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Release 960506
[wine.git] / memory / local.c
blob38cb3ea273ff8042a85e55c92cf1b8c661b60cec
1 /*
2 * Local heap functions
3 *
4 * Copyright 1995 Alexandre Julliard
5 * Copyright 1996 Huw Davies
6 */
7
8 /*
9 * Note:
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.
13 */
14
15 #include <stdlib.h>
16 #include <string.h>
17 #include "windows.h"
18 #include "ldt.h"
19 #include "instance.h"
20 #include "local.h"
21 #include "module.h"
22 #include "stackframe.h"
23 #include "toolhelp.h"
24 #include "stddebug.h"
25 #include "debug.h"
26
27 #ifndef WINELIB
28 #pragma pack(1)
29 #endif
30
31 typedef struct
32 {
33 /* Arena header */
34 WORD prev; /* Previous arena | arena type */
35 WORD next; /* Next arena */
36 /* Start of the memory block or free-list info */
37 WORD size; /* Size of the free block */
38 WORD free_prev; /* Previous free block */
39 WORD free_next; /* Next free block */
40 } LOCALARENA;
41
42 #define ARENA_HEADER_SIZE 4
43 #define ARENA_HEADER( handle) ( ((handle) & ~3) - ARENA_HEADER_SIZE)
44
45 /* Arena types (stored in 'prev' field of the arena) */
46 #define LOCAL_ARENA_FREE 0
47 #define LOCAL_ARENA_FIXED 1
48
49 /* Layout of a handle entry table
50 *
51 * WORD count of entries
52 * LOCALHANDLEENTRY[count] entries
53 * WORD near ptr to next table
54 */
55 typedef struct
56 {
57 WORD addr; /* Address of the MOVEABLE block */
58 BYTE flags; /* Flags for this block */
59 BYTE lock; /* Lock count */
60 } LOCALHANDLEENTRY;
61
62 typedef struct
63 {
64 WORD check; /* 00 Heap checking flag */
65 WORD freeze; /* 02 Heap frozen flag */
66 WORD items; /* 04 Count of items on the heap */
67 WORD first; /* 06 First item of the heap */
68 WORD pad1; /* 08 Always 0 */
69 WORD last; /* 0a Last item of the heap */
70 WORD pad2; /* 0c Always 0 */
71 BYTE ncompact; /* 0e Compactions counter */
72 BYTE dislevel; /* 0f Discard level */
73 DWORD distotal; /* 10 Total bytes discarded */
74 WORD htable; /* 14 Pointer to handle table */
75 WORD hfree; /* 16 Pointer to free handle table */
76 WORD hdelta; /* 18 Delta to expand the handle table */
77 WORD expand; /* 1a Pointer to expand function (unused) */
78 WORD pstat; /* 1c Pointer to status structure (unused) */
79 FARPROC notify WINE_PACKED; /* 1e Pointer to LocalNotify() function */
80 WORD lock; /* 22 Lock count for the heap */
81 WORD extra; /* 24 Extra bytes to allocate when expanding */
82 WORD minsize; /* 26 Minimum size of the heap */
83 WORD magic; /* 28 Magic number */
84 } LOCALHEAPINFO;
85
86 #ifndef WINELIB
87 #pragma pack(4)
88 #endif
89
90 #define LOCAL_HEAP_MAGIC 0x484c /* 'LH' */
91
92
93 /* All local heap allocations are aligned on 4-byte boundaries */
94 #define LALIGN(word) (((word) + 3) & ~3)
95
96 #define ARENA_PTR(ptr,arena) ((LOCALARENA *)((char*)(ptr)+(arena)))
97 #define ARENA_PREV(ptr,arena) (ARENA_PTR((ptr),(arena))->prev & ~3)
98 #define ARENA_NEXT(ptr,arena) (ARENA_PTR((ptr),(arena))->next)
99 #define ARENA_FLAGS(ptr,arena) (ARENA_PTR((ptr),(arena))->prev & 3)
100
101 /* determine whether the handle belongs to a fixed or a moveable block */
102 #define HANDLE_FIXED(handle) (((handle) & 3) == 0)
103 #define HANDLE_MOVEABLE(handle) (((handle) & 3) == 2)
104
105 /***********************************************************************
106 * LOCAL_GetHeap
107 *
108 * Return a pointer to the local heap, making sure it exists.
109 */
110 static LOCALHEAPINFO *LOCAL_GetHeap( HANDLE16 ds )
111 {
112 LOCALHEAPINFO *pInfo;
113 INSTANCEDATA *ptr = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN( ds, 0 );
114 dprintf_local( stddeb, "Heap at %p, %04x\n", ptr, ptr->heap );
115 if (!ptr->heap) return NULL;
116 if (IsBadReadPtr((SEGPTR)MAKELONG( ptr->heap, ds ), sizeof(LOCALHEAPINFO)))
117 return NULL;
118 pInfo = (LOCALHEAPINFO*)((char*)ptr + ptr->heap);
119 if (pInfo->magic != LOCAL_HEAP_MAGIC) return NULL;
120 return pInfo;
121 }
122
123
124 /***********************************************************************
125 * LOCAL_MakeBlockFree
126 *
127 * Make a block free, inserting it in the free-list.
128 * 'block' is the handle of the block arena; 'baseptr' points to
129 * the beginning of the data segment containing the heap.
130 */
131 static void LOCAL_MakeBlockFree( char *baseptr, WORD block )
132 {
133 LOCALARENA *pArena, *pNext;
134 WORD next;
135
136 /* Mark the block as free */
137
138 pArena = ARENA_PTR( baseptr, block );
139 pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FREE;
140 pArena->size = pArena->next - block;
141
142 /* Find the next free block (last block is always free) */
143
144 next = pArena->next;
145 for (;;)
146 {
147 pNext = ARENA_PTR( baseptr, next );
148 if ((pNext->prev & 3) == LOCAL_ARENA_FREE) break;
149 next = pNext->next;
150 }
151
152 dprintf_local( stddeb, "Local_AddFreeBlock %04x, next %04x\n", block, next );
153 /* Insert the free block in the free-list */
154
155 pArena->free_prev = pNext->free_prev;
156 pArena->free_next = next;
157 ARENA_PTR(baseptr,pNext->free_prev)->free_next = block;
158 pNext->free_prev = block;
159 }
160
161
162 /***********************************************************************
163 * LOCAL_RemoveFreeBlock
164 *
165 * Remove a block from 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.
168 */
169 static void LOCAL_RemoveFreeBlock( char *baseptr, WORD block )
170 {
171 /* Mark the block as fixed */
172
173 LOCALARENA *pArena = ARENA_PTR( baseptr, block );
174 pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FIXED;
175
176 /* Remove it from the list */
177
178 ARENA_PTR(baseptr,pArena->free_prev)->free_next = pArena->free_next;
179 ARENA_PTR(baseptr,pArena->free_next)->free_prev = pArena->free_prev;
180 }
181
182
183 /***********************************************************************
184 * LOCAL_AddBlock
185 *
186 * Insert a new block in the heap.
187 * 'new' is the handle of the new block arena; 'baseptr' points to
188 * the beginning of the data segment containing the heap; 'prev' is
189 * the block before the new one.
