2 * Global heap functions
4 * Copyright 1995 Alexandre Julliard
6 /* 0xffff sometimes seems to mean: CURRENT_DS */
13 #include "wine/winbase16.h"
17 #include "selectors.h"
20 #include "stackframe.h"
25 DEFAULT_DEBUG_CHANNEL(global)
27 /* Global arena block */
30 DWORD base; /* Base address (0 if discarded) */
31 DWORD size; /* Size in bytes (0 indicates a free block) */
32 HGLOBAL16 handle; /* Handle for this block */
33 HGLOBAL16 hOwner; /* Owner of this block */
34 BYTE lockCount; /* Count of GlobalFix() calls */
35 BYTE pageLockCount; /* Count of GlobalPageLock() calls */
36 BYTE flags; /* Allocation flags */
37 BYTE selCount; /* Number of selectors allocated for this block */
43 /* Flags definitions */
44 #define GA_MOVEABLE 0x02 /* same as GMEM_MOVEABLE */
45 #define GA_DGROUP 0x04
46 #define GA_DISCARDABLE 0x08
47 #define GA_IPCSHARE 0x10 /* same as GMEM_DDESHARE */
50 static GLOBALARENA *pGlobalArena = NULL;
51 static int globalArenaSize = 0;
53 #define GLOBAL_MAX_ALLOC_SIZE 0x00ff0000 /* Largest allocation is 16M - 64K */
55 #define VALID_HANDLE(handle) (((handle)>>__AHSHIFT)<globalArenaSize)
56 #define GET_ARENA_PTR(handle) (pGlobalArena + ((handle) >> __AHSHIFT))
58 /***********************************************************************
61 * Return the arena for a given selector, growing the arena array if needed.
63 static GLOBALARENA *GLOBAL_GetArena( WORD sel, WORD selcount )
65 if (((sel >> __AHSHIFT) + selcount) > globalArenaSize)
67 int newsize = ((sel >> __AHSHIFT) + selcount + 0xff) & ~0xff;
68 GLOBALARENA *pNewArena = realloc( pGlobalArena,
69 newsize * sizeof(GLOBALARENA) );
70 if (!pNewArena) return 0;
71 pGlobalArena = pNewArena;
72 memset( pGlobalArena + globalArenaSize, 0,
73 (newsize - globalArenaSize) * sizeof(GLOBALARENA) );
74 globalArenaSize = newsize;
76 return pGlobalArena + (sel >> __AHSHIFT);
80 void debug_handles(void)
84 for (i = globalArenaSize-1 ; i>=0 ; i--) {
85 if (pGlobalArena[i].size!=0 && (pGlobalArena[i].handle & 0x8000)){
87 DUMP("0x%08x, ",pGlobalArena[i].handle);
95 /***********************************************************************
98 * Create a global heap block for a fixed range of linear memory.
100 HGLOBAL16 GLOBAL_CreateBlock( WORD flags, const void *ptr, DWORD size,
101 HGLOBAL16 hOwner, BOOL16 isCode,
102 BOOL16 is32Bit, BOOL16 isReadOnly,
108 /* Allocate the selector(s) */
110 sel = SELECTOR_AllocBlock( ptr, size,
111 isCode ? SEGMENT_CODE : SEGMENT_DATA,
112 is32Bit, isReadOnly );
115 selcount = (size + 0xffff) / 0x10000;
117 if (!(pArena = GLOBAL_GetArena( sel, selcount )))
119 SELECTOR_FreeBlock( sel, selcount );
123 /* Fill the arena block */
125 pArena->base = (DWORD)ptr;
126 pArena->size = GET_SEL_LIMIT(sel) + 1;
129 if (flags & GMEM_DDESHARE)
131 pArena->handle = shmdata->handle;
132 pArena->shmid = shmdata->shmid;
137 pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
141 pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
143 pArena->hOwner = hOwner;
144 pArena->lockCount = 0;
145 pArena->pageLockCount = 0;
146 pArena->flags = flags & GA_MOVEABLE;
147 if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
148 if (flags & GMEM_DDESHARE) pArena->flags |= GA_IPCSHARE;
149 if (!isCode) pArena->flags |= GA_DGROUP;
150 pArena->selCount = selcount;
151 if (selcount > 1) /* clear the next arena blocks */
152 memset( pArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
154 return pArena->handle;
158 /***********************************************************************
161 * Free a block allocated by GLOBAL_CreateBlock, without touching
162 * the associated linear memory range.
