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.
25 #include "stackframe.h"
32 WORD prev; /* Previous arena | arena type */
33 WORD next; /* Next arena */
34 /* Start of the memory block or free-list info */
35 WORD size; /* Size of the free block */
36 WORD free_prev; /* Previous free block */
37 WORD free_next; /* Next free block */
40 #define ARENA_HEADER_SIZE 4
41 #define ARENA_HEADER( handle) ( ((handle) & ~3) - ARENA_HEADER_SIZE)
43 /* Arena types (stored in 'prev' field of the arena) */
44 #define LOCAL_ARENA_FREE 0
45 #define LOCAL_ARENA_FIXED 1
47 /* Layout of a handle entry table
49 * WORD count of entries
50 * LOCALHANDLEENTRY[count] entries
51 * WORD near ptr to next table
55 WORD addr; /* Address of the MOVEABLE block */
56 BYTE flags; /* Flags for this block */
57 BYTE lock; /* Lock count */
61 * We make addr = 4n + 2 and set *((WORD *)addr - 1) = &addr like Windows does
62 * in case something actually relies on this.
63 * Note the ARENA_HEADER(addr) still produces the desired result ie. 4n - 4
65 * An unused handle has lock = flags = 0xff. In windows addr is that of next
66 * free handle, at the moment in wine we set it to 0.
68 * A discarded block's handle has lock = addr = 0 and flags = 0x40
69 * (LMEM_DISCARDED >> 8)
76 WORD check; /* 00 Heap checking flag */
77 WORD freeze; /* 02 Heap frozen flag */
78 WORD items; /* 04 Count of items on the heap */
79 WORD first; /* 06 First item of the heap */
80 WORD pad1; /* 08 Always 0 */
81 WORD last; /* 0a Last item of the heap */
82 WORD pad2; /* 0c Always 0 */
83 BYTE ncompact; /* 0e Compactions counter */
84 BYTE dislevel; /* 0f Discard level */
85 DWORD distotal; /* 10 Total bytes discarded */
86 WORD htable; /* 14 Pointer to handle table */
87 WORD hfree; /* 16 Pointer to free handle table */
88 WORD hdelta; /* 18 Delta to expand the handle table */
89 WORD expand; /* 1a Pointer to expand function (unused) */
90 WORD pstat; /* 1c Pointer to status structure (unused) */
91 FARPROC16 notify WINE_PACKED; /* 1e Pointer to LocalNotify() function */
92 WORD lock; /* 22 Lock count for the heap */
93 WORD extra; /* 24 Extra bytes to allocate when expanding */
94 WORD minsize; /* 26 Minimum size of the heap */
95 WORD magic; /* 28 Magic number */
100 #define LOCAL_HEAP_MAGIC 0x484c /* 'LH' */
102 WORD USER_HeapSel = 0; /* USER heap selector */
103 WORD GDI_HeapSel = 0; /* GDI heap selector */
105 /* All local heap allocations are aligned on 4-byte boundaries */
106 #define LALIGN(word) (((word) + 3) & ~3)
108 #define ARENA_PTR(ptr,arena) ((LOCALARENA *)((char*)(ptr)+(arena)))
109 #define ARENA_PREV(ptr,arena) (ARENA_PTR((ptr),(arena))->prev & ~3)
110 #define ARENA_NEXT(ptr,arena) (ARENA_PTR((ptr),(arena))->next)
111 #define ARENA_FLAGS(ptr,arena) (ARENA_PTR((ptr),(arena))->prev & 3)
113 /* determine whether the handle belongs to a fixed or a moveable block */
114 #define HANDLE_FIXED(handle) (((handle) & 3) == 0)
115 #define HANDLE_MOVEABLE(handle) (((handle) & 3) == 2)
117 /***********************************************************************
120 * Return a pointer to the local heap, making sure it exists.
122 static LOCALHEAPINFO *LOCAL_GetHeap( HANDLE16 ds )
124 LOCALHEAPINFO *pInfo;
125 INSTANCEDATA *ptr = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN( ds, 0 );
126 TRACE(local, "Heap at %p, %04x\n", ptr, ptr->heap );
127 if (!ptr || !ptr->heap) return NULL;
128 if (IsBadReadPtr16( (SEGPTR)MAKELONG(ptr->heap,ds), sizeof(LOCALHEAPINFO)))
130 pInfo = (LOCALHEAPINFO*)((char*)ptr + ptr->heap);
131 if (pInfo->magic != LOCAL_HEAP_MAGIC) return NULL;
136 /***********************************************************************
137 * LOCAL_MakeBlockFree
139 * Make a block free, inserting it in the free-list.
140 * 'block' is the handle of the block arena; 'baseptr' points to
141 * the beginning of the data segment containing the heap.
143 static void LOCAL_MakeBlockFree( char *baseptr, WORD block )
145 LOCALARENA *pArena, *pNext;
148 /* Mark the block as free */
150 pArena = ARENA_PTR( baseptr, block );
151 pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FREE;
152 pArena->size = pArena->next - block;
154 /* Find the next free block (last block is always free) */
159 pNext = ARENA_PTR( baseptr, next );
160 if ((pNext->prev & 3) == LOCAL_ARENA_FREE) break;
164 TRACE(local, "Local_MakeBlockFree %04x, next %04x\n", block, next );
165 /* Insert the free block in the free-list */
167 pArena->free_prev = pNext->free_prev;
168 pArena->free_next = next;
169 ARENA_PTR(baseptr,pNext->free_prev)->free_next = block;
170 pNext->free_prev = block;
174 /***********************************************************************
175 * LOCAL_RemoveFreeBlock
177 * Remove a block from the free-list.
178 * 'block' is the handle of the block arena; 'baseptr' points to
179 * the beginning of the data segment containing the heap.
181 static void LOCAL_RemoveFreeBlock( char *baseptr, WORD block )
183 /* Mark the block as fixed */
185 LOCALARENA *pArena = ARENA_PTR( baseptr, block );
186 pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FIXED;
188 /* Remove it from the list */
190 ARENA_PTR(baseptr,pArena->free_prev)->free_next = pArena->free_next;
191 ARENA_PTR(baseptr,pArena->free_next)->free_prev = pArena->free_prev;
195 /***********************************************************************
198 * Insert a new block in the heap.
199 * 'new' is the handle of the new block arena; 'baseptr' points to
200 * the beginning of the data segment containing the heap; 'prev' is
201 * the block before the new one.
203 static void LOCAL_AddBlock( char *baseptr, WORD prev, WORD new )
205 LOCALARENA *pPrev = ARENA_PTR( baseptr, prev );
206 LOCALARENA *pNew = ARENA_PTR( baseptr, new );
208 pNew->prev = (prev & ~3) | LOCAL_ARENA_FIXED;
209 pNew->next = pPrev->next;
210 ARENA_PTR(baseptr,pPrev->next)->prev &= 3;
211 ARENA_PTR(baseptr,pPrev->next)->prev |= new;
216 /***********************************************************************
219 * Remove a block from the heap.