190 */
191 static void LOCAL_AddBlock( char *baseptr, WORD prev, WORD new )
192 {
193 LOCALARENA *pPrev = ARENA_PTR( baseptr, prev );
194 LOCALARENA *pNew = ARENA_PTR( baseptr, new );
195
196 pNew->prev = (prev & ~3) | LOCAL_ARENA_FIXED;
197 pNew->next = pPrev->next;
198 ARENA_PTR(baseptr,pPrev->next)->prev &= 3;
199 ARENA_PTR(baseptr,pPrev->next)->prev |= new;
200 pPrev->next = new;
201 }
202
203
204 /***********************************************************************
205 * LOCAL_RemoveBlock
206 *
207 * Remove a block from the heap.
208 * 'block' is the handle of the block arena; 'baseptr' points to
209 * the beginning of the data segment containing the heap.
210 */
211 static void LOCAL_RemoveBlock( char *baseptr, WORD block )
212 {
213 LOCALARENA *pArena, *pTmp;
214
215 /* Remove the block from the free-list */
216
217 dprintf_local( stddeb, "Local_RemoveBlock\n");
218 pArena = ARENA_PTR( baseptr, block );
219 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
220 LOCAL_RemoveFreeBlock( baseptr, block );
221
222 /* If the previous block is free, expand its size */
223
224 pTmp = ARENA_PTR( baseptr, pArena->prev & ~3 );
225 if ((pTmp->prev & 3) == LOCAL_ARENA_FREE)
226 pTmp->size += pArena->next - block;
227
228 /* Remove the block from the linked list */
229
230 pTmp->next = pArena->next;
231 pTmp = ARENA_PTR( baseptr, pArena->next );
232 pTmp->prev = (pTmp->prev & 3) | (pArena->prev & ~3);
233 }
234
235
236 /***********************************************************************
237 * LOCAL_PrintHeap
238 */
239 static void LOCAL_PrintHeap( HANDLE16 ds )
240 {
241 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
242 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
243 WORD arena;
244
245 if (!debugging_local) return;
246 if (!pInfo)
247 {
248 printf( "Local Heap corrupted! ds=%04x\n", ds );
249 return;
250 }
251 printf( "Local Heap ds=%04x first=%04x last=%04x items=%d\n",
252 ds, pInfo->first, pInfo->last, pInfo->items );
253
254 arena = pInfo->first;
255 for (;;)
256 {
257 LOCALARENA *pArena = ARENA_PTR(ptr,arena);
258 printf( " %04x: prev=%04x next=%04x type=%d\n", arena,
259 pArena->prev & ~3, pArena->next, pArena->prev & 3 );
260 if (arena == pInfo->first)
261 {
262 printf( " size=%d free_prev=%04x free_next=%04x\n",
263 pArena->size, pArena->free_prev, pArena->free_next );
264 }
265 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
266 {
267 printf( " size=%d free_prev=%04x free_next=%04x\n",
268 pArena->size, pArena->free_prev, pArena->free_next );
269 if (pArena->next == arena) break; /* last one */
270 if (ARENA_PTR(ptr,pArena->free_next)->free_prev != arena)
271 {
272 printf( "*** arena->free_next->free_prev != arena\n" );
273 break;
274 }
275 }
276 if (pArena->next == arena)
277 {
278 printf( "*** last block is not marked free\n" );
279 break;
280 }
281 if ((ARENA_PTR(ptr,pArena->next)->prev & ~3) != arena)
282 {
283 printf( "*** arena->next->prev != arena (%04x, %04x)\n",
284 pArena->next, ARENA_PTR(ptr,pArena->next)->prev);
285 break;
286 }
287 arena = pArena->next;
288 }
289 }
290
291
292 /***********************************************************************
293 * LocalInit (KERNEL.4)
294 */
295 BOOL LocalInit( HANDLE selector, WORD start, WORD end )
296 {
297 char *ptr;
298 WORD heapInfoArena, freeArena, lastArena;
299 LOCALHEAPINFO *pHeapInfo;
300 LOCALARENA *pArena, *pFirstArena, *pLastArena;
301 NE_MODULE *pModule;
302
303 /* The initial layout of the heap is: */
304 /* - first arena (FIXED) */
305 /* - heap info structure (FIXED) */
306 /* - large free block (FREE) */
307 /* - last arena (FREE) */
308
309 dprintf_local(stddeb, "LocalInit: %04x %04x-%04x\n", selector, start, end);
310 if (!selector) selector = CURRENT_DS;
311 pHeapInfo = LOCAL_GetHeap(selector);
312
313 if (pHeapInfo) {
314 fprintf( stderr, "LocalInit: Heap %04x initialized twice.\n", selector);
315 if (debugging_local) LOCAL_PrintHeap(selector);
316 }
317
318 if (start == 0) {
319 /* Check if the segment is the DGROUP of a module */
320
321 if ((pModule = MODULE_GetPtr( GetExePtr( selector ) )))
322 {
323 SEGTABLEENTRY *pSeg = NE_SEG_TABLE( pModule ) + pModule->dgroup - 1;
324 if (pModule->dgroup && (pSeg->selector == selector)) {
325 /* We can't just use the simple method of using the value
326 * of minsize + stacksize, since there are programs that
327 * resize the data segment before calling InitTask(). So,
328 * we must put it at the end of the segment */
329 start = GlobalSize16( GlobalHandle16( selector ) );
330 start -= end;
331 end += start;
332 dprintf_local( stddeb," new start %04x, minstart: %04x\n", start, pSeg->minsize + pModule->stack_size);
333 }
334 }
335 }
336 ptr = PTR_SEG_OFF_TO_LIN( selector, 0 );
337
338 start = LALIGN( MAX( start, sizeof(INSTANCEDATA) ) );
339 heapInfoArena = LALIGN(start + sizeof(LOCALARENA) );
340 freeArena = LALIGN( heapInfoArena + ARENA_HEADER_SIZE
341 + sizeof(LOCALHEAPINFO) );
342 lastArena = (end - sizeof(LOCALARENA)) & ~3;
343
344 /* Make sure there's enough space. */
345
346 if (freeArena + sizeof(LOCALARENA) >= lastArena) return FALSE;
347
348 /* Initialise the first arena */
349
350 pFirstArena = ARENA_PTR( ptr, start );
351 pFirstArena->prev = start | LOCAL_ARENA_FIXED;
352 pFirstArena->next = heapInfoArena;
353 pFirstArena->size = LALIGN(sizeof(LOCALARENA));
354 pFirstArena->free_prev = start; /* this one */
355 pFirstArena->free_next = freeArena;
356
357 /* Initialise the arena of the heap info structure */
358
359 pArena = ARENA_PTR( ptr, heapInfoArena );
360 pArena->prev = start | LOCAL_ARENA_FIXED;
361 pArena->next = freeArena;
362
363 /* Initialise the heap info structure */
364
365 pHeapInfo = (LOCALHEAPINFO *) (ptr + heapInfoArena + ARENA_HEADER_SIZE );
366 memset( pHeapInfo, 0, sizeof(LOCALHEAPINFO) );
367 pHeapInfo->items = 4;
368 pHeapInfo->first = start;
369 pHeapInfo->last = lastArena;
370 pHeapInfo->htable = 0;
371 pHeapInfo->hdelta = 0x20;
372 pHeapInfo->extra = 0x200;
373 pHeapInfo->minsize = lastArena - freeArena;
374 pHeapInfo->magic = LOCAL_HEAP_MAGIC;
375
376 /* Initialise the large free block */
377
378 pArena = ARENA_PTR( ptr, freeArena );
379 pArena->prev = heapInfoArena | LOCAL_ARENA_FREE;
