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"
20 #include "selectors.h"
22 #include "stackframe.h"
24 #include "debugtools.h"
27 DEFAULT_DEBUG_CHANNEL(global
);
29 /* Global arena block */
32 DWORD base
; /* Base address (0 if discarded) */
33 DWORD size
; /* Size in bytes (0 indicates a free block) */
34 HGLOBAL16 handle
; /* Handle for this block */
35 HGLOBAL16 hOwner
; /* Owner of this block */
36 BYTE lockCount
; /* Count of GlobalFix() calls */
37 BYTE pageLockCount
; /* Count of GlobalPageLock() calls */
38 BYTE flags
; /* Allocation flags */
39 BYTE selCount
; /* Number of selectors allocated for this block */
42 /* Flags definitions */
43 #define GA_MOVEABLE 0x02 /* same as GMEM_MOVEABLE */
44 #define GA_DGROUP 0x04
45 #define GA_DISCARDABLE 0x08
46 #define GA_IPCSHARE 0x10 /* same as GMEM_DDESHARE */
47 #define GA_DOSMEM 0x20
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 /* filter for page-fault exceptions */
59 /* It is possible for a bogus global pointer to cause a */
60 /* page zero reference, so I include EXCEPTION_PRIV_INSTRUCTION too. */
62 static WINE_EXCEPTION_FILTER(page_fault
)
64 switch (GetExceptionCode()) {
65 case (EXCEPTION_ACCESS_VIOLATION
):
66 case (EXCEPTION_PRIV_INSTRUCTION
):
67 return EXCEPTION_EXECUTE_HANDLER
;
69 return EXCEPTION_CONTINUE_SEARCH
;
73 /***********************************************************************
76 * Return the arena for a given selector, growing the arena array if needed.
78 static GLOBALARENA
*GLOBAL_GetArena( WORD sel
, WORD selcount
)
80 if (((sel
>> __AHSHIFT
) + selcount
) > globalArenaSize
)
82 int newsize
= ((sel
>> __AHSHIFT
) + selcount
+ 0xff) & ~0xff;
83 GLOBALARENA
*pNewArena
= realloc( pGlobalArena
,
84 newsize
* sizeof(GLOBALARENA
) );
85 if (!pNewArena
) return 0;
86 pGlobalArena
= pNewArena
;
87 memset( pGlobalArena
+ globalArenaSize
, 0,
88 (newsize
- globalArenaSize
) * sizeof(GLOBALARENA
) );
89 globalArenaSize
= newsize
;
91 return pGlobalArena
+ (sel
>> __AHSHIFT
);
94 void debug_handles(void)
98 for (i
= globalArenaSize
-1 ; i
>=0 ; i
--) {
99 if (pGlobalArena
[i
].size
!=0 && (pGlobalArena
[i
].handle
& 0x8000)){
101 DPRINTF("0x%08x, ",pGlobalArena
[i
].handle
);
109 /***********************************************************************
112 * Create a global heap block for a fixed range of linear memory.
114 HGLOBAL16
GLOBAL_CreateBlock( WORD flags
, const void *ptr
, DWORD size
,
115 HGLOBAL16 hOwner
, unsigned char selflags
)
120 /* Allocate the selector(s) */
122 sel
= SELECTOR_AllocBlock( ptr
, size
, selflags
);
124 selcount
= (size
+ 0xffff) / 0x10000;
126 if (!(pArena
= GLOBAL_GetArena( sel
, selcount
)))
128 SELECTOR_FreeBlock( sel
);
132 /* Fill the arena block */
134 pArena
->base
= (DWORD
)ptr
;
135 pArena
->size
= GetSelectorLimit16(sel
) + 1;
136 pArena
->handle
= (flags
& GMEM_MOVEABLE
) ? sel
- 1 : sel
;
137 pArena
->hOwner
= hOwner
;
138 pArena
->lockCount
= 0;
139 pArena
->pageLockCount
= 0;
140 pArena
->flags
= flags
& GA_MOVEABLE
;
141 if (flags
& GMEM_DISCARDABLE
) pArena
->flags
|= GA_DISCARDABLE
;
142 if (flags
& GMEM_DDESHARE
) pArena
->flags
|= GA_IPCSHARE
;
143 if (!(selflags
& (WINE_LDT_FLAGS_CODE
^WINE_LDT_FLAGS_DATA
))) pArena
->flags
|= GA_DGROUP
;
144 pArena
->selCount
= selcount
;
145 if (selcount
> 1) /* clear the next arena blocks */
146 memset( pArena
+ 1, 0, (selcount
- 1) * sizeof(GLOBALARENA
) );
148 return pArena
->handle
;
152 /***********************************************************************
155 * Free a block allocated by GLOBAL_CreateBlock, without touching
156 * the associated linear memory range.
158 BOOL16
GLOBAL_FreeBlock( HGLOBAL16 handle
)
163 if (!handle
) return TRUE
;
164 sel
= GlobalHandleToSel16( handle
);
165 if (!VALID_HANDLE(sel
))
167 pArena
= GET_ARENA_PTR(sel
);
168 SELECTOR_FreeBlock( sel
);
169 memset( pArena
, 0, sizeof(GLOBALARENA
) );
173 /***********************************************************************
176 BOOL16
GLOBAL_MoveBlock( HGLOBAL16 handle
, const void *ptr
, DWORD size
)
181 if (!handle
) return TRUE
;
182 sel
= GlobalHandleToSel16( handle
);
183 if (!VALID_HANDLE(sel
))
185 pArena
= GET_ARENA_PTR(sel
);
186 if (pArena
->selCount
!= 1)
189 pArena
->base
= (DWORD
)ptr
;
191 SELECTOR_ReallocBlock( sel
, ptr
, size
);
195 /***********************************************************************
198 * Implementation of GlobalAlloc16()
200 HGLOBAL16
GLOBAL_Alloc( UINT16 flags
, DWORD size
, HGLOBAL16 hOwner
, unsigned char selflags
)
205 TRACE("%ld flags=%04x\n", size
, flags
);
207 /* If size is 0, create a discarded block */
209 if (size
== 0) return GLOBAL_CreateBlock( flags
, NULL
, 1, hOwner
, selflags
);
213 if (size
>= GLOBAL_MAX_ALLOC_SIZE
- 0x1f) return 0;
214 size
= (size
+ 0x1f) & ~0x1f;
216 /* Allocate the linear memory */
217 ptr
= HeapAlloc( GetProcessHeap(), 0, size
);