220 * 'block' is the handle of the block arena; 'baseptr' points to
221 * the beginning of the data segment containing the heap.
223 static void LOCAL_RemoveBlock( char *baseptr, WORD block )
225 LOCALARENA *pArena, *pTmp;
227 /* Remove the block from the free-list */
229 TRACE(local, "Local_RemoveBlock\n");
230 pArena = ARENA_PTR( baseptr, block );
231 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
232 LOCAL_RemoveFreeBlock( baseptr, block );
234 /* If the previous block is free, expand its size */
236 pTmp = ARENA_PTR( baseptr, pArena->prev & ~3 );
237 if ((pTmp->prev & 3) == LOCAL_ARENA_FREE)
238 pTmp->size += pArena->next - block;
240 /* Remove the block from the linked list */
242 pTmp->next = pArena->next;
243 pTmp = ARENA_PTR( baseptr, pArena->next );
244 pTmp->prev = (pTmp->prev & 3) | (pArena->prev & ~3);
248 /***********************************************************************
251 static void LOCAL_PrintHeap( HANDLE16 ds )
254 LOCALHEAPINFO *pInfo;
257 /* FIXME - the test should be done when calling the function!
258 plus is not clear that we should print this info
259 only when TRACE_ON is on! */
260 if(!TRACE_ON(local)) return;
262 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
263 pInfo = LOCAL_GetHeap( ds );
267 DUMP( "Local Heap corrupted! ds=%04x\n", ds );
270 DUMP( "Local Heap ds=%04x first=%04x last=%04x items=%d\n",
271 ds, pInfo->first, pInfo->last, pInfo->items );
273 arena = pInfo->first;
276 LOCALARENA *pArena = ARENA_PTR(ptr,arena);
277 DUMP( " %04x: prev=%04x next=%04x type=%d\n", arena,
278 pArena->prev & ~3, pArena->next, pArena->prev & 3 );
279 if (arena == pInfo->first)
281 DUMP( " size=%d free_prev=%04x free_next=%04x\n",
282 pArena->size, pArena->free_prev, pArena->free_next );
284 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
286 DUMP( " size=%d free_prev=%04x free_next=%04x\n",
287 pArena->size, pArena->free_prev, pArena->free_next );
288 if (pArena->next == arena) break; /* last one */
289 if (ARENA_PTR(ptr,pArena->free_next)->free_prev != arena)
291 DUMP( "*** arena->free_next->free_prev != arena\n" );
295 if (pArena->next == arena)
297 DUMP( "*** last block is not marked free\n" );
300 if ((ARENA_PTR(ptr,pArena->next)->prev & ~3) != arena)
302 DUMP( "*** arena->next->prev != arena (%04x, %04x)\n",
303 pArena->next, ARENA_PTR(ptr,pArena->next)->prev);
306 arena = pArena->next;
311 /***********************************************************************
312 * LocalInit (KERNEL.4)
314 BOOL16 WINAPI LocalInit( HANDLE16 selector, WORD start, WORD end )
317 WORD heapInfoArena, freeArena, lastArena;
318 LOCALHEAPINFO *pHeapInfo;
319 LOCALARENA *pArena, *pFirstArena, *pLastArena;
322 /* The initial layout of the heap is: */
323 /* - first arena (FIXED) */
324 /* - heap info structure (FIXED) */
325 /* - large free block (FREE) */
326 /* - last arena (FREE) */
328 TRACE(local, "%04x %04x-%04x\n", selector, start, end);
329 if (!selector) selector = CURRENT_DS;
333 /* If TRACE_ON(heap) is set, the global heap blocks are */
334 /* cleared before use, so we can test for double initialization. */
335 if (LOCAL_GetHeap(selector))
337 ERR(local, "Heap %04x initialized twice.\n", selector);
338 LOCAL_PrintHeap(selector);
343 /* Check if the segment is the DGROUP of a module */
345 if ((pModule = NE_GetPtr( selector )))
347 SEGTABLEENTRY *pSeg = NE_SEG_TABLE( pModule ) + pModule->dgroup - 1;
348 if (pModule->dgroup && (GlobalHandleToSel(pSeg->hSeg) == selector))
350 /* We can't just use the simple method of using the value
351 * of minsize + stacksize, since there are programs that
352 * resize the data segment before calling InitTask(). So,
353 * we must put it at the end of the segment */
354 start = GlobalSize16( GlobalHandle16( selector ) );
357 TRACE(local," new start %04x, minstart: %04x\n", start, pSeg->minsize + pModule->stack_size);
361 ptr = PTR_SEG_OFF_TO_LIN( selector, 0 );
363 start = LALIGN( MAX( start, sizeof(INSTANCEDATA) ) );
364 heapInfoArena = LALIGN(start + sizeof(LOCALARENA) );
365 freeArena = LALIGN( heapInfoArena + ARENA_HEADER_SIZE
366 + sizeof(LOCALHEAPINFO) );
367 lastArena = (end - sizeof(LOCALARENA)) & ~3;
369 /* Make sure there's enough space. */
371 if (freeArena + sizeof(LOCALARENA) >= lastArena) return FALSE;
373 /* Initialise the first arena */
375 pFirstArena = ARENA_PTR( ptr, start );
376 pFirstArena->prev = start | LOCAL_ARENA_FIXED;
377 pFirstArena->next = heapInfoArena;
378 pFirstArena->size = LALIGN(sizeof(LOCALARENA));
379 pFirstArena->free_prev = start; /* this one */
380 pFirstArena->free_next = freeArena;
382 /* Initialise the arena of the heap info structure */
384 pArena = ARENA_PTR( ptr, heapInfoArena );
385 pArena->prev = start | LOCAL_ARENA_FIXED;
386 pArena->next = freeArena;
388 /* Initialise the heap info structure */
390 pHeapInfo = (LOCALHEAPINFO *) (ptr + heapInfoArena + ARENA_HEADER_SIZE );
391 memset( pHeapInfo, 0, sizeof(LOCALHEAPINFO) );
392 pHeapInfo->items = 4;
393 pHeapInfo->first = start;
394 pHeapInfo->last = lastArena;
395 pHeapInfo->htable = 0;
396 pHeapInfo->hdelta = 0x20;
397 pHeapInfo->extra = 0x200;
398 pHeapInfo->minsize = lastArena - freeArena;
399 pHeapInfo->magic = LOCAL_HEAP_MAGIC;