380 pArena->next = lastArena;
381 pArena->size = lastArena - freeArena;
382 pArena->free_prev = start;
383 pArena->free_next = lastArena;
384
385 /* Initialise the last block */
386
387 pLastArena = ARENA_PTR( ptr, lastArena );
388 pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
389 pLastArena->next = lastArena; /* this one */
390 pLastArena->size = LALIGN(sizeof(LOCALARENA));
391 pLastArena->free_prev = freeArena;
392 pLastArena->free_next = lastArena; /* this one */
393
394 /* Store the local heap address in the instance data */
395
396 ((INSTANCEDATA *)ptr)->heap = heapInfoArena + ARENA_HEADER_SIZE;
397 LOCAL_PrintHeap( selector );
398 return TRUE;
399 }
400
401 /***********************************************************************
402 * LOCAL_GrowHeap
403 */
404 static void LOCAL_GrowHeap( HANDLE16 ds )
405 {
406 HANDLE hseg = GlobalHandle16( ds );
407 LONG oldsize = GlobalSize16( hseg );
408 LONG end;
409 LOCALHEAPINFO *pHeapInfo;
410 WORD freeArena, lastArena;
411 LOCALARENA *pArena, *pLastArena;
412 char *ptr;
413
414 /* if nothing can be gained, return */
415 if (oldsize > 0xfff0) return;
416 hseg = GlobalReAlloc16( hseg, 0x10000, GMEM_FIXED );
417 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
418 pHeapInfo = LOCAL_GetHeap( ds );
419 if (pHeapInfo == NULL) {
420 fprintf( stderr, "Local_GrowHeap: heap not found\n" );
421 return;
422 }
423 end = GlobalSize16( hseg );
424 lastArena = (end - sizeof(LOCALARENA)) & ~3;
425
426 /* Update the HeapInfo */
427 pHeapInfo->items++;
428 freeArena = pHeapInfo->last;
429 pHeapInfo->last = lastArena;
430 pHeapInfo->minsize += end - oldsize;
431
432 /* grow the old last block */
433 pArena = ARENA_PTR( ptr, freeArena );
434 pArena->size = lastArena - freeArena;
435 pArena->next = lastArena;
436 pArena->free_next = lastArena;
437
438 /* Initialise the new last block */
439
440 pLastArena = ARENA_PTR( ptr, lastArena );
441 pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
442 pLastArena->next = lastArena; /* this one */
443 pLastArena->size = LALIGN(sizeof(LOCALARENA));
444 pLastArena->free_prev = freeArena;
445 pLastArena->free_next = lastArena; /* this one */
446
447 /* If block before freeArena is also free then merge them */
448 if((ARENA_PTR(ptr, (pArena->prev & ~3))->prev & 3) == LOCAL_ARENA_FREE)
449 {
450 LOCAL_RemoveBlock(ptr, freeArena);
451 pHeapInfo->items--;
452 }
453
454 dprintf_local( stddeb, "Heap expanded\n" );
455 LOCAL_PrintHeap( ds );
456 }
457
458
459 /***********************************************************************
460 * LOCAL_FreeArena
461 */
462 static HLOCAL16 LOCAL_FreeArena( WORD ds, WORD arena )
463 {
464 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
465 LOCALHEAPINFO *pInfo;
466 LOCALARENA *pArena, *pPrev, *pNext;
467
468 dprintf_local( stddeb, "LocalFreeArena: %04x ds=%04x\n", arena, ds );
469 if (!(pInfo = LOCAL_GetHeap( ds ))) return arena;
470
471 pArena = ARENA_PTR( ptr, arena );
472 if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
473 {
474 /* shouldn't happen */
475 fprintf( stderr, "LocalFreeArena: Trying to free block %04x twice!\n",
476 arena );
477 LOCAL_PrintHeap( ds );
478 return arena;
479 }
480
481 /* Check if we can merge with the previous block */
482
483 pPrev = ARENA_PTR( ptr, pArena->prev & ~3 );
484 pNext = ARENA_PTR( ptr, pArena->next );
485 if ((pPrev->prev & 3) == LOCAL_ARENA_FREE)
486 {
487 arena = pArena->prev & ~3;
488 pArena = pPrev;
489 LOCAL_RemoveBlock( ptr, pPrev->next );
490 pInfo->items--;
491 }
492 else /* Make a new free block */
493 {
494 LOCAL_MakeBlockFree( ptr, arena );
495 }
496
497 /* Check if we can merge with the next block */
498
499 if ((pArena->next == pArena->free_next) &&
500 (pArena->next != pInfo->last))
501 {
502 LOCAL_RemoveBlock( ptr, pArena->next );
503 pInfo->items--;
504 }
505 return 0;
506 }
507
508 /***********************************************************************
509 * LOCAL_GetFreeSpace
510 */
511 static WORD LOCAL_GetFreeSpace(WORD ds, WORD countdiscard)
512 {
513 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
514 LOCALHEAPINFO *pInfo;
515 LOCALARENA *pArena;
516 WORD arena;
517 WORD freespace = 0;
518
519 if (!(pInfo = LOCAL_GetHeap( ds )))
520 {
521 fprintf( stderr, "LOCAL_GetFreeSpace: Local heap not found\n" );
522 LOCAL_PrintHeap(ds);
523 return 0;
524 }
525 arena = pInfo->first;
526 pArena = ARENA_PTR( ptr, arena );
527 while (arena != pArena->free_next)
528 {
529 arena = pArena->free_next;
530 pArena = ARENA_PTR( ptr, arena );
531 if (pArena->size >= freespace) freespace = pArena->size;
532 }
533 /* FIXME doesn't yet calculate space that would become free if everything
534 were discarded when countdiscard == 1 */
535 if (freespace < ARENA_HEADER_SIZE) freespace = 0;
536 else freespace -= ARENA_HEADER_SIZE;
537 return freespace;
538 }
539
540
541 /***********************************************************************
542 * LOCAL_Compact
543 */
544 static WORD LOCAL_Compact( HANDLE16 ds, WORD minfree, WORD flags )
545 {
546 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ), *fcp, *mcp;
547 LOCALHEAPINFO *pInfo;
548 LOCALARENA *pArena, *pMoveArena, *pFinalArena;
549 WORD arena, movearena, finalarena, table;
550 WORD count, movesize, size, i;
551 WORD freespace;
552 LOCALHANDLEENTRY *pEntry;
553
554 if (!(pInfo = LOCAL_GetHeap( ds )))
555 {
556 fprintf( stderr, "Local_Compact: Local heap not found\n" );
557 LOCAL_PrintHeap(ds);
558 return 0;
559 }
560 dprintf_local(stddeb,
561 "LOCAL_Compact: ds = %04x, minfree = %04x, flags = %04x\n",
562 ds, minfree, flags);
563 freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
564 if(freespace >= minfree || (flags & LMEM_NOCOMPACT))
565 {
566 dprintf_local(stddeb, "Returning %04x.\n", freespace);
567 return freespace;
568 }
569 dprintf_local(stddeb, "Local_Compact: Compacting heap %04x.\n", ds);
570 table = pInfo->htable;
571 while(table)
572 {
573 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
574 for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
575 {
576 if((pEntry->lock == 0) && !(pEntry->flags &
577 (LMEM_DISCARDED >> 8)))
578 {
579 /* OK we can move this one if we want */