164 BOOL16 GLOBAL_FreeBlock( HGLOBAL16 handle )
169 if (!handle) return TRUE;
170 sel = GlobalHandleToSel16( handle );
171 if (!VALID_HANDLE(sel))
173 pArena = GET_ARENA_PTR(sel);
174 SELECTOR_FreeBlock( sel, (pArena->size + 0xffff) / 0x10000 );
175 memset( pArena, 0, sizeof(GLOBALARENA) );
179 /***********************************************************************
182 BOOL16 GLOBAL_MoveBlock( HGLOBAL16 handle, const void *ptr, DWORD size )
187 if (!handle) return TRUE;
188 sel = GlobalHandleToSel16( handle );
189 if (!VALID_HANDLE(sel))
191 pArena = GET_ARENA_PTR(sel);
192 if (pArena->selCount != 1)
195 pArena->base = (DWORD)ptr;
198 SELECTOR_MoveBlock( sel, ptr );
199 SetSelectorLimit16( sel, size-1 );
204 /***********************************************************************
207 * Implementation of GlobalAlloc16()
209 HGLOBAL16 GLOBAL_Alloc( UINT16 flags, DWORD size, HGLOBAL16 hOwner,
210 BOOL16 isCode, BOOL16 is32Bit, BOOL16 isReadOnly )
216 TRACE(global, "%ld flags=%04x\n", size, flags );
218 /* If size is 0, create a discarded block */
220 if (size == 0) return GLOBAL_CreateBlock( flags, NULL, 1, hOwner, isCode,
221 is32Bit, isReadOnly, NULL );
225 if (size >= GLOBAL_MAX_ALLOC_SIZE - 0x1f) return 0;
226 size = (size + 0x1f) & ~0x1f;
228 /* Allocate the linear memory */
231 if (flags & GMEM_DDESHARE)
232 ptr = DDE_malloc(flags, size, &shmdata);
234 #endif /* CONFIG_IPC */
236 ptr = HeapAlloc( SystemHeap, 0, size );
238 /* FIXME: free discardable blocks and try again? */
241 /* Allocate the selector(s) */
243 handle = GLOBAL_CreateBlock( flags, ptr, size, hOwner,
244 isCode, is32Bit, isReadOnly, &shmdata);
247 HeapFree( SystemHeap, 0, ptr );
251 if (flags & GMEM_ZEROINIT) memset( ptr, 0, size );
257 /***********************************************************************
260 * Find the arena for a given handle
261 * (when handle is not serial - e.g. DDE)
263 static GLOBALARENA *GLOBAL_FindArena( HGLOBAL16 handle)
266 for (i = globalArenaSize-1 ; i>=0 ; i--) {
267 if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == handle)
268 return ( &pGlobalArena[i] );
274 /***********************************************************************
275 * DDE_GlobalHandleToSel
278 WORD DDE_GlobalHandleToSel( HGLOBAL16 handle )
283 pArena= GLOBAL_FindArena(handle);
285 int ArenaIdx = pArena - pGlobalArena;
287 /* See if synchronized to the shared memory */
288 return DDE_SyncHandle(handle, ( ArenaIdx << __AHSHIFT) | 7);
291 /* attach the block */
292 DDE_AttachHandle(handle, &segptr);
294 return SELECTOROF( segptr );
296 #endif /* CONFIG_IPC */
299 /***********************************************************************
300 * GlobalAlloc16 (KERNEL.15)
305 HGLOBAL16 WINAPI GlobalAlloc16(
306 UINT16 flags, /* [in] Object allocation attributes */
307 DWORD size /* [in] Number of bytes to allocate */
309 HANDLE16 owner = GetCurrentPDB16();
311 if (flags & GMEM_DDESHARE)
312 owner = GetExePtr(owner); /* Make it a module handle */
313 return GLOBAL_Alloc( flags, size, owner, FALSE, FALSE, FALSE );
317 /***********************************************************************
318 * GlobalReAlloc16 (KERNEL.16)
323 HGLOBAL16 WINAPI GlobalReAlloc16(
324 HGLOBAL16 handle, /* [in] Handle of global memory object */
325 DWORD size, /* [in] New size of block */
326 UINT16 flags /* [in] How to reallocate object */
331 GLOBALARENA *pArena, *pNewArena;
332 WORD sel = GlobalHandleToSel16( handle );
334 TRACE(global, "%04x %ld flags=%04x\n",
335 handle, size, flags );
336 if (!handle) return 0;
339 if (flags & GMEM_DDESHARE || is_dde_handle(handle))
341 FIXME(global, "shared memory reallocating unimplemented\n");
344 #endif /* CONFIG_IPC */
346 if (!VALID_HANDLE(handle)) {
347 WARN(global, "Invalid handle 0x%04x!\n", handle);
350 pArena = GET_ARENA_PTR( handle );
352 /* Discard the block if requested */
354 if ((size == 0) && (flags & GMEM_MOVEABLE) && !(flags & GMEM_MODIFY))
356 if (!(pArena->flags & GA_MOVEABLE) ||
357 !(pArena->flags & GA_DISCARDABLE) ||
358 (pArena->lockCount > 0) || (pArena->pageLockCount > 0)) return 0;
359 HeapFree( SystemHeap, 0, (void *)pArena->base );
362 /* Note: we rely on the fact that SELECTOR_ReallocBlock won't
363 * change the selector if we are shrinking the block.
364 * FIXME: shouldn't we keep selectors until the block is deleted?