401 /* Initialise the large free block */
403 pArena = ARENA_PTR( ptr, freeArena );
404 pArena->prev = heapInfoArena | LOCAL_ARENA_FREE;
405 pArena->next = lastArena;
406 pArena->size = lastArena - freeArena;
407 pArena->free_prev = start;
408 pArena->free_next = lastArena;
410 /* Initialise the last block */
412 pLastArena = ARENA_PTR( ptr, lastArena );
413 pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
414 pLastArena->next = lastArena; /* this one */
415 pLastArena->size = LALIGN(sizeof(LOCALARENA));
416 pLastArena->free_prev = freeArena;
417 pLastArena->free_next = lastArena; /* this one */
419 /* Store the local heap address in the instance data */
421 ((INSTANCEDATA *)ptr)->heap = heapInfoArena + ARENA_HEADER_SIZE;
422 LOCAL_PrintHeap( selector );
426 /***********************************************************************
429 static void LOCAL_GrowHeap( HANDLE16 ds )
431 HANDLE16 hseg = GlobalHandle16( ds );
432 LONG oldsize = GlobalSize16( hseg );
434 LOCALHEAPINFO *pHeapInfo;
435 WORD freeArena, lastArena;
436 LOCALARENA *pArena, *pLastArena;
439 /* if nothing can be gained, return */
440 if (oldsize > 0xfff0) return;
441 hseg = GlobalReAlloc16( hseg, 0x10000, GMEM_FIXED );
442 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
443 pHeapInfo = LOCAL_GetHeap( ds );
444 if (pHeapInfo == NULL) {
445 ERR(local, "Heap not found\n" );
448 end = GlobalSize16( hseg );
449 lastArena = (end - sizeof(LOCALARENA)) & ~3;
451 /* Update the HeapInfo */
453 freeArena = pHeapInfo->last;
454 pHeapInfo->last = lastArena;
455 pHeapInfo->minsize += end - oldsize;
457 /* grow the old last block */
458 pArena = ARENA_PTR( ptr, freeArena );
459 pArena->size = lastArena - freeArena;
460 pArena->next = lastArena;
461 pArena->free_next = lastArena;
463 /* Initialise the new last block */
465 pLastArena = ARENA_PTR( ptr, lastArena );
466 pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
467 pLastArena->next = lastArena; /* this one */
468 pLastArena->size = LALIGN(sizeof(LOCALARENA));
469 pLastArena->free_prev = freeArena;
470 pLastArena->free_next = lastArena; /* this one */
472 /* If block before freeArena is also free then merge them */
473 if((ARENA_PTR(ptr, (pArena->prev & ~3))->prev & 3) == LOCAL_ARENA_FREE)
475 LOCAL_RemoveBlock(ptr, freeArena);
479 TRACE(local, "Heap expanded\n" );
480 LOCAL_PrintHeap( ds );
484 /***********************************************************************
487 static HLOCAL16 LOCAL_FreeArena( WORD ds, WORD arena )
489 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
490 LOCALHEAPINFO *pInfo;
491 LOCALARENA *pArena, *pPrev, *pNext;
493 TRACE(local, "%04x ds=%04x\n", arena, ds );
494 if (!(pInfo = LOCAL_GetHeap( ds ))) return arena;
496 pArena = ARENA_PTR( ptr, arena );
497 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
499 /* shouldn't happen */
500 ERR(local, "Trying to free block %04x twice!\n",
502 LOCAL_PrintHeap( ds );
506 /* Check if we can merge with the previous block */
508 pPrev = ARENA_PTR( ptr, pArena->prev & ~3 );
509 pNext = ARENA_PTR( ptr, pArena->next );
510 if ((pPrev->prev & 3) == LOCAL_ARENA_FREE)
512 arena = pArena->prev & ~3;
514 LOCAL_RemoveBlock( ptr, pPrev->next );
517 else /* Make a new free block */
519 LOCAL_MakeBlockFree( ptr, arena );
522 /* Check if we can merge with the next block */
524 if ((pArena->next == pArena->free_next) &&
525 (pArena->next != pInfo->last))
527 LOCAL_RemoveBlock( ptr, pArena->next );
534 /***********************************************************************
537 * Shrink an arena by creating a free block at its end if possible.
538 * 'size' includes the arena header, and must be aligned.
540 static void LOCAL_ShrinkArena( WORD ds, WORD arena, WORD size )
542 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
543 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
545 if (arena + size + LALIGN(sizeof(LOCALARENA)) < pArena->next)
547 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
549 LOCAL_AddBlock( ptr, arena, arena + size );
551 LOCAL_FreeArena( ds, arena + size );
556 /***********************************************************************
557 * LOCAL_GrowArenaDownward
559 * Grow an arena downward by using the previous arena (must be free).
561 static void LOCAL_GrowArenaDownward( WORD ds, WORD arena, WORD newsize )
563 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
564 LOCALHEAPINFO *pInfo;
565 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
566 WORD prevArena = pArena->prev & ~3;
567 LOCALARENA *pPrevArena = ARENA_PTR( ptr, prevArena );
571 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
572 offset = pPrevArena->size;
573 size = pArena->next - arena - ARENA_HEADER_SIZE;
574 LOCAL_RemoveFreeBlock( ptr, prevArena );
575 LOCAL_RemoveBlock( ptr, arena );
577 p = (char *)pPrevArena + ARENA_HEADER_SIZE;
578 while (offset < size)
580 memcpy( p, p + offset, offset );
584 if (size) memcpy( p, p + offset, size );
585 LOCAL_ShrinkArena( ds, prevArena, newsize );
590 /***********************************************************************
591 * LOCAL_GrowArenaUpward
593 * Grow an arena upward by using the next arena (must be free and big
594 * enough). Newsize includes the arena header and must be aligned.
