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"
48 WINE_DEFAULT_DEBUG_CHANNEL(global);
50 /* Global arena block */
53 DWORD_PTR base; /* Base address (0 if discarded) */
54 DWORD size; /* Size in bytes (0 indicates a free block) */
55 HGLOBAL16 handle; /* Handle for this block */
56 HGLOBAL16 hOwner; /* Owner of this block */
57 BYTE lockCount; /* Count of GlobalFix() calls */
58 BYTE pageLockCount; /* Count of GlobalPageLock() calls */
59 BYTE flags; /* Allocation flags */
60 BYTE selCount; /* Number of selectors allocated for this block */
63 /* Flags definitions */
64 #define GA_MOVEABLE 0x02 /* same as GMEM_MOVEABLE */
65 #define GA_DGROUP 0x04
66 #define GA_DISCARDABLE 0x08
67 #define GA_IPCSHARE 0x10 /* same as GMEM_DDESHARE */
68 #define GA_DOSMEM 0x20
70 /* Arena array (FIXME) */
71 static GLOBALARENA *pGlobalArena;
72 static int globalArenaSize;
74 #define GLOBAL_MAX_ALLOC_SIZE 0x00ff0000 /* Largest allocation is 16M - 64K */
76 #define VALID_HANDLE(handle) (((handle)>>__AHSHIFT)<globalArenaSize)
77 #define GET_ARENA_PTR(handle) (pGlobalArena + ((handle) >> __AHSHIFT))
79 static inline void* DOSMEM_AllocBlock(UINT size, UINT16* pseg)
81 if (!winedos.AllocDosBlock) load_winedos();
82 return winedos.AllocDosBlock ? winedos.AllocDosBlock(size, pseg) : NULL;
85 static inline BOOL DOSMEM_FreeBlock(void* ptr)
87 if (!winedos.FreeDosBlock) load_winedos();
88 return winedos.FreeDosBlock ? winedos.FreeDosBlock( ptr ) : FALSE;
91 static inline UINT DOSMEM_ResizeBlock(void *ptr, UINT size, BOOL exact)
93 if (!winedos.ResizeDosBlock) load_winedos();
94 return winedos.ResizeDosBlock ? winedos.ResizeDosBlock(ptr, size, TRUE) : 0;
97 /***********************************************************************
100 * Return the arena for a given selector, growing the arena array if needed.
102 static GLOBALARENA *GLOBAL_GetArena( WORD sel, WORD selcount )
104 if (((sel >> __AHSHIFT) + selcount) > globalArenaSize)
106 int newsize = ((sel >> __AHSHIFT) + selcount + 0xff) & ~0xff;
107 GLOBALARENA *pNewArena = realloc( pGlobalArena,
108 newsize * sizeof(GLOBALARENA) );
109 if (!pNewArena) return 0;
110 pGlobalArena = pNewArena;
111 memset( pGlobalArena + globalArenaSize, 0,
112 (newsize - globalArenaSize) * sizeof(GLOBALARENA) );
113 globalArenaSize = newsize;
115 return pGlobalArena + (sel >> __AHSHIFT);
118 void debug_handles(void)
122 for (i = globalArenaSize-1 ; i>=0 ; i--) {
123 if (pGlobalArena[i].size!=0 && (pGlobalArena[i].handle & 0x8000)){
125 DPRINTF("0x%08x, ",pGlobalArena[i].handle);
133 /***********************************************************************
136 * Create a global heap block for a fixed range of linear memory.
138 HGLOBAL16 GLOBAL_CreateBlock( WORD flags, const void *ptr, DWORD size,
139 HGLOBAL16 hOwner, unsigned char selflags )
144 /* Allocate the selector(s) */
146 sel = SELECTOR_AllocBlock( ptr, size, selflags );
148 selcount = (size + 0xffff) / 0x10000;
150 if (!(pArena = GLOBAL_GetArena( sel, selcount )))
152 SELECTOR_FreeBlock( sel );
156 /* Fill the arena block */
158 pArena->base = (DWORD_PTR)ptr;
159 pArena->size = GetSelectorLimit16(sel) + 1;
160 pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
161 pArena->hOwner = hOwner;
162 pArena->lockCount = 0;
163 pArena->pageLockCount = 0;
164 pArena->flags = flags & GA_MOVEABLE;
165 if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
166 if (flags & GMEM_DDESHARE) pArena->flags |= GA_IPCSHARE;
167 if (!(selflags & (WINE_LDT_FLAGS_CODE^WINE_LDT_FLAGS_DATA))) pArena->flags |= GA_DGROUP;
168 pArena->selCount = selcount;
169 if (selcount > 1) /* clear the next arena blocks */
170 memset( pArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
172 return pArena->handle;
176 /***********************************************************************
179 * Free a block allocated by GLOBAL_CreateBlock, without touching
180 * the associated linear memory range.
182 BOOL16 GLOBAL_FreeBlock( HGLOBAL16 handle )
187 if (!handle) return TRUE;
188 sel = GlobalHandleToSel16( handle );
189 if (!VALID_HANDLE(sel)) return FALSE;
190 pArena = GET_ARENA_PTR(sel);
191 SELECTOR_FreeBlock( sel );
192 memset( pArena, 0, sizeof(GLOBALARENA) );
196 /***********************************************************************
199 BOOL16 GLOBAL_MoveBlock( HGLOBAL16 handle, const void *ptr, DWORD size )
204 if (!handle) return TRUE;
205 sel = GlobalHandleToSel16( handle );
206 if (!VALID_HANDLE(sel)) return FALSE;
207 pArena = GET_ARENA_PTR(sel);
208 if (pArena->selCount != 1)
211 pArena->base = (DWORD)ptr;
213 SELECTOR_ReallocBlock( sel, ptr, size );
217 /***********************************************************************
220 * Implementation of GlobalAlloc16()
222 HGLOBAL16 GLOBAL_Alloc( UINT16 flags, DWORD size, HGLOBAL16 hOwner, unsigned char selflags )
227 TRACE("%d flags=%04x\n", size, flags );
229 /* If size is 0, create a discarded block */
231 if (size == 0) return GLOBAL_CreateBlock( flags, NULL, 1, hOwner, selflags );
235 if (size >= GLOBAL_MAX_ALLOC_SIZE - 0x1f) return 0;
236 size = (size + 0x1f) & ~0x1f;
238 /* Allocate the linear memory */
239 ptr = HeapAlloc( GetProcessHeap(), 0, size );
240 /* FIXME: free discardable blocks and try again? */
243 /* Allocate the selector(s) */
245 handle = GLOBAL_CreateBlock( flags, ptr, size, hOwner, selflags );
248 HeapFree( GetProcessHeap(), 0, ptr );
252 if (flags & GMEM_ZEROINIT) memset( ptr, 0, size );
256 /***********************************************************************
257 * GlobalAlloc (KERNEL.15)
258 * GlobalAlloc16 (KERNEL32.24)
260 * Allocate a global memory object.
266 HGLOBAL16 WINAPI GlobalAlloc16(
267 UINT16 flags, /* [in] Object allocation attributes */
268 DWORD size /* [in] Number of bytes to allocate */
270 HANDLE16 owner = GetCurrentPDB16();
272 if (flags & GMEM_DDESHARE)
273 owner = GetExePtr(owner); /* Make it a module handle */
274 return GLOBAL_Alloc( flags, size, owner, WINE_LDT_FLAGS_DATA );
278 /***********************************************************************
279 * GlobalReAlloc (KERNEL.16)
281 * Change the size or attributes of a global memory object.
287 HGLOBAL16 WINAPI GlobalReAlloc16(
288 HGLOBAL16 handle, /* [in] Handle of global memory object */
289 DWORD size, /* [in] New size of block */
290 UINT16 flags /* [in] How to reallocate object */
295 GLOBALARENA *pArena, *pNewArena;
296 WORD sel = GlobalHandleToSel16( handle );
298 TRACE("%04x %d flags=%04x\n",
299 handle, size, flags );
300 if (!handle) return 0;
302 if (!VALID_HANDLE(handle))
304 WARN("Invalid handle 0x%04x!\n", handle);
307 pArena = GET_ARENA_PTR( handle );
309 /* Discard the block if requested */
311 if ((size == 0) && (flags & GMEM_MOVEABLE) && !(flags & GMEM_MODIFY))
313 if (!(pArena->flags & GA_MOVEABLE) ||
314 !(pArena->flags & GA_DISCARDABLE) ||
315 (pArena->lockCount > 0) || (pArena->pageLockCount > 0)) return 0;
316 if (pArena->flags & GA_DOSMEM)
317 DOSMEM_FreeBlock( (void *)pArena->base );
319 HeapFree( GetProcessHeap(), 0, (void *)pArena->base );
322 /* Note: we rely on the fact that SELECTOR_ReallocBlock won't
323 * change the selector if we are shrinking the block.
324 * FIXME: shouldn't we keep selectors until the block is deleted?
326 SELECTOR_ReallocBlock( sel, 0, 1 );
332 if (size > GLOBAL_MAX_ALLOC_SIZE - 0x20) return 0;
333 if (size == 0) size = 0x20;
334 else size = (size + 0x1f) & ~0x1f;
336 /* Change the flags */
338 if (flags & GMEM_MODIFY)
340 /* Change the flags, leaving GA_DGROUP alone */
341 pArena->flags = (pArena->flags & GA_DGROUP) | (flags & GA_MOVEABLE);
342 if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
346 /* Reallocate the linear memory */
348 ptr = (void *)pArena->base;
349 oldsize = pArena->size;
350 TRACE("oldbase %p oldsize %08x newsize %08x\n", ptr,oldsize,size);
351 if (ptr && (size == oldsize)) return handle; /* Nothing to do */
353 if (pArena->flags & GA_DOSMEM)
355 if (DOSMEM_ResizeBlock(ptr, size, TRUE) == size)
357 else if(pArena->pageLockCount > 0)
361 newptr = DOSMEM_AllocBlock( size, 0 );
364 memcpy( newptr, ptr, oldsize );
365 DOSMEM_FreeBlock( ptr );
372 * if more than one reader (e.g. some pointer has been
373 * given out by GetVDMPointer32W16),
374 * only try to realloc in place
378 newptr = HeapReAlloc( GetProcessHeap(),
379 (pArena->pageLockCount > 0) ? HEAP_REALLOC_IN_PLACE_ONLY : 0,
382 newptr = HeapAlloc( GetProcessHeap(),
383 (pArena->pageLockCount > 0) ? HEAP_REALLOC_IN_PLACE_ONLY : 0,
390 FIXME("Realloc failed lock %d\n",pArena->pageLockCount);
391 if (pArena->pageLockCount <1)
393 if (pArena->flags & GA_DOSMEM)
394 DOSMEM_FreeBlock( (void *)pArena->base );
396 HeapFree( GetProcessHeap(), 0, ptr );
397 SELECTOR_FreeBlock( sel );
398 memset( pArena, 0, sizeof(GLOBALARENA) );
404 /* Reallocate the selector(s) */
406 sel = SELECTOR_ReallocBlock( sel, ptr, size );
409 if (pArena->flags & GA_DOSMEM)
410 DOSMEM_FreeBlock( (void *)pArena->base );
412 HeapFree( GetProcessHeap(), 0, ptr );
413 memset( pArena, 0, sizeof(GLOBALARENA) );
416 selcount = (size + 0xffff) / 0x10000;
418 if (!(pNewArena = GLOBAL_GetArena( sel, selcount )))
420 if (pArena->flags & GA_DOSMEM)
421 DOSMEM_FreeBlock( (void *)pArena->base );
423 HeapFree( GetProcessHeap(), 0, ptr );
424 SELECTOR_FreeBlock( sel );
428 /* Fill the new arena block
429 As we may have used HEAP_REALLOC_IN_PLACE_ONLY, areas may overlap*/
431 if (pNewArena != pArena) memmove( pNewArena, pArena, sizeof(GLOBALARENA) );
432 pNewArena->base = (DWORD)ptr;
433 pNewArena->size = GetSelectorLimit16(sel) + 1;
434 pNewArena->selCount = selcount;
435 pNewArena->handle = (pNewArena->flags & GA_MOVEABLE) ? sel - 1 : sel;
437 if (selcount > 1) /* clear the next arena blocks */
438 memset( pNewArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
440 if ((oldsize < size) && (flags & GMEM_ZEROINIT))
441 memset( (char *)ptr + oldsize, 0, size - oldsize );
442 return pNewArena->handle;
446 /***********************************************************************
447 * GlobalFree (KERNEL.17)
448 * GlobalFree16 (KERNEL32.31)
453 HGLOBAL16 WINAPI GlobalFree16(
454 HGLOBAL16 handle /* [in] Handle of global memory object */
458 if (!VALID_HANDLE(handle))
460 WARN("Invalid handle 0x%04x passed to GlobalFree16!\n",handle);
463 ptr = (void *)GET_ARENA_PTR(handle)->base;
465 TRACE("%04x\n", handle );
466 if (!GLOBAL_FreeBlock( handle )) return handle; /* failed */
467 HeapFree( GetProcessHeap(), 0, ptr );
472 /**********************************************************************
473 * K32WOWGlobalLock16 (KERNEL32.60)
475 SEGPTR WINAPI K32WOWGlobalLock16( HGLOBAL16 handle )
477 WORD sel = GlobalHandleToSel16( handle );
478 TRACE("(%04x) -> %08x\n", handle, MAKELONG( 0, sel ) );
482 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
484 if (!VALID_HANDLE(handle)) {
485 WARN("Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle);
488 else if (!GET_ARENA_PTR(handle)->base)
491 GET_ARENA_PTR(handle)->lockCount++;
494 return MAKESEGPTR( sel, 0 );
499 /***********************************************************************
500 * GlobalLock (KERNEL.18)
502 * This is the GlobalLock16() function used by 16-bit code.
504 SEGPTR WINAPI WIN16_GlobalLock16( HGLOBAL16 handle )
506 SEGPTR ret = K32WOWGlobalLock16( handle );
507 CURRENT_STACK16->ecx = SELECTOROF(ret); /* selector must be returned in CX as well */
512 /***********************************************************************
513 * GlobalLock16 (KERNEL32.25)
515 * This is the GlobalLock16() function used by 32-bit code.
518 * Pointer to first byte of memory block
521 LPVOID WINAPI GlobalLock16(
522 HGLOBAL16 handle /* [in] Handle of global memory object */
524 if (!handle) return 0;
525 if (!VALID_HANDLE(handle))
527 GET_ARENA_PTR(handle)->lockCount++;
528 return (LPVOID)GET_ARENA_PTR(handle)->base;
532 /***********************************************************************
533 * GlobalUnlock (KERNEL.19)
534 * GlobalUnlock16 (KERNEL32.26)
536 * Should the return values be cast to booleans?
539 * TRUE: Object is still locked
540 * FALSE: Object is unlocked
542 BOOL16 WINAPI GlobalUnlock16(
543 HGLOBAL16 handle /* [in] Handle of global memory object */
545 GLOBALARENA *pArena = GET_ARENA_PTR(handle);
546 if (!VALID_HANDLE(handle)) {
547 WARN("Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle);
550 TRACE("%04x\n", handle );
551 if (pArena->lockCount) pArena->lockCount--;
552 return pArena->lockCount;
555 /***********************************************************************
556 * GlobalChangeLockCount (KERNEL.365)
558 * This is declared as a register function as it has to preserve
559 * *all* registers, even AX/DX !
562 void WINAPI GlobalChangeLockCount16( HGLOBAL16 handle, INT16 delta,
566 GlobalLock16( handle );
567 else if ( delta == -1 )
568 GlobalUnlock16( handle );
570 ERR("(%04X, %d): strange delta value\n", handle, delta );
573 /***********************************************************************
574 * GlobalSize (KERNEL.20)
575 * GlobalSize16 (KERNEL32.32)
577 * Get the current size of a global memory object.
580 * Size in bytes of object
583 DWORD WINAPI GlobalSize16(
584 HGLOBAL16 handle /* [in] Handle of global memory object */
586 TRACE("%04x\n", handle );
587 if (!handle) return 0;
588 if (!VALID_HANDLE(handle))
590 return GET_ARENA_PTR(handle)->size;
594 /***********************************************************************
595 * GlobalHandle (KERNEL.21)
597 * Get the handle associated with a pointer to the global memory block.
600 * Why is GlobalHandleToSel used here with the sel as input?
606 DWORD WINAPI GlobalHandle16(
607 WORD sel /* [in] Address of global memory block */
609 TRACE("%04x\n", sel );
610 if (!VALID_HANDLE(sel)) {
611 WARN("Invalid handle 0x%04x passed to GlobalHandle16!\n",sel);
614 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
617 /***********************************************************************
618 * GlobalHandleNoRIP (KERNEL.159)
620 DWORD WINAPI GlobalHandleNoRIP16( WORD sel )
623 for (i = globalArenaSize-1 ; i>=0 ; i--) {
624 if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == sel)
625 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
631 /***********************************************************************
632 * GlobalFlags (KERNEL.22)
634 * Get information about a global memory object.
637 * Should this return GMEM_INVALID_HANDLE instead of 0 on invalid
641 * Value specifying flags and lock count
642 * GMEM_INVALID_HANDLE: Invalid handle
644 UINT16 WINAPI GlobalFlags16(
645 HGLOBAL16 handle /* [in] Handle of global memory object */
649 TRACE("%04x\n", handle );
650 if (!VALID_HANDLE(handle)) {
651 WARN("Invalid handle 0x%04x passed to GlobalFlags16!\n",handle);
654 pArena = GET_ARENA_PTR(handle);
655 return pArena->lockCount |
656 ((pArena->flags & GA_DISCARDABLE) ? GMEM_DISCARDABLE : 0) |
657 ((pArena->base == 0) ? GMEM_DISCARDED : 0);
661 /***********************************************************************
662 * LockSegment (KERNEL.23)
664 HGLOBAL16 WINAPI LockSegment16( HGLOBAL16 handle )
666 TRACE("%04x\n", handle );
667 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
668 if (!VALID_HANDLE(handle)) {
669 WARN("Invalid handle 0x%04x passed to LockSegment16!\n",handle);
672 GET_ARENA_PTR(handle)->lockCount++;
677 /***********************************************************************
678 * UnlockSegment (KERNEL.24)
680 void WINAPI UnlockSegment16( HGLOBAL16 handle )
682 TRACE("%04x\n", handle );
683 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
684 if (!VALID_HANDLE(handle)) {
685 WARN("Invalid handle 0x%04x passed to UnlockSegment16!\n",handle);
688 GET_ARENA_PTR(handle)->lockCount--;
689 /* FIXME: this ought to return the lock count in CX (go figure...) */
693 /***********************************************************************
694 * GlobalCompact (KERNEL.25)
696 DWORD WINAPI GlobalCompact16( DWORD desired )
698 return GLOBAL_MAX_ALLOC_SIZE;
702 /***********************************************************************
703 * GlobalFreeAll (KERNEL.26)
705 void WINAPI GlobalFreeAll16( HGLOBAL16 owner )
710 pArena = pGlobalArena;
711 for (i = 0; i < globalArenaSize; i++, pArena++)
713 if ((pArena->size != 0) && (pArena->hOwner == owner))
714 GlobalFree16( pArena->handle );
719 /***********************************************************************
720 * GlobalWire (KERNEL.111)
721 * GlobalWire16 (KERNEL32.29)
723 SEGPTR WINAPI GlobalWire16( HGLOBAL16 handle )
725 return WIN16_GlobalLock16( handle );
729 /***********************************************************************
730 * GlobalUnWire (KERNEL.112)
731 * GlobalUnWire16 (KERNEL32.30)
733 BOOL16 WINAPI GlobalUnWire16( HGLOBAL16 handle )
735 return !GlobalUnlock16( handle );
739 /***********************************************************************
740 * SetSwapAreaSize (KERNEL.106)
742 LONG WINAPI SetSwapAreaSize16( WORD size )
744 FIXME("(%d) - stub!\n", size );
745 return MAKELONG( size, 0xffff );
749 /***********************************************************************
750 * GlobalLRUOldest (KERNEL.163)
752 HGLOBAL16 WINAPI GlobalLRUOldest16( HGLOBAL16 handle )
754 TRACE("%04x\n", handle );
755 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
760 /***********************************************************************
761 * GlobalLRUNewest (KERNEL.164)
763 HGLOBAL16 WINAPI GlobalLRUNewest16( HGLOBAL16 handle )
765 TRACE("%04x\n", handle );
766 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
771 /***********************************************************************
772 * GetFreeSpace (KERNEL.169)
774 DWORD WINAPI GetFreeSpace16( UINT16 wFlags )
777 GlobalMemoryStatus( &ms );
778 return ms.dwAvailVirtual;
781 /***********************************************************************
782 * GlobalDOSAlloc (KERNEL.184)
784 * Allocate memory in the first MB.
787 * Address (HW=Paragraph segment; LW=Selector)
789 DWORD WINAPI GlobalDOSAlloc16(
790 DWORD size /* [in] Number of bytes to be allocated */
793 LPVOID lpBlock = DOSMEM_AllocBlock( size, &uParagraph );
797 HMODULE16 hModule = GetModuleHandle16("KERNEL");
801 wSelector = GLOBAL_CreateBlock(GMEM_FIXED, lpBlock, size, hModule, WINE_LDT_FLAGS_DATA );
802 pArena = GET_ARENA_PTR(wSelector);
803 pArena->flags |= GA_DOSMEM;
804 return MAKELONG(wSelector,uParagraph);
810 /***********************************************************************
811 * GlobalDOSFree (KERNEL.185)
813 * Free memory allocated with GlobalDOSAlloc
819 WORD WINAPI GlobalDOSFree16(
820 WORD sel /* [in] Selector */
822 DWORD block = GetSelectorBase(sel);
824 if( block && block < 0x100000 )
826 LPVOID lpBlock = DOSMEM_MapDosToLinear( block );
827 if( DOSMEM_FreeBlock( lpBlock ) )
828 GLOBAL_FreeBlock( sel );
835 /***********************************************************************
836 * GlobalPageLock (KERNEL.191)
837 * GlobalSmartPageLock(KERNEL.230)
839 WORD WINAPI GlobalPageLock16( HGLOBAL16 handle )
841 TRACE("%04x\n", handle );
842 if (!VALID_HANDLE(handle)) {
843 WARN("Invalid handle 0x%04x passed to GlobalPageLock!\n",handle);
846 return ++(GET_ARENA_PTR(handle)->pageLockCount);
850 /***********************************************************************
851 * GlobalPageUnlock (KERNEL.192)
852 * GlobalSmartPageUnlock(KERNEL.231)
854 WORD WINAPI GlobalPageUnlock16( HGLOBAL16 handle )
856 TRACE("%04x\n", handle );
857 if (!VALID_HANDLE(handle)) {
858 WARN("Invalid handle 0x%04x passed to GlobalPageUnlock!\n",handle);
861 return --(GET_ARENA_PTR(handle)->pageLockCount);
865 /***********************************************************************
866 * GlobalFix (KERNEL.197)
867 * GlobalFix16 (KERNEL32.27)
869 WORD WINAPI GlobalFix16( HGLOBAL16 handle )
871 TRACE("%04x\n", handle );
872 if (!VALID_HANDLE(handle)) {
873 WARN("Invalid handle 0x%04x passed to GlobalFix16!\n",handle);
876 GET_ARENA_PTR(handle)->lockCount++;
878 return GlobalHandleToSel16(handle);
882 /***********************************************************************
883 * GlobalUnfix (KERNEL.198)
884 * GlobalUnfix16 (KERNEL32.28)
886 void WINAPI GlobalUnfix16( HGLOBAL16 handle )
888 TRACE("%04x\n", handle );
889 if (!VALID_HANDLE(handle)) {
890 WARN("Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle);
893 GET_ARENA_PTR(handle)->lockCount--;
897 /***********************************************************************
898 * FarSetOwner (KERNEL.403)
900 void WINAPI FarSetOwner16( HGLOBAL16 handle, HANDLE16 hOwner )
902 if (!VALID_HANDLE(handle)) {
903 WARN("Invalid handle 0x%04x passed to FarSetOwner!\n",handle);
906 GET_ARENA_PTR(handle)->hOwner = hOwner;
910 /***********************************************************************
911 * FarGetOwner (KERNEL.404)
913 HANDLE16 WINAPI FarGetOwner16( HGLOBAL16 handle )
915 if (!VALID_HANDLE(handle)) {
916 WARN("Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
919 return GET_ARENA_PTR(handle)->hOwner;
923 /************************************************************************
924 * GlobalMasterHandle (KERNEL.28)
927 * Should return selector and handle of the information structure for
928 * the global heap. selector and handle are stored in the THHOOK as
929 * pGlobalHeap and hGlobalHeap.
930 * As Wine doesn't have this structure, we return both values as zero
931 * Applications should interpret this as "No Global Heap"
933 DWORD WINAPI GlobalMasterHandle16(void)
939 /***********************************************************************
940 * GlobalHandleToSel (TOOLHELP.50)
942 WORD WINAPI GlobalHandleToSel16( HGLOBAL16 handle )
944 if (!handle) return 0;
945 if (!VALID_HANDLE(handle)) {
946 WARN("Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle);
951 WARN("Program attempted invalid selector conversion\n" );
958 /***********************************************************************
959 * GlobalFirst (TOOLHELP.51)
961 BOOL16 WINAPI GlobalFirst16( GLOBALENTRY *pGlobal, WORD wFlags )
963 if (wFlags == GLOBAL_LRU) return FALSE;
965 return GlobalNext16( pGlobal, wFlags );
969 /***********************************************************************
970 * GlobalNext (TOOLHELP.52)
972 BOOL16 WINAPI GlobalNext16( GLOBALENTRY *pGlobal, WORD wFlags)
976 if (pGlobal->dwNext >= globalArenaSize) return FALSE;
977 pArena = pGlobalArena + pGlobal->dwNext;
978 if (wFlags == GLOBAL_FREE) /* only free blocks */
981 for (i = pGlobal->dwNext; i < globalArenaSize; i++, pArena++)
982 if (pArena->size == 0) break; /* block is free */
983 if (i >= globalArenaSize) return FALSE;
987 pGlobal->dwAddress = pArena->base;
988 pGlobal->dwBlockSize = pArena->size;
989 pGlobal->hBlock = pArena->handle;
990 pGlobal->wcLock = pArena->lockCount;
991 pGlobal->wcPageLock = pArena->pageLockCount;
992 pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
993 pGlobal->wHeapPresent = FALSE;
994 pGlobal->hOwner = pArena->hOwner;
995 pGlobal->wType = GT_UNKNOWN;
1002 /***********************************************************************
1003 * GlobalInfo (TOOLHELP.53)
1005 BOOL16 WINAPI GlobalInfo16( GLOBALINFO *pInfo )
1008 GLOBALARENA *pArena;
1010 pInfo->wcItems = globalArenaSize;
1011 pInfo->wcItemsFree = 0;
1012 pInfo->wcItemsLRU = 0;
1013 for (i = 0, pArena = pGlobalArena; i < globalArenaSize; i++, pArena++)
1014 if (pArena->size == 0) pInfo->wcItemsFree++;
1019 /***********************************************************************
1020 * GlobalEntryHandle (TOOLHELP.54)
1022 BOOL16 WINAPI GlobalEntryHandle16( GLOBALENTRY *pGlobal, HGLOBAL16 hItem )
1024 GLOBALARENA *pArena = GET_ARENA_PTR(hItem);
1026 pGlobal->dwAddress = pArena->base;
1027 pGlobal->dwBlockSize = pArena->size;
1028 pGlobal->hBlock = pArena->handle;
1029 pGlobal->wcLock = pArena->lockCount;
1030 pGlobal->wcPageLock = pArena->pageLockCount;
1031 pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
1032 pGlobal->wHeapPresent = FALSE;
1033 pGlobal->hOwner = pArena->hOwner;
1034 pGlobal->wType = GT_UNKNOWN;
1041 /***********************************************************************
1042 * GlobalEntryModule (TOOLHELP.55)
1044 BOOL16 WINAPI GlobalEntryModule16( GLOBALENTRY *pGlobal, HMODULE16 hModule,
1047 FIXME("(%p, 0x%04x, 0x%04x), stub.\n", pGlobal, hModule, wSeg);
1052 /***********************************************************************
1053 * MemManInfo (TOOLHELP.72)
1055 BOOL16 WINAPI MemManInfo16( MEMMANINFO *info )
1057 MEMORYSTATUS status;
1060 * Not unsurprisingly although the documention says you
1061 * _must_ provide the size in the dwSize field, this function
1062 * (under Windows) always fills the structure and returns true.
1064 GlobalMemoryStatus( &status );
1065 info->wPageSize = getpagesize();
1066 info->dwLargestFreeBlock = status.dwAvailVirtual;
1067 info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
1068 info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
1069 info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
1070 info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
1071 info->dwFreePages = info->dwMaxPagesAvailable;
1072 info->dwTotalPages = info->dwTotalLinearSpace;
1073 info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
1074 info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
1078 /***********************************************************************
1079 * GetFreeMemInfo (KERNEL.316)
1081 DWORD WINAPI GetFreeMemInfo16(void)
1084 MemManInfo16( &info );
1085 return MAKELONG( info.dwTotalLinearSpace, info.dwMaxPagesAvailable );
1088 /***********************************************************************
1089 * A20Proc (KERNEL.165)
1091 void WINAPI A20Proc16( WORD unused )
1093 /* this is also a NOP in Windows */
1096 /***********************************************************************
1097 * LimitEMSPages (KERNEL.156)
1099 DWORD WINAPI LimitEMSPages16( DWORD unused )