580 dprintf_local(stddeb,
581 "handle %04x (block %04x) can be moved.\n",
582 (WORD)((char *)pEntry - ptr), pEntry->addr);
583 movearena = ARENA_HEADER(pEntry->addr);
584 pMoveArena = ARENA_PTR(ptr, movearena);
585 movesize = pMoveArena->next - movearena;
586 arena = pInfo->first;
587 pArena = ARENA_PTR(ptr, arena);
588 size = 0xffff;
589 finalarena = 0;
590 /* Try to find the smallest arena that will do, */
591 /* which is below us in memory */
592 for(;;)
593 {
594 arena = pArena->free_next;
595 pArena = ARENA_PTR(ptr, arena);
596 if(arena >= movearena)
597 break;
598 if(arena == pArena->free_next)
599 break;
600 if((pArena->size >= movesize) && (pArena->size < size))
601 {
602 size = pArena->size;
603 finalarena = arena;
604 }
605 }
606 if (finalarena) /* Actually got somewhere to move */
607 {
608 dprintf_local(stddeb, "Moving it to %04x.\n", finalarena);
609 pFinalArena = ARENA_PTR(ptr, finalarena);
610
611 /* Check to see if it's worth creating a free arena at the end */
612 if(pFinalArena->size > movesize+LALIGN(sizeof(LOCALARENA)))
613 {
614 LOCAL_AddBlock(ptr, finalarena, finalarena + movesize);
615 LOCAL_MakeBlockFree(ptr, finalarena + movesize);
616 pInfo->items++;
617 }
618 /* Copy the arena to it's new location */
619 LOCAL_RemoveFreeBlock(ptr, finalarena);
620 memcpy((char *)pFinalArena + ARENA_HEADER_SIZE,
621 (char *)pMoveArena + ARENA_HEADER_SIZE,
622 movesize - ARENA_HEADER_SIZE );
623 /* Free the old location */
624 LOCAL_FreeArena(ds, movearena);
625 /* Update handle table entry */
626 pEntry->addr = finalarena + ARENA_HEADER_SIZE;
627 }
628 else if((ARENA_PTR(ptr, pMoveArena->prev & ~3)->prev & 3)
629 == LOCAL_ARENA_FREE)
630 {
631 /* Previous arena is free (but < movesize) */
632 /* so we can 'slide' movearena down into it */
633 finalarena = pMoveArena->prev & ~3;
634 pFinalArena = ARENA_PTR(ptr, finalarena);
635 dprintf_local(stddeb, "Sliding arena %04x to %04x.\n",
636 movearena, finalarena);
637 LOCAL_RemoveFreeBlock(ptr, finalarena);
638 LOCAL_RemoveBlock(ptr, movearena);
639 mcp = (char *)pMoveArena + ARENA_HEADER_SIZE;
640 fcp = (char *)pFinalArena + ARENA_HEADER_SIZE;
641 for(i = 0; i < movesize - ARENA_HEADER_SIZE; i++)
642 *(fcp++) = *(mcp++);
643 LOCAL_AddBlock(ptr, finalarena, finalarena + movesize);
644 LOCAL_MakeBlockFree(ptr, finalarena + movesize);
645 /* Update handle table entry */
646 pEntry->addr = finalarena + ARENA_HEADER_SIZE;
647 }
648 }
649 }
650 table = *(WORD *)pEntry;
651 }
652 freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
653 if(freespace >= minfree || (flags & LMEM_NODISCARD))
654 {
655 dprintf_local(stddeb, "Returning %04x.\n", freespace);
656 return freespace;
657 }
658
659 table = pInfo->htable;
660 while(table)
661 {
662 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
663 for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
664 {
665 if((pEntry->flags & (LMEM_DISCARDABLE >> 8)) &&
666 pEntry->lock == 0 && !(pEntry->flags & (LMEM_DISCARDED >> 8)))
667 {
668 dprintf_local(stddeb, "Discarding handle %04x (block %04x).\n",
669 (char *)pEntry - ptr, pEntry->addr);
670 LOCAL_FreeArena(ds, pEntry->addr);
671 pEntry->addr = 0;
672 pEntry->flags |= (LMEM_DISCARDED >> 8);
673 /* Call localnotify proc */
674 }
675 }
676 table = *(WORD *)pEntry;
677 }
678 return LOCAL_Compact(ds, 0xffff, LMEM_NODISCARD);
679 }
680
681
682 /***********************************************************************
683 * LOCAL_FindFreeBlock
684 */
685 static HLOCAL16 LOCAL_FindFreeBlock( HANDLE16 ds, WORD size )
686 {
687 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
688 LOCALHEAPINFO *pInfo;
689 LOCALARENA *pArena;
690 WORD arena;
691
692 if (!(pInfo = LOCAL_GetHeap( ds )))
693 {
694 fprintf( stderr, "Local_FindFreeBlock: Local heap not found\n" );
695 LOCAL_PrintHeap(ds);
696 return 0;
697 }
698
699 arena = pInfo->first;
700 pArena = ARENA_PTR( ptr, arena );
701 for (;;) {
702 arena = pArena->free_next;
703 pArena = ARENA_PTR( ptr, arena );
704 if (arena == pArena->free_next) break;
705 if (pArena->size >= size) return arena;
706 }
707 dprintf_local( stddeb, "Local_FindFreeBlock: not enough space\n" );
708 if (debugging_local) LOCAL_PrintHeap(ds);
709 return 0;
710 }
711
712 /***********************************************************************
713 * LOCAL_GetBlock
714 * The segment may get moved around in this function, so all callers
715 * should reset their pointer variables.
716 */
717 static HLOCAL16 LOCAL_GetBlock( HANDLE16 ds, WORD size, WORD flags )
718 {
719 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
720 LOCALHEAPINFO *pInfo;
721 LOCALARENA *pArena;
722 WORD arena;
723
724 if (!(pInfo = LOCAL_GetHeap( ds )))
725 {
726 fprintf( stderr, "Local_GetBlock: Local heap not found\n");
727 LOCAL_PrintHeap(ds);
728 return 0;
729 }
730
731 size += ARENA_HEADER_SIZE;
732 size = LALIGN( MAX( size, sizeof(LOCALARENA) ) );
733
734 /* Find a suitable free block */
735 arena = LOCAL_FindFreeBlock( ds, size );
736 if (arena == 0) {
737 /* no space: try to make some */
738 LOCAL_Compact( ds, size, flags );
739 arena = LOCAL_FindFreeBlock( ds, size );
740 }
741 if (arena == 0) {
742 /* still no space: try to grow the segment */
743 LOCAL_GrowHeap( ds );
744 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
745 pInfo = LOCAL_GetHeap( ds );
746 arena = LOCAL_FindFreeBlock( ds, size );
747 }
748 if (arena == 0) {
749 fprintf( stderr, "Local_GetBlock: not enough space in heap %04x for %d bytes\n",
750 ds, size );
751 return 0;
752 }
753
754 /* Make a block out of the free arena */
755 pArena = ARENA_PTR( ptr, arena );
756 dprintf_local( stddeb, "LOCAL_GetBlock size = %04x, arena at %04x size %04x\n", size,
757 arena, pArena->size );
758 if (pArena->size > size + LALIGN(sizeof(LOCALARENA)))
759 {
760 LOCAL_AddBlock( ptr, arena, arena+size );
761 LOCAL_MakeBlockFree( ptr, arena+size );
762 pInfo->items++;
763 }
764 LOCAL_RemoveFreeBlock( ptr, arena );
765
766 if (flags & LMEM_ZEROINIT) {
767 memset( (char *)pArena + ARENA_HEADER_SIZE, 0, size - ARENA_HEADER_SIZE );
768 }
769
770 dprintf_local( stddeb, "Local_GetBlock: arena at %04x\n", arena );
771 return arena + ARENA_HEADER_SIZE;
772 }
773
774