596 static void LOCAL_GrowArenaUpward( WORD ds, WORD arena, WORD newsize )
598 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
599 LOCALHEAPINFO *pInfo;
600 LOCALARENA *pArena = ARENA_PTR( ptr, arena );
601 WORD nextArena = pArena->next;
603 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
604 LOCAL_RemoveBlock( ptr, nextArena );
606 LOCAL_ShrinkArena( ds, arena, newsize );
610 /***********************************************************************
613 static WORD LOCAL_GetFreeSpace(WORD ds, WORD countdiscard)
615 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
616 LOCALHEAPINFO *pInfo;
621 if (!(pInfo = LOCAL_GetHeap( ds )))
623 ERR(local, "Local heap not found\n" );
627 arena = pInfo->first;
628 pArena = ARENA_PTR( ptr, arena );
629 while (arena != pArena->free_next)
631 arena = pArena->free_next;
632 pArena = ARENA_PTR( ptr, arena );
633 if (pArena->size >= freespace) freespace = pArena->size;
635 /* FIXME doesn't yet calculate space that would become free if everything
636 were discarded when countdiscard == 1 */
637 if (freespace < ARENA_HEADER_SIZE) freespace = 0;
638 else freespace -= ARENA_HEADER_SIZE;
643 /***********************************************************************
646 WORD LOCAL_Compact( HANDLE16 ds, UINT16 minfree, UINT16 flags )
648 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
649 LOCALHEAPINFO *pInfo;
650 LOCALARENA *pArena, *pMoveArena, *pFinalArena;
651 WORD arena, movearena, finalarena, table;
652 WORD count, movesize, size;
654 LOCALHANDLEENTRY *pEntry;
656 if (!(pInfo = LOCAL_GetHeap( ds )))
658 ERR(local, "Local heap not found\n" );
662 TRACE(local, "ds = %04x, minfree = %04x, flags = %04x\n",
664 freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
665 if(freespace >= minfree || (flags & LMEM_NOCOMPACT))
667 TRACE(local, "Returning %04x.\n", freespace);
670 TRACE(local, "Compacting heap %04x.\n", ds);
671 table = pInfo->htable;
674 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
675 for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
677 if((pEntry->lock == 0) && (pEntry->flags != (LMEM_DISCARDED >> 8)))
679 /* OK we can move this one if we want */
680 TRACE(local, "handle %04x (block %04x) can be moved.\n",
681 (WORD)((char *)pEntry - ptr), pEntry->addr);
682 movearena = ARENA_HEADER(pEntry->addr);
683 pMoveArena = ARENA_PTR(ptr, movearena);
684 movesize = pMoveArena->next - movearena;
685 arena = pInfo->first;
686 pArena = ARENA_PTR(ptr, arena);
689 /* Try to find the smallest arena that will do, */
690 /* which is below us in memory */
693 arena = pArena->free_next;
694 pArena = ARENA_PTR(ptr, arena);
695 if(arena >= movearena)
697 if(arena == pArena->free_next)
699 if((pArena->size >= movesize) && (pArena->size < size))
705 if (finalarena) /* Actually got somewhere to move */
707 TRACE(local, "Moving it to %04x.\n", finalarena);
708 pFinalArena = ARENA_PTR(ptr, finalarena);
709 size = pFinalArena->size;
710 LOCAL_RemoveFreeBlock(ptr, finalarena);
711 LOCAL_ShrinkArena( ds, finalarena, movesize );
712 /* Copy the arena to it's new location */
713 memcpy((char *)pFinalArena + ARENA_HEADER_SIZE,
714 (char *)pMoveArena + ARENA_HEADER_SIZE,
715 movesize - ARENA_HEADER_SIZE );
716 /* Free the old location */
717 LOCAL_FreeArena(ds, movearena);
718 /* Update handle table entry */
719 pEntry->addr = finalarena + ARENA_HEADER_SIZE + sizeof(HLOCAL16) ;
721 else if((ARENA_PTR(ptr, pMoveArena->prev & ~3)->prev & 3)
724 /* Previous arena is free (but < movesize) */
725 /* so we can 'slide' movearena down into it */
726 finalarena = pMoveArena->prev & ~3;
727 LOCAL_GrowArenaDownward( ds, movearena, movesize );
728 /* Update handle table entry */
729 pEntry->addr = finalarena + ARENA_HEADER_SIZE + sizeof(HLOCAL16) ;
733 table = *(WORD *)pEntry;
735 freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
736 if(freespace >= minfree || (flags & LMEM_NODISCARD))
738 TRACE(local, "Returning %04x.\n", freespace);
742 table = pInfo->htable;
745 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
746 for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
748 if(pEntry->addr && pEntry->lock == 0 &&
749 (pEntry->flags & (LMEM_DISCARDABLE >> 8)))
751 TRACE(local, "Discarding handle %04x (block %04x).\n",
752 (char *)pEntry - ptr, pEntry->addr);
753 LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr));
755 pEntry->flags = (LMEM_DISCARDED >> 8);
756 /* Call localnotify proc */
759 table = *(WORD *)pEntry;
761 return LOCAL_Compact(ds, 0xffff, LMEM_NODISCARD);
765 /***********************************************************************
766 * LOCAL_FindFreeBlock
768 static HLOCAL16 LOCAL_FindFreeBlock( HANDLE16 ds, WORD size )
770 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
771 LOCALHEAPINFO *pInfo;
775 if (!(pInfo = LOCAL_GetHeap( ds )))
777 ERR(local, "Local heap not found\n" );
782 arena = pInfo->first;
783 pArena = ARENA_PTR( ptr, arena );
785 arena = pArena->free_next;
786 pArena = ARENA_PTR( ptr, arena );
787 if (arena == pArena->free_next) break;
788 if (pArena->size >= size) return arena;
790 ERR(local, "not enough space\n" );
795 /***********************************************************************
797 * The segment may get moved around in this function, so all callers
798 * should reset their pointer variables.
800 static HLOCAL16 LOCAL_GetBlock( HANDLE16 ds, WORD size, WORD flags )
802 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
803 LOCALHEAPINFO *pInfo;
807 if (!(pInfo = LOCAL_GetHeap( ds )))
809 ERR(local, "Local heap not found\n");
814 size += ARENA_HEADER_SIZE;
815 size = LALIGN( MAX( size, sizeof(LOCALARENA) ) );
817 /* Find a suitable free block */
818 arena = LOCAL_FindFreeBlock( ds, size );
820 /* no space: try to make some */
821 LOCAL_Compact( ds, size, flags );
822 arena = LOCAL_FindFreeBlock( ds, size );
825 /* still no space: try to grow the segment */
826 LOCAL_GrowHeap( ds );
827 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
828 pInfo = LOCAL_GetHeap( ds );
829 arena = LOCAL_FindFreeBlock( ds, size );
