2 * Global heap functions
4 * Copyright 1995 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 /* 0xffff sometimes seems to mean: CURRENT_DS */
23 #include "wine/port.h"
25 #include <sys/types.h>
33 #ifdef HAVE_SYS_PARAM_H
34 #include <sys/param.h>
36 #ifdef HAVE_SYS_SYSCTL_H
37 #include <sys/sysctl.h>
40 #include "wine/winbase16.h"
43 #include "kernel_private.h"
44 #include "kernel16_private.h"
45 #include "wine/debug.h"
47 WINE_DEFAULT_DEBUG_CHANNEL(global);
49 /* Global arena block */
52 void *base; /* Base address (0 if discarded) */
53 DWORD size; /* Size in bytes (0 indicates a free block) */
54 HGLOBAL16 handle; /* Handle for this block */
55 HGLOBAL16 hOwner; /* Owner of this block */
56 BYTE lockCount; /* Count of GlobalFix() calls */
57 BYTE pageLockCount; /* Count of GlobalPageLock() calls */
58 BYTE flags; /* Allocation flags */
59 BYTE selCount; /* Number of selectors allocated for this block */
62 /* Flags definitions */
63 #define GA_MOVEABLE 0x02 /* same as GMEM_MOVEABLE */
64 #define GA_DGROUP 0x04
65 #define GA_DISCARDABLE 0x08
66 #define GA_IPCSHARE 0x10 /* same as GMEM_DDESHARE */
67 #define GA_DOSMEM 0x20
69 /* Arena array (FIXME) */
70 static GLOBALARENA *pGlobalArena;
71 static int globalArenaSize;
73 #define GLOBAL_MAX_ALLOC_SIZE 0x00ff0000 /* Largest allocation is 16M - 64K */
75 #define VALID_HANDLE(handle) (((handle)>>__AHSHIFT)<globalArenaSize)
76 #define GET_ARENA_PTR(handle) (pGlobalArena + ((handle) >> __AHSHIFT))
78 static inline void* DOSMEM_AllocBlock(UINT size, UINT16* pseg)
80 if (!winedos.AllocDosBlock) load_winedos();
81 return winedos.AllocDosBlock ? winedos.AllocDosBlock(size, pseg) : NULL;
84 static inline BOOL DOSMEM_FreeBlock(void* ptr)
86 if (!winedos.FreeDosBlock) load_winedos();
87 return winedos.FreeDosBlock ? winedos.FreeDosBlock( ptr ) : FALSE;
90 static inline UINT DOSMEM_ResizeBlock(void *ptr, UINT size, BOOL exact)
92 if (!winedos.ResizeDosBlock) load_winedos();
93 return winedos.ResizeDosBlock ? winedos.ResizeDosBlock(ptr, size, TRUE) : 0;
96 static HANDLE get_win16_heap(void)
98 static HANDLE win16_heap;
100 /* we create global memory block with execute permission. The access can be limited
101 * for 16-bit code on selector level */
102 if (!win16_heap) win16_heap = HeapCreate(HEAP_CREATE_ENABLE_EXECUTE, 0, 0);
106 /***********************************************************************
109 * Return the arena for a given selector, growing the arena array if needed.
111 static GLOBALARENA *GLOBAL_GetArena( WORD sel, WORD selcount )
113 if (((sel >> __AHSHIFT) + selcount) > globalArenaSize)
115 int newsize = ((sel >> __AHSHIFT) + selcount + 0xff) & ~0xff;
116 GLOBALARENA *pNewArena = realloc( pGlobalArena,
117 newsize * sizeof(GLOBALARENA) );
118 if (!pNewArena) return 0;
119 pGlobalArena = pNewArena;
120 memset( pGlobalArena + globalArenaSize, 0,
121 (newsize - globalArenaSize) * sizeof(GLOBALARENA) );
122 globalArenaSize = newsize;
124 return pGlobalArena + (sel >> __AHSHIFT);
127 void debug_handles(void)
131 for (i = globalArenaSize-1 ; i>=0 ; i--) {
132 if (pGlobalArena[i].size!=0 && (pGlobalArena[i].handle & 0x8000)){
134 DPRINTF("0x%08x, ",pGlobalArena[i].handle);
142 /***********************************************************************
145 * Create a global heap block for a fixed range of linear memory.