366 SELECTOR_ReallocBlock( sel, 0, 1 );
372 if (size > GLOBAL_MAX_ALLOC_SIZE - 0x20) return 0;
373 if (size == 0) size = 0x20;
374 else size = (size + 0x1f) & ~0x1f;
376 /* Change the flags */
378 if (flags & GMEM_MODIFY)
380 /* Change the flags, leaving GA_DGROUP alone */
381 pArena->flags = (pArena->flags & GA_DGROUP) | (flags & GA_MOVEABLE);
382 if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
386 /* Reallocate the linear memory */
388 ptr = (void *)pArena->base;
389 oldsize = pArena->size;
390 TRACE(global,"oldsize %08lx\n",oldsize);
391 if (ptr && (size == oldsize)) return handle; /* Nothing to do */
393 if (((char *)ptr >= DOSMEM_MemoryBase(0)) &&
394 ((char *)ptr <= DOSMEM_MemoryBase(0) + 0x100000))
395 ptr = DOSMEM_ResizeBlock(0, ptr, size, NULL);
397 ptr = HeapReAlloc( SystemHeap, 0, ptr, size );
400 SELECTOR_FreeBlock( sel, (oldsize + 0xffff) / 0x10000 );
401 memset( pArena, 0, sizeof(GLOBALARENA) );
405 /* Reallocate the selector(s) */
407 sel = SELECTOR_ReallocBlock( sel, ptr, size );
410 HeapFree( SystemHeap, 0, ptr );
411 memset( pArena, 0, sizeof(GLOBALARENA) );
414 selcount = (size + 0xffff) / 0x10000;
416 if (!(pNewArena = GLOBAL_GetArena( sel, selcount )))
418 HeapFree( SystemHeap, 0, ptr );
419 SELECTOR_FreeBlock( sel, selcount );
423 /* Fill the new arena block */
425 if (pNewArena != pArena) memcpy( pNewArena, pArena, sizeof(GLOBALARENA) );
426 pNewArena->base = (DWORD)ptr;
427 pNewArena->size = GET_SEL_LIMIT(sel) + 1;
428 pNewArena->selCount = selcount;
429 pNewArena->handle = (pNewArena->flags & GA_MOVEABLE) ? sel - 1 : sel;
431 if (selcount > 1) /* clear the next arena blocks */
432 memset( pNewArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
434 if ((oldsize < size) && (flags & GMEM_ZEROINIT))
435 memset( (char *)ptr + oldsize, 0, size - oldsize );
436 return pNewArena->handle;
440 /***********************************************************************
441 * GlobalFree16 (KERNEL.17)
446 HGLOBAL16 WINAPI GlobalFree16(
447 HGLOBAL16 handle /* [in] Handle of global memory object */
451 if (!VALID_HANDLE(handle)) {
452 WARN(global,"Invalid handle 0x%04x passed to GlobalFree16!\n",handle);
455 ptr = (void *)GET_ARENA_PTR(handle)->base;
457 TRACE(global, "%04x\n", handle );
458 if (!GLOBAL_FreeBlock( handle )) return handle; /* failed */
460 if (is_dde_handle(handle)) return DDE_GlobalFree(handle);
461 #endif /* CONFIG_IPC */
462 if (ptr) HeapFree( SystemHeap, 0, ptr );
467 /***********************************************************************
468 * WIN16_GlobalLock16 (KERNEL.18)
470 * This is the GlobalLock16() function used by 16-bit code.
472 SEGPTR WINAPI WIN16_GlobalLock16( HGLOBAL16 handle )
474 TRACE(global, "(%04x) -> %08lx\n",
475 handle, MAKELONG( 0, GlobalHandleToSel16(handle)) );
478 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
481 if (is_dde_handle(handle))
482 return PTR_SEG_OFF_TO_SEGPTR( DDE_GlobalHandleToSel(handle), 0 );
483 #endif /* CONFIG_IPC */
485 if (!VALID_HANDLE(handle)) {
486 WARN(global,"Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle);
489 if (!GET_ARENA_PTR(handle)->base) return (SEGPTR)0;
490 GET_ARENA_PTR(handle)->lockCount++;
491 return PTR_SEG_OFF_TO_SEGPTR( GlobalHandleToSel16(handle), 0 );
492 /* FIXME: put segment value in CX as well */
498 /***********************************************************************
499 * GlobalLock16 (KERNEL.18)
501 * This is the GlobalLock16() function used by 32-bit code.
504 * Pointer to first byte of memory block
507 LPVOID WINAPI GlobalLock16(
508 HGLOBAL16 handle /* [in] Handle of global memory object */
510 if (!handle) return 0;
511 if (!VALID_HANDLE(handle))
513 GET_ARENA_PTR(handle)->lockCount++;
515 if (is_dde_handle(handle)) return DDE_AttachHandle(handle, NULL);
517 return (LPVOID)GET_ARENA_PTR(handle)->base;
521 /***********************************************************************
522 * GlobalUnlock16 (KERNEL.19)
524 * Should the return values be cast to booleans?
527 * TRUE: Object is still locked
528 * FALSE: Object is unlocked
530 BOOL16 WINAPI GlobalUnlock16(
531 HGLOBAL16 handle /* [in] Handle of global memory object */
533 GLOBALARENA *pArena = GET_ARENA_PTR(handle);
534 if (!VALID_HANDLE(handle)) {
535 WARN(global,"Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle);
538 TRACE(global, "%04x\n", handle );
539 if (pArena->lockCount) pArena->lockCount--;
540 return pArena->lockCount;
543 /***********************************************************************
544 * GlobalChangeLockCount (KERNEL.365)
546 * This is declared as a register function as it has to preserve
547 * *all* registers, even AX/DX !
550 void WINAPI GlobalChangeLockCount16( CONTEXT *context )
552 LPWORD args = PTR_SEG_OFF_TO_LIN( SS_reg( context ), SP_reg( context ) );
553 HGLOBAL16 handle = (HGLOBAL16)args[3];
554 INT16 delta = (INT16) args[2];
557 GlobalLock16( handle );
558 else if ( delta == -1 )
559 GlobalUnlock16( handle );
561 ERR( global, "(%04X, %d): strange delta value\n", handle, delta );
564 /***********************************************************************
565 * GlobalSize16 (KERNEL.20)
567 * Size in bytes of object
570 DWORD WINAPI GlobalSize16(
571 HGLOBAL16 handle /* [in] Handle of global memory object */
573 TRACE(global, "%04x\n", handle );
574 if (!handle) return 0;
575 if (!VALID_HANDLE(handle))
577 return GET_ARENA_PTR(handle)->size;
581 /***********************************************************************
582 * GlobalHandle16 (KERNEL.21)
584 * Why is GlobalHandleToSel used here with the sel as input?