832 if (ds == GDI_HeapSel) {
833 WARN(local, "not enough space in GDI local heap "
834 "(%04x) for %d bytes\n", ds, size );
835 } else if (ds == USER_HeapSel) {
836 WARN(local, "not enough space in USER local heap "
837 "(%04x) for %d bytes\n", ds, size );
839 WARN(local, "not enough space in local heap "
840 "%04x for %d bytes\n", ds, size );
845 /* Make a block out of the free arena */
846 pArena = ARENA_PTR( ptr, arena );
847 TRACE(local, "LOCAL_GetBlock size = %04x, arena %04x size %04x\n",
848 size, arena, pArena->size );
849 LOCAL_RemoveFreeBlock( ptr, arena );
850 LOCAL_ShrinkArena( ds, arena, size );
852 if (flags & LMEM_ZEROINIT)
853 memset((char *)pArena + ARENA_HEADER_SIZE, 0, size-ARENA_HEADER_SIZE);
854 return arena + ARENA_HEADER_SIZE;
858 /***********************************************************************
861 static BOOL16 LOCAL_NewHTable( HANDLE16 ds )
863 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
864 LOCALHEAPINFO *pInfo;
865 LOCALHANDLEENTRY *pEntry;
869 TRACE(local, "Local_NewHTable\n" );
870 if (!(pInfo = LOCAL_GetHeap( ds )))
872 ERR(local, "Local heap not found\n");
877 if (!(handle = LOCAL_GetBlock( ds, pInfo->hdelta * sizeof(LOCALHANDLEENTRY)
878 + 2 * sizeof(WORD), LMEM_FIXED )))
880 if (!(ptr = PTR_SEG_OFF_TO_LIN( ds, 0 )))
881 ERR(local, "ptr == NULL after GetBlock.\n");
882 if (!(pInfo = LOCAL_GetHeap( ds )))
883 ERR(local,"pInfo == NULL after GetBlock.\n");
885 /* Fill the entry table */
887 *(WORD *)(ptr + handle) = pInfo->hdelta;
888 pEntry = (LOCALHANDLEENTRY *)(ptr + handle + sizeof(WORD));
889 for (i = pInfo->hdelta; i > 0; i--, pEntry++) {
890 pEntry->lock = pEntry->flags = 0xff;
893 *(WORD *)pEntry = pInfo->htable;
894 pInfo->htable = handle;
899 /***********************************************************************
900 * LOCAL_GetNewHandleEntry
902 static HLOCAL16 LOCAL_GetNewHandleEntry( HANDLE16 ds )
904 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
905 LOCALHEAPINFO *pInfo;
906 LOCALHANDLEENTRY *pEntry = NULL;
909 if (!(pInfo = LOCAL_GetHeap( ds )))
911 ERR(local, "Local heap not found\n");
916 /* Find a free slot in existing tables */
918 table = pInfo->htable;
921 WORD count = *(WORD *)(ptr + table);
922 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
923 for (; count > 0; count--, pEntry++)
924 if (pEntry->lock == 0xff) break;
926 table = *(WORD *)pEntry;
929 if (!table) /* We need to create a new table */
931 if (!LOCAL_NewHTable( ds )) return 0;
932 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
933 pInfo = LOCAL_GetHeap( ds );
934 pEntry = (LOCALHANDLEENTRY *)(ptr + pInfo->htable + sizeof(WORD));
937 /* Now allocate this entry */
941 TRACE(local, "(%04x): %04x\n",
942 ds, ((char *)pEntry - ptr) );
943 return (HLOCAL16)((char *)pEntry - ptr);
947 /***********************************************************************
948 * LOCAL_FreeHandleEntry
950 * Free a handle table entry.
952 static void LOCAL_FreeHandleEntry( HANDLE16 ds, HLOCAL16 handle )
954 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
955 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
956 LOCALHEAPINFO *pInfo;
958 WORD table, count, i;
960 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
962 /* Find the table where this handle comes from */
964 pTable = &pInfo->htable;
967 WORD size = (*(WORD *)(ptr + *pTable)) * sizeof(LOCALHANDLEENTRY);
968 if ((handle >= *pTable + sizeof(WORD)) &&
969 (handle < *pTable + sizeof(WORD) + size)) break; /* Found it */
970 pTable = (WORD *)(ptr + *pTable + sizeof(WORD) + size);
974 ERR(local, "Invalid entry %04x\n", handle);
975 LOCAL_PrintHeap( ds );
979 /* Make the entry free */
981 pEntry->addr = 0; /* just in case */
983 pEntry->flags = 0xff;
984 /* Now check if all entries in this table are free */
987 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
988 count = *(WORD *)(ptr + table);
989 for (i = count; i > 0; i--, pEntry++) if (pEntry->lock != 0xff) return;
991 /* Remove the table from the linked list and free it */
993 TRACE(local, "(%04x): freeing table %04x\n",
995 *pTable = *(WORD *)pEntry;
996 LOCAL_FreeArena( ds, ARENA_HEADER( table ) );
1000 /***********************************************************************
1003 * Implementation of LocalFree().
1005 HLOCAL16 LOCAL_Free( HANDLE16 ds, HLOCAL16 handle )
1007 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1009 TRACE(local, "%04x ds=%04x\n", handle, ds );
1011 if (!handle) { WARN(local, "Handle is 0.\n" ); return 0; }
1012 if (HANDLE_FIXED( handle ))
1014 if (!LOCAL_FreeArena( ds, ARENA_HEADER( handle ) )) return 0; /* OK */
1015 else return handle; /* couldn't free it */
1019 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1020 if (pEntry->flags != (LMEM_DISCARDED >> 8))
1022 TRACE(local, "real block at %04x\n",
1024 if (LOCAL_FreeArena( ds, ARENA_HEADER(pEntry->addr) ))
1025 return handle; /* couldn't free it */
1027 LOCAL_FreeHandleEntry( ds, handle );
1033 /***********************************************************************
1036 * Implementation of LocalAlloc().
1039 HLOCAL16 LOCAL_Alloc( HANDLE16 ds, WORD flags, WORD size )
1044 TRACE(local, "%04x %d ds=%04x\n", flags, size, ds );
1046 if(size > 0 && size <= 4) size = 5;
1047 if (flags & LMEM_MOVEABLE)
1049 LOCALHANDLEENTRY *plhe;
1054 if (!(hmem = LOCAL_GetBlock( ds, size + sizeof(HLOCAL16), flags )))
1057 else /* We just need to allocate a discarded handle */
1059 if (!(handle = LOCAL_GetNewHandleEntry( ds )))
1061 WARN(local, "Couldn't get handle.\n");
1063 LOCAL_FreeArena( ds, ARENA_HEADER(hmem) );
1066 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1067 plhe = (LOCALHANDLEENTRY *)(ptr + handle);
1071 plhe->addr = hmem + sizeof(HLOCAL16);
1072 plhe->flags = (BYTE)((flags & 0x0f00) >> 8);
1073 *(HLOCAL16 *)(ptr + hmem) = handle;
1078 plhe->flags = LMEM_DISCARDED >> 8;
1085 handle = LOCAL_GetBlock( ds, size, flags );
1091 /***********************************************************************
1094 * Implementation of LocalReAlloc().