775 /***********************************************************************
776 * LOCAL_NewHTable
777 */
778 static BOOL LOCAL_NewHTable( HANDLE16 ds )
779 {
780 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
781 LOCALHEAPINFO *pInfo;
782 LOCALHANDLEENTRY *pEntry;
783 HLOCAL16 handle;
784 int i;
785
786 dprintf_local( stddeb, "Local_NewHTable\n" );
787 if (!(pInfo = LOCAL_GetHeap( ds )))
788 {
789 fprintf( stderr, "Local heap not found\n");
790 LOCAL_PrintHeap(ds);
791 return FALSE;
792 }
793
794 if (!(handle = LOCAL_GetBlock( ds, pInfo->hdelta * sizeof(LOCALHANDLEENTRY)
795 + 2 * sizeof(WORD), LMEM_FIXED )))
796 return FALSE;
797 if (!(ptr = PTR_SEG_OFF_TO_LIN( ds, 0 )))
798 fprintf(stderr, "LOCAL_NewHTable: ptr == NULL after GetBlock.\n");
799 if (!(pInfo = LOCAL_GetHeap( ds )))
800 fprintf(stderr,"LOCAL_NewHTable: pInfo == NULL after GetBlock.\n");
801
802 /* Fill the entry table */
803
804 *(WORD *)(ptr + handle) = pInfo->hdelta;
805 pEntry = (LOCALHANDLEENTRY *)(ptr + handle + sizeof(WORD));
806 for (i = pInfo->hdelta; i > 0; i--) (pEntry++)->lock = 0xff;
807 *(WORD *)pEntry = pInfo->htable;
808 pInfo->htable = handle;
809 return TRUE;
810 }
811
812
813 /***********************************************************************
814 * LOCAL_GetNewHandleEntry
815 */
816 static HLOCAL16 LOCAL_GetNewHandleEntry( HANDLE16 ds )
817 {
818 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
819 LOCALHEAPINFO *pInfo;
820 LOCALHANDLEENTRY *pEntry = NULL;
821 WORD table;
822
823 if (!(pInfo = LOCAL_GetHeap( ds )))
824 {
825 fprintf( stderr, "LOCAL_GetNewHandleEntry: Local heap not found\n");
826 LOCAL_PrintHeap(ds);
827 return 0;
828 }
829
830 /* Find a free slot in existing tables */
831
832 table = pInfo->htable;
833 while (table)
834 {
835 WORD count = *(WORD *)(ptr + table);
836 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
837 for (; count > 0; count--, pEntry++)
838 if (pEntry->lock == 0xff) break;
839 if (count) break;
840 table = *(WORD *)pEntry;
841 }
842
843 if (!table) /* We need to create a new table */
844 {
845 if (!LOCAL_NewHTable( ds )) return 0;
846 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
847 pInfo = LOCAL_GetHeap( ds );
848 pEntry = (LOCALHANDLEENTRY *)(ptr + pInfo->htable + sizeof(WORD));
849 }
850
851 /* Now allocate this entry */
852
853 pEntry->lock = 0;
854 dprintf_local( stddeb, "LOCAL_GetNewHandleEntry(%04x): %04x\n",
855 ds, ((char *)pEntry - ptr) );
856 return (HLOCAL16)((char *)pEntry - ptr);
857 }
858
859
860 /***********************************************************************
861 * LOCAL_FreeHandleEntry
862 *
863 * Free a handle table entry.
864 */
865 static void LOCAL_FreeHandleEntry( HANDLE16 ds, HLOCAL16 handle )
866 {
867 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
868 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
869 LOCALHEAPINFO *pInfo;
870 WORD *pTable;
871 WORD table, count, i;
872
873 if (!(pInfo = LOCAL_GetHeap( ds ))) return;
874
875 /* Find the table where this handle comes from */
876
877 pTable = &pInfo->htable;
878 while (*pTable)
879 {
880 WORD size = (*(WORD *)(ptr + *pTable)) * sizeof(LOCALHANDLEENTRY);
881 if ((handle >= *pTable + sizeof(WORD)) &&
882 (handle < *pTable + sizeof(WORD) + size)) break; /* Found it */
883 pTable = (WORD *)(ptr + *pTable + sizeof(WORD) + size);
884 }
885 if (!*pTable)
886 {
887 fprintf(stderr, "LOCAL_FreeHandleEntry: invalid entry %04x\n", handle);
888 LOCAL_PrintHeap( ds );
889 return;
890 }
891
892 /* Make the entry free */
893
894 pEntry->addr = 0; /* just in case */
895 pEntry->lock = 0xff;
896
897 /* Now check if all entries in this table are free */
898
899 table = *pTable;
900 pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
901 count = *(WORD *)(ptr + table);
902 for (i = count; i > 0; i--, pEntry++) if (pEntry->lock != 0xff) return;
903
904 /* Remove the table from the linked list and free it */
905
906 dprintf_local( stddeb, "LOCAL_FreeHandleEntry(%04x): freeing table %04x\n",
907 ds, table);
908 *pTable = *(WORD *)pEntry;
909 LOCAL_FreeArena( ds, ARENA_HEADER( table ) );
910 }
911
912
913 /***********************************************************************
914 * LOCAL_Free
915 *
916 * Implementation of LocalFree().
917 */
918 HLOCAL16 LOCAL_Free( HANDLE16 ds, HLOCAL16 handle )
919 {
920 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
921
922 dprintf_local( stddeb, "LocalFree: %04x ds=%04x\n", handle, ds );
923
924 if (!handle) { fprintf( stderr, "LOCAL_Free: handle is 0.\n" ); return 0; }
925 if (HANDLE_FIXED( handle ))
926 {
927 if (!LOCAL_FreeArena( ds, ARENA_HEADER( handle ) )) return 0; /* OK */
928 else return handle; /* couldn't free it */
929 }
930 else
931 {
932 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
933 if (!(pEntry->flags & (LMEM_DISCARDED >> 8)))
934 {
935 dprintf_local( stddeb, "LocalFree: real block at %04x\n",
936 pEntry->addr );
937 if (LOCAL_FreeArena( ds, ARENA_HEADER(pEntry->addr) ))
938 return handle; /* couldn't free it */
939 }
940 LOCAL_FreeHandleEntry( ds, handle );
941 return 0; /* OK */
942 }
943 }
944
945
946 /***********************************************************************
947 * LOCAL_Alloc
948 *
949 * Implementation of LocalAlloc().
950 */
951 HLOCAL16 LOCAL_Alloc( HANDLE16 ds, WORD flags, WORD size )
952 {
953 char *ptr;
954 HLOCAL16 handle;
955
956 dprintf_local( stddeb, "LocalAlloc: %04x %d ds=%04x\n", flags, size, ds );
957
958 if (flags & LMEM_MOVEABLE)
959 {
960 LOCALHANDLEENTRY *plhe;
961 HLOCAL16 hmem;
962
963 if (!(hmem = LOCAL_GetBlock( ds, size, flags ))) return 0;
964 if (!(handle = LOCAL_GetNewHandleEntry( ds )))
965 {
966 fprintf( stderr, "LocalAlloc: couldn't get handle\n");
967 LOCAL_FreeArena( ds, ARENA_HEADER(hmem) );
968 return 0;
969 }
970 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
971 plhe = (LOCALHANDLEENTRY *)(ptr + handle);
972 plhe->addr = hmem;
973 plhe->flags = (BYTE)(flags >> 8);
974 plhe->lock = 0;
975 }
976 else handle = LOCAL_GetBlock( ds, size, flags );
977
978 return handle;
979 }
980
981
982 /***********************************************************************
983 * LOCAL_ReAlloc
984 *
985 * Implementation of LocalReAlloc().