147 HGLOBAL16 GLOBAL_CreateBlock( WORD flags, void *ptr, DWORD size,
148 HGLOBAL16 hOwner, unsigned char selflags )
153 /* Allocate the selector(s) */
155 sel = SELECTOR_AllocBlock( ptr, size, selflags );
157 selcount = (size + 0xffff) / 0x10000;
159 if (!(pArena = GLOBAL_GetArena( sel, selcount )))
161 SELECTOR_FreeBlock( sel );
165 /* Fill the arena block */
168 pArena->size = GetSelectorLimit16(sel) + 1;
169 pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
170 pArena->hOwner = hOwner;
171 pArena->lockCount = 0;
172 pArena->pageLockCount = 0;
173 pArena->flags = flags & GA_MOVEABLE;
174 if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
175 if (flags & GMEM_DDESHARE) pArena->flags |= GA_IPCSHARE;
176 if (!(selflags & (WINE_LDT_FLAGS_CODE^WINE_LDT_FLAGS_DATA))) pArena->flags |= GA_DGROUP;
177 pArena->selCount = selcount;
178 if (selcount > 1) /* clear the next arena blocks */
179 memset( pArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
181 return pArena->handle;
185 /***********************************************************************
188 * Free a block allocated by GLOBAL_CreateBlock, without touching
189 * the associated linear memory range.
191 BOOL16 GLOBAL_FreeBlock( HGLOBAL16 handle )
196 if (!handle) return TRUE;
197 sel = GlobalHandleToSel16( handle );
198 if (!VALID_HANDLE(sel)) return FALSE;
199 pArena = GET_ARENA_PTR(sel);
200 SELECTOR_FreeBlock( sel );
201 memset( pArena, 0, sizeof(GLOBALARENA) );
205 /***********************************************************************
208 BOOL16 GLOBAL_MoveBlock( HGLOBAL16 handle, void *ptr, DWORD size )
213 if (!handle) return TRUE;
214 sel = GlobalHandleToSel16( handle );
215 if (!VALID_HANDLE(sel)) return FALSE;
216 pArena = GET_ARENA_PTR(sel);
217 if (pArena->selCount != 1)
222 SELECTOR_ReallocBlock( sel, ptr, size );
226 /***********************************************************************
229 * Implementation of GlobalAlloc16()
231 HGLOBAL16 GLOBAL_Alloc( UINT16 flags, DWORD size, HGLOBAL16 hOwner, unsigned char selflags )
236 TRACE("%d flags=%04x\n", size, flags );
238 /* If size is 0, create a discarded block */
240 if (size == 0) return GLOBAL_CreateBlock( flags, NULL, 1, hOwner, selflags );
244 if (size >= GLOBAL_MAX_ALLOC_SIZE - 0x1f) return 0;
245 size = (size + 0x1f) & ~0x1f;
247 /* Allocate the linear memory */
248 ptr = HeapAlloc( get_win16_heap(), 0, size );
249 /* FIXME: free discardable blocks and try again? */
252 /* Allocate the selector(s) */
254 handle = GLOBAL_CreateBlock( flags, ptr, size, hOwner, selflags );
257 HeapFree( get_win16_heap(), 0, ptr );
261 if (flags & GMEM_ZEROINIT) memset( ptr, 0, size );
265 /***********************************************************************
266 * GlobalAlloc (KERNEL.15)
267 * GlobalAlloc16 (KERNEL32.24)
269 * Allocate a global memory object.