1096 HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
1098 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1099 LOCALHEAPINFO *pInfo;
1100 LOCALARENA *pArena, *pNext;
1101 LOCALHANDLEENTRY *pEntry = NULL;
1102 WORD arena, oldsize;
1103 HLOCAL16 hmem, blockhandle;
1106 if (!handle) return 0;
1107 if(HANDLE_MOVEABLE(handle) &&
1108 ((LOCALHANDLEENTRY *)(ptr + handle))->lock == 0xff) /* An unused handle */
1111 TRACE(local, "%04x %d %04x ds=%04x\n",
1112 handle, size, flags, ds );
1113 if (!(pInfo = LOCAL_GetHeap( ds ))) return 0;
1115 if (HANDLE_FIXED( handle ))
1116 blockhandle = handle;
1119 pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
1120 if(pEntry->flags == (LMEM_DISCARDED >> 8))
1124 WARN(local,"Dicarded block has non-zero addr.\n");
1125 TRACE(local, "ReAllocating discarded block\n");
1126 if(size <= 4) size = 5;
1127 if (!(hl = LOCAL_GetBlock( ds, size + sizeof(HLOCAL16), flags)))
1129 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
1130 pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
1131 pEntry->addr = hl + sizeof(HLOCAL16);
1134 *(HLOCAL16 *)(ptr + hl) = handle;
1137 if (((blockhandle = pEntry->addr) & 3) != 2)
1139 ERR(local, "(%04x,%04x): invalid handle\n",
1143 if(*((HLOCAL16 *)(ptr + blockhandle) - 1) != handle) {
1144 ERR(local, "Back ptr to handle is invalid\n");
1149 if (flags & LMEM_MODIFY)
1151 if (HANDLE_MOVEABLE(handle))
1153 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1154 pEntry->flags = (flags & 0x0f00) >> 8;
1155 TRACE(local, "Changing flags to %x.\n", pEntry->flags);
1162 if (flags & LMEM_MOVEABLE)
1164 if (HANDLE_FIXED(handle))
1166 TRACE(local, "Freeing fixed block.\n");
1167 return LOCAL_Free( ds, handle );
1169 else /* Moveable block */
1171 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1172 if (pEntry->lock == 0)
1174 /* discards moveable blocks */
1175 TRACE(local,"Discarding block\n");
1176 LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr));
1178 pEntry->flags = (LMEM_DISCARDED >> 8);
1186 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1187 if (pEntry->lock == 0)
1190 return LOCAL_Free( ds, handle );
1196 arena = ARENA_HEADER( blockhandle );
1197 TRACE(local, "arena is %04x\n", arena );
1198 pArena = ARENA_PTR( ptr, arena );
1200 if(size <= 4) size = 5;
1201 oldsize = pArena->next - arena - ARENA_HEADER_SIZE;
1202 nextarena = LALIGN(blockhandle + size);
1204 /* Check for size reduction */
1206 if (nextarena <= pArena->next)
1208 TRACE(local, "size reduction, making new free block\n");
1209 LOCAL_ShrinkArena(ds, arena, nextarena - arena);
1210 TRACE(local, "returning %04x\n", handle );
1214 /* Check if the next block is free and large enough */
1216 pNext = ARENA_PTR( ptr, pArena->next );
1217 if (((pNext->prev & 3) == LOCAL_ARENA_FREE) &&
1218 (nextarena <= pNext->next))
1220 TRACE(local, "size increase, making new free block\n");
1221 LOCAL_GrowArenaUpward(ds, arena, nextarena - arena);
1222 TRACE(local, "returning %04x\n", handle );
1226 /* Now we have to allocate a new block, but not if (fixed block or locked
1227 block) and no LMEM_MOVEABLE */
1229 if (!(flags & LMEM_MOVEABLE))
1231 if (HANDLE_FIXED(handle))
1233 ERR(local, "Needed to move fixed block, but LMEM_MOVEABLE not specified.\n");
1238 if(((LOCALHANDLEENTRY *)(ptr + handle))->lock != 0)
1240 ERR(local, "Needed to move locked block, but LMEM_MOVEABLE not specified.\n");
1245 if(HANDLE_MOVEABLE(handle)) size += sizeof(HLOCAL16);
1246 hmem = LOCAL_GetBlock( ds, size, flags );
1247 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
1248 if(HANDLE_MOVEABLE(handle)) /* LOCAL_GetBlock might have triggered */
1249 { /* a compaction, which might in turn have */
1250 blockhandle = pEntry->addr ; /* moved the very block we are resizing */
1251 arena = ARENA_HEADER( blockhandle ); /* thus, we reload arena, too */
1255 /* Remove the block from the heap and try again */
1256 LPSTR buffer = HeapAlloc( GetProcessHeap(), 0, oldsize );
1257 if (!buffer) return 0;
1258 memcpy( buffer, ptr + arena + ARENA_HEADER_SIZE, oldsize );
1259 LOCAL_FreeArena( ds, arena );
1260 if (!(hmem = LOCAL_GetBlock( ds, size, flags )))
1262 if (!(hmem = LOCAL_GetBlock( ds, oldsize, flags )))
1264 ERR(local, "Can't restore saved block\n" );
1265 HeapFree( GetProcessHeap(), 0, buffer );
1270 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
1271 memcpy( ptr + hmem, buffer, oldsize );
1272 HeapFree( GetProcessHeap(), 0, buffer );
1276 memcpy( ptr + hmem, ptr + (arena + ARENA_HEADER_SIZE), oldsize );
1277 LOCAL_FreeArena( ds, arena );
1279 if (HANDLE_MOVEABLE( handle ))
1281 TRACE(local, "fixing handle\n");
1282 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1283 pEntry->addr = hmem + sizeof(HLOCAL16);
1284 /* Back ptr should still be correct */
1285 if(*(HLOCAL16 *)(ptr + hmem) != handle)
1286 ERR(local, "back ptr is invalid.\n");
1289 if (size == oldsize) hmem = 0; /* Realloc failed */
1290 TRACE(local, "returning %04x\n", hmem );
1295 /***********************************************************************
1296 * LOCAL_InternalLock
1298 static HLOCAL16 LOCAL_InternalLock( LPSTR heap, HLOCAL16 handle )
1300 HLOCAL16 old_handle = handle;
1302 if (HANDLE_MOVEABLE(handle))
1304 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(heap + handle);
1305 if (pEntry->flags == LMEM_DISCARDED) return 0;
1306 if (pEntry->lock < 0xfe) pEntry->lock++;
1307 handle = pEntry->addr;
1309 TRACE(local, "%04x returning %04x\n",
1310 old_handle, handle );
1315 /***********************************************************************
1318 LPSTR LOCAL_Lock( HANDLE16 ds, HLOCAL16 handle )
1320 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1321 return handle ? ptr + LOCAL_InternalLock( ptr, handle ) : NULL;
1325 /***********************************************************************
1328 SEGPTR LOCAL_LockSegptr( HANDLE16 ds, HLOCAL16 handle )
1330 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1331 return PTR_SEG_OFF_TO_SEGPTR( ds, LOCAL_InternalLock( ptr, handle ) );
1335 /***********************************************************************
1338 BOOL16 LOCAL_Unlock( HANDLE16 ds, HLOCAL16 handle )
1340 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1342 TRACE(local, "%04x\n", handle );
1343 if (HANDLE_MOVEABLE(handle))
1345 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1346 if (!pEntry->lock || (pEntry->lock == 0xff)) return FALSE;
1347 /* For moveable block, return the new lock count */
1348 /* (see _Windows_Internals_ p. 197) */
1349 return --pEntry->lock;
1355 /***********************************************************************
1358 * Implementation of LocalSize().
1360 WORD LOCAL_Size( HANDLE16 ds, HLOCAL16 handle )
1362 char *ptr = PTR_SEG_OFF_TO_LIN( CURRENT_DS, 0 );
1365 TRACE(local, "%04x ds=%04x\n", handle, ds );
1367 if (HANDLE_MOVEABLE( handle )) handle = *(WORD *)(ptr + handle);
1368 if (!handle) return 0;
1369 pArena = ARENA_PTR( ptr, ARENA_HEADER(handle) );
1370 return pArena->next - handle;
1374 /***********************************************************************
1377 * Implementation of LocalFlags().
1379 WORD LOCAL_Flags( HANDLE16 ds, HLOCAL16 handle )
1381 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1383 if (HANDLE_MOVEABLE(handle))
1385 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1386 TRACE(local, "(%04x,%04x): returning %04x\n",
1387 ds, handle, pEntry->lock | (pEntry->flags << 8) );
1388 return pEntry->lock | (pEntry->flags << 8);
1392 TRACE(local, "(%04x,%04x): returning 0\n",
1399 /***********************************************************************
1402 * Implementation of LocalHeapSize().
1404 WORD LOCAL_HeapSize( HANDLE16 ds )
1406 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
1407 if (!pInfo) return 0;
1408 return pInfo->last - pInfo->first;
1412 /***********************************************************************
1415 * Implementation of LocalCountFree().
1417 WORD LOCAL_CountFree( HANDLE16 ds )
1421 LOCALHEAPINFO *pInfo;
1422 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1424 if (!(pInfo = LOCAL_GetHeap( ds )))
1426 ERR(local, "(%04x): Local heap not found\n", ds );
1427 LOCAL_PrintHeap( ds );
1432 arena = pInfo->first;
1433 pArena = ARENA_PTR( ptr, arena );
1436 arena = pArena->free_next;
1437 pArena = ARENA_PTR( ptr, arena );
1438 if (arena == pArena->free_next) break;
1439 total += pArena->size;
1441 TRACE(local, "(%04x): returning %d\n", ds, total);
1446 /***********************************************************************
1449 * Implementation of LocalHandle().
1451 HLOCAL16 LOCAL_Handle( HANDLE16 ds, WORD addr )
1453 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1454 LOCALHEAPINFO *pInfo;
1457 if (!(pInfo = LOCAL_GetHeap( ds )))
1459 ERR(local, "(%04x): Local heap not found\n", ds );
1460 LOCAL_PrintHeap( ds );
1464 /* Find the address in the entry tables */
1466 table = pInfo->htable;
1469 WORD count = *(WORD *)(ptr + table);
1470 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY*)(ptr+table+sizeof(WORD));
1471 for (; count > 0; count--, pEntry++)
1472 if (pEntry->addr == addr) return (HLOCAL16)((char *)pEntry - ptr);
1473 table = *(WORD *)pEntry;
1476 return (HLOCAL16)addr; /* Fixed block handle is addr */
1480 /***********************************************************************
1481 * LocalAlloc16 (KERNEL.5)
1483 HLOCAL16 WINAPI LocalAlloc16( UINT16 flags, WORD size )
1485 return LOCAL_Alloc( CURRENT_DS, flags, size );
1489 /***********************************************************************
1490 * LocalReAlloc16 (KERNEL.6)
1492 HLOCAL16 WINAPI LocalReAlloc16( HLOCAL16 handle, WORD size, UINT16 flags )
1494 return LOCAL_ReAlloc( CURRENT_DS, handle, size, flags );
1498 /***********************************************************************
1499 * LocalFree16 (KERNEL.7)
1501 HLOCAL16 WINAPI LocalFree16( HLOCAL16 handle )
1503 return LOCAL_Free( CURRENT_DS, handle );
1507 /***********************************************************************
1508 * LocalLock16 (KERNEL.8)
1510 * Note: only the offset part of the pointer is returned by the relay code.
1512 SEGPTR WINAPI LocalLock16( HLOCAL16 handle )
1514 return LOCAL_LockSegptr( CURRENT_DS, handle );
1518 /***********************************************************************
1519 * LocalUnlock16 (KERNEL.9)
1521 BOOL16 WINAPI LocalUnlock16( HLOCAL16 handle )
1523 return LOCAL_Unlock( CURRENT_DS, handle );
1527 /***********************************************************************
1528 * LocalSize16 (KERNEL.10)
1530 UINT16 WINAPI LocalSize16( HLOCAL16 handle )
1532 return LOCAL_Size( CURRENT_DS, handle );
1536 /***********************************************************************
1537 * LocalHandle16 (KERNEL.11)
1539 HLOCAL16 WINAPI LocalHandle16( WORD addr )
1541 return LOCAL_Handle( CURRENT_DS, addr );
1545 /***********************************************************************
1546 * LocalFlags16 (KERNEL.12)
1548 UINT16 WINAPI LocalFlags16( HLOCAL16 handle )
1550 return LOCAL_Flags( CURRENT_DS, handle );
1554 /***********************************************************************
1555 * LocalCompact16 (KERNEL.13)
1557 UINT16 WINAPI LocalCompact16( UINT16 minfree )
1559 TRACE(local, "%04x\n", minfree );
1560 return LOCAL_Compact( CURRENT_DS, minfree, 0 );
1564 /***********************************************************************
1565 * LocalNotify (KERNEL.14)
1567 FARPROC16 WINAPI LocalNotify( FARPROC16 func )
1569 LOCALHEAPINFO *pInfo;
1570 FARPROC16 oldNotify;
1571 HANDLE16 ds = CURRENT_DS;
1573 if (!(pInfo = LOCAL_GetHeap( ds )))
1575 ERR(local, "(%04x): Local heap not found\n", ds );
1576 LOCAL_PrintHeap( ds );
1579 TRACE(local, "(%04x): %08lx\n", ds, (DWORD)func );
1580 FIXME(local, "Half implemented\n");
1581 oldNotify = pInfo->notify;
1582 pInfo->notify = func;
1587 /***********************************************************************
1588 * LocalShrink16 (KERNEL.121)
1590 UINT16 WINAPI LocalShrink16( HGLOBAL16 handle, UINT16 newsize )
1592 TRACE(local, "%04x %04x\n", handle, newsize );
1597 /***********************************************************************
1598 * GetHeapSpaces (KERNEL.138)
1600 DWORD WINAPI GetHeapSpaces( HMODULE16 module )
1605 if (!(pModule = NE_GetPtr( module ))) return 0;
1607 GlobalHandleToSel((NE_SEG_TABLE( pModule ) + pModule->dgroup - 1)->hSeg);
1608 return MAKELONG( LOCAL_CountFree( ds ), LOCAL_HeapSize( ds ) );