986 */
987 HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
988 {
989 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
990 LOCALHEAPINFO *pInfo;
991 LOCALARENA *pArena, *pNext;
992 LOCALHANDLEENTRY *pEntry;
993 WORD arena, newhandle, blockhandle;
994 LONG nextarena;
995
996 if (!handle) return LOCAL_Alloc( ds, size, flags );
997
998 dprintf_local( stddeb, "LocalReAlloc: %04x %d %04x ds=%04x\n",
999 handle, size, flags, ds );
1000 if (!(pInfo = LOCAL_GetHeap( ds ))) return 0;
1001
1002 if (HANDLE_FIXED( handle )) blockhandle = handle;
1003 else blockhandle = *(WORD *)(ptr + handle);
1004
1005 arena = ARENA_HEADER( blockhandle );
1006 dprintf_local( stddeb, "LocalReAlloc: arena is %04x\n", arena );
1007 pArena = ARENA_PTR( ptr, arena );
1008
1009 if ((flags & LMEM_MODIFY) && (flags & LMEM_DISCARDABLE))
1010 {
1011 if (HANDLE_FIXED(handle))
1012 {
1013 fprintf(stderr,"LocalReAlloc: LMEM_MODIFY & LMEM_DISCARDABLE on a fixed handle.\n");
1014 return handle;
1015 }
1016 dprintf_local( stddeb, "Making block discardable.\n" );
1017 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1018 pEntry->flags |= (LMEM_DISCARDABLE >> 8);
1019 return handle;
1020 }
1021
1022 if ((flags & LMEM_MODIFY) || (flags & LMEM_DISCARDABLE))
1023 {
1024 fprintf(stderr,"LocalReAlloc: flags %04x. MODIFY & DISCARDABLE should both be set\n", flags);
1025 return handle;
1026 }
1027
1028 if (!size)
1029 {
1030 if (HANDLE_FIXED(handle))
1031 {
1032 if (flags & LMEM_MOVEABLE)
1033 {
1034 dprintf_local(stddeb, "Freeing fixed block.\n");
1035 return LOCAL_Free( ds, handle );
1036 }
1037 else size = 1;
1038 }
1039 else
1040 {
1041 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1042 if (pEntry->lock == 0)
1043 {
1044 /* discards moveable blocks is this right? */
1045 dprintf_local(stddeb,"Discarding block\n");
1046 LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr));
1047 pEntry->addr = 0;
1048 pEntry->flags = (LMEM_DISCARDED >> 8);
1049 return 0;
1050 }
1051 return handle;
1052 }
1053 }
1054
1055 size = LALIGN( size );
1056 nextarena = LALIGN(blockhandle + size);
1057
1058 /* Check for size reduction */
1059
1060 if (nextarena < pArena->next)
1061 {
1062 if (nextarena < pArena->next - LALIGN(sizeof(LOCALARENA)))
1063 {
1064 dprintf_local( stddeb, "size reduction, making new free block\n");
1065 /* It is worth making a new free block */
1066 LOCAL_AddBlock( ptr, arena, nextarena );
1067 LOCAL_MakeBlockFree( ptr, nextarena );
1068 pInfo->items++;
1069 }
1070 dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", handle );
1071 return handle;
1072 }
1073
1074 /* Check if the next block is free */
1075
1076 pNext = ARENA_PTR( ptr, pArena->next );
1077 if (((pNext->prev & 3) == LOCAL_ARENA_FREE) &&
1078 (nextarena <= pNext->next))
1079 {
1080 LOCAL_RemoveBlock( ptr, pArena->next );
1081 if (nextarena < pArena->next - LALIGN(sizeof(LOCALARENA)))
1082 {
1083 dprintf_local( stddeb, "size increase, making new free block\n");
1084 /* It is worth making a new free block */
1085 LOCAL_AddBlock( ptr, arena, nextarena );
1086 LOCAL_MakeBlockFree( ptr, nextarena );
1087 pInfo->items++;
1088 }
1089 dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", handle );
1090 return handle;
1091 }
1092
1093 /* Now we have to allocate a new block, but not if fixed block and no
1094 LMEM_MOVEABLE */
1095
1096 if (HANDLE_FIXED(handle) && !(flags & LMEM_MOVEABLE))
1097 {
1098 dprintf_local(stddeb, "Needed to move fixed block, but LMEM_MOVEABLE not specified.\n");
1099 return 0; /* FIXME: should we free it here? */
1100 }
1101
1102 if (!(newhandle = LOCAL_GetBlock( ds, size, flags ))) return 0;
1103 ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1104 memcpy( ptr + newhandle, ptr + (arena + ARENA_HEADER_SIZE), size );
1105 LOCAL_FreeArena( ds, arena );
1106 if (HANDLE_MOVEABLE( handle ))
1107 {
1108 dprintf_local( stddeb, "LocalReAlloc: fixing handle\n");
1109 pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1110 pEntry->addr = newhandle;
1111 pEntry->flags |= ~(LMEM_DISCARDED >> 8); /* clear discarded flag */
1112 pEntry->lock = 0;
1113 newhandle = handle;
1114 }
1115 dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", newhandle );
1116 return newhandle;
1117 }
1118
1119
1120 /***********************************************************************
1121 * LOCAL_InternalLock
1122 */
1123 static HLOCAL16 LOCAL_InternalLock( LPSTR heap, HLOCAL16 handle )
1124 {
1125 dprintf_local( stddeb, "LocalLock: %04x ", handle );
1126 if (HANDLE_MOVEABLE(handle))
1127 {
1128 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(heap + handle);
1129 if (pEntry->lock < 0xfe) pEntry->lock++;
1130 handle = pEntry->addr;
1131 }
1132 dprintf_local( stddeb, "returning %04x\n", handle );
1133 return handle;
1134 }
1135
1136
1137 /***********************************************************************
1138 * LOCAL_Lock
1139 */
1140 LPSTR LOCAL_Lock( HANDLE16 ds, HLOCAL16 handle )
1141 {
1142 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1143 return handle ? ptr + LOCAL_InternalLock( ptr, handle ) : NULL;
1144 }
1145
1146
1147 /***********************************************************************
1148 * LOCAL_Unlock
1149 */
1150 BOOL LOCAL_Unlock( HANDLE16 ds, HLOCAL16 handle )
1151 {
1152 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1153
1154 dprintf_local( stddeb, "LocalUnlock: %04x\n", handle );
1155 if (HANDLE_MOVEABLE(handle))
1156 {
1157 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1158 if (!pEntry->lock || (pEntry->lock == 0xff)) return FALSE;
1159 /* For moveable block, return the new lock count */
1160 /* (see _Windows_Internals_ p. 197) */
1161 return --pEntry->lock;
1162 }
1163 else return FALSE;
1164 }
1165
1166
1167 /***********************************************************************
1168 * LOCAL_Size
1169 *
1170 * Implementation of LocalSize().
1171 */
1172 WORD LOCAL_Size( HANDLE16 ds, HLOCAL16 handle )
1173 {
1174 char *ptr = PTR_SEG_OFF_TO_LIN( CURRENT_DS, 0 );
1175 LOCALARENA *pArena;
1176
1177 dprintf_local( stddeb, "LocalSize: %04x ds=%04x\n", handle, ds );
1178
1179 if (HANDLE_MOVEABLE( handle )) handle = *(WORD *)(ptr + handle);
1180 pArena = ARENA_PTR( ptr, ARENA_HEADER(handle) );
1181 return pArena->next - handle;
1182 }
1183
1184
1185 /***********************************************************************
1186 * LOCAL_Flags
1187 *
1188 * Implementation of LocalFlags().