590 DWORD WINAPI GlobalHandle16(
591 WORD sel /* [in] Address of global memory block */
593 TRACE(global, "%04x\n", sel );
594 if (!VALID_HANDLE(sel)) {
595 WARN(global,"Invalid handle 0x%04x passed to GlobalHandle16!\n",sel);
598 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
601 /***********************************************************************
602 * GlobalHandleNoRIP (KERNEL.159)
604 DWORD WINAPI GlobalHandleNoRIP16( WORD sel )
607 for (i = globalArenaSize-1 ; i>=0 ; i--) {
608 if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == sel)
609 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
615 /***********************************************************************
616 * GlobalFlags16 (KERNEL.22)
618 * Should this return GMEM_INVALID_HANDLE instead of 0 on invalid
622 * Value specifying flags and lock count
623 * GMEM_INVALID_HANDLE: Invalid handle
625 UINT16 WINAPI GlobalFlags16(
626 HGLOBAL16 handle /* [in] Handle of global memory object */
630 TRACE(global, "%04x\n", handle );
631 if (!VALID_HANDLE(handle)) {
632 WARN(global,"Invalid handle 0x%04x passed to GlobalFlags16!\n",handle);
635 pArena = GET_ARENA_PTR(handle);
636 return pArena->lockCount |
637 ((pArena->flags & GA_DISCARDABLE) ? GMEM_DISCARDABLE : 0) |
638 ((pArena->base == 0) ? GMEM_DISCARDED : 0);
642 /***********************************************************************
643 * LockSegment16 (KERNEL.23)
645 HGLOBAL16 WINAPI LockSegment16( HGLOBAL16 handle )
647 TRACE(global, "%04x\n", handle );
648 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
649 if (!VALID_HANDLE(handle)) {
650 WARN(global,"Invalid handle 0x%04x passed to LockSegment16!\n",handle);
653 GET_ARENA_PTR(handle)->lockCount++;
658 /***********************************************************************
659 * UnlockSegment16 (KERNEL.24)
661 void WINAPI UnlockSegment16( HGLOBAL16 handle )
663 TRACE(global, "%04x\n", handle );
664 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
665 if (!VALID_HANDLE(handle)) {
666 WARN(global,"Invalid handle 0x%04x passed to UnlockSegment16!\n",handle);
669 GET_ARENA_PTR(handle)->lockCount--;
670 /* FIXME: this ought to return the lock count in CX (go figure...) */
674 /***********************************************************************
675 * GlobalCompact16 (KERNEL.25)
677 DWORD WINAPI GlobalCompact16( DWORD desired )
679 return GLOBAL_MAX_ALLOC_SIZE;
683 /***********************************************************************
684 * GlobalFreeAll (KERNEL.26)
686 void WINAPI GlobalFreeAll16( HGLOBAL16 owner )
691 pArena = pGlobalArena;
692 for (i = 0; i < globalArenaSize; i++, pArena++)
694 if ((pArena->size != 0) && (pArena->hOwner == owner))
695 GlobalFree16( pArena->handle );
700 /***********************************************************************
701 * GlobalWire16 (KERNEL.111)
703 SEGPTR WINAPI GlobalWire16( HGLOBAL16 handle )
705 return WIN16_GlobalLock16( handle );
709 /***********************************************************************
710 * GlobalUnWire16 (KERNEL.112)
712 BOOL16 WINAPI GlobalUnWire16( HGLOBAL16 handle )
714 return !GlobalUnlock16( handle );
718 /***********************************************************************
719 * SetSwapAreaSize16 (KERNEL.106)
721 LONG WINAPI SetSwapAreaSize16( WORD size )
723 FIXME(global, "(%d) - stub!\n", size );
724 return MAKELONG( size, 0xffff );
728 /***********************************************************************
729 * GlobalLRUOldest (KERNEL.163)
731 HGLOBAL16 WINAPI GlobalLRUOldest16( HGLOBAL16 handle )
733 TRACE(global, "%04x\n", handle );
734 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
739 /***********************************************************************
740 * GlobalLRUNewest (KERNEL.164)
742 HGLOBAL16 WINAPI GlobalLRUNewest16( HGLOBAL16 handle )
744 TRACE(global, "%04x\n", handle );
745 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
750 /***********************************************************************
751 * GetFreeSpace16 (KERNEL.169)
753 DWORD WINAPI GetFreeSpace16( UINT16 wFlags )
756 GlobalMemoryStatus( &ms );
757 return ms.dwAvailVirtual;
760 /***********************************************************************
761 * GlobalDOSAlloc (KERNEL.184)
763 * Address (HW=Paragraph segment; LW=Selector)
765 DWORD WINAPI GlobalDOSAlloc16(
766 DWORD size /* [in] Number of bytes to be allocated */
769 LPVOID lpBlock = DOSMEM_GetBlock( 0, size, &uParagraph );
773 HMODULE16 hModule = GetModuleHandle16("KERNEL");
776 wSelector = GLOBAL_CreateBlock(GMEM_FIXED, lpBlock, size,
777 hModule, 0, 0, 0, NULL );
778 return MAKELONG(wSelector,uParagraph);
784 /***********************************************************************
785 * GlobalDOSFree (KERNEL.185)
790 WORD WINAPI GlobalDOSFree16(
791 WORD sel /* [in] Selector */
793 DWORD block = GetSelectorBase(sel);
795 if( block && block < 0x100000 )
797 LPVOID lpBlock = DOSMEM_MapDosToLinear( block );
798 if( DOSMEM_FreeBlock( 0, lpBlock ) )
799 GLOBAL_FreeBlock( sel );
806 /***********************************************************************
807 * GlobalPageLock (KERNEL.191)