275 HGLOBAL16 WINAPI GlobalAlloc16(
276 UINT16 flags, /* [in] Object allocation attributes */
277 DWORD size /* [in] Number of bytes to allocate */
279 HANDLE16 owner = GetCurrentPDB16();
281 if (flags & GMEM_DDESHARE)
282 owner = GetExePtr(owner); /* Make it a module handle */
283 return GLOBAL_Alloc( flags, size, owner, WINE_LDT_FLAGS_DATA );
287 /***********************************************************************
288 * GlobalReAlloc (KERNEL.16)
290 * Change the size or attributes of a global memory object.
296 HGLOBAL16 WINAPI GlobalReAlloc16(
297 HGLOBAL16 handle, /* [in] Handle of global memory object */
298 DWORD size, /* [in] New size of block */
299 UINT16 flags /* [in] How to reallocate object */
304 GLOBALARENA *pArena, *pNewArena;
305 WORD sel = GlobalHandleToSel16( handle );
306 HANDLE heap = get_win16_heap();
308 TRACE("%04x %d flags=%04x\n",
309 handle, size, flags );
310 if (!handle) return 0;
312 if (!VALID_HANDLE(handle))
314 WARN("Invalid handle 0x%04x!\n", handle);
317 pArena = GET_ARENA_PTR( handle );
319 /* Discard the block if requested */
321 if ((size == 0) && (flags & GMEM_MOVEABLE) && !(flags & GMEM_MODIFY))
323 if (!(pArena->flags & GA_MOVEABLE) ||
324 !(pArena->flags & GA_DISCARDABLE) ||
325 (pArena->lockCount > 0) || (pArena->pageLockCount > 0)) return 0;
326 if (pArena->flags & GA_DOSMEM)
327 DOSMEM_FreeBlock( pArena->base );
329 HeapFree( heap, 0, pArena->base );
332 /* Note: we rely on the fact that SELECTOR_ReallocBlock won't
333 * change the selector if we are shrinking the block.
334 * FIXME: shouldn't we keep selectors until the block is deleted?
336 SELECTOR_ReallocBlock( sel, 0, 1 );
342 if (size > GLOBAL_MAX_ALLOC_SIZE - 0x20) return 0;
343 if (size == 0) size = 0x20;
344 else size = (size + 0x1f) & ~0x1f;
346 /* Change the flags */
348 if (flags & GMEM_MODIFY)
350 /* Change the flags, leaving GA_DGROUP alone */
351 pArena->flags = (pArena->flags & GA_DGROUP) | (flags & GA_MOVEABLE);
352 if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
356 /* Reallocate the linear memory */
359 oldsize = pArena->size;
360 TRACE("oldbase %p oldsize %08x newsize %08x\n", ptr,oldsize,size);
361 if (ptr && (size == oldsize)) return handle; /* Nothing to do */
363 if (pArena->flags & GA_DOSMEM)
365 if (DOSMEM_ResizeBlock(ptr, size, TRUE) == size)
367 else if(pArena->pageLockCount > 0)
371 newptr = DOSMEM_AllocBlock( size, 0 );
374 memcpy( newptr, ptr, oldsize );
375 DOSMEM_FreeBlock( ptr );
382 * if more than one reader (e.g. some pointer has been
383 * given out by GetVDMPointer32W16),
384 * only try to realloc in place
388 newptr = HeapReAlloc( heap,
389 (pArena->pageLockCount > 0) ? HEAP_REALLOC_IN_PLACE_ONLY : 0,
392 newptr = HeapAlloc( heap, 0, size );
398 FIXME("Realloc failed lock %d\n",pArena->pageLockCount);
399 if (pArena->pageLockCount <1)
401 if (pArena->flags & GA_DOSMEM)
402 DOSMEM_FreeBlock( pArena->base );
404 HeapFree( heap, 0, ptr );
405 SELECTOR_FreeBlock( sel );
406 memset( pArena, 0, sizeof(GLOBALARENA) );
412 /* Reallocate the selector(s) */
414 sel = SELECTOR_ReallocBlock( sel, ptr, size );
417 if (pArena->flags & GA_DOSMEM)
418 DOSMEM_FreeBlock( pArena->base );
420 HeapFree( heap, 0, ptr );
421 memset( pArena, 0, sizeof(GLOBALARENA) );
424 selcount = (size + 0xffff) / 0x10000;
426 if (!(pNewArena = GLOBAL_GetArena( sel, selcount )))
428 if (pArena->flags & GA_DOSMEM)
429 DOSMEM_FreeBlock( pArena->base );
431 HeapFree( heap, 0, ptr );
432 SELECTOR_FreeBlock( sel );
436 /* Fill the new arena block
437 As we may have used HEAP_REALLOC_IN_PLACE_ONLY, areas may overlap*/
439 if (pNewArena != pArena) memmove( pNewArena, pArena, sizeof(GLOBALARENA) );
440 pNewArena->base = ptr;
441 pNewArena->size = GetSelectorLimit16(sel) + 1;
442 pNewArena->selCount = selcount;
443 pNewArena->handle = (pNewArena->flags & GA_MOVEABLE) ? sel - 1 : sel;
445 if (selcount > 1) /* clear the next arena blocks */
446 memset( pNewArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
448 if ((oldsize < size) && (flags & GMEM_ZEROINIT))
449 memset( (char *)ptr + oldsize, 0, size - oldsize );
450 return pNewArena->handle;
454 /***********************************************************************
455 * GlobalFree (KERNEL.17)
456 * GlobalFree16 (KERNEL32.31)
461 HGLOBAL16 WINAPI GlobalFree16(
462 HGLOBAL16 handle /* [in] Handle of global memory object */
466 if (!VALID_HANDLE(handle))
468 WARN("Invalid handle 0x%04x passed to GlobalFree16!\n",handle);
471 ptr = GET_ARENA_PTR(handle)->base;
473 TRACE("%04x\n", handle );
474 if (!GLOBAL_FreeBlock( handle )) return handle; /* failed */
475 HeapFree( get_win16_heap(), 0, ptr );
480 /**********************************************************************
481 * K32WOWGlobalLock16 (KERNEL32.60)
483 SEGPTR WINAPI K32WOWGlobalLock16( HGLOBAL16 handle )
485 WORD sel = GlobalHandleToSel16( handle );
486 TRACE("(%04x) -> %08x\n", handle, MAKELONG( 0, sel ) );
490 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
492 if (!VALID_HANDLE(handle)) {
493 WARN("Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle);
496 else if (!GET_ARENA_PTR(handle)->base)
499 GET_ARENA_PTR(handle)->lockCount++;
502 return MAKESEGPTR( sel, 0 );
507 /***********************************************************************
508 * GlobalLock (KERNEL.18)
510 * This is the GlobalLock16() function used by 16-bit code.
512 SEGPTR WINAPI WIN16_GlobalLock16( HGLOBAL16 handle )
514 SEGPTR ret = K32WOWGlobalLock16( handle );
515 CURRENT_STACK16->ecx = SELECTOROF(ret); /* selector must be returned in CX as well */
520 /***********************************************************************
521 * GlobalLock16 (KERNEL32.25)
523 * This is the GlobalLock16() function used by 32-bit code.
526 * Pointer to first byte of memory block
529 LPVOID WINAPI GlobalLock16(
530 HGLOBAL16 handle /* [in] Handle of global memory object */
532 if (!handle) return 0;
533 if (!VALID_HANDLE(handle))
535 GET_ARENA_PTR(handle)->lockCount++;
536 return GET_ARENA_PTR(handle)->base;
540 /***********************************************************************
541 * GlobalUnlock (KERNEL.19)
542 * GlobalUnlock16 (KERNEL32.26)
544 * Should the return values be cast to booleans?
547 * TRUE: Object is still locked
548 * FALSE: Object is unlocked
550 BOOL16 WINAPI GlobalUnlock16(
551 HGLOBAL16 handle /* [in] Handle of global memory object */
553 GLOBALARENA *pArena = GET_ARENA_PTR(handle);
554 if (!VALID_HANDLE(handle)) {
555 WARN("Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle);
558 TRACE("%04x\n", handle );
559 if (pArena->lockCount) pArena->lockCount--;
560 return pArena->lockCount;
563 /***********************************************************************
564 * GlobalChangeLockCount (KERNEL.365)
566 * This is declared as a register function as it has to preserve
567 * *all* registers, even AX/DX !
570 void WINAPI GlobalChangeLockCount16( HGLOBAL16 handle, INT16 delta,
574 GlobalLock16( handle );
575 else if ( delta == -1 )
576 GlobalUnlock16( handle );
578 ERR("(%04X, %d): strange delta value\n", handle, delta );
581 /***********************************************************************
582 * GlobalSize (KERNEL.20)
583 * GlobalSize16 (KERNEL32.32)
585 * Get the current size of a global memory object.
588 * Size in bytes of object
591 DWORD WINAPI GlobalSize16(
592 HGLOBAL16 handle /* [in] Handle of global memory object */
594 TRACE("%04x\n", handle );
595 if (!handle) return 0;
596 if (!VALID_HANDLE(handle))
598 return GET_ARENA_PTR(handle)->size;
602 /***********************************************************************
603 * GlobalHandle (KERNEL.21)
605 * Get the handle associated with a pointer to the global memory block.
608 * Why is GlobalHandleToSel used here with the sel as input?
614 DWORD WINAPI GlobalHandle16(
615 WORD sel /* [in] Address of global memory block */
617 TRACE("%04x\n", sel );
618 if (!VALID_HANDLE(sel)) {
619 WARN("Invalid handle 0x%04x passed to GlobalHandle16!\n",sel);
622 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
625 /***********************************************************************
626 * GlobalHandleNoRIP (KERNEL.159)
628 DWORD WINAPI GlobalHandleNoRIP16( WORD sel )
631 for (i = globalArenaSize-1 ; i>=0 ; i--) {
632 if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == sel)
633 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
639 /***********************************************************************
640 * GlobalFlags (KERNEL.22)
642 * Get information about a global memory object.
645 * Should this return GMEM_INVALID_HANDLE instead of 0 on invalid
649 * Value specifying flags and lock count
650 * GMEM_INVALID_HANDLE: Invalid handle
652 UINT16 WINAPI GlobalFlags16(
653 HGLOBAL16 handle /* [in] Handle of global memory object */
657 TRACE("%04x\n", handle );
658 if (!VALID_HANDLE(handle)) {
659 WARN("Invalid handle 0x%04x passed to GlobalFlags16!\n",handle);
662 pArena = GET_ARENA_PTR(handle);
663 return pArena->lockCount |
664 ((pArena->flags & GA_DISCARDABLE) ? GMEM_DISCARDABLE : 0) |
665 ((pArena->base == 0) ? GMEM_DISCARDED : 0);
669 /***********************************************************************
670 * LockSegment (KERNEL.23)
672 HGLOBAL16 WINAPI LockSegment16( HGLOBAL16 handle )
674 TRACE("%04x\n", handle );
675 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
676 if (!VALID_HANDLE(handle)) {
677 WARN("Invalid handle 0x%04x passed to LockSegment16!\n",handle);
680 GET_ARENA_PTR(handle)->lockCount++;
685 /***********************************************************************
686 * UnlockSegment (KERNEL.24)
688 void WINAPI UnlockSegment16( HGLOBAL16 handle )
690 TRACE("%04x\n", handle );
691 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
692 if (!VALID_HANDLE(handle)) {
693 WARN("Invalid handle 0x%04x passed to UnlockSegment16!\n",handle);
696 GET_ARENA_PTR(handle)->lockCount--;
697 /* FIXME: this ought to return the lock count in CX (go figure...) */
701 /***********************************************************************
702 * GlobalCompact (KERNEL.25)
704 DWORD WINAPI GlobalCompact16( DWORD desired )
706 return GLOBAL_MAX_ALLOC_SIZE;
710 /***********************************************************************
711 * GlobalFreeAll (KERNEL.26)
713 void WINAPI GlobalFreeAll16( HGLOBAL16 owner )
718 pArena = pGlobalArena;
719 for (i = 0; i < globalArenaSize; i++, pArena++)
721 if ((pArena->size != 0) && (pArena->hOwner == owner))
722 GlobalFree16( pArena->handle );
727 /***********************************************************************
728 * GlobalWire (KERNEL.111)
729 * GlobalWire16 (KERNEL32.29)
731 SEGPTR WINAPI GlobalWire16( HGLOBAL16 handle )
733 return WIN16_GlobalLock16( handle );
737 /***********************************************************************
738 * GlobalUnWire (KERNEL.112)
739 * GlobalUnWire16 (KERNEL32.30)
741 BOOL16 WINAPI GlobalUnWire16( HGLOBAL16 handle )
743 return !GlobalUnlock16( handle );
747 /***********************************************************************
748 * SetSwapAreaSize (KERNEL.106)
750 LONG WINAPI SetSwapAreaSize16( WORD size )
752 FIXME("(%d) - stub!\n", size );
753 return MAKELONG( size, 0xffff );
757 /***********************************************************************
758 * GlobalLRUOldest (KERNEL.163)
760 HGLOBAL16 WINAPI GlobalLRUOldest16( HGLOBAL16 handle )
762 TRACE("%04x\n", handle );
763 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
768 /***********************************************************************
769 * GlobalLRUNewest (KERNEL.164)
771 HGLOBAL16 WINAPI GlobalLRUNewest16( HGLOBAL16 handle )
773 TRACE("%04x\n", handle );
774 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
779 /***********************************************************************
780 * GetFreeSpace (KERNEL.169)
782 DWORD WINAPI GetFreeSpace16( UINT16 wFlags )
785 GlobalMemoryStatus( &ms );
786 return ms.dwAvailVirtual;
789 /***********************************************************************
790 * GlobalDOSAlloc (KERNEL.184)
792 * Allocate memory in the first MB.
795 * Address (HW=Paragraph segment; LW=Selector)
797 DWORD WINAPI GlobalDOSAlloc16(
798 DWORD size /* [in] Number of bytes to be allocated */
801 LPVOID lpBlock = DOSMEM_AllocBlock( size, &uParagraph );
805 HMODULE16 hModule = GetModuleHandle16("KERNEL");
809 wSelector = GLOBAL_CreateBlock(GMEM_FIXED, lpBlock, size, hModule, WINE_LDT_FLAGS_DATA );
810 pArena = GET_ARENA_PTR(wSelector);
811 pArena->flags |= GA_DOSMEM;
812 return MAKELONG(wSelector,uParagraph);
818 /***********************************************************************
819 * GlobalDOSFree (KERNEL.185)
821 * Free memory allocated with GlobalDOSAlloc
827 WORD WINAPI GlobalDOSFree16(
828 WORD sel /* [in] Selector */
830 DWORD block = GetSelectorBase(sel);
832 if( block && block < 0x100000 )
834 LPVOID lpBlock = DOSMEM_MapDosToLinear( block );
835 if( DOSMEM_FreeBlock( lpBlock ) )
836 GLOBAL_FreeBlock( sel );
843 /***********************************************************************
844 * GlobalPageLock (KERNEL.191)
845 * GlobalSmartPageLock(KERNEL.230)
847 WORD WINAPI GlobalPageLock16( HGLOBAL16 handle )
849 TRACE("%04x\n", handle );
850 if (!VALID_HANDLE(handle)) {
851 WARN("Invalid handle 0x%04x passed to GlobalPageLock!\n",handle);
854 return ++(GET_ARENA_PTR(handle)->pageLockCount);
858 /***********************************************************************
859 * GlobalPageUnlock (KERNEL.192)
860 * GlobalSmartPageUnlock(KERNEL.231)
862 WORD WINAPI GlobalPageUnlock16( HGLOBAL16 handle )
864 TRACE("%04x\n", handle );
865 if (!VALID_HANDLE(handle)) {
866 WARN("Invalid handle 0x%04x passed to GlobalPageUnlock!\n",handle);
869 return --(GET_ARENA_PTR(handle)->pageLockCount);
873 /***********************************************************************
874 * GlobalFix (KERNEL.197)
875 * GlobalFix16 (KERNEL32.27)
877 WORD WINAPI GlobalFix16( HGLOBAL16 handle )
879 TRACE("%04x\n", handle );
880 if (!VALID_HANDLE(handle)) {
881 WARN("Invalid handle 0x%04x passed to GlobalFix16!\n",handle);
884 GET_ARENA_PTR(handle)->lockCount++;
886 return GlobalHandleToSel16(handle);
890 /***********************************************************************
891 * GlobalUnfix (KERNEL.198)
892 * GlobalUnfix16 (KERNEL32.28)
894 void WINAPI GlobalUnfix16( HGLOBAL16 handle )
896 TRACE("%04x\n", handle );
897 if (!VALID_HANDLE(handle)) {
898 WARN("Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle);
901 GET_ARENA_PTR(handle)->lockCount--;
905 /***********************************************************************
906 * FarSetOwner (KERNEL.403)
908 void WINAPI FarSetOwner16( HGLOBAL16 handle, HANDLE16 hOwner )
910 if (!VALID_HANDLE(handle)) {
911 WARN("Invalid handle 0x%04x passed to FarSetOwner!\n",handle);
914 GET_ARENA_PTR(handle)->hOwner = hOwner;
918 /***********************************************************************
919 * FarGetOwner (KERNEL.404)
921 HANDLE16 WINAPI FarGetOwner16( HGLOBAL16 handle )
923 if (!VALID_HANDLE(handle)) {
924 WARN("Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
927 return GET_ARENA_PTR(handle)->hOwner;
931 /************************************************************************
932 * GlobalMasterHandle (KERNEL.28)
935 * Should return selector and handle of the information structure for
936 * the global heap. selector and handle are stored in the THHOOK as
937 * pGlobalHeap and hGlobalHeap.
938 * As Wine doesn't have this structure, we return both values as zero
939 * Applications should interpret this as "No Global Heap"
941 DWORD WINAPI GlobalMasterHandle16(void)
947 /***********************************************************************
948 * GlobalHandleToSel (TOOLHELP.50)
950 WORD WINAPI GlobalHandleToSel16( HGLOBAL16 handle )
952 if (!handle) return 0;
953 if (!VALID_HANDLE(handle)) {
954 WARN("Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle);
959 WARN("Program attempted invalid selector conversion\n" );
966 /***********************************************************************
967 * GlobalFirst (TOOLHELP.51)
969 BOOL16 WINAPI GlobalFirst16( GLOBALENTRY *pGlobal, WORD wFlags )
971 if (wFlags == GLOBAL_LRU) return FALSE;
973 return GlobalNext16( pGlobal, wFlags );
977 /***********************************************************************
978 * GlobalNext (TOOLHELP.52)
980 BOOL16 WINAPI GlobalNext16( GLOBALENTRY *pGlobal, WORD wFlags)
984 if (pGlobal->dwNext >= globalArenaSize) return FALSE;
985 pArena = pGlobalArena + pGlobal->dwNext;
986 if (wFlags == GLOBAL_FREE) /* only free blocks */
989 for (i = pGlobal->dwNext; i < globalArenaSize; i++, pArena++)
990 if (pArena->size == 0) break; /* block is free */
991 if (i >= globalArenaSize) return FALSE;
995 pGlobal->dwAddress = (DWORD_PTR)pArena->base;
996 pGlobal->dwBlockSize = pArena->size;
997 pGlobal->hBlock = pArena->handle;
998 pGlobal->wcLock = pArena->lockCount;
999 pGlobal->wcPageLock = pArena->pageLockCount;
1000 pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
1001 pGlobal->wHeapPresent = FALSE;
1002 pGlobal->hOwner = pArena->hOwner;
1003 pGlobal->wType = GT_UNKNOWN;
1010 /***********************************************************************
1011 * GlobalInfo (TOOLHELP.53)
1013 BOOL16 WINAPI GlobalInfo16( GLOBALINFO *pInfo )
1016 GLOBALARENA *pArena;
1018 pInfo->wcItems = globalArenaSize;
1019 pInfo->wcItemsFree = 0;
1020 pInfo->wcItemsLRU = 0;
1021 for (i = 0, pArena = pGlobalArena; i < globalArenaSize; i++, pArena++)
1022 if (pArena->size == 0) pInfo->wcItemsFree++;
1027 /***********************************************************************
1028 * GlobalEntryHandle (TOOLHELP.54)
1030 BOOL16 WINAPI GlobalEntryHandle16( GLOBALENTRY *pGlobal, HGLOBAL16 hItem )
1032 GLOBALARENA *pArena = GET_ARENA_PTR(hItem);
1034 pGlobal->dwAddress = (DWORD_PTR)pArena->base;
1035 pGlobal->dwBlockSize = pArena->size;
1036 pGlobal->hBlock = pArena->handle;
1037 pGlobal->wcLock = pArena->lockCount;
1038 pGlobal->wcPageLock = pArena->pageLockCount;
1039 pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
1040 pGlobal->wHeapPresent = FALSE;
1041 pGlobal->hOwner = pArena->hOwner;
1042 pGlobal->wType = GT_UNKNOWN;
1049 /***********************************************************************
1050 * GlobalEntryModule (TOOLHELP.55)
1052 BOOL16 WINAPI GlobalEntryModule16( GLOBALENTRY *pGlobal, HMODULE16 hModule,
1055 FIXME("(%p, 0x%04x, 0x%04x), stub.\n", pGlobal, hModule, wSeg);
1060 /***********************************************************************
1061 * MemManInfo (TOOLHELP.72)
1063 BOOL16 WINAPI MemManInfo16( MEMMANINFO *info )
1065 MEMORYSTATUS status;
1068 * Not unsurprisingly although the documention says you
1069 * _must_ provide the size in the dwSize field, this function
1070 * (under Windows) always fills the structure and returns true.
1072 GlobalMemoryStatus( &status );
1073 info->wPageSize = getpagesize();
1074 info->dwLargestFreeBlock = status.dwAvailVirtual;
1075 info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
1076 info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
1077 info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
1078 info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
1079 info->dwFreePages = info->dwMaxPagesAvailable;
1080 info->dwTotalPages = info->dwTotalLinearSpace;
1081 info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
1082 info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
1086 /***********************************************************************
1087 * GetFreeMemInfo (KERNEL.316)
1089 DWORD WINAPI GetFreeMemInfo16(void)
1092 MemManInfo16( &info );
1093 return MAKELONG( info.dwTotalLinearSpace, info.dwMaxPagesAvailable );
1096 /***********************************************************************
1097 * A20Proc (KERNEL.165)
1099 void WINAPI A20Proc16( WORD unused )
1101 /* this is also a NOP in Windows */
1104 /***********************************************************************
1105 * LimitEMSPages (KERNEL.156)
1107 DWORD WINAPI LimitEMSPages16( DWORD unused )