2 * Global heap functions
4 * Copyright 1995 Alexandre Julliard
6 /* 0xffff sometimes seems to mean: CURRENT_DS */
15 #include "wine/winbase16.h"
16 #include "wine/exception.h"
17 #include "wine/port.h"
21 #include "selectors.h"
23 #include "stackframe.h"
25 #include "debugtools.h"
28 DEFAULT_DEBUG_CHANNEL(global);
30 /* Global arena block */
33 DWORD base; /* Base address (0 if discarded) */
34 DWORD size; /* Size in bytes (0 indicates a free block) */
35 HGLOBAL16 handle; /* Handle for this block */
36 HGLOBAL16 hOwner; /* Owner of this block */
37 BYTE lockCount; /* Count of GlobalFix() calls */
38 BYTE pageLockCount; /* Count of GlobalPageLock() calls */
39 BYTE flags; /* Allocation flags */
40 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 */
48 #define GA_DOSMEM 0x20
51 static GLOBALARENA *pGlobalArena = NULL;
52 static int globalArenaSize = 0;
54 #define GLOBAL_MAX_ALLOC_SIZE 0x00ff0000 /* Largest allocation is 16M - 64K */
56 #define VALID_HANDLE(handle) (((handle)>>__AHSHIFT)<globalArenaSize)
57 #define GET_ARENA_PTR(handle) (pGlobalArena + ((handle) >> __AHSHIFT))
59 /* filter for page-fault exceptions */
60 /* It is possible for a bogus global pointer to cause a */
61 /* page zero reference, so I include EXCEPTION_PRIV_INSTRUCTION too. */
63 static WINE_EXCEPTION_FILTER(page_fault)
65 switch (GetExceptionCode()) {
66 case (EXCEPTION_ACCESS_VIOLATION):
67 case (EXCEPTION_PRIV_INSTRUCTION):
68 return EXCEPTION_EXECUTE_HANDLER;
70 return EXCEPTION_CONTINUE_SEARCH;
74 /***********************************************************************
77 * Return the arena for a given selector, growing the arena array if needed.
79 static GLOBALARENA *GLOBAL_GetArena( WORD sel, WORD selcount )
81 if (((sel >> __AHSHIFT) + selcount) > globalArenaSize)
83 int newsize = ((sel >> __AHSHIFT) + selcount + 0xff) & ~0xff;
84 GLOBALARENA *pNewArena = realloc( pGlobalArena,
85 newsize * sizeof(GLOBALARENA) );
86 if (!pNewArena) return 0;
87 pGlobalArena = pNewArena;
88 memset( pGlobalArena + globalArenaSize, 0,
89 (newsize - globalArenaSize) * sizeof(GLOBALARENA) );
90 globalArenaSize = newsize;
92 return pGlobalArena + (sel >> __AHSHIFT);
95 void debug_handles(void)
99 for (i = globalArenaSize-1 ; i>=0 ; i--) {
100 if (pGlobalArena[i].size!=0 && (pGlobalArena[i].handle & 0x8000)){
102 DPRINTF("0x%08x, ",pGlobalArena[i].handle);
110 /***********************************************************************
113 * Create a global heap block for a fixed range of linear memory.
115 HGLOBAL16 GLOBAL_CreateBlock( WORD flags, const void *ptr, DWORD size,
116 HGLOBAL16 hOwner, unsigned char selflags )
121 /* Allocate the selector(s) */
123 sel = SELECTOR_AllocBlock( ptr, size, selflags );
125 selcount = (size + 0xffff) / 0x10000;
127 if (!(pArena = GLOBAL_GetArena( sel, selcount )))
129 SELECTOR_FreeBlock( sel );
133 /* Fill the arena block */
135 pArena->base = (DWORD)ptr;
136 pArena->size = GetSelectorLimit16(sel) + 1;
137 pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
138 pArena->hOwner = hOwner;
139 pArena->lockCount = 0;
140 pArena->pageLockCount = 0;
141 pArena->flags = flags & GA_MOVEABLE;
142 if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
143 if (flags & GMEM_DDESHARE) pArena->flags |= GA_IPCSHARE;
144 if (!(selflags & (WINE_LDT_FLAGS_CODE^WINE_LDT_FLAGS_DATA))) pArena->flags |= GA_DGROUP;
145 pArena->selCount = selcount;
146 if (selcount > 1) /* clear the next arena blocks */
147 memset( pArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
149 return pArena->handle;
153 /***********************************************************************
156 * Free a block allocated by GLOBAL_CreateBlock, without touching
157 * the associated linear memory range.
159 BOOL16 GLOBAL_FreeBlock( HGLOBAL16 handle )
164 if (!handle) return TRUE;
165 sel = GlobalHandleToSel16( handle );
166 if (!VALID_HANDLE(sel))
168 pArena = GET_ARENA_PTR(sel);
169 SELECTOR_FreeBlock( sel );
170 memset( pArena, 0, sizeof(GLOBALARENA) );
174 /***********************************************************************
177 BOOL16 GLOBAL_MoveBlock( HGLOBAL16 handle, const void *ptr, DWORD size )
182 if (!handle) return TRUE;
183 sel = GlobalHandleToSel16( handle );
184 if (!VALID_HANDLE(sel))
186 pArena = GET_ARENA_PTR(sel);
187 if (pArena->selCount != 1)
190 pArena->base = (DWORD)ptr;
192 SELECTOR_ReallocBlock( sel, ptr, size );
196 /***********************************************************************
199 * Implementation of GlobalAlloc16()
201 HGLOBAL16 GLOBAL_Alloc( UINT16 flags, DWORD size, HGLOBAL16 hOwner, unsigned char selflags )
206 TRACE("%ld flags=%04x\n", size, flags );
208 /* If size is 0, create a discarded block */
210 if (size == 0) return GLOBAL_CreateBlock( flags, NULL, 1, hOwner, selflags );
214 if (size >= GLOBAL_MAX_ALLOC_SIZE - 0x1f) return 0;
215 size = (size + 0x1f) & ~0x1f;
217 /* Allocate the linear memory */
218 ptr = HeapAlloc( GetProcessHeap(), 0, size );
219 /* FIXME: free discardable blocks and try again? */
222 /* Allocate the selector(s) */
224 handle = GLOBAL_CreateBlock( flags, ptr, size, hOwner, selflags );
227 HeapFree( GetProcessHeap(), 0, ptr );
231 if (flags & GMEM_ZEROINIT) memset( ptr, 0, size );
235 /***********************************************************************
236 * GlobalAlloc16 (KERNEL.15)
241 HGLOBAL16 WINAPI GlobalAlloc16(
242 UINT16 flags, /* [in] Object allocation attributes */
243 DWORD size /* [in] Number of bytes to allocate */
245 HANDLE16 owner = GetCurrentPDB16();
247 if (flags & GMEM_DDESHARE)
248 owner = GetExePtr(owner); /* Make it a module handle */
249 return GLOBAL_Alloc( flags, size, owner, WINE_LDT_FLAGS_DATA );
253 /***********************************************************************
254 * GlobalReAlloc16 (KERNEL.16)
259 HGLOBAL16 WINAPI GlobalReAlloc16(
260 HGLOBAL16 handle, /* [in] Handle of global memory object */
261 DWORD size, /* [in] New size of block */
262 UINT16 flags /* [in] How to reallocate object */
267 GLOBALARENA *pArena, *pNewArena;
268 WORD sel = GlobalHandleToSel16( handle );
270 TRACE("%04x %ld flags=%04x\n",
271 handle, size, flags );
272 if (!handle) return 0;
274 if (!VALID_HANDLE(handle)) {
275 WARN("Invalid handle 0x%04x!\n", handle);
278 pArena = GET_ARENA_PTR( handle );
280 /* Discard the block if requested */
282 if ((size == 0) && (flags & GMEM_MOVEABLE) && !(flags & GMEM_MODIFY))
284 if (!(pArena->flags & GA_MOVEABLE) ||
285 !(pArena->flags & GA_DISCARDABLE) ||
286 (pArena->lockCount > 0) || (pArena->pageLockCount > 0)) return 0;
287 HeapFree( GetProcessHeap(), 0, (void *)pArena->base );
290 /* Note: we rely on the fact that SELECTOR_ReallocBlock won't
291 * change the selector if we are shrinking the block.
292 * FIXME: shouldn't we keep selectors until the block is deleted?
294 SELECTOR_ReallocBlock( sel, 0, 1 );
300 if (size > GLOBAL_MAX_ALLOC_SIZE - 0x20) return 0;
301 if (size == 0) size = 0x20;
302 else size = (size + 0x1f) & ~0x1f;
304 /* Change the flags */
306 if (flags & GMEM_MODIFY)
308 /* Change the flags, leaving GA_DGROUP alone */
309 pArena->flags = (pArena->flags & GA_DGROUP) | (flags & GA_MOVEABLE);
310 if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
314 /* Reallocate the linear memory */
316 ptr = (void *)pArena->base;
317 oldsize = pArena->size;
318 TRACE("oldsize %08lx\n",oldsize);
319 if (ptr && (size == oldsize)) return handle; /* Nothing to do */
321 if (pArena->flags & GA_DOSMEM)
322 ptr = DOSMEM_ResizeBlock(ptr, size, NULL);
324 ptr = HeapReAlloc( GetProcessHeap(), 0, ptr, size );
327 SELECTOR_FreeBlock( sel );
328 memset( pArena, 0, sizeof(GLOBALARENA) );
332 /* Reallocate the selector(s) */
334 sel = SELECTOR_ReallocBlock( sel, ptr, size );
337 HeapFree( GetProcessHeap(), 0, ptr );
338 memset( pArena, 0, sizeof(GLOBALARENA) );
341 selcount = (size + 0xffff) / 0x10000;
343 if (!(pNewArena = GLOBAL_GetArena( sel, selcount )))
345 HeapFree( GetProcessHeap(), 0, ptr );
346 SELECTOR_FreeBlock( sel );
350 /* Fill the new arena block */
352 if (pNewArena != pArena) memcpy( pNewArena, pArena, sizeof(GLOBALARENA) );
353 pNewArena->base = (DWORD)ptr;
354 pNewArena->size = GetSelectorLimit16(sel) + 1;
355 pNewArena->selCount = selcount;
356 pNewArena->handle = (pNewArena->flags & GA_MOVEABLE) ? sel - 1 : sel;
358 if (selcount > 1) /* clear the next arena blocks */
359 memset( pNewArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
361 if ((oldsize < size) && (flags & GMEM_ZEROINIT))
362 memset( (char *)ptr + oldsize, 0, size - oldsize );
363 return pNewArena->handle;
367 /***********************************************************************
368 * GlobalFree16 (KERNEL.17)
373 HGLOBAL16 WINAPI GlobalFree16(
374 HGLOBAL16 handle /* [in] Handle of global memory object */
378 if (!VALID_HANDLE(handle)) {
379 WARN("Invalid handle 0x%04x passed to GlobalFree16!\n",handle);
382 ptr = (void *)GET_ARENA_PTR(handle)->base;
384 TRACE("%04x\n", handle );
385 if (!GLOBAL_FreeBlock( handle )) return handle; /* failed */
386 if (ptr) HeapFree( GetProcessHeap(), 0, ptr );
391 /***********************************************************************
392 * WIN16_GlobalLock16 (KERNEL.18)
394 * This is the GlobalLock16() function used by 16-bit code.
396 SEGPTR WINAPI WIN16_GlobalLock16( HGLOBAL16 handle )
398 WORD sel = GlobalHandleToSel16( handle );
399 TRACE("(%04x) -> %08lx\n", handle, MAKELONG( 0, sel ) );
403 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
405 if (!VALID_HANDLE(handle)) {
406 WARN("Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle);
409 else if (!GET_ARENA_PTR(handle)->base)
412 GET_ARENA_PTR(handle)->lockCount++;
415 CURRENT_STACK16->ecx = sel; /* selector must be returned in CX as well */
416 return MAKESEGPTR( sel, 0 );
420 /***********************************************************************
421 * GlobalLock16 (KERNEL.18)
423 * This is the GlobalLock16() function used by 32-bit code.
426 * Pointer to first byte of memory block
429 LPVOID WINAPI GlobalLock16(
430 HGLOBAL16 handle /* [in] Handle of global memory object */
432 if (!handle) return 0;
433 if (!VALID_HANDLE(handle))
435 GET_ARENA_PTR(handle)->lockCount++;
436 return (LPVOID)GET_ARENA_PTR(handle)->base;
440 /***********************************************************************
441 * GlobalUnlock16 (KERNEL.19)
443 * Should the return values be cast to booleans?
446 * TRUE: Object is still locked
447 * FALSE: Object is unlocked
449 BOOL16 WINAPI GlobalUnlock16(
450 HGLOBAL16 handle /* [in] Handle of global memory object */
452 GLOBALARENA *pArena = GET_ARENA_PTR(handle);
453 if (!VALID_HANDLE(handle)) {
454 WARN("Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle);
457 TRACE("%04x\n", handle );
458 if (pArena->lockCount) pArena->lockCount--;
459 return pArena->lockCount;
462 /***********************************************************************
463 * GlobalChangeLockCount (KERNEL.365)
465 * This is declared as a register function as it has to preserve
466 * *all* registers, even AX/DX !
469 void WINAPI GlobalChangeLockCount16( HGLOBAL16 handle, INT16 delta,
473 GlobalLock16( handle );
474 else if ( delta == -1 )
475 GlobalUnlock16( handle );
477 ERR("(%04X, %d): strange delta value\n", handle, delta );
480 /***********************************************************************
481 * GlobalSize16 (KERNEL.20)
483 * Size in bytes of object
486 DWORD WINAPI GlobalSize16(
487 HGLOBAL16 handle /* [in] Handle of global memory object */
489 TRACE("%04x\n", handle );
490 if (!handle) return 0;
491 if (!VALID_HANDLE(handle))
493 return GET_ARENA_PTR(handle)->size;
497 /***********************************************************************
498 * GlobalHandle16 (KERNEL.21)
500 * Why is GlobalHandleToSel used here with the sel as input?
506 DWORD WINAPI GlobalHandle16(
507 WORD sel /* [in] Address of global memory block */
509 TRACE("%04x\n", sel );
510 if (!VALID_HANDLE(sel)) {
511 WARN("Invalid handle 0x%04x passed to GlobalHandle16!\n",sel);
514 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
517 /***********************************************************************
518 * GlobalHandleNoRIP (KERNEL.159)
520 DWORD WINAPI GlobalHandleNoRIP16( WORD sel )
523 for (i = globalArenaSize-1 ; i>=0 ; i--) {
524 if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == sel)
525 return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
531 /***********************************************************************
532 * GlobalFlags16 (KERNEL.22)
534 * Should this return GMEM_INVALID_HANDLE instead of 0 on invalid
538 * Value specifying flags and lock count
539 * GMEM_INVALID_HANDLE: Invalid handle
541 UINT16 WINAPI GlobalFlags16(
542 HGLOBAL16 handle /* [in] Handle of global memory object */
546 TRACE("%04x\n", handle );
547 if (!VALID_HANDLE(handle)) {
548 WARN("Invalid handle 0x%04x passed to GlobalFlags16!\n",handle);
551 pArena = GET_ARENA_PTR(handle);
552 return pArena->lockCount |
553 ((pArena->flags & GA_DISCARDABLE) ? GMEM_DISCARDABLE : 0) |
554 ((pArena->base == 0) ? GMEM_DISCARDED : 0);
558 /***********************************************************************
559 * LockSegment16 (KERNEL.23)
561 HGLOBAL16 WINAPI LockSegment16( HGLOBAL16 handle )
563 TRACE("%04x\n", handle );
564 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
565 if (!VALID_HANDLE(handle)) {
566 WARN("Invalid handle 0x%04x passed to LockSegment16!\n",handle);
569 GET_ARENA_PTR(handle)->lockCount++;
574 /***********************************************************************
575 * UnlockSegment16 (KERNEL.24)
577 void WINAPI UnlockSegment16( HGLOBAL16 handle )
579 TRACE("%04x\n", handle );
580 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
581 if (!VALID_HANDLE(handle)) {
582 WARN("Invalid handle 0x%04x passed to UnlockSegment16!\n",handle);
585 GET_ARENA_PTR(handle)->lockCount--;
586 /* FIXME: this ought to return the lock count in CX (go figure...) */
590 /***********************************************************************
591 * GlobalCompact16 (KERNEL.25)
593 DWORD WINAPI GlobalCompact16( DWORD desired )
595 return GLOBAL_MAX_ALLOC_SIZE;
599 /***********************************************************************
600 * GlobalFreeAll (KERNEL.26)
602 void WINAPI GlobalFreeAll16( HGLOBAL16 owner )
607 pArena = pGlobalArena;
608 for (i = 0; i < globalArenaSize; i++, pArena++)
610 if ((pArena->size != 0) && (pArena->hOwner == owner))
611 GlobalFree16( pArena->handle );
616 /***********************************************************************
617 * GlobalWire16 (KERNEL.111)
619 SEGPTR WINAPI GlobalWire16( HGLOBAL16 handle )
621 return WIN16_GlobalLock16( handle );
625 /***********************************************************************
626 * GlobalUnWire16 (KERNEL.112)
628 BOOL16 WINAPI GlobalUnWire16( HGLOBAL16 handle )
630 return !GlobalUnlock16( handle );
634 /***********************************************************************
635 * SetSwapAreaSize16 (KERNEL.106)
637 LONG WINAPI SetSwapAreaSize16( WORD size )
639 FIXME("(%d) - stub!\n", size );
640 return MAKELONG( size, 0xffff );
644 /***********************************************************************
645 * GlobalLRUOldest (KERNEL.163)
647 HGLOBAL16 WINAPI GlobalLRUOldest16( HGLOBAL16 handle )
649 TRACE("%04x\n", handle );
650 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
655 /***********************************************************************
656 * GlobalLRUNewest (KERNEL.164)
658 HGLOBAL16 WINAPI GlobalLRUNewest16( HGLOBAL16 handle )
660 TRACE("%04x\n", handle );
661 if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
666 /***********************************************************************
667 * GetFreeSpace16 (KERNEL.169)
669 DWORD WINAPI GetFreeSpace16( UINT16 wFlags )
672 GlobalMemoryStatus( &ms );
673 return ms.dwAvailVirtual;
676 /***********************************************************************
677 * GlobalDOSAlloc (KERNEL.184)
679 * Address (HW=Paragraph segment; LW=Selector)
681 DWORD WINAPI GlobalDOSAlloc16(
682 DWORD size /* [in] Number of bytes to be allocated */
685 LPVOID lpBlock = DOSMEM_GetBlock( size, &uParagraph );
689 HMODULE16 hModule = GetModuleHandle16("KERNEL");
693 wSelector = GLOBAL_CreateBlock(GMEM_FIXED, lpBlock, size, hModule, WINE_LDT_FLAGS_DATA );
694 pArena = GET_ARENA_PTR(wSelector);
695 pArena->flags |= GA_DOSMEM;
696 return MAKELONG(wSelector,uParagraph);
702 /***********************************************************************
703 * GlobalDOSFree (KERNEL.185)
708 WORD WINAPI GlobalDOSFree16(
709 WORD sel /* [in] Selector */
711 DWORD block = GetSelectorBase(sel);
713 if( block && block < 0x100000 )
715 LPVOID lpBlock = DOSMEM_MapDosToLinear( block );
716 if( DOSMEM_FreeBlock( lpBlock ) )
717 GLOBAL_FreeBlock( sel );
724 /***********************************************************************
725 * GlobalPageLock (KERNEL.191)
727 WORD WINAPI GlobalPageLock16( HGLOBAL16 handle )
729 TRACE("%04x\n", handle );
730 if (!VALID_HANDLE(handle)) {
731 WARN("Invalid handle 0x%04x passed to GlobalPageLock!\n",handle);
734 return ++(GET_ARENA_PTR(handle)->pageLockCount);
738 /***********************************************************************
739 * GlobalPageUnlock (KERNEL.192)
741 WORD WINAPI GlobalPageUnlock16( HGLOBAL16 handle )
743 TRACE("%04x\n", handle );
744 if (!VALID_HANDLE(handle)) {
745 WARN("Invalid handle 0x%04x passed to GlobalPageUnlock!\n",handle);
748 return --(GET_ARENA_PTR(handle)->pageLockCount);
752 /***********************************************************************
753 * GlobalFix16 (KERNEL.197)
755 WORD WINAPI GlobalFix16( HGLOBAL16 handle )
757 TRACE("%04x\n", handle );
758 if (!VALID_HANDLE(handle)) {
759 WARN("Invalid handle 0x%04x passed to GlobalFix16!\n",handle);
762 GET_ARENA_PTR(handle)->lockCount++;
764 return GlobalHandleToSel16(handle);
768 /***********************************************************************
769 * GlobalUnfix16 (KERNEL.198)
771 void WINAPI GlobalUnfix16( HGLOBAL16 handle )
773 TRACE("%04x\n", handle );
774 if (!VALID_HANDLE(handle)) {
775 WARN("Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle);
778 GET_ARENA_PTR(handle)->lockCount--;
782 /***********************************************************************
783 * FarSetOwner (KERNEL.403)
785 void WINAPI FarSetOwner16( HGLOBAL16 handle, HANDLE16 hOwner )
787 if (!VALID_HANDLE(handle)) {
788 WARN("Invalid handle 0x%04x passed to FarSetOwner!\n",handle);
791 GET_ARENA_PTR(handle)->hOwner = hOwner;
795 /***********************************************************************
796 * FarGetOwner (KERNEL.404)
798 HANDLE16 WINAPI FarGetOwner16( HGLOBAL16 handle )
800 if (!VALID_HANDLE(handle)) {
801 WARN("Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
804 return GET_ARENA_PTR(handle)->hOwner;
808 /***********************************************************************
809 * GlobalHandleToSel (TOOLHELP.50)
811 WORD WINAPI GlobalHandleToSel16( HGLOBAL16 handle )
813 if (!handle) return 0;
814 if (!VALID_HANDLE(handle)) {
815 WARN("Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle);
820 WARN("Program attempted invalid selector conversion\n" );
827 /***********************************************************************
828 * GlobalFirst (TOOLHELP.51)
830 BOOL16 WINAPI GlobalFirst16( GLOBALENTRY *pGlobal, WORD wFlags )
832 if (wFlags == GLOBAL_LRU) return FALSE;
834 return GlobalNext16( pGlobal, wFlags );
838 /***********************************************************************
839 * GlobalNext (TOOLHELP.52)
841 BOOL16 WINAPI GlobalNext16( GLOBALENTRY *pGlobal, WORD wFlags)
845 if (pGlobal->dwNext >= globalArenaSize) return FALSE;
846 pArena = pGlobalArena + pGlobal->dwNext;
847 if (wFlags == GLOBAL_FREE) /* only free blocks */
850 for (i = pGlobal->dwNext; i < globalArenaSize; i++, pArena++)
851 if (pArena->size == 0) break; /* block is free */
852 if (i >= globalArenaSize) return FALSE;
856 pGlobal->dwAddress = pArena->base;
857 pGlobal->dwBlockSize = pArena->size;
858 pGlobal->hBlock = pArena->handle;
859 pGlobal->wcLock = pArena->lockCount;
860 pGlobal->wcPageLock = pArena->pageLockCount;
861 pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
862 pGlobal->wHeapPresent = FALSE;
863 pGlobal->hOwner = pArena->hOwner;
864 pGlobal->wType = GT_UNKNOWN;
871 /***********************************************************************
872 * GlobalInfo (TOOLHELP.53)
874 BOOL16 WINAPI GlobalInfo16( GLOBALINFO *pInfo )
879 pInfo->wcItems = globalArenaSize;
880 pInfo->wcItemsFree = 0;
881 pInfo->wcItemsLRU = 0;
882 for (i = 0, pArena = pGlobalArena; i < globalArenaSize; i++, pArena++)
883 if (pArena->size == 0) pInfo->wcItemsFree++;
888 /***********************************************************************
889 * GlobalEntryHandle (TOOLHELP.54)
891 BOOL16 WINAPI GlobalEntryHandle16( GLOBALENTRY *pGlobal, HGLOBAL16 hItem )
893 GLOBALARENA *pArena = GET_ARENA_PTR(hItem);
895 pGlobal->dwAddress = pArena->base;
896 pGlobal->dwBlockSize = pArena->size;
897 pGlobal->hBlock = pArena->handle;
898 pGlobal->wcLock = pArena->lockCount;
899 pGlobal->wcPageLock = pArena->pageLockCount;
900 pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
901 pGlobal->wHeapPresent = FALSE;
902 pGlobal->hOwner = pArena->hOwner;
903 pGlobal->wType = GT_UNKNOWN;
910 /***********************************************************************
911 * GlobalEntryModule (TOOLHELP.55)
913 BOOL16 WINAPI GlobalEntryModule16( GLOBALENTRY *pGlobal, HMODULE16 hModule,
916 FIXME("(%p, 0x%04x, 0x%04x), stub.\n", pGlobal, hModule, wSeg);
921 /***********************************************************************
922 * MemManInfo (TOOLHELP.72)
924 BOOL16 WINAPI MemManInfo16( MEMMANINFO *info )
929 * Not unsurprisingly although the documention says you
930 * _must_ provide the size in the dwSize field, this function
931 * (under Windows) always fills the structure and returns true.
933 GlobalMemoryStatus( &status );
934 info->wPageSize = getpagesize();
935 info->dwLargestFreeBlock = status.dwAvailVirtual;
936 info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
937 info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
938 info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
939 info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
940 info->dwFreePages = info->dwMaxPagesAvailable;
941 info->dwTotalPages = info->dwTotalLinearSpace;
942 info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
943 info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
947 /***********************************************************************
948 * GetFreeMemInfo (KERNEL.316)
950 DWORD WINAPI GetFreeMemInfo16(void)
953 MemManInfo16( &info );
954 return MAKELONG( info.dwTotalLinearSpace, info.dwMaxPagesAvailable );
958 * Win32 Global heap functions (GlobalXXX).
959 * These functions included in Win32 for compatibility with 16 bit Windows
960 * Especially the moveable blocks and handles are oldish.
961 * But the ability to directly allocate memory with GPTR and LPTR is widely
964 * The handle stuff looks horrible, but it's implemented almost like Win95
969 #define MAGIC_GLOBAL_USED 0x5342
970 #define GLOBAL_LOCK_MAX 0xFF
971 #define HANDLE_TO_INTERN(h) ((PGLOBAL32_INTERN)(((char *)(h))-2))
972 #define INTERN_TO_HANDLE(i) ((HGLOBAL) &((i)->Pointer))
973 #define POINTER_TO_HANDLE(p) (*(((HGLOBAL *)(p))-1))
974 #define ISHANDLE(h) (((DWORD)(h)&2)!=0)
975 #define ISPOINTER(h) (((DWORD)(h)&2)==0)
977 typedef struct __GLOBAL32_INTERN
980 LPVOID Pointer WINE_PACKED;
983 } GLOBAL32_INTERN, *PGLOBAL32_INTERN;
985 /***********************************************************************
988 * Returns the appropriate heap to be used. If the object was created
989 * With GMEM_DDESHARE we allocated it on the system heap.
991 static HANDLE GLOBAL_GetHeap( HGLOBAL hmem )
995 TRACE("() hmem=%x\n", hmem);
997 /* Get the appropriate heap to be used for this object */
999 heap = GetProcessHeap();
1002 PGLOBAL32_INTERN pintern;
1003 pintern=HANDLE_TO_INTERN(hmem);
1005 /* If it was DDESHARE it was created on the shared system heap */
1006 pintern=HANDLE_TO_INTERN(hmem);
1007 heap = ( pintern->Flags & (GMEM_DDESHARE >> 8) )
1008 ? SystemHeap : GetProcessHeap();
1014 /***********************************************************************
1015 * GlobalAlloc (KERNEL32.315)
1020 HGLOBAL WINAPI GlobalAlloc(
1021 UINT flags, /* [in] Object allocation attributes */
1022 DWORD size /* [in] Number of bytes to allocate */
1024 PGLOBAL32_INTERN pintern;
1028 if(flags&GMEM_ZEROINIT)
1029 hpflags=HEAP_ZERO_MEMORY;
1033 TRACE("() flags=%04x\n", flags );
1035 if((flags & GMEM_MOVEABLE)==0) /* POINTER */
1037 palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
1038 return (HGLOBAL) palloc;
1044 /* If DDESHARE is set, create on the shared system heap */
1045 heap = (flags & GMEM_DDESHARE) ? SystemHeap : GetProcessHeap();
1047 /* HeapLock(heap); */
1049 pintern=HeapAlloc(heap, 0, sizeof(GLOBAL32_INTERN));
1050 if (!pintern) return 0;
1053 size = (size + 0x1f) & ~0x1f;
1054 if (!(palloc=HeapAlloc(heap, hpflags, size+sizeof(HGLOBAL)))) {
1055 HeapFree(heap, 0, pintern);
1058 *(HGLOBAL *)palloc=INTERN_TO_HANDLE(pintern);
1059 pintern->Pointer=(char *) palloc+sizeof(HGLOBAL);
1062 pintern->Pointer=NULL;
1063 pintern->Magic=MAGIC_GLOBAL_USED;
1064 pintern->Flags=flags>>8;
1065 pintern->LockCount=0;
1067 /* HeapUnlock(heap); */
1069 return INTERN_TO_HANDLE(pintern);
1074 /***********************************************************************
1075 * GlobalLock (KERNEL32.326)
1077 * Pointer to first byte of block
1080 LPVOID WINAPI GlobalLock(
1081 HGLOBAL hmem /* [in] Handle of global memory object */
1083 PGLOBAL32_INTERN pintern;
1087 return (LPVOID) hmem;
1089 /* HeapLock(GetProcessHeap()); */
1091 pintern=HANDLE_TO_INTERN(hmem);
1092 if(pintern->Magic==MAGIC_GLOBAL_USED)
1094 if(pintern->LockCount<GLOBAL_LOCK_MAX)
1095 pintern->LockCount++;
1096 palloc=pintern->Pointer;
1100 WARN("invalid handle\n");
1101 palloc=(LPVOID) NULL;
1102 SetLastError(ERROR_INVALID_HANDLE);
1104 /* HeapUnlock(GetProcessHeap()); */;
1109 /***********************************************************************
1110 * GlobalUnlock (KERNEL32.332)
1112 * TRUE: Object is still locked
1113 * FALSE: Object is unlocked
1115 BOOL WINAPI GlobalUnlock(
1116 HGLOBAL hmem /* [in] Handle of global memory object */
1118 PGLOBAL32_INTERN pintern;
1124 /* HeapLock(GetProcessHeap()); */
1125 pintern=HANDLE_TO_INTERN(hmem);
1127 if(pintern->Magic==MAGIC_GLOBAL_USED)
1129 if((pintern->LockCount<GLOBAL_LOCK_MAX)&&(pintern->LockCount>0))
1130 pintern->LockCount--;
1132 locked = (pintern->LockCount != 0);
1133 if (!locked) SetLastError(NO_ERROR);
1137 WARN("invalid handle\n");
1138 SetLastError(ERROR_INVALID_HANDLE);
1141 /* HeapUnlock(GetProcessHeap()); */
1146 /***********************************************************************
1147 * GlobalHandle (KERNEL32.325)
1148 * Returns the handle associated with the specified pointer.
1154 HGLOBAL WINAPI GlobalHandle(
1155 LPCVOID pmem /* [in] Pointer to global memory block */
1159 PGLOBAL32_INTERN maybe_intern;
1164 SetLastError( ERROR_INVALID_PARAMETER );
1172 /* note that if pmem is a pointer to a a block allocated by */
1173 /* GlobalAlloc with GMEM_MOVEABLE then magic test in HeapValidate */
1175 if (ISPOINTER(pmem)) {
1176 heap = GLOBAL_GetHeap( (HGLOBAL)pmem );
1177 if (HeapValidate( heap, 0, pmem )) {
1178 handle = (HGLOBAL)pmem; /* valid fixed block */
1181 handle = POINTER_TO_HANDLE(pmem);
1183 handle = (HGLOBAL)pmem;
1185 /* Now test handle either passed in or retrieved from pointer */
1186 heap = GLOBAL_GetHeap( handle );
1187 maybe_intern = HANDLE_TO_INTERN( handle );
1188 if (maybe_intern->Magic == MAGIC_GLOBAL_USED) {
1189 test = maybe_intern->Pointer;
1190 if (HeapValidate( heap, 0, ((HGLOBAL *)test)-1 ) && /* obj(-handle) valid arena? */
1191 HeapValidate( heap, 0, maybe_intern )) /* intern valid arena? */
1192 break; /* valid moveable block */
1195 SetLastError( ERROR_INVALID_HANDLE );
1197 __EXCEPT(page_fault)
1199 SetLastError( ERROR_INVALID_HANDLE );
1208 /***********************************************************************
1209 * GlobalReAlloc (KERNEL32.328)
1214 HGLOBAL WINAPI GlobalReAlloc(
1215 HGLOBAL hmem, /* [in] Handle of global memory object */
1216 DWORD size, /* [in] New size of block */
1217 UINT flags /* [in] How to reallocate object */
1221 PGLOBAL32_INTERN pintern;
1222 HANDLE heap = GLOBAL_GetHeap( hmem );
1223 DWORD heap_flags = (flags & GMEM_ZEROINIT) ? HEAP_ZERO_MEMORY : 0;
1226 /* HeapLock(heap); */
1227 if(flags & GMEM_MODIFY) /* modify flags */
1229 if( ISPOINTER(hmem) && (flags & GMEM_MOVEABLE))
1231 /* make a fixed block moveable
1232 * actually only NT is able to do this. But it's soo simple
1236 ERR("GlobalReAlloc32 with null handle!\n");
1237 SetLastError( ERROR_NOACCESS );
1240 size=HeapSize(heap, 0, (LPVOID) hmem);
1241 hnew=GlobalAlloc( flags, size);
1242 palloc=GlobalLock(hnew);
1243 memcpy(palloc, (LPVOID) hmem, size);
1247 else if( ISPOINTER(hmem) &&(flags & GMEM_DISCARDABLE))
1249 /* change the flags to make our block "discardable" */
1250 pintern=HANDLE_TO_INTERN(hmem);
1251 pintern->Flags = pintern->Flags | (GMEM_DISCARDABLE >> 8);
1256 SetLastError(ERROR_INVALID_PARAMETER);
1264 /* reallocate fixed memory */
1265 hnew=(HGLOBAL)HeapReAlloc(heap, heap_flags, (LPVOID) hmem, size);
1269 /* reallocate a moveable block */
1270 pintern=HANDLE_TO_INTERN(hmem);
1273 /* Apparently Windows doesn't care whether the handle is locked at this point */
1274 /* See also the same comment in GlobalFree() */
1275 if(pintern->LockCount>1) {
1276 ERR("handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
1277 SetLastError(ERROR_INVALID_HANDLE);
1283 if(pintern->Pointer)
1285 if((palloc = HeapReAlloc(heap, heap_flags,
1286 (char *) pintern->Pointer-sizeof(HGLOBAL),
1287 size+sizeof(HGLOBAL))) == NULL)
1288 return 0; /* Block still valid */
1289 pintern->Pointer=(char *) palloc+sizeof(HGLOBAL);
1293 if((palloc=HeapAlloc(heap, heap_flags, size+sizeof(HGLOBAL)))
1296 *(HGLOBAL *)palloc=hmem;
1297 pintern->Pointer=(char *) palloc+sizeof(HGLOBAL);
1302 if(pintern->Pointer)
1304 HeapFree(heap, 0, (char *) pintern->Pointer-sizeof(HGLOBAL));
1305 pintern->Pointer=NULL;
1310 /* HeapUnlock(heap); */
1315 /***********************************************************************
1316 * GlobalFree (KERNEL32.322)
1321 HGLOBAL WINAPI GlobalFree(
1322 HGLOBAL hmem /* [in] Handle of global memory object */
1324 PGLOBAL32_INTERN pintern;
1325 HGLOBAL hreturned = 0;
1326 HANDLE heap = GLOBAL_GetHeap( hmem );
1328 if(ISPOINTER(hmem)) /* POINTER */
1330 if(!HeapFree(heap, 0, (LPVOID) hmem)) hmem = 0;
1334 /* HeapLock(heap); */
1335 pintern=HANDLE_TO_INTERN(hmem);
1337 if(pintern->Magic==MAGIC_GLOBAL_USED)
1340 /* WIN98 does not make this test. That is you can free a */
1341 /* block you have not unlocked. Go figure!! */
1342 /* if(pintern->LockCount!=0) */
1343 /* SetLastError(ERROR_INVALID_HANDLE); */
1345 if(pintern->Pointer)
1346 if(!HeapFree(heap, 0,
1347 (char *)(pintern->Pointer)-sizeof(HGLOBAL)))
1349 if(!HeapFree(heap, 0, pintern))
1352 /* HeapUnlock(heap); */
1358 /***********************************************************************
1359 * GlobalSize (KERNEL32.329)
1361 * Size in bytes of the global memory object
1364 DWORD WINAPI GlobalSize(
1365 HGLOBAL hmem /* [in] Handle of global memory object */
1368 PGLOBAL32_INTERN pintern;
1369 HANDLE heap = GLOBAL_GetHeap( hmem );
1373 retval=HeapSize(heap, 0, (LPVOID) hmem);
1377 /* HeapLock(heap); */
1378 pintern=HANDLE_TO_INTERN(hmem);
1380 if(pintern->Magic==MAGIC_GLOBAL_USED)
1382 if (!pintern->Pointer) /* handle case of GlobalAlloc( ??,0) */
1384 retval=HeapSize(heap, 0,
1385 (char *)(pintern->Pointer)-sizeof(HGLOBAL))-4;
1386 if (retval == 0xffffffff-4) retval = 0;
1390 WARN("invalid handle\n");
1393 /* HeapUnlock(heap); */
1395 /* HeapSize returns 0xffffffff on failure */
1396 if (retval == 0xffffffff) retval = 0;
1401 /***********************************************************************
1402 * GlobalWire (KERNEL32.333)
1404 LPVOID WINAPI GlobalWire(HGLOBAL hmem)
1406 return GlobalLock( hmem );
1410 /***********************************************************************
1411 * GlobalUnWire (KERNEL32.330)
1413 BOOL WINAPI GlobalUnWire(HGLOBAL hmem)
1415 return GlobalUnlock( hmem);
1419 /***********************************************************************
1420 * GlobalFix (KERNEL32.320)
1422 VOID WINAPI GlobalFix(HGLOBAL hmem)
1428 /***********************************************************************
1429 * GlobalUnfix (KERNEL32.331)
1431 VOID WINAPI GlobalUnfix(HGLOBAL hmem)
1433 GlobalUnlock( hmem);
1437 /***********************************************************************
1438 * GlobalFlags (KERNEL32.321)
1439 * Returns information about the specified global memory object
1442 * Should this return GMEM_INVALID_HANDLE on invalid handle?
1445 * Value specifying allocation flags and lock count
1446 * GMEM_INVALID_HANDLE: Failure
1448 UINT WINAPI GlobalFlags(
1449 HGLOBAL hmem /* [in] Handle to global memory object */
1452 PGLOBAL32_INTERN pintern;
1460 /* HeapLock(GetProcessHeap()); */
1461 pintern=HANDLE_TO_INTERN(hmem);
1462 if(pintern->Magic==MAGIC_GLOBAL_USED)
1464 retval=pintern->LockCount + (pintern->Flags<<8);
1465 if(pintern->Pointer==0)
1466 retval|= GMEM_DISCARDED;
1470 WARN("Invalid handle: %04x", hmem);
1473 /* HeapUnlock(GetProcessHeap()); */
1479 /***********************************************************************
1480 * GlobalCompact (KERNEL32.316)
1482 DWORD WINAPI GlobalCompact( DWORD minfree )
1484 return 0; /* GlobalCompact does nothing in Win32 */
1488 /***********************************************************************
1489 * GlobalMemoryStatus (KERNEL32.327)
1493 VOID WINAPI GlobalMemoryStatus(
1494 LPMEMORYSTATUS lpmem
1496 static MEMORYSTATUS cached_memstatus;
1497 static int cache_lastchecked = 0;
1503 if (time(NULL)==cache_lastchecked) {
1504 memcpy(lpmem,&cached_memstatus,sizeof(MEMORYSTATUS));
1507 cache_lastchecked = time(NULL);
1510 f = fopen( "/proc/meminfo", "r" );
1514 int total, used, free, shared, buffers, cached;
1516 lpmem->dwLength = sizeof(MEMORYSTATUS);
1517 lpmem->dwTotalPhys = lpmem->dwAvailPhys = 0;
1518 lpmem->dwTotalPageFile = lpmem->dwAvailPageFile = 0;
1519 while (fgets( buffer, sizeof(buffer), f ))
1521 /* old style /proc/meminfo ... */
1522 if (sscanf( buffer, "Mem: %d %d %d %d %d %d", &total, &used, &free, &shared, &buffers, &cached ))
1524 lpmem->dwTotalPhys += total;
1525 lpmem->dwAvailPhys += free + buffers + cached;
1527 if (sscanf( buffer, "Swap: %d %d %d", &total, &used, &free ))
1529 lpmem->dwTotalPageFile += total;
1530 lpmem->dwAvailPageFile += free;
1533 /* new style /proc/meminfo ... */
1534 if (sscanf(buffer, "MemTotal: %d", &total))
1535 lpmem->dwTotalPhys = total*1024;
1536 if (sscanf(buffer, "MemFree: %d", &free))
1537 lpmem->dwAvailPhys = free*1024;
1538 if (sscanf(buffer, "SwapTotal: %d", &total))
1539 lpmem->dwTotalPageFile = total*1024;
1540 if (sscanf(buffer, "SwapFree: %d", &free))
1541 lpmem->dwAvailPageFile = free*1024;
1542 if (sscanf(buffer, "Buffers: %d", &buffers))
1543 lpmem->dwAvailPhys += buffers*1024;
1544 if (sscanf(buffer, "Cached: %d", &cached))
1545 lpmem->dwAvailPhys += cached*1024;
1549 if (lpmem->dwTotalPhys)
1551 DWORD TotalPhysical = lpmem->dwTotalPhys+lpmem->dwTotalPageFile;
1552 DWORD AvailPhysical = lpmem->dwAvailPhys+lpmem->dwAvailPageFile;
1553 lpmem->dwMemoryLoad = (TotalPhysical-AvailPhysical)
1554 / (TotalPhysical / 100);
1559 /* FIXME: should do something for other systems */
1560 lpmem->dwMemoryLoad = 0;
1561 lpmem->dwTotalPhys = 16*1024*1024;
1562 lpmem->dwAvailPhys = 16*1024*1024;
1563 lpmem->dwTotalPageFile = 16*1024*1024;
1564 lpmem->dwAvailPageFile = 16*1024*1024;
1567 lpmem->dwTotalVirtual = si.lpMaximumApplicationAddress-si.lpMinimumApplicationAddress;
1568 /* FIXME: we should track down all the already allocated VM pages and substract them, for now arbitrarily remove 64KB so that it matches NT */
1569 lpmem->dwAvailVirtual = lpmem->dwTotalVirtual-64*1024;
1570 memcpy(&cached_memstatus,lpmem,sizeof(MEMORYSTATUS));
1573 /***********************************************************************
1574 * A20Proc16 (KERNEL.165)
1576 void WINAPI A20Proc16( WORD unused )
1578 /* this is also a NOP in Windows */
1581 /***********************************************************************
1582 * LimitEMSPages16 (KERNEL.156)
1584 DWORD WINAPI LimitEMSPages16( DWORD unused )