1189 */
1190 WORD LOCAL_Flags( HANDLE16 ds, HLOCAL16 handle )
1191 {
1192 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1193
1194 if (HANDLE_MOVEABLE(handle))
1195 {
1196 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
1197 dprintf_local( stddeb, "LOCAL_Flags(%04x,%04x): returning %04x\n",
1198 ds, handle, pEntry->lock | (pEntry->flags << 8) );
1199 return pEntry->lock | (pEntry->flags << 8);
1200 }
1201 else
1202 {
1203 dprintf_local( stddeb, "LOCAL_Flags(%04x,%04x): returning 0\n",
1204 ds, handle );
1205 return 0;
1206 }
1207 }
1208
1209
1210 /***********************************************************************
1211 * LOCAL_HeapSize
1212 *
1213 * Implementation of LocalHeapSize().
1214 */
1215 WORD LOCAL_HeapSize( HANDLE16 ds )
1216 {
1217 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
1218 if (!pInfo) return 0;
1219 return pInfo->last - pInfo->first;
1220 }
1221
1222
1223 /***********************************************************************
1224 * LOCAL_CountFree
1225 *
1226 * Implementation of LocalCountFree().
1227 */
1228 WORD LOCAL_CountFree( HANDLE16 ds )
1229 {
1230 WORD arena, total;
1231 LOCALARENA *pArena;
1232 LOCALHEAPINFO *pInfo;
1233 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1234
1235 if (!(pInfo = LOCAL_GetHeap( ds )))
1236 {
1237 fprintf( stderr, "LOCAL_Handle(%04x): Local heap not found\n", ds );
1238 LOCAL_PrintHeap( ds );
1239 return 0;
1240 }
1241
1242 total = 0;
1243 arena = pInfo->first;
1244 pArena = ARENA_PTR( ptr, arena );
1245 for (;;)
1246 {
1247 arena = pArena->free_next;
1248 pArena = ARENA_PTR( ptr, arena );
1249 if (arena == pArena->free_next) break;
1250 total += pArena->size;
1251 }
1252 dprintf_local( stddeb, "LOCAL_CountFree(%04x): returning %d\n", ds, total);
1253 return total;
1254 }
1255
1256
1257 /***********************************************************************
1258 * LOCAL_Handle
1259 *
1260 * Implementation of LocalHandle().
1261 */
1262 HLOCAL16 LOCAL_Handle( HANDLE16 ds, WORD addr )
1263 {
1264 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1265 LOCALHEAPINFO *pInfo;
1266 WORD table;
1267
1268 if (!(pInfo = LOCAL_GetHeap( ds )))
1269 {
1270 fprintf( stderr, "LOCAL_Handle(%04x): Local heap not found\n", ds );
1271 LOCAL_PrintHeap( ds );
1272 return 0;
1273 }
1274
1275 /* Find the address in the entry tables */
1276
1277 table = pInfo->htable;
1278 while (table)
1279 {
1280 WORD count = *(WORD *)(ptr + table);
1281 LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY*)(ptr+table+sizeof(WORD));
1282 for (; count > 0; count--, pEntry++)
1283 if (pEntry->addr == addr) return (HLOCAL16)((char *)pEntry - ptr);
1284 table = *(WORD *)pEntry;
1285 }
1286
1287 return (HLOCAL16)addr; /* Fixed block handle is addr */
1288 }
1289
1290
1291 /***********************************************************************
1292 * LocalAlloc16 (KERNEL.5)
1293 */
1294 HLOCAL16 LocalAlloc16( UINT16 flags, WORD size )
1295 {
1296 return LOCAL_Alloc( CURRENT_DS, flags, size );
1297 }
1298
1299
1300 /***********************************************************************
1301 * LocalReAlloc16 (KERNEL.6)
1302 */
1303 HLOCAL16 LocalReAlloc16( HLOCAL16 handle, WORD size, UINT16 flags )
1304 {
1305 return LOCAL_ReAlloc( CURRENT_DS, handle, size, flags );
1306 }
1307
1308
1309 /***********************************************************************
1310 * LocalFree16 (KERNEL.7)
1311 */
1312 HLOCAL16 LocalFree16( HLOCAL16 handle )
1313 {
1314 return LOCAL_Free( CURRENT_DS, handle );
1315 }
1316
1317
1318 /***********************************************************************
1319 * LocalLock16 (KERNEL.8)
1320 *
1321 * Note: only the offset part of the pointer is returned by the relay code.
1322 */
1323 SEGPTR LocalLock16( HLOCAL16 handle )
1324 {
1325 HANDLE16 ds = CURRENT_DS;
1326 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1327 return PTR_SEG_OFF_TO_SEGPTR( ds, LOCAL_InternalLock( ptr, handle ) );
1328 }
1329
1330
1331 /***********************************************************************
1332 * LocalUnlock16 (KERNEL.9)
1333 */
1334 BOOL LocalUnlock16( HLOCAL16 handle )
1335 {
1336 return LOCAL_Unlock( CURRENT_DS, handle );
1337 }
1338
1339
1340 /***********************************************************************
1341 * LocalSize16 (KERNEL.10)
1342 */
1343 UINT16 LocalSize16( HLOCAL16 handle )
1344 {
1345 return LOCAL_Size( CURRENT_DS, handle );
1346 }
1347
1348
1349 /***********************************************************************
1350 * LocalHandle16 (KERNEL.11)
1351 */
1352 HLOCAL16 LocalHandle16( WORD addr )
1353 {
1354 return LOCAL_Handle( CURRENT_DS, addr );
1355 }
1356
1357
1358 /***********************************************************************
1359 * LocalFlags16 (KERNEL.12)
1360 */
1361 UINT16 LocalFlags16( HLOCAL16 handle )
1362 {
1363 return LOCAL_Flags( CURRENT_DS, handle );
1364 }
1365
1366
1367 /***********************************************************************
1368 * LocalCompact16 (KERNEL.13)
1369 */
1370 UINT16 LocalCompact16( UINT16 minfree )
1371 {
1372 dprintf_local( stddeb, "LocalCompact: %04x\n", minfree );
1373 return LOCAL_Compact( CURRENT_DS, minfree, 0 );
1374 }
1375
1376
1377 /***********************************************************************
1378 * LocalNotify (KERNEL.14)
1379 */
1380 FARPROC LocalNotify( FARPROC func )
1381 {
1382 LOCALHEAPINFO *pInfo;
1383 FARPROC oldNotify;
1384 HANDLE16 ds = CURRENT_DS;
1385
1386 if (!(pInfo = LOCAL_GetHeap( ds )))
1387 {
1388 fprintf( stderr, "LOCAL_Notify(%04x): Local heap not found\n", ds );
1389 LOCAL_PrintHeap( ds );
1390 return 0;
1391 }
1392 dprintf_local( stddeb, "LocalNotify(%04x): %08lx\n", ds, (DWORD)func );
1393 oldNotify = pInfo->notify;
1394 pInfo->notify = func;
1395 return oldNotify;
1396 }
1397
1398
1399 /***********************************************************************
1400 * LocalShrink16 (KERNEL.121)
1401 */
1402 UINT16 LocalShrink16( HGLOBAL16 handle, UINT16 newsize )
1403 {
1404 dprintf_local( stddeb, "LocalShrink: %04x %04x\n", handle, newsize );
1405 return 0;
1406 }
1407
1408
1409 /***********************************************************************
