORD freeze; /* 02 Heap frozen flag */
95 WORD items; /* 04 Count of items on the heap */
96 WORD first; /* 06 First item of the heap */
97 WORD pad1; /* 08 Always 0 */
98 WORD last; /* 0a Last item of the heap */
99 WORD pad2; /* 0c Always 0 */
100 BYTE ncompact; /* 0e Compactions counter */
101 BYTE dislevel; /* 0f Discard level */
102 DWORD distotal; /* 10 Total bytes discarded */
103 WORD htable; /* 14 Pointer to handle table */
104 WORD hfree; /* 16 Pointer to free handle table */
105 WORD hdelta; /* 18 Delta to expand the handle table */
106 WORD expand; /* 1a Pointer to expand function (unused) */
107 WORD pstat; /* 1c Pointer to status structure (unused) */
108 FARPROC16 notify WINE_PACKED; /* 1e Pointer to LocalNotify() function */
109 WORD lock; /* 22 Lock count for the heap */
110 WORD extra; /* 24 Extra bytes to allocate when expanding */
111 WORD minsize; /* 26 Minimum size of the heap */
112 WORD magic; /* 28 Magic number */
117 #define LOCAL_HEAP_MAGIC 0x484c /* 'LH' */
119 /* All local heap allocations are aligned on 4-byte boundaries */
120 #define LALIGN(word) (((word) + 3) & ~3)
122 #define ARENA_PTR(ptr,arena) ((LOCALARENA *)((char*)(ptr)+(arena)))
123 #define ARENA_PREV(ptr,arena) (ARENA_PTR((ptr),(arena))->prev & ~3)
124 #define ARENA_NEXT(ptr,arena) (ARENA_PTR((ptr),(arena))->next)
125 #define ARENA_FLAGS(ptr,arena) (ARENA_PTR((ptr),(arena))->prev & 3)
127 /* determine whether the handle belongs to a fixed or a moveable block */
128 #define HANDLE_FIXED(handle) (((handle) & 3) == 0)
129 #define HANDLE_MOVEABLE(handle) (((handle) & 3) == 2)
132 /* ### start build ### */
133 extern WORD CALLBACK LOCAL_CallTo16_word_www(FARPROC16,WORD,HLOCAL16,WORD);
134 /* ### stop build ### */
136 /***********************************************************************
139 * Return a pointer to the local heap, making sure it exists.
141 static LOCALHEAPINFO *LOCAL_GetHeap( HANDLE16 ds )
143 LOCALHEAPINFO *pInfo;
144 INSTANCEDATA *ptr = MapSL( MAKESEGPTR( ds, 0 ));
145 TRACE("Heap at %p, %04x\n", ptr, (ptr != NULL ? ptr->heap : 0xFFFF));
146 if (!ptr || !ptr->heap) return NULL;
147 if (IsBadReadPtr16( (SEGPTR)MAKELONG(ptr->heap,ds), sizeof(LOCALHEAPINFO)))
149 WARN("Bad pointer\n");
152 pInfo = (LOCALHEAPINFO*)((char*)ptr + ptr->heap);
153 if (pInfo->magic != LOCAL_HEAP_MAGIC)
162 /***********************************************************************
163 * LOCAL_MakeBlockFree
165 * Make a block free, inserting it in the free-list.
166 * 'block' is the handle of the block arena; 'baseptr' points to
167 * the beginning of the data segment containing the heap.
169 static void LOCAL_MakeBlockFree( char *baseptr, WORD block )
171 LOCALARENA *pArena, *pNext;
174 /* Mark the block as free */
176 pArena = ARENA_PTR( baseptr, block );
177 pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FREE;
178 pArena->size = pArena->next - block;
180 /* Find the next free block (last block is always free) */
185 pNext = ARENA_PTR( baseptr, next );
186 if ((pNext->prev & 3) == LOCAL_ARENA_FREE) break;
190 TRACE("%04x, next %04x\n", block, next );
191 /* Insert the free block in the free-list */
193 pArena->free_prev = pNext->free_prev;
194 pArena->free_next = next;
195 ARENA_PTR(baseptr,pNext->free_prev)->free_next = block;
196 pNext->free_prev = block;
200 /***********************************************************************
201 * LOCAL_RemoveFreeBlock
203 * Remove a block from the free-list.
204 * 'block' is the handle of the block arena; 'baseptr' points to
205 * the beginning of the data segment containing the heap.
207 static void LOCAL_RemoveFreeBlock( char *baseptr, WORD block )
209 /* Mark the block as fixed */
211 LOCALARENA *pArena = ARENA_PTR( baseptr, block );
212 pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FIXED;
214 /* Remove it from the list */
216 ARENA_PTR(baseptr,pArena->free_prev)->free_next = pArena->free_next;
217 ARENA_PTR(baseptr,pArena->free_next)->free_prev = pArena->free_prev;
221 /***********************************************************************
224 * Insert a new block in the heap.
225 * 'new' is the handle of the new block arena; 'baseptr' points to
226 * the beginning of the data segment containing the heap; 'prev' is
227 * the block before the new one.
229 static void LOCAL_AddBlock( char *baseptr, WORD prev, WORD new )
231 LOCALARENA *pPrev = ARENA_PTR( baseptr, prev );
232 LOCALARENA *pNew = ARENA_PTR( baseptr, new );
234 pNew->prev = (prev & ~3) | LOCAL_ARENA_FIXED;
235 pNew->next = pPrev->next;
236 ARENA_PTR(baseptr,pPrev->next)->prev &= 3;
237 ARENA_PTR(baseptr,pPrev->next)->prev |= new;
242 /***********************************************************************
245 * Remove a block from the heap.
246 * 'block' is the handle of the block arena; 'baseptr' points to
247 * the beginning of the data segment containing the heap.
249 static void LOCAL_RemoveBlock( char *baseptr, WORD block )
251 LOCALARENA *pArena, *pTmp;
253 /* Remove the block from the free-list */
256 pArena = ARENA_PTR( baseptr, block );
257 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
258 LOCAL_RemoveFreeBlock( baseptr, block );
260 /* If the previous block is free, expand its size */
262 pTmp = ARENA_PTR( baseptr, pArena->prev & ~3 );
263 if ((pTmp->prev & 3) == LOCAL_ARENA_FREE)
264 pTmp->size += pArena->next - block;
266 /* Remove the block from the linked list */
268 pTmp->next = pArena->next;
269 pTmp = ARENA_PTR( baseptr, pArena->next );
270 pTmp->prev = (pTmp->prev & 3) | (pArena->prev & ~3);
274 /***********************************************************************
277 static void LOCAL_PrintHeap( HANDLE16 ds )
280 LOCALHEAPINFO *pInfo;
283 /* FIXME - the test should be done when calling the function!