809 WORD WINAPI GlobalPageLock16( HGLOBAL16 handle )
811 TRACE(global, "%04x\n", handle );
812 if (!VALID_HANDLE(handle)) {
813 WARN(global,"Invalid handle 0x%04x passed to GlobalPageLock!\n",handle);
816 return ++(GET_ARENA_PTR(handle)->pageLockCount);
820 /***********************************************************************
821 * GlobalPageUnlock (KERNEL.192)
823 WORD WINAPI GlobalPageUnlock16( HGLOBAL16 handle )
825 TRACE(global, "%04x\n", handle );
826 if (!VALID_HANDLE(handle)) {
827 WARN(global,"Invalid handle 0x%04x passed to GlobalPageUnlock!\n",handle);
830 return --(GET_ARENA_PTR(handle)->pageLockCount);
834 /***********************************************************************
835 * GlobalFix16 (KERNEL.197)
837 WORD WINAPI GlobalFix16( HGLOBAL16 handle )
839 TRACE(global, "%04x\n", handle );
840 if (!VALID_HANDLE(handle)) {
841 WARN(global,"Invalid handle 0x%04x passed to GlobalFix16!\n",handle);
844 GET_ARENA_PTR(handle)->lockCount++;
846 return GlobalHandleToSel16(handle);
850 /***********************************************************************
851 * GlobalUnfix16 (KERNEL.198)
853 void WINAPI GlobalUnfix16( HGLOBAL16 handle )
855 TRACE(global, "%04x\n", handle );
856 if (!VALID_HANDLE(handle)) {
857 WARN(global,"Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle);
860 GET_ARENA_PTR(handle)->lockCount--;
864 /***********************************************************************
865 * FarSetOwner (KERNEL.403)
867 void WINAPI FarSetOwner16( HGLOBAL16 handle, HANDLE16 hOwner )
869 if (!VALID_HANDLE(handle)) {
870 WARN(global,"Invalid handle 0x%04x passed to FarSetOwner!\n",handle);
873 GET_ARENA_PTR(handle)->hOwner = hOwner;
877 /***********************************************************************
878 * FarGetOwner (KERNEL.404)
880 HANDLE16 WINAPI FarGetOwner16( HGLOBAL16 handle )
882 if (!VALID_HANDLE(handle)) {
883 WARN(global,"Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
886 return GET_ARENA_PTR(handle)->hOwner;
890 /***********************************************************************
891 * GlobalHandleToSel (TOOLHELP.50)
893 WORD WINAPI GlobalHandleToSel16( HGLOBAL16 handle )
895 if (!handle) return 0;
897 if (is_dde_handle(handle)) return DDE_GlobalHandleToSel(handle);
899 if (!VALID_HANDLE(handle)) {
900 WARN(global,"Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle);
905 WARN(global, "Program attempted invalid selector conversion\n" );
912 /***********************************************************************
913 * GlobalFirst (TOOLHELP.51)
915 BOOL16 WINAPI GlobalFirst16( GLOBALENTRY *pGlobal, WORD wFlags )
917 if (wFlags == GLOBAL_LRU) return FALSE;
919 return GlobalNext16( pGlobal, wFlags );
923 /***********************************************************************
924 * GlobalNext (TOOLHELP.52)
926 BOOL16 WINAPI GlobalNext16( GLOBALENTRY *pGlobal, WORD wFlags)
930 if (pGlobal->dwNext >= globalArenaSize) return FALSE;
931 pArena = pGlobalArena + pGlobal->dwNext;
932 if (wFlags == GLOBAL_FREE) /* only free blocks */
935 for (i = pGlobal->dwNext; i < globalArenaSize; i++, pArena++)
936 if (pArena->size == 0) break; /* block is free */
937 if (i >= globalArenaSize) return FALSE;
941 pGlobal->dwAddress = pArena->base;
942 pGlobal->dwBlockSize = pArena->size;
943 pGlobal->hBlock = pArena->handle;
944 pGlobal->wcLock = pArena->lockCount;
945 pGlobal->wcPageLock = pArena->pageLockCount;
946 pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
947 pGlobal->wHeapPresent = FALSE;
948 pGlobal->hOwner = pArena->hOwner;
949 pGlobal->wType = GT_UNKNOWN;
956 /***********************************************************************
957 * GlobalInfo (TOOLHELP.53)
959 BOOL16 WINAPI GlobalInfo16( GLOBALINFO *pInfo )
964 pInfo->wcItems = globalArenaSize;
965 pInfo->wcItemsFree = 0;
966 pInfo->wcItemsLRU = 0;
967 for (i = 0, pArena = pGlobalArena; i < globalArenaSize; i++, pArena++)
968 if (pArena->size == 0) pInfo->wcItemsFree++;
973 /***********************************************************************
974 * GlobalEntryHandle (TOOLHELP.54)
976 BOOL16 WINAPI GlobalEntryHandle16( GLOBALENTRY *pGlobal, HGLOBAL16 hItem )
978 GLOBALARENA *pArena = GET_ARENA_PTR(hItem);
980 pGlobal->dwAddress = pArena->base;
981 pGlobal->dwBlockSize = pArena->size;
982 pGlobal->hBlock = pArena->handle;
983 pGlobal->wcLock = pArena->lockCount;
984 pGlobal->wcPageLock = pArena->pageLockCount;
985 pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
986 pGlobal->wHeapPresent = FALSE;
987 pGlobal->hOwner = pArena->hOwner;
988 pGlobal->wType = GT_UNKNOWN;
995 /***********************************************************************
996 * GlobalEntryModule (TOOLHELP.55)
998 BOOL16 WINAPI GlobalEntryModule16( GLOBALENTRY *pGlobal, HMODULE16 hModule,
1005 /***********************************************************************
1006 * MemManInfo (TOOLHELP.72)
1008 BOOL16 WINAPI MemManInfo16( MEMMANINFO *info )
1010 MEMORYSTATUS status;
1013 * Not unsurprisingly although the documention says you
1014 * _must_ provide the size in the dwSize field, this function
1015 * (under Windows) always fills the structure and returns true.