1612 /***********************************************************************
1613 * LocalCountFree (KERNEL.161)
1615 WORD WINAPI LocalCountFree(void)
1617 return LOCAL_CountFree( CURRENT_DS );
1621 /***********************************************************************
1622 * LocalHeapSize (KERNEL.162)
1624 WORD WINAPI LocalHeapSize(void)
1626 TRACE(local, "(void)\n" );
1627 return LOCAL_HeapSize( CURRENT_DS );
1631 /***********************************************************************
1632 * LocalHandleDelta (KERNEL.310)
1634 WORD WINAPI LocalHandleDelta( WORD delta )
1636 LOCALHEAPINFO *pInfo;
1638 if (!(pInfo = LOCAL_GetHeap( CURRENT_DS )))
1640 ERR(local, "Local heap not found\n");
1641 LOCAL_PrintHeap( CURRENT_DS );
1644 if (delta) pInfo->hdelta = delta;
1645 TRACE(local, "returning %04x\n", pInfo->hdelta);
1646 return pInfo->hdelta;
1650 /***********************************************************************
1651 * LocalInfo (TOOLHELP.56)
1653 BOOL16 WINAPI LocalInfo( LOCALINFO *pLocalInfo, HGLOBAL16 handle )
1655 LOCALHEAPINFO *pInfo = LOCAL_GetHeap(SELECTOROF(WIN16_GlobalLock16(handle)));
1656 if (!pInfo) return FALSE;
1657 pLocalInfo->wcItems = pInfo->items;
1662 /***********************************************************************
1663 * LocalFirst (TOOLHELP.57)
1665 BOOL16 WINAPI LocalFirst( LOCALENTRY *pLocalEntry, HGLOBAL16 handle )
1667 WORD ds = GlobalHandleToSel( handle );
1668 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1669 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
1670 if (!pInfo) return FALSE;
1672 pLocalEntry->hHandle = pInfo->first + ARENA_HEADER_SIZE;
1673 pLocalEntry->wAddress = pLocalEntry->hHandle;
1674 pLocalEntry->wFlags = LF_FIXED;
1675 pLocalEntry->wcLock = 0;
1676 pLocalEntry->wType = LT_NORMAL;
1677 pLocalEntry->hHeap = handle;
1678 pLocalEntry->wHeapType = NORMAL_HEAP;
1679 pLocalEntry->wNext = ARENA_PTR(ptr,pInfo->first)->next;
1680 pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
1685 /***********************************************************************
1686 * LocalNext (TOOLHELP.58)
1688 BOOL16 WINAPI LocalNext( LOCALENTRY *pLocalEntry )
1690 WORD ds = GlobalHandleToSel( pLocalEntry->hHeap );
1691 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1694 if (!LOCAL_GetHeap( ds )) return FALSE;
1695 if (!pLocalEntry->wNext) return FALSE;
1696 pArena = ARENA_PTR( ptr, pLocalEntry->wNext );
1698 pLocalEntry->hHandle = pLocalEntry->wNext + ARENA_HEADER_SIZE;
1699 pLocalEntry->wAddress = pLocalEntry->hHandle;
1700 pLocalEntry->wFlags = (pArena->prev & 3) + 1;
1701 pLocalEntry->wcLock = 0;
1702 pLocalEntry->wType = LT_NORMAL;
1703 if (pArena->next != pLocalEntry->wNext) /* last one? */
1704 pLocalEntry->wNext = pArena->next;
1706 pLocalEntry->wNext = 0;
1707 pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
1712 /***********************************************************************
1713 * LocalAlloc32 (KERNEL32.371)
1718 HLOCAL32 WINAPI LocalAlloc32(
1719 UINT32 flags, /* [in] Allocation attributes */
1720 DWORD size /* [in] Number of bytes to allocate */
1722 return (HLOCAL32)GlobalAlloc32( flags, size );
1726 /***********************************************************************
1727 * LocalCompact32 (KERNEL32.372)
1729 UINT32 WINAPI LocalCompact32( UINT32 minfree )
1731 return 0; /* LocalCompact does nothing in Win32 */
1735 /***********************************************************************
1736 * LocalFlags32 (KERNEL32.374)
1738 * Value specifying allocation flags and lock count.
1739 * LMEM_INVALID_HANDLE: Failure
1741 UINT32 WINAPI LocalFlags32(
1742 HLOCAL32 handle /* [in] Handle of memory object */
1744 return GlobalFlags32( (HGLOBAL32)handle );
1748 /***********************************************************************
1749 * LocalFree32 (KERNEL32.375)
1754 HLOCAL32 WINAPI LocalFree32(
1755 HLOCAL32 handle /* [in] Handle of memory object */
1757 return (HLOCAL32)GlobalFree32( (HGLOBAL32)handle );
1761 /***********************************************************************
1762 * LocalHandle32 (KERNEL32.376)
1767 HLOCAL32 WINAPI LocalHandle32(
1768 LPCVOID ptr /* [in] Address of local memory object */
1770 return (HLOCAL32)GlobalHandle32( ptr );
1774 /***********************************************************************
1775 * LocalLock32 (KERNEL32.377)
1776 * Locks a local memory object and returns pointer to the first byte
1777 * of the memory block.
1783 LPVOID WINAPI LocalLock32(
1784 HLOCAL32 handle /* [in] Address of local memory object */
1786 return GlobalLock32( (HGLOBAL32)handle );
1790 /***********************************************************************
1791 * LocalReAlloc32 (KERNEL32.378)
1796 HLOCAL32 WINAPI LocalReAlloc32(
1797 HLOCAL32 handle, /* [in] Handle of memory object */
1798 DWORD size, /* [in] New size of block */
1799 UINT32 flags /* [in] How to reallocate object */
1801 return (HLOCAL32)GlobalReAlloc32( (HGLOBAL32)handle, size, flags );
1805 /***********************************************************************
1806 * LocalShrink32 (KERNEL32.379)
1808 UINT32 WINAPI LocalShrink32( HGLOBAL32 handle, UINT32 newsize )
1810 return 0; /* LocalShrink does nothing in Win32 */
1814 /***********************************************************************
1815 * LocalSize32 (KERNEL32.380)
1820 UINT32 WINAPI LocalSize32(
1821 HLOCAL32 handle /* [in] Handle of memory object */
1823 return GlobalSize32( (HGLOBAL32)handle );
1827 /***********************************************************************
1828 * LocalUnlock32 (KERNEL32.381)
1830 * TRUE: Object is still locked
1831 * FALSE: Object is unlocked
1833 BOOL32 WINAPI LocalUnlock32(
1834 HLOCAL32 handle /* [in] Handle of memory object */
1836 return GlobalUnlock32( (HGLOBAL32)handle );