284 plus is not clear that we should print this info
285 only when TRACE_ON is on! */
286 if(!TRACE_ON(local)) return;
288 ptr = MapSL( MAKESEGPTR( ds, 0 ));
289 pInfo = LOCAL_GetHeap( ds );
293 DPRINTF( "Local Heap corrupted! ds=%04x\n", ds );
296 DPRINTF( "Local Heap ds=%04x first=%04x last=%04x items=%d\n",
297 ds, pInfo->first, pInfo->last, pInfo->items );
299 arena = pInfo->first;
302 LOCALARENA *pArena = ARENA_PTR(ptr,arena);
303 DPRINTF( " %04x: prev=%04x next=%04x type=%d\n", arena,
304 pArena->prev & ~3, pArena->next, pArena->prev & 3 );
305 if (arena == pInfo->first)
307 DPRINTF( " size=%d free_prev=%04x free_next=%04x\n",
308 pArena->size, pArena->free_prev, pArena->free_next );
310 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
312 DPRINTF( " size=%d free_prev=%04x free_next=%04x\n",
313 pArena->size, pArena->free_prev, pArena->free_next );
314 if (pArena->next == arena) break; /* last one */
315 if (ARENA_PTR(ptr,pArena->free_next)->free_prev != arena)
317 DPRINTF( "*** arena->free_next->free_prev != arena\n" );
321 if (pArena->next == arena)
323 DPRINTF( "*** last block is not marked free\n" );
326 if ((ARENA_PTR(ptr,pArena->next)->prev & ~3) != arena)
328 DPRINTF( "*** arena->next->prev != arena (%04x, %04x)\n",
329 pArena->next, ARENA_PTR(ptr,pArena->next)->prev);
332 arena = pArena->next;
337 /***********************************************************************
338 * LocalInit (KERNEL.4)
340 BOOL16 WINAPI LocalInit16( HANDLE16 selector, WORD start, WORD end )
343 WORD heapInfoArena, freeArena, lastArena;
344 LOCALHEAPINFO *pHeapInfo;
345 LOCALARENA *pArena, *pFirstArena, *pLastArena;
349 /* The initial layout of the heap is: */
350 /* - first arena (FIXED) */
351 /* - heap info structure (FIXED) */
352 /* - large free block (FREE) */
353 /* - last arena (FREE) */
355 TRACE("%04x %04x-%04x\n", selector, start, end);
356 if (!selector) selector = CURRENT_DS;
360 /* If TRACE_ON(heap) is set, the global heap blocks are */
361 /* cleared before use, so we can test for double initialization. */
362 if (LOCAL_GetHeap(selector))
364 ERR("Heap %04x initialized twice.\n", selector);
365 LOCAL_PrintHeap(selector);
371 /* start == 0 means: put the local heap at the end of the segment */
373 DWORD size = GlobalSize16( GlobalHandle16( selector ) );
374 start = (WORD)(size > 0xffff ? 0xffff : size) - 1;
375 if ( end > 0xfffe ) end = 0xfffe;
381 if ((pModule = NE_GetPtr( GlobalHandle16( selector ) )))
383 SEGTABLEENTRY *pSeg = NE_SEG_TABLE( pModule );
386 for ( segNr = 0; segNr < pModule->seg_count; segNr++, pSeg++ )
387 if ( GlobalHandleToSel16(pSeg->hSeg) == selector )
390 if ( segNr < pModule->seg_count )
392 WORD minsize = pSeg->minsize;
393 if ( pModule->ss == segNr+1 )
394 minsize += pModule->stack_size;
396 TRACE(" new start %04x, minstart: %04x\n", start, minsize);
400 ptr = MapSL( MAKESEGPTR( selector, 0 ) );
402 start = LALIGN( max( start, sizeof(INSTANCEDATA) ) );
403 heapInfoArena = LALIGN(start + sizeof(LOCALARENA) );
404 freeArena = LALIGN( heapInfoArena + ARENA_HEADER_SIZE
405 + sizeof(LOCALHEAPINFO) );
406 lastArena = (end - sizeof(LOCALARENA)) & ~3;
408 /* Make sure there's enough space. */
410 if (freeArena + sizeof(LOCALARENA) >= lastArena) goto done;
412 /* Initialise the first arena */
414 pFirstArena = ARENA_PTR( ptr, start );
415 pFirstArena->prev = start | LOCAL_ARENA_FIXED;
416 pFirstArena->next = heapInfoArena;
417 pFirstArena->size = LALIGN(sizeof(LOCALARENA));
418 pFirstArena->free_prev = start; /* this one */
419 pFirstArena->free_next = freeArena;
421 /* Initialise the arena of the heap info structure */
423 pArena = ARENA_PTR( ptr, heapInfoArena );
424 pArena->prev = start | LOCAL_ARENA_FIXED;
425 pArena->next = freeArena;
427 /* Initialise the heap info structure */
429 pHeapInfo = (LOCALHEAPINFO *) (ptr + heapInfoArena + ARENA_HEADER_SIZE );
430 memset( pHeapInfo, 0, sizeof(LOCALHEAPINFO) );
431 pHeapInfo->items = 4;
432 pHeapInfo->first = start;
433 pHeapInfo->last = lastArena;
434 pHeapInfo->htable = 0;
435 pHeapInfo->hdelta = 0x20;
436 pHeapInfo->extra = 0x200;
437 pHeapInfo->minsize = lastArena - freeArena;
438 pHeapInfo->magic = LOCAL_HEAP_MAGIC;
440 /* Initialise the large free block */
442 pArena = ARENA_PTR( ptr, freeArena );
443 pArena->prev = heapInfoArena | LOCAL_ARENA_FREE;
444 pArena->next = lastArena;
445 pArena->size = lastArena - freeArena;
446 pArena->free_prev = start;
447 pArena->free_next = lastArena;
449 /* Initialise the last block */
451 pLastArena = ARENA_PTR( ptr, lastArena );
452 pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
453 pLastArena->next = lastArena; /* this one */
454 pLastArena->size = LALIGN(sizeof(LOCALARENA));
455 pLastArena->free_prev = freeArena;
456 pLastArena->free_next = lastArena; /* this one */
458 /* Store the local heap address in the instance data */
460 ((INSTANCEDATA *)ptr)->heap = heapInfoArena + ARENA_HEADER_SIZE;
461 LOCAL_PrintHeap( selector );
465 CURRENT_STACK16->ecx = ret; /* must be returned in cx too */
469 /***********************************************************************
472 static BOOL16 LOCAL_GrowHeap( HANDLE16 ds )
477 LOCALHEAPINFO *pHeapInfo;
478 WORD freeArena, lastArena;
479 LOCALARENA *pArena, *pLastArena;
482 hseg = GlobalHandle16( ds );
483 /* maybe mem allocated by Virtual*() ? */
484 if (!hseg) return FALSE;
486 oldsize = GlobalSize16( hseg );
487 /* if nothing can be gained, return */
488 if (oldsize > 0xfff0) return FALSE;
489 hseg = GlobalReAlloc16( hseg, 0x10000, GMEM_FIXED );
490 ptr = MapSL( MAKESEGPTR( ds, 0 ) );
491 pHeapInfo = LOCAL_GetHeap( ds );
492 if (pHeapInfo == NULL) {
493 ERR("Heap not found\n" );
496 end = GlobalSize16( hseg );
497 lastArena = (end - sizeof(LOCALARENA)) & ~3;
499 /* Update the HeapInfo */
501 freeArena = pHeapInfo->last;
502 pHeapInfo->last = lastArena;
503 pHeapInfo->minsize += end - oldsize;
505 /* grow the old last block */
506 pArena = ARENA_PTR( ptr, freeArena );
507 pArena->size = lastArena - freeArena;
508 pArena->next = lastArena;
509 pArena->free_next = lastArena;
511 /* Initialise the new last block */
513 pLastArena = ARENA_PTR( ptr, lastArena );
514 pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
515 pLastArena->next = lastArena; /* this one */
516 pLastArena->size = LALIGN(sizeof(LOCALARENA));
517 pLastArena->free_prev = freeArena;
518 pLastArena->free_next = lastArena; /* this one */
520 /* If block before freeArena is also free then merge them */
521 if((ARENA_PTR(ptr, (pArena->prev & ~3))->prev & 3) == LOCAL_ARENA_FREE)
523 LOCAL_RemoveBlock(ptr, freeArena);
527 TRACE("Heap expanded\n" );
528 LOCAL_PrintHeap( ds );
533 /***********************************************************************
536 static HLOCAL16 LOCAL_FreeArena( WORD ds, WORD arena )
538 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
539 LOCALHEAPINFO *pInfo;
540 LOCALARENA *pArena, *pPrev, *pNext;
542 TRACE("%04x ds=%04x\n", arena, ds );
543 if (!(pInfo = LOCAL_GetHeap( ds ))) return arena;
545 pArena = ARENA_PTR( ptr, arena );
546 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
548 /* shouldn't happen */
549 ERR("Trying to free block %04x twice!\n",
551 LOCAL_PrintHeap( ds );
555 /* Check if we can merge with the previous block */
557 pPrev = ARENA_PTR( ptr, pArena->prev & ~3 );
558 pNext = ARENA_PTR( ptr, pArena->next );
559 if ((pPrev->prev & 3) == LOCAL_ARENA_FREE)
561 arena = pArena->prev & ~3;
563 LOCAL_RemoveBlock( ptr, pPrev->next );
566 else /* Make a new free block */
568 LOCAL_MakeBlockFree( ptr, arena );
571 /* Check if we can merge with the next block */
573 if ((pArena->next == pArena->free_next) &&
574 (pArena->next != pInfo->last))
576 LOCAL_RemoveBlock( ptr, pArena->next );
583 /***********************************************************************
586 * Shrink an arena by creating a free block at its end if possible.
587 * 'size' includes the arena header, and must be aligned.
589 static void LOCAL_ShrinkArena( WORD ds, WORD arena, WORD size )
591 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
592 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
594 if (arena + size + LALIGN(sizeof(LOCALARENA)) < pArena->next)
596 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
598 LOCAL_AddBlock( ptr, arena, arena + size );
600 LOCAL_FreeArena( ds, arena + size );
605 /***********************************************************************
606 * LOCAL_GrowArenaDownward
608 * Grow an arena downward by using the previous arena (must be free).
610 static void LOCAL_GrowArenaDownward( WORD ds, WORD arena, WORD newsize )
612 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
613 LOCALHEAPINFO *pInfo;
614 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
615 WORD prevArena = pArena->prev & ~3;
616 LOCALARENA *pPrevArena = ARENA_PTR( ptr, prevArena );
620 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
621 offset = pPrevArena->size;
622 size = pArena->next - arena - ARENA_HEADER_SIZE;
623 LOCAL_RemoveFreeBlock( ptr, prevArena );
624 LOCAL_RemoveBlock( ptr, arena );
626 p = (char *)pPrevArena + ARENA_HEADER_SIZE;
627 while (offset < size)
629 memcpy( p, p + offset, offset );
633 if (size) memcpy( p, p + offset, size );
634 LOCAL_ShrinkArena( ds, prevArena, newsize );
639 /***********************************************************************
640 * LOCAL_GrowArenaUpward
642 * Grow an arena upward by using the next arena (must be free and big
643 * enough). Newsize includes the arena header and must be aligned.
645 static void LOCAL_GrowArenaUpward( WORD ds, WORD arena, WORD newsize )
647 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
648 LOCALHEAPINFO *pInfo;
649 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
650 WORD nextArena = pArena->next;
652 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
653 LOCAL_RemoveBlock( ptr, nextArena );
655 LOCAL_ShrinkArena( ds, arena, newsize );
659 /***********************************************************************
662 static WORD LOCAL_GetFreeSpace(WORD ds, WORD countdiscard)
664 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
665 LOCALHEAPINFO *pInfo;
670 if (!(pInfo = LOCAL_GetHeap( ds )))
672 ERR("Local heap not found\n" );
676 arena = pInfo->first;
677 pArena = ARENA_PTR( ptr, arena );
678 while (arena != pArena->free_next)
680 arena = pArena->free_next;
681 pArena = ARENA_PTR( ptr, arena );
682 if (pArena->size >= freespace) freespace = pArena->size;
684 /* FIXME doesn't yet calculate space that would become free if everything
685 were discarded when countdiscard == 1 */
686 if (freespace < ARENA_HEADER_SIZE) freespace = 0;
687 else freespace -= ARENA_HEADER_SIZE;
692 /***********************************************************************
695 WORD LOCAL_Compact( HANDLE16 ds, UINT16 minfree, UINT16 flags )
697 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
698 LOCALHEAPINFO *pInfo;
699 LOCALARENA *pArena, *pMoveArena, *pFinalArena;
700 WORD arena, movearena, finalarena, table;
701 WORD count, movesize, size;
703 LOCALHANDLEENTRY *pEntry;
705 if (!(pInfo = LOCAL_GetHeap( ds )))
707 ERR("Local heap not found\n" );
711 TRACE("ds = %04x, minfree = %04x, flags = %04x\n",
713 freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
714 if(freespace >= minfree || (flags & LMEM_NOCOMPACT))
716 TRACE("Returning %04x.\n", freespace);
719 TRACE("Compacting heap %04x.\n", ds);
720 table = pInfo->htable;
723 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
724 for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
726 if((pEntry->lock == 0) && (pEntry->flags != (LMEM_DISCARDED >> 8)))
728 /* OK we can move this one if we want */
729 TRACE("handle %04x (block %04x) can be moved.\n",
730 (WORD)((char *)pEntry - ptr), pEntry->addr);
731 movearena = ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX);
732 pMoveArena = ARENA_PTR(ptr, movearena);
733 movesize = pMoveArena->next - movearena;
734 arena = pInfo->first;
735 pArena = ARENA_PTR(ptr, arena);
738 /* Try to find the smallest arena that will do, */
739 /* which is below us in memory */
742 arena = pArena->free_next;
743 pArena = ARENA_PTR(ptr, arena);
744 if(arena >= movearena)
746 if(arena == pArena->free_next)
748 if((pArena->size >= movesize) && (pArena->size < size))
754 if (finalarena) /* Actually got somewhere to move */
756 TRACE("Moving it to %04x.\n", finalarena);
757 pFinalArena = ARENA_PTR(ptr, finalarena);
758 size = pFinalArena->size;
759 LOCAL_RemoveFreeBlock(ptr, finalarena);
760 LOCAL_ShrinkArena( ds, finalarena, movesize );
761 /* Copy the arena to it's new location */
762 memcpy((char *)pFinalArena + ARENA_HEADER_SIZE,
763 (char *)pMoveArena + ARENA_HEADER_SIZE,
764 movesize - ARENA_HEADER_SIZE );
765 /* Free the old location */
766 LOCAL_FreeArena(ds, movearena);
768 LOCAL_CallTo16_word_www(pInfo->notify, LN_MOVE,
769 (WORD)((char *)pEntry - ptr), pEntry->addr);
770 /* Update handle table entry */
771 pEntry->addr = finalarena + ARENA_HEADER_SIZE + MOVEABLE_PREFIX;
773 else if((ARENA_PTR(ptr, pMoveArena->prev & ~3)->prev & 3)
776 /* Previous arena is free (but < movesize) */
777 /* so we can 'slide' movearena down into it */
778 finalarena = pMoveArena->prev & ~3;
779 LOCAL_GrowArenaDownward( ds, movearena, movesize );
780 /* Update handle table entry */
781 pEntry->addr = finalarena + ARENA_HEADER_SIZE + MOVEABLE_PREFIX;
785 table = *(WORD *)pEntry;
787 freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
788 if(freespace >= minfree || (flags & LMEM_NODISCARD))
790 TRACE("Returning %04x.\n", freespace);
794 table = pInfo->htable;
797 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
798 for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
800 if(pEntry->addr && pEntry->lock == 0 &&
801 (pEntry->flags & (LMEM_DISCARDABLE >> 8)))
803 TRACE("Discarding handle %04x (block %04x).\n",
804 (char *)pEntry - ptr, pEntry->addr);
805 LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX));
807 LOCAL_CallTo16_word_www(pInfo->notify, LN_DISCARD,
808 (char *)pEntry - ptr, pEntry->flags);
810 pEntry->flags = (LMEM_DISCARDED >> 8);
813 table = *(WORD *)pEntry;
815 return LOCAL_Compact(ds, 0xffff, LMEM_NODISCARD);
819 /***********************************************************************
820 * LOCAL_FindFreeBlock
822 static HLOCAL16 LOCAL_FindFreeBlock( HANDLE16 ds, WORD size )
824 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
825 LOCALHEAPINFO *pInfo;
829 if (!(pInfo = LOCAL_GetHeap( ds )))
831 ERR("Local heap not found\n" );
836 arena = pInfo->first;
837 pArena = ARENA_PTR( ptr, arena );
839 arena = pArena->free_next;
840 pArena = ARENA_PTR( ptr, arena );
841 if (arena == pArena->free_next) break;
842 if (pArena->size >= size) return arena;
844 TRACE("not enough space\n" );
850 /***********************************************************************
853 static const char *get_heap_name( WORD ds )
855 HINSTANCE16 inst = LoadLibrary16( "GDI" );
856 if (ds == GlobalHandleToSel16( inst ))
858 FreeLibrary16( inst );
861 FreeLibrary16( inst );
862 inst = LoadLibrary16( "USER" );
863 if (ds == GlobalHandleToSel16( inst ))
865 FreeLibrary16( inst );
868 FreeLibrary16( inst );
872 /***********************************************************************
874 * The segment may get moved around in this function, so all callers
875 * should reset their pointer variables.
877 static HLOCAL16 LOCAL_GetBlock( HANDLE16 ds, WORD size, WORD flags )
879 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
880 LOCALHEAPINFO *pInfo;
884 if (!(pInfo = LOCAL_GetHeap( ds )))
886 ERR("Local heap not found\n");
891 size += ARENA_HEADER_SIZE;
892 size = LALIGN( max( size, sizeof(LOCALARENA) ) );
897 /* Find a suitable free block */
898 arena = LOCAL_FindFreeBlock( ds, size );
900 /* no space: try to make some */
901 LOCAL_Compact( ds, size, flags );
902 arena = LOCAL_FindFreeBlock( ds, size );
905 /* still no space: try to grow the segment */
906 if (!(LOCAL_GrowHeap( ds )))
909 /* FIXME: doesn't work correctly yet */
910 if ((pInfo->notify) && (LOCAL_CallTo16_word_www(pInfo->notify, LN_OUTOFMEM, ds - 20, size))) /* FIXME: "size" correct ? (should indicate bytes needed) */
915 ptr = MapSL( MAKESEGPTR( ds, 0 ) );
916 pInfo = LOCAL_GetHeap( ds );
917 arena = LOCAL_FindFreeBlock( ds, size );
920 ERR( "not enough space in %s heap %04x for %d bytes\n",
921 get_heap_name(ds), ds, size );
923 if ((pInfo->notify) &&
924 /* FIXME: "size" correct ? (should indicate bytes needed) */
925 (LOCAL_CallTo16_word_www(pInfo->notify, LN_OUTOFMEM, ds, size)))
931 /* Make a block out of the free arena */
932 pArena = ARENA_PTR( ptr, arena );
933 TRACE("size = %04x, arena %04x size %04x\n",
934 size, arena, pArena->size );
935 LOCAL_RemoveFreeBlock( ptr, arena );
936 LOCAL_ShrinkArena( ds, arena, size );
938 if (flags & LMEM_ZEROINIT)
939 memset((char *)pArena + ARENA_HEADER_SIZE, 0, size-ARENA_HEADER_SIZE);
940 return arena + ARENA_HEADER_SIZE;
944 /***********************************************************************
947 static BOOL16 LOCAL_NewHTable( HANDLE16 ds )
949 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
950 LOCALHEAPINFO *pInfo;
951 LOCALHANDLEENTRY *pEntry;
956 if (!(pInfo = LOCAL_GetHeap( ds )))
958 ERR("Local heap not found\n");
963 if (!(handle = LOCAL_GetBlock( ds, pInfo->hdelta * sizeof(LOCALHANDLEENTRY)
964 + 2 * sizeof(WORD), LMEM_FIXED )))
966 if (!(ptr = MapSL( MAKESEGPTR( ds, 0 ) )))
967 ERR("ptr == NULL after GetBlock.\n");
968 if (!(pInfo = LOCAL_GetHeap( ds )))
969 ERR("pInfo == NULL after GetBlock.\n");
971 /* Fill the entry table */
973 *(WORD *)(ptr + handle) = pInfo->hdelta;
974 pEntry = (LOCALHANDLEENTRY *)(ptr + handle + sizeof(WORD));
975 for (i = pInfo->hdelta; i > 0; i--, pEntry++) {
976 pEntry->lock = pEntry->flags = 0xff;
979 *(WORD *)pEntry = pInfo->htable;
980 pInfo->htable = handle;
985 /***********************************************************************
986 * LOCAL_GetNewHandleEntry
988 static HLOCAL16 LOCAL_GetNewHandleEntry( HANDLE16 ds )
990 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
991 LOCALHEAPINFO *pInfo;
992 LOCALHANDLEENTRY *pEntry = NULL;
995 if (!(pInfo = LOCAL_GetHeap( ds )))
997 ERR("Local heap not found\n");
1002 /* Find a free slot in existing tables */
1004 table = pInfo->htable;
1007 WORD count = *(WORD *)(ptr + table);
1008 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
1009 for (; count > 0; count--, pEntry++)
1010 if (pEntry->lock == 0xff) break;
1012 table = *(WORD *)pEntry;
1015 if (!table) /* We need to create a new table */
1017 if (!LOCAL_NewHTable( ds )) return 0;
1018 ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1019 pInfo = LOCAL_GetHeap( ds );
1020 pEntry = (LOCALHANDLEENTRY *)(ptr + pInfo->htable + sizeof(WORD));
1023 /* Now allocate this entry */
1027 TRACE("(%04x): %04x\n",
1028 ds, ((char *)pEntry - ptr) );
1029 return (HLOCAL16)((char *)pEntry - ptr);
1033 /***********************************************************************
1034 * LOCAL_FreeHandleEntry
1036 * Free a handle table entry.
1038 static void LOCAL_FreeHandleEntry( HANDLE16 ds, HLOCAL16 handle )
1040 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1041 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1042 LOCALHEAPINFO *pInfo;
1044 WORD table, count, i;
1046 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
1048 /* Find the table where this handle comes from */
1050 pTable = &pInfo->htable;
1053 WORD size = (*(WORD *)(ptr + *pTable)) * sizeof(LOCALHANDLEENTRY);
1054 if ((handle >= *pTable + sizeof(WORD)) &&
1055 (handle < *pTable + sizeof(WORD) + size)) break; /* Found it */
1056 pTable = (WORD *)(ptr + *pTable + sizeof(WORD) + size);
1060 ERR("Invalid entry %04x\n", handle);
1061 LOCAL_PrintHeap( ds );
1065 /* Make the entry free */
1067 pEntry->addr = 0; /* just in case */
1068 pEntry->lock = 0xff;
1069 pEntry->flags = 0xff;
1070 /* Now check if all entries in this table are free */
1073 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
1074 count = *(WORD *)(ptr + table);
1075 for (i = count; i > 0; i--, pEntry++) if (pEntry->lock != 0xff) return;
1077 /* Remove the table from the linked list and free it */
1079 TRACE("(%04x): freeing table %04x\n",
1081 *pTable = *(WORD *)pEntry;
1082 LOCAL_FreeArena( ds, ARENA_HEADER( table ) );
1086 /***********************************************************************
1089 * Implementation of LocalFree().
1091 HLOCAL16 LOCAL_Free( HANDLE16 ds, HLOCAL16 handle )
1093 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1095 TRACE("%04x ds=%04x\n", handle, ds );
1097 if (!handle) { WARN("Handle is 0.\n" ); return 0; }
1098 if (HANDLE_FIXED( handle ))
1100 if (!LOCAL_FreeArena( ds, ARENA_HEADER( handle ) )) return 0; /* OK */
1101 else return handle; /* couldn't free it */
1105 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1106 if (pEntry->flags != (LMEM_DISCARDED >> 8))
1108 TRACE("real block at %04x\n",
1110 if (LOCAL_FreeArena( ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX) ))
1111 return handle; /* couldn't free it */
1113 LOCAL_FreeHandleEntry( ds, handle );
1119 /***********************************************************************
1122 * Implementation of LocalAlloc().
1125 HLOCAL16 LOCAL_Alloc( HANDLE16 ds, WORD flags, WORD size )
1130 TRACE("%04x %d ds=%04x\n", flags, size, ds );
1132 if(size > 0 && size <= 4) size = 5;
1133 if (flags & LMEM_MOVEABLE)
1135 LOCALHANDLEENTRY *plhe;
1140 if (!(hmem = LOCAL_GetBlock( ds, size + MOVEABLE_PREFIX, flags )))
1143 else /* We just need to allocate a discarded handle */
1145 if (!(handle = LOCAL_GetNewHandleEntry( ds )))
1147 WARN("Couldn't get handle.\n");
1149 LOCAL_FreeArena( ds, ARENA_HEADER(hmem) );
1152 ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1153 plhe = (LOCALHANDLEENTRY *)(ptr + handle);
1157 plhe->addr = hmem + MOVEABLE_PREFIX;
1158 plhe->flags = (BYTE)((flags & 0x0f00) >> 8);
1159 *(HLOCAL16 *)(ptr + hmem) = handle;
1164 plhe->flags = LMEM_DISCARDED >> 8;
1171 handle = LOCAL_GetBlock( ds, size, flags );
1177 /***********************************************************************
1180 * Implementation of LocalReAlloc().
1182 HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
1184 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1185 LOCALHEAPINFO *pInfo;
1186 LOCALARENA *pArena, *pNext;
1187 LOCALHANDLEENTRY *pEntry = NULL;
1188 WORD arena, oldsize;
1189 HLOCAL16 hmem, blockhandle;
1192 if (!handle) return 0;
1193 if(HANDLE_MOVEABLE(handle) &&
1194 ((LOCALHANDLEENTRY *)(ptr + handle))->lock == 0xff) /* An unused handle */
1197 TRACE("%04x %d %04x ds=%04x\n",
1198 handle, size, flags, ds );
1199 if (!(pInfo = LOCAL_GetHeap( ds ))) return 0;
1201 if (HANDLE_FIXED( handle ))
1202 blockhandle = handle;
1205 pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
1206 if(pEntry->flags == (LMEM_DISCARDED >> 8))
1210 WARN("Dicarded block has non-zero addr.\n");
1211 TRACE("ReAllocating discarded block\n");
1212 if(size <= 4) size = 5;
1213 if (!(hl = LOCAL_GetBlock( ds, size + MOVEABLE_PREFIX, flags)))
1215 ptr = MapSL( MAKESEGPTR( ds, 0 ) ); /* Reload ptr */
1216 pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
1217 pEntry->addr = hl + MOVEABLE_PREFIX;
1220 *(HLOCAL16 *)(ptr + hl) = handle;
1223 if (((blockhandle = pEntry->addr - MOVEABLE_PREFIX) & 3) != 0)
1225 ERR("(%04x,%04x): invalid handle\n",
1229 if (*(HLOCAL16 *)(ptr + blockhandle) != handle) {
1230 ERR("Back ptr to handle is invalid\n");
1235 if (flags & LMEM_MODIFY)
1237 if (HANDLE_MOVEABLE(handle))
1239 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1240 pEntry->flags = (flags & 0x0f00) >> 8;
1241 TRACE("Changing flags to %x.\n", pEntry->flags);
1248 if (flags & LMEM_MOVEABLE)
1250 if (HANDLE_FIXED(handle))
1252 TRACE("Freeing fixed block.\n");
1253 return LOCAL_Free( ds, handle );
1255 else /* Moveable block */
1257 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1258 if (pEntry->lock == 0)
1260 /* discards moveable blocks */
1261 TRACE("Discarding block\n");
1262 LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX));
1264 pEntry->flags = (LMEM_DISCARDED >> 8);
1272 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1273 if (pEntry->lock == 0)
1276 return LOCAL_Free( ds, handle );
1282 arena = ARENA_HEADER( blockhandle );
1283 TRACE("arena is %04x\n", arena );
1284 pArena = ARENA_PTR( ptr, arena );
1286 if(size <= 4) size = 5;
1287 if(HANDLE_MOVEABLE(handle)) size += MOVEABLE_PREFIX;
1288 oldsize = pArena->next - arena - ARENA_HEADER_SIZE;
1289 nextarena = LALIGN(blockhandle + size);
1291 /* Check for size reduction */
1293 if (nextarena <= pArena->next)
1295 TRACE("size reduction, making new free block\n");
1296 LOCAL_ShrinkArena(ds, arena, nextarena - arena);
1297 TRACE("returning %04x\n", handle );
1301 /* Check if the next block is free and large enough */
1303 pNext = ARENA_PTR( ptr, pArena->next );
1304 if (((pNext->prev & 3) == LOCAL_ARENA_FREE) &&
1305 (nextarena <= pNext->next))
1307 TRACE("size increase, making new free block\n");
1308 LOCAL_GrowArenaUpward(ds, arena, nextarena - arena);
1309 TRACE("returning %04x\n", handle );
1313 /* Now we have to allocate a new block, but not if (fixed block or locked
1314 block) and no LMEM_MOVEABLE */
1316 if (!(flags & LMEM_MOVEABLE))
1318 if (HANDLE_FIXED(handle))
1320 ERR("Needed to move fixed block, but LMEM_MOVEABLE not specified.\n");
1325 if(((LOCALHANDLEENTRY *)(ptr + handle))->lock != 0)
1327 ERR("Needed to move locked block, but LMEM_MOVEABLE not specified.\n");
1333 hmem = LOCAL_GetBlock( ds, size, flags );
1334 ptr = MapSL( MAKESEGPTR( ds, 0 )); /* Reload ptr */
1335 if(HANDLE_MOVEABLE(handle)) /* LOCAL_GetBlock might have triggered */
1336 { /* a compaction, which might in turn have */
1337 blockhandle = pEntry->addr - MOVEABLE_PREFIX; /* moved the very block we are resizing */
1338 arena = ARENA_HEADER( blockhandle ); /* thus, we reload arena, too */
1342 /* Remove the block from the heap and try again */
1343 LPSTR buffer = HeapAlloc( GetProcessHeap(), 0, oldsize );
1344 if (!buffer) return 0;
1345 memcpy( buffer, ptr + arena + ARENA_HEADER_SIZE, oldsize );
1346 LOCAL_FreeArena( ds, arena );
1347 if (!(hmem = LOCAL_GetBlock( ds, size, flags )))
1349 if (!(hmem = LOCAL_GetBlock( ds, oldsize, flags )))
1351 ERR("Can't restore saved block\n" );
1352 HeapFree( GetProcessHeap(), 0, buffer );
1357 ptr = MapSL( MAKESEGPTR( ds, 0 ) ); /* Reload ptr */
1358 memcpy( ptr + hmem, buffer, oldsize );
1359 HeapFree( GetProcessHeap(), 0, buffer );
1363 memcpy( ptr + hmem, ptr + (arena + ARENA_HEADER_SIZE), oldsize );
1364 LOCAL_FreeArena( ds, arena );
1366 if (HANDLE_MOVEABLE( handle ))
1368 TRACE("fixing handle\n");
1369 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1370 pEntry->addr = hmem + MOVEABLE_PREFIX;
1371 /* Back ptr should still be correct */
1372 if(*(HLOCAL16 *)(ptr + hmem) != handle)
1373 ERR("back ptr is invalid.\n");
1376 if (size == oldsize) hmem = 0; /* Realloc failed */
1377 TRACE("returning %04x\n", hmem );
1382 /***********************************************************************
1383 * LOCAL_InternalLock
1385 static HLOCAL16 LOCAL_InternalLock( LPSTR heap, HLOCAL16 handle )
1387 HLOCAL16 old_handle = handle;
1389 if (HANDLE_MOVEABLE(handle))
1391 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(heap + handle);
1392 if (pEntry->flags == LMEM_DISCARDED) return 0;
1393 if (pEntry->lock < 0xfe) pEntry->lock++;
1394 handle = pEntry->addr;
1396 TRACE("%04x returning %04x\n",
1397 old_handle, handle );
1402 /***********************************************************************
1405 void *LOCAL_Lock( HANDLE16 ds, HLOCAL16 handle )
1407 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1408 return handle ? ptr + LOCAL_InternalLock( ptr, handle ) : NULL;
1412 /***********************************************************************
1415 BOOL16 LOCAL_Unlock( HANDLE16 ds, HLOCAL16 handle )
1417 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1419 TRACE("%04x\n", handle );
1420 if (HANDLE_MOVEABLE(handle))
1422 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1423 if (!pEntry->lock || (pEntry->lock == 0xff)) return FALSE;
1424 /* For moveable block, return the new lock count */
1425 /* (see _Windows_Internals_ p. 197) */
1426 return --pEntry->lock;
1432 /***********************************************************************
1435 * Implementation of LocalSize().
1437 WORD LOCAL_Size( HANDLE16 ds, HLOCAL16 handle )
1439 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1442 TRACE("%04x ds=%04x\n", handle, ds );
1444 if (!handle) return 0;
1445 if (HANDLE_MOVEABLE( handle ))
1447 handle = *(WORD *)(ptr + handle);
1448 if (!handle) return 0;
1449 pArena = ARENA_PTR( ptr, ARENA_HEADER(handle - MOVEABLE_PREFIX) );
1452 pArena = ARENA_PTR( ptr, ARENA_HEADER(handle) );
1454 return pArena->next - handle;
1458 /***********************************************************************
1461 * Implementation of LocalFlags().
1463 WORD LOCAL_Flags( HANDLE16 ds, HLOCAL16 handle )
1465 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1467 if (HANDLE_MOVEABLE(handle))
1469 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1470 TRACE("(%04x,%04x): returning %04x\n",
1471 ds, handle, pEntry->lock | (pEntry->flags << 8) );
1472 return pEntry->lock | (pEntry->flags << 8);
1476 TRACE("(%04x,%04x): returning 0\n",
1483 /***********************************************************************
1486 * Implementation of LocalHeapSize().
1488 WORD LOCAL_HeapSize( HANDLE16 ds )
1490 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
1491 if (!pInfo) return 0;
1492 return pInfo->last - pInfo->first;
1496 /***********************************************************************
1499 * Implementation of LocalCountFree().
1501 WORD LOCAL_CountFree( HANDLE16 ds )
1505 LOCALHEAPINFO *pInfo;
1506 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1508 if (!(pInfo = LOCAL_GetHeap( ds )))
1510 ERR("(%04x): Local heap not found\n", ds );
1511 LOCAL_PrintHeap( ds );
1516 arena = pInfo->first;
1517 pArena = ARENA_PTR( ptr, arena );
1520 arena = pArena->free_next;
1521 pArena = ARENA_PTR( ptr, arena );
1522 if (arena == pArena->free_next) break;
1523 total += pArena->size;
1525 TRACE("(%04x): returning %d\n", ds, total);
1530 /***********************************************************************
1533 * Implementation of LocalHandle().
1535 HLOCAL16 LOCAL_Handle( HANDLE16 ds, WORD addr )
1537 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1538 LOCALHEAPINFO *pInfo;
1541 if (!(pInfo = LOCAL_GetHeap( ds )))
1543 ERR("(%04x): Local heap not found\n", ds );
1544 LOCAL_PrintHeap( ds );
1548 /* Find the address in the entry tables */
1550 table = pInfo->htable;
1553 WORD count = *(WORD *)(ptr + table);
1554 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY*)(ptr+table+sizeof(WORD));
1555 for (; count > 0; count--, pEntry++)
1556 if (pEntry->addr == addr) return (HLOCAL16)((char *)pEntry - ptr);
1557 table = *(WORD *)pEntry;
1560 return (HLOCAL16)addr; /* Fixed block handle is addr */
1564 /***********************************************************************
1565 * LocalAlloc16 (KERNEL.5)
1567 HLOCAL16 WINAPI LocalAlloc16( UINT16 flags, WORD size )
1569 HLOCAL16 ret = LOCAL_Alloc( CURRENT_DS, flags, size );
1570 CURRENT_STACK16->ecx = ret; /* must be returned in cx too */
1575 /***********************************************************************
1576 * LocalReAlloc16 (KERNEL.6)
1578 HLOCAL16 WINAPI LocalReAlloc16( HLOCAL16 handle, WORD size, UINT16 flags )
1580 return LOCAL_ReAlloc( CURRENT_DS, handle, size, flags );
1584 /***********************************************************************
1585 * LocalFree16 (KERNEL.7)
1587 HLOCAL16 WINAPI LocalFree16( HLOCAL16 handle )
1589 return LOCAL_Free( CURRENT_DS, handle );
1593 /***********************************************************************
1594 * LocalLock16 (KERNEL.8)
1596 * Note: only the offset part of the pointer is returned by the relay code.
1598 SEGPTR WINAPI LocalLock16( HLOCAL16 handle )
1600 WORD ds = CURRENT_DS;
1601 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1602 return MAKESEGPTR( ds, LOCAL_InternalLock( ptr, handle ) );
1606 /***********************************************************************
1607 * LocalUnlock16 (KERNEL.9)
1609 BOOL16 WINAPI LocalUnlock16( HLOCAL16 handle )
1611 return LOCAL_Unlock( CURRENT_DS, handle );
1615 /***********************************************************************
1616 * LocalSize16 (KERNEL.10)
1618 UINT16 WINAPI LocalSize16( HLOCAL16 handle )
1620 return LOCAL_Size( CURRENT_DS, handle );
1624 /***********************************************************************
1625 * LocalHandle16 (KERNEL.11)
1627 HLOCAL16 WINAPI LocalHandle16( WORD addr )
1629 return LOCAL_Handle( CURRENT_DS, addr );
1633 /***********************************************************************
1634 * LocalFlags16 (KERNEL.12)
1636 UINT16 WINAPI LocalFlags16( HLOCAL16 handle )
1638 return LOCAL_Flags( CURRENT_DS, handle );
1642 /***********************************************************************
1643 * LocalCompact16 (KERNEL.13)
1645 UINT16 WINAPI LocalCompact16( UINT16 minfree )
1647 TRACE("%04x\n", minfree );
1648 return LOCAL_Compact( CURRENT_DS, minfree, 0 );
1652 /***********************************************************************
1653 * LocalNotify (KERNEL.14)
1655 * Installs a callback function that is called for local memory events
1656 * Callback function prototype is
1657 * BOOL16 NotifyFunc(WORD wMsg, HLOCAL16 hMem, WORD wArg)
1660 * NotifyFunc seems to be responsible for allocating some memory,
1661 * returns TRUE for success.
1662 * wArg = number of bytes needed additionally
1664 * hMem = handle; wArg = old mem location
1666 * NotifyFunc seems to be strongly encouraged to return TRUE,
1667 * otherwise LogError() gets called.
1668 * hMem = handle; wArg = flags
1670 FARPROC16 WINAPI LocalNotify16( FARPROC16 func )
1672 LOCALHEAPINFO *pInfo;
1673 FARPROC16 oldNotify;
1674 HANDLE16 ds = CURRENT_DS;
1676 if (!(pInfo = LOCAL_GetHeap( ds )))
1678 ERR("(%04x): Local heap not found\n", ds );
1679 LOCAL_PrintHeap( ds );
1682 TRACE("(%04x): %08lx\n", ds, (DWORD)func );
1683 FIXME("Half implemented\n");
1684 oldNotify = pInfo->notify;
1685 pInfo->notify = func;
1690 /***********************************************************************
1691 * LocalShrink16 (KERNEL.121)
1693 UINT16 WINAPI LocalShrink16( HGLOBAL16 handle, UINT16 newsize )
1695 TRACE("%04x %04x\n", handle, newsize );
1700 /***********************************************************************
1701 * GetHeapSpaces (KERNEL.138)
1703 DWORD WINAPI GetHeapSpaces16( HMODULE16 module )
1708 if (!(pModule = NE_GetPtr( module ))) return 0;
1710 GlobalHandleToSel16((NE_SEG_TABLE( pModule ) + pModule->dgroup - 1)->hSeg);
1711 return MAKELONG( LOCAL_CountFree( ds ), LOCAL_HeapSize( ds ) );
1715 /***********************************************************************
1716 * LocalCountFree (KERNEL.161)
1718 WORD WINAPI LocalCountFree16(void)
1720 return LOCAL_CountFree( CURRENT_DS );
1724 /***********************************************************************
1725 * LocalHeapSize (KERNEL.162)
1727 WORD WINAPI LocalHeapSize16(void)
1730 return LOCAL_HeapSize( CURRENT_DS );
1734 /***********************************************************************
1735 * LocalHandleDelta (KERNEL.310)
1737 WORD WINAPI LocalHandleDelta16( WORD delta )
1739 LOCALHEAPINFO *pInfo;
1741 if (!(pInfo = LOCAL_GetHeap( CURRENT_DS )))
1743 ERR("Local heap not found\n");
1744 LOCAL_PrintHeap( CURRENT_DS );
1747 if (delta) pInfo->hdelta = delta;
1748 TRACE("returning %04x\n", pInfo->hdelta);
1749 return pInfo->hdelta;
1753 /***********************************************************************
1754 * LocalInfo (TOOLHELP.56)
1756 BOOL16 WINAPI LocalInfo16( LOCALINFO *pLocalInfo, HGLOBAL16 handle )
1758 LOCALHEAPINFO *pInfo = LOCAL_GetHeap(SELECTOROF(K32WOWGlobalLock16(handle)));
1759 if (!pInfo) return FALSE;
1760 pLocalInfo->wcItems = pInfo->items;
1765 /***********************************************************************
1766 * LocalFirst (TOOLHELP.57)
1768 BOOL16 WINAPI LocalFirst16( LOCALENTRY *pLocalEntry, HGLOBAL16 handle )
1770 WORD ds = GlobalHandleToSel16( handle );
1771 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1772 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
1773 if (!pInfo) return FALSE;
1775 pLocalEntry->hHandle = pInfo->first + ARENA_HEADER_SIZE;
1776 pLocalEntry->wAddress = pLocalEntry->hHandle;
1777 pLocalEntry->wFlags = LF_FIXED;
1778 pLocalEntry->wcLock = 0;
1779 pLocalEntry->wType = LT_NORMAL;
1780 pLocalEntry->hHeap = handle;
1781 pLocalEntry->wHeapType = NORMAL_HEAP;
1782 pLocalEntry->wNext = ARENA_PTR(ptr,pInfo->first)->next;
1783 pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
1788 /***********************************************************************
1789 * LocalNext (TOOLHELP.58)
1791 BOOL16 WINAPI LocalNext16( LOCALENTRY *pLocalEntry )
1793 WORD ds = GlobalHandleToSel16( pLocalEntry->hHeap );
1794 char *ptr = MapSL( MAKESEGPTR( ds, 0 ) );
1797 if (!LOCAL_GetHeap( ds )) return FALSE;
1798 if (!pLocalEntry->wNext) return FALSE;
1799 pArena = ARENA_PTR( ptr, pLocalEntry->wNext );
1801 pLocalEntry->hHandle = pLocalEntry->wNext + ARENA_HEADER_SIZE;
1802 pLocalEntry->wAddress = pLocalEntry->hHandle;
1803 pLocalEntry->wFlags = (pArena->prev & 3) + 1;
1804 pLocalEntry->wcLock = 0;
1805 pLocalEntry->wType = LT_NORMAL;
1806 if (pArena->next != pLocalEntry->wNext) /* last one? */
1807 pLocalEntry->wNext = pArena->next;
1809 pLocalEntry->wNext = 0;
1810 pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
1815 /***********************************************************************
1816 * LocalAlloc (KERNEL32.@)
1821 HLOCAL WINAPI LocalAlloc(
1822 UINT flags, /* [in] Allocation attributes */
1823 DWORD size /* [in] Number of bytes to allocate */
1825 return (HLOCAL)GlobalAlloc( flags, size );
1829 /***********************************************************************
1830 * LocalCompact (KERNEL32.@)
1832 UINT WINAPI LocalCompact( UINT minfree )
1834 return 0; /* LocalCompact does nothing in Win32 */
1838 /***********************************************************************
1839 * LocalFlags (KERNEL32.@)
1841 * Value specifying allocation flags and lock count.
1842 * LMEM_INVALID_HANDLE: Failure
1844 UINT WINAPI LocalFlags(
1845 HLOCAL handle /* [in] Handle of memory object */
1847 return GlobalFlags( (HGLOBAL)handle );
1851 /***********************************************************************
1852 * LocalFree (KERNEL32.@)
1857 HLOCAL WINAPI LocalFree(
1858 HLOCAL handle /* [in] Handle of memory object */
1860 return (HLOCAL)GlobalFree( (HGLOBAL)handle );
1864 /***********************************************************************
1865 * LocalHandle (KERNEL32.@)
1870 HLOCAL WINAPI LocalHandle(
1871 LPCVOID ptr /* [in] Address of local memory object */
1873 return (HLOCAL)GlobalHandle( ptr );
1877 /***********************************************************************
1878 * LocalLock (KERNEL32.@)
1879 * Locks a local memory object and returns pointer to the first byte
1880 * of the memory block.
1886 LPVOID WINAPI LocalLock(
1887 HLOCAL handle /* [in] Address of local memory object */
1889 return GlobalLock( (HGLOBAL)handle );
1893 /***********************************************************************
1894 * LocalReAlloc (KERNEL32.@)
1899 HLOCAL WINAPI LocalReAlloc(
1900 HLOCAL handle, /* [in] Handle of memory object */
1901 DWORD size, /* [in] New size of block */
1902 UINT flags /* [in] How to reallocate object */
1904 return (HLOCAL)GlobalReAlloc( (HGLOBAL)handle, size, flags );
1908 /***********************************************************************
1909 * LocalShrink (KERNEL32.@)
1911 UINT WINAPI LocalShrink( HGLOBAL handle, UINT newsize )
1913 return 0; /* LocalShrink does nothing in Win32 */
1917 /***********************************************************************
1918 * LocalSize (KERNEL32.@)
1923 UINT WINAPI LocalSize(
1924 HLOCAL handle /* [in] Handle of memory object */
1926 return GlobalSize( (HGLOBAL)handle );
1930 /***********************************************************************
1931 * LocalUnlock (KERNEL32.@)
1933 * TRUE: Object is still locked
1934 * FALSE: Object is unlocked
1936 BOOL WINAPI LocalUnlock(
1937 HLOCAL handle /* [in] Handle of memory object */
1939 return GlobalUnlock( (HGLOBAL)handle );