1410 * GetHeapSpaces (KERNEL.138)
1411 */
1412 DWORD GetHeapSpaces( HMODULE module )
1413 {
1414 NE_MODULE *pModule;
1415 WORD ds;
1416
1417 module = GetExePtr( module );
1418 if (!(pModule = MODULE_GetPtr( module ))) return 0;
1419 ds = (NE_SEG_TABLE( pModule ) + pModule->dgroup - 1)->selector;
1420 return MAKELONG( LOCAL_CountFree( ds ), LOCAL_HeapSize( ds ) );
1421 }
1422
1423
1424 /***********************************************************************
1425 * LocalCountFree (KERNEL.161)
1426 */
1427 WORD LocalCountFree(void)
1428 {
1429 return LOCAL_CountFree( CURRENT_DS );
1430 }
1431
1432
1433 /***********************************************************************
1434 * LocalHeapSize (KERNEL.162)
1435 */
1436 WORD LocalHeapSize()
1437 {
1438 dprintf_local( stddeb, "LocalHeapSize:\n" );
1439 return LOCAL_HeapSize( CURRENT_DS );
1440 }
1441
1442
1443 /***********************************************************************
1444 * LocalHandleDelta (KERNEL.310)
1445 */
1446 WORD LocalHandleDelta( WORD delta )
1447 {
1448 LOCALHEAPINFO *pInfo;
1449
1450 if (!(pInfo = LOCAL_GetHeap( CURRENT_DS )))
1451 {
1452 fprintf( stderr, "LocalHandleDelta: Local heap not found\n");
1453 LOCAL_PrintHeap( CURRENT_DS );
1454 return 0;
1455 }
1456 if (delta) pInfo->hdelta = delta;
1457 dprintf_local(stddeb, "LocalHandleDelta: returning %04x\n", pInfo->hdelta);
1458 return pInfo->hdelta;
1459 }
1460
1461
1462 /***********************************************************************
1463 * LocalInfo (TOOLHELP.56)
1464 */
1465 BOOL LocalInfo( LOCALINFO *pLocalInfo, HGLOBAL handle )
1466 {
1467 LOCALHEAPINFO *pInfo = LOCAL_GetHeap(SELECTOROF(WIN16_GlobalLock16(handle)));
1468 if (!pInfo) return FALSE;
1469 pLocalInfo->wcItems = pInfo->items;
1470 return TRUE;
1471 }
1472
1473
1474 /***********************************************************************
1475 * LocalFirst (TOOLHELP.57)
1476 */
1477 BOOL LocalFirst( LOCALENTRY *pLocalEntry, HGLOBAL handle )
1478 {
1479 WORD ds = SELECTOROF( WIN16_GlobalLock16( handle ) );
1480 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1481 LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
1482 if (!pInfo) return FALSE;
1483
1484 pLocalEntry->hHandle = pInfo->first + ARENA_HEADER_SIZE;
1485 pLocalEntry->wAddress = pLocalEntry->hHandle;
1486 pLocalEntry->wFlags = LF_FIXED;
1487 pLocalEntry->wcLock = 0;
1488 pLocalEntry->wType = LT_NORMAL;
1489 pLocalEntry->hHeap = handle;
1490 pLocalEntry->wHeapType = NORMAL_HEAP;
1491 pLocalEntry->wNext = ARENA_PTR(ptr,pInfo->first)->next;
1492 pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
1493 return TRUE;
1494 }
1495
1496
1497 /***********************************************************************
1498 * LocalNext (TOOLHELP.58)
1499 */
1500 BOOL LocalNext( LOCALENTRY *pLocalEntry )
1501 {
1502 WORD ds = SELECTOROF( pLocalEntry->hHeap );
1503 char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
1504 LOCALARENA *pArena;
1505
1506 if (!LOCAL_GetHeap( ds )) return FALSE;
1507 if (!pLocalEntry->wNext) return FALSE;
1508 pArena = ARENA_PTR( ptr, pLocalEntry->wNext );
1509
1510 pLocalEntry->hHandle = pLocalEntry->wNext + ARENA_HEADER_SIZE;
1511 pLocalEntry->wAddress = pLocalEntry->hHandle;
1512 pLocalEntry->wFlags = (pArena->prev & 3) + 1;
1513 pLocalEntry->wcLock = 0;
1514 pLocalEntry->wType = LT_NORMAL;
1515 if (pArena->next != pLocalEntry->wNext) /* last one? */
1516 pLocalEntry->wNext = pArena->next;
1517 else
1518 pLocalEntry->wNext = 0;
1519 pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
1520 return TRUE;
1521 }
1522
1523 #ifndef WINELIB
1524
1525 #endif /* WINELIB */
1526
1527 /***********************************************************************
1528 * LocalAlloc32 (KERNEL32.371)
1529 */
1530 HLOCAL32 LocalAlloc32( UINT32 flags, DWORD size )
1531 {
1532 return (HLOCAL32)GlobalAlloc32( flags, size );
1533 }
1534
1535
1536 /***********************************************************************
1537 * LocalCompact32 (KERNEL32.372)
1538 */
1539 UINT32 LocalCompact32( UINT32 minfree )
1540 {
1541 return 0; /* LocalCompact does nothing in Win32 */
1542 }
1543
1544
1545 /***********************************************************************
1546 * LocalFlags32 (KERNEL32.374)
1547 */
1548 UINT32 LocalFlags32( HLOCAL32 handle )
1549 {
1550 return GlobalFlags32( (HGLOBAL32)handle );
1551 }
1552
1553
1554 /***********************************************************************
1555 * LocalFree32 (KERNEL32.375)
1556 */
1557 HLOCAL32 LocalFree32( HLOCAL32 handle )
1558 {
1559 return (HLOCAL32)GlobalFree32( (HGLOBAL32)handle );
1560 }
1561
1562
1563 /***********************************************************************
1564 * LocalHandle32 (KERNEL32.376)
1565 */
1566 HLOCAL32 LocalHandle32( LPCVOID ptr )
1567 {
1568 return (HLOCAL32)GlobalHandle32( ptr );
1569 }
1570
1571
1572 /***********************************************************************
1573 * LocalLock32 (KERNEL32.377)
1574 */
1575 LPVOID LocalLock32( HLOCAL32 handle )
1576 {
1577 return GlobalLock32( (HGLOBAL32)handle );
1578 }
1579
1580
1581 /***********************************************************************
1582 * LocalReAlloc32 (KERNEL32.378)
1583 */
1584 HLOCAL32 LocalReAlloc32( HLOCAL32 handle, DWORD size, UINT32 flags )
1585 {
1586 return (HLOCAL32)GlobalReAlloc32( (HGLOBAL32)handle, size, flags );
1587 }
1588
1589
1590 /***********************************************************************
1591 * LocalShrink32 (KERNEL32.379)
1592 */
1593 UINT32 LocalShrink32( HGLOBAL32 handle, UINT32 newsize )
1594 {
1595 return 0; /* LocalShrink does nothing in Win32 */
1596 }
1597
1598
1599 /***********************************************************************
1600 * LocalSize32 (KERNEL32.380)
1601 */
1602 UINT32 LocalSize32( HLOCAL32 handle )
1603 {
1604 return GlobalSize32( (HGLOBAL32)handle );
1605 }
1606
1607
1608 /***********************************************************************
1609 * LocalUnlock32 (KERNEL32.381)
1610 */
1611 BOOL LocalUnlock32( HLOCAL32 handle )
1612 {
1613 return GlobalUnlock32( (HGLOBAL32)handle );
1614 }
Windows API implementation