1017 GlobalMemoryStatus( &status );
1018 info->wPageSize = VIRTUAL_GetPageSize();
1019 info->dwLargestFreeBlock = status.dwAvailVirtual;
1020 info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
1021 info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
1022 info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
1023 info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
1024 info->dwFreePages = info->dwMaxPagesAvailable;
1025 info->dwTotalPages = info->dwTotalLinearSpace;
1026 info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
1027 info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
1031 /***********************************************************************
1032 * GetFreeMemInfo (KERNEL.316)
1034 DWORD WINAPI GetFreeMemInfo16(void)
1037 MemManInfo16( &info );
1038 return MAKELONG( info.dwTotalLinearSpace, info.dwMaxPagesAvailable );
1042 * Win32 Global heap functions (GlobalXXX).
1043 * These functions included in Win32 for compatibility with 16 bit Windows
1044 * Especially the moveable blocks and handles are oldish.
1045 * But the ability to directly allocate memory with GPTR and LPTR is widely
1048 * The handle stuff looks horrible, but it's implemented almost like Win95
1053 #define MAGIC_GLOBAL_USED 0x5342
1054 #define GLOBAL_LOCK_MAX 0xFF
1055 #define HANDLE_TO_INTERN(h) ((PGLOBAL32_INTERN)(((char *)(h))-2))
1056 #define INTERN_TO_HANDLE(i) ((HGLOBAL) &((i)->Pointer))
1057 #define POINTER_TO_HANDLE(p) (*(((HGLOBAL *)(p))-1))
1058 #define ISHANDLE(h) (((DWORD)(h)&2)!=0)
1059 #define ISPOINTER(h) (((DWORD)(h)&2)==0)
1061 typedef struct __GLOBAL32_INTERN
1064 LPVOID Pointer WINE_PACKED;
1067 } GLOBAL32_INTERN, *PGLOBAL32_INTERN;
1070 /***********************************************************************
1071 * GlobalAlloc32 (KERNEL32.315)
1076 HGLOBAL WINAPI GlobalAlloc(
1077 UINT flags, /* [in] Object allocation attributes */
1078 DWORD size /* [in] Number of bytes to allocate */
1080 PGLOBAL32_INTERN pintern;
1084 if(flags&GMEM_ZEROINIT)
1085 hpflags=HEAP_ZERO_MEMORY;
1089 if((flags & GMEM_MOVEABLE)==0) /* POINTER */
1091 palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
1092 return (HGLOBAL) palloc;
1096 /* HeapLock(GetProcessHeap()); */
1098 pintern=HeapAlloc(GetProcessHeap(), 0, sizeof(GLOBAL32_INTERN));
1101 palloc=HeapAlloc(GetProcessHeap(), hpflags, size+sizeof(HGLOBAL));
1102 *(HGLOBAL *)palloc=INTERN_TO_HANDLE(pintern);
1103 pintern->Pointer=palloc+sizeof(HGLOBAL);
1106 pintern->Pointer=NULL;
1107 pintern->Magic=MAGIC_GLOBAL_USED;
1108 pintern->Flags=flags>>8;
1109 pintern->LockCount=0;
1111 /* HeapUnlock(GetProcessHeap()); */
1113 return INTERN_TO_HANDLE(pintern);
1118 /***********************************************************************
1119 * GlobalLock32 (KERNEL32.326)
1121 * Pointer to first byte of block
1124 LPVOID WINAPI GlobalLock(
1125 HGLOBAL hmem /* [in] Handle of global memory object */
1127 PGLOBAL32_INTERN pintern;
1131 return (LPVOID) hmem;
1133 /* HeapLock(GetProcessHeap()); */
1135 pintern=HANDLE_TO_INTERN(hmem);
1136 if(pintern->Magic==MAGIC_GLOBAL_USED)
1138 if(pintern->LockCount<GLOBAL_LOCK_MAX)
1139 pintern->LockCount++;
1140 palloc=pintern->Pointer;
1144 WARN(global, "invalid handle\n");
1145 palloc=(LPVOID) NULL;
1147 /* HeapUnlock(GetProcessHeap()); */;
1152 /***********************************************************************
1153 * GlobalUnlock32 (KERNEL32.332)
1155 * TRUE: Object is still locked
1156 * FALSE: Object is unlocked
1158 BOOL WINAPI GlobalUnlock(
1159 HGLOBAL hmem /* [in] Handle of global memory object */
1161 PGLOBAL32_INTERN pintern;
1167 /* HeapLock(GetProcessHeap()); */
1168 pintern=HANDLE_TO_INTERN(hmem);
1170 if(pintern->Magic==MAGIC_GLOBAL_USED)
1172 if((pintern->LockCount<GLOBAL_LOCK_MAX)&&(pintern->LockCount>0))
1173 pintern->LockCount--;
1175 locked=(pintern->LockCount==0) ? FALSE : TRUE;
1179 WARN(global, "invalid handle\n");
1182 /* HeapUnlock(GetProcessHeap()); */
1187 /***********************************************************************
1188 * GlobalHandle32 (KERNEL32.325)
1189 * Returns the handle associated with the specified pointer.
1192 * Since there in only one goto, can it be removed and the return
1199 HGLOBAL WINAPI GlobalHandle(
1200 LPCVOID pmem /* [in] Pointer to global memory block */
1204 if (!HEAP_IsInsideHeap( GetProcessHeap(), 0, pmem )) goto error;
1205 handle = POINTER_TO_HANDLE(pmem);
1206 if (HEAP_IsInsideHeap( GetProcessHeap(), 0, (LPCVOID)handle ))
1208 if (HANDLE_TO_INTERN(handle)->Magic == MAGIC_GLOBAL_USED)
1209 return handle; /* valid moveable block */
1211 /* maybe FIXED block */
1212 if (HeapValidate( GetProcessHeap(), 0, pmem ))
1213 return (HGLOBAL)pmem; /* valid fixed block */
1216 SetLastError( ERROR_INVALID_HANDLE );
1221 /***********************************************************************
1222 * GlobalReAlloc32 (KERNEL32.328)
1227 HGLOBAL WINAPI GlobalReAlloc(
1228 HGLOBAL hmem, /* [in] Handle of global memory object */
1229 DWORD size, /* [in] New size of block */
1230 UINT flags /* [in] How to reallocate object */
1234 PGLOBAL32_INTERN pintern;
1237 /* HeapLock(GetProcessHeap()); */
1238 if(flags & GMEM_MODIFY) /* modify flags */
1240 if( ISPOINTER(hmem) && (flags & GMEM_MOVEABLE))
1242 /* make a fixed block moveable
1243 * actually only NT is able to do this. But it's soo simple
1247 ERR(global, "GlobalReAlloc32 with null handle!\n");
1248 SetLastError( ERROR_NOACCESS );
1251 size=HeapSize(GetProcessHeap(), 0, (LPVOID) hmem);
1252 hnew=GlobalAlloc( flags, size);
1253 palloc=GlobalLock(hnew);
1254 memcpy(palloc, (LPVOID) hmem, size);
1258 else if( ISPOINTER(hmem) &&(flags & GMEM_DISCARDABLE))
1260 /* change the flags to make our block "discardable" */
1261 pintern=HANDLE_TO_INTERN(hmem);
1262 pintern->Flags = pintern->Flags | (GMEM_DISCARDABLE >> 8);
1267 SetLastError(ERROR_INVALID_PARAMETER);
1275 /* reallocate fixed memory */
1276 hnew=(HGLOBAL)HeapReAlloc(GetProcessHeap(), 0, (LPVOID) hmem, size);
1280 /* reallocate a moveable block */
1281 pintern=HANDLE_TO_INTERN(hmem);
1282 if(pintern->LockCount>1) {
1283 ERR(global,"handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
1284 SetLastError(ERROR_INVALID_HANDLE);
1288 if(pintern->Pointer)
1290 palloc=HeapReAlloc(GetProcessHeap(), 0,
1291 pintern->Pointer-sizeof(HGLOBAL),
1292 size+sizeof(HGLOBAL) );
1293 pintern->Pointer=palloc+sizeof(HGLOBAL);
1297 palloc=HeapAlloc(GetProcessHeap(), 0, size+sizeof(HGLOBAL));
1298 *(HGLOBAL *)palloc=hmem;
1299 pintern->Pointer=palloc+sizeof(HGLOBAL);
1304 if(pintern->Pointer)
1306 HeapFree(GetProcessHeap(), 0, pintern->Pointer-sizeof(HGLOBAL));
1307 pintern->Pointer=NULL;
1312 /* HeapUnlock(GetProcessHeap()); */
1317 /***********************************************************************
1318 * GlobalFree32 (KERNEL32.322)
1323 HGLOBAL WINAPI GlobalFree(
1324 HGLOBAL hmem /* [in] Handle of global memory object */
1326 PGLOBAL32_INTERN pintern;
1327 HGLOBAL hreturned = 0;
1329 if(ISPOINTER(hmem)) /* POINTER */
1331 if(!HeapFree(GetProcessHeap(), 0, (LPVOID) hmem)) hmem = 0;
1335 /* HeapLock(GetProcessHeap()); */
1336 pintern=HANDLE_TO_INTERN(hmem);
1338 if(pintern->Magic==MAGIC_GLOBAL_USED)
1340 if(pintern->LockCount!=0)
1341 SetLastError(ERROR_INVALID_HANDLE);
1342 if(pintern->Pointer)
1343 if(!HeapFree(GetProcessHeap(), 0,
1344 (char *)(pintern->Pointer)-sizeof(HGLOBAL)))
1346 if(!HeapFree(GetProcessHeap(), 0, pintern))
1349 /* HeapUnlock(GetProcessHeap()); */
1355 /***********************************************************************
1356 * GlobalSize32 (KERNEL32.329)
1358 * Size in bytes of the global memory object
1361 DWORD WINAPI GlobalSize(
1362 HGLOBAL hmem /* [in] Handle of global memory object */
1365 PGLOBAL32_INTERN pintern;
1369 retval=HeapSize(GetProcessHeap(), 0, (LPVOID) hmem);
1373 /* HeapLock(GetProcessHeap()); */
1374 pintern=HANDLE_TO_INTERN(hmem);
1376 if(pintern->Magic==MAGIC_GLOBAL_USED)
1378 if (!pintern->Pointer) /* handle case of GlobalAlloc( ??,0) */
1380 retval=HeapSize(GetProcessHeap(), 0,
1381 (char *)(pintern->Pointer)-sizeof(HGLOBAL))-4;
1385 WARN(global, "invalid handle\n");
1388 /* HeapUnlock(GetProcessHeap()); */
1390 /* HeapSize returns 0xffffffff on failure */
1391 if (retval == 0xffffffff) retval = 0;
1396 /***********************************************************************
1397 * GlobalWire32 (KERNEL32.333)
1399 LPVOID WINAPI GlobalWire(HGLOBAL hmem)
1401 return GlobalLock( hmem );
1405 /***********************************************************************
1406 * GlobalUnWire32 (KERNEL32.330)
1408 BOOL WINAPI GlobalUnWire(HGLOBAL hmem)
1410 return GlobalUnlock( hmem);
1414 /***********************************************************************
1415 * GlobalFix32 (KERNEL32.320)
1417 VOID WINAPI GlobalFix(HGLOBAL hmem)
1423 /***********************************************************************
1424 * GlobalUnfix32 (KERNEL32.331)
1426 VOID WINAPI GlobalUnfix(HGLOBAL hmem)
1428 GlobalUnlock( hmem);
1432 /***********************************************************************
1433 * GlobalFlags32 (KERNEL32.321)
1434 * Returns information about the specified global memory object
1437 * Should this return GMEM_INVALID_HANDLE on invalid handle?
1440 * Value specifying allocation flags and lock count
1441 * GMEM_INVALID_HANDLE: Failure
1443 UINT WINAPI GlobalFlags(
1444 HGLOBAL hmem /* [in] Handle to global memory object */
1447 PGLOBAL32_INTERN pintern;
1455 /* HeapLock(GetProcessHeap()); */
1456 pintern=HANDLE_TO_INTERN(hmem);
1457 if(pintern->Magic==MAGIC_GLOBAL_USED)
1459 retval=pintern->LockCount + (pintern->Flags<<8);
1460 if(pintern->Pointer==0)
1461 retval|= GMEM_DISCARDED;
1465 WARN(global,"Invalid handle: %04x", hmem);
1468 /* HeapUnlock(GetProcessHeap()); */
1474 /***********************************************************************
1475 * GlobalCompact32 (KERNEL32.316)
1477 DWORD WINAPI GlobalCompact( DWORD minfree )
1479 return 0; /* GlobalCompact does nothing in Win32 */
1483 /***********************************************************************
1484 * GlobalMemoryStatus (KERNEL32.327)
1488 VOID WINAPI GlobalMemoryStatus(
1489 LPMEMORYSTATUS lpmem
1492 FILE *f = fopen( "/proc/meminfo", "r" );
1496 int total, used, free, shared, buffers, cached;
1498 lpmem->dwLength = sizeof(MEMORYSTATUS);
1499 lpmem->dwTotalPhys = lpmem->dwAvailPhys = 0;
1500 lpmem->dwTotalPageFile = lpmem->dwAvailPageFile = 0;
1501 while (fgets( buffer, sizeof(buffer), f ))
1503 /* old style /proc/meminfo ... */
1504 if (sscanf( buffer, "Mem: %d %d %d %d %d %d", &total, &used, &free, &shared, &buffers, &cached ))
1506 lpmem->dwTotalPhys += total;
1507 lpmem->dwAvailPhys += free + buffers + cached;
1509 if (sscanf( buffer, "Swap: %d %d %d", &total, &used, &free ))
1511 lpmem->dwTotalPageFile += total;
1512 lpmem->dwAvailPageFile += free;
1515 /* new style /proc/meminfo ... */
1516 if (sscanf(buffer, "MemTotal: %d", &total))
1517 lpmem->dwTotalPhys = total*1024;
1518 if (sscanf(buffer, "MemFree: %d", &free))
1519 lpmem->dwAvailPhys = free*1024;
1520 if (sscanf(buffer, "SwapTotal: %d", &total))
1521 lpmem->dwTotalPageFile = total*1024;
1522 if (sscanf(buffer, "SwapFree: %d", &free))
1523 lpmem->dwAvailPageFile = free*1024;
1524 if (sscanf(buffer, "Buffers: %d", &buffers))
1525 lpmem->dwAvailPhys += buffers*1024;
1526 if (sscanf(buffer, "Cached: %d", &cached))
1527 lpmem->dwAvailPhys += cached*1024;
1531 if (lpmem->dwTotalPhys)
1533 lpmem->dwTotalVirtual = lpmem->dwTotalPhys+lpmem->dwTotalPageFile;
1534 lpmem->dwAvailVirtual = lpmem->dwAvailPhys+lpmem->dwAvailPageFile;
1535 lpmem->dwMemoryLoad = (lpmem->dwTotalVirtual-lpmem->dwAvailVirtual)
1536 / (lpmem->dwTotalVirtual / 100);
1541 /* FIXME: should do something for other systems */
1542 lpmem->dwMemoryLoad = 0;
1543 lpmem->dwTotalPhys = 16*1024*1024;
1544 lpmem->dwAvailPhys = 16*1024*1024;
1545 lpmem->dwTotalPageFile = 16*1024*1024;
1546 lpmem->dwAvailPageFile = 16*1024*1024;
1547 lpmem->dwTotalVirtual = 32*1024*1024;
1548 lpmem->dwAvailVirtual = 32*1024*1024;
1552 /**********************************************************************
1553 * WOWGlobalAllocLock (KERNEL32.62)
1555 * Combined GlobalAlloc and GlobalLock.
1557 SEGPTR WINAPI WOWGlobalAllocLock16(DWORD flags,DWORD cb,HGLOBAL16 *hmem)
1560 xhmem = GlobalAlloc16(flags,cb);
1561 if (hmem) *hmem = xhmem;
1562 return WIN16_GlobalLock16(xhmem);
1566 /**********************************************************************
1567 * WOWGlobalUnlockFree (KERNEL32.64)
1569 * Combined GlobalUnlock and GlobalFree.
1571 WORD WINAPI WOWGlobalUnlockFree16(DWORD vpmem) {
1572 if (!GlobalUnlock16(HIWORD(vpmem)))
1574 return GlobalFree16(HIWORD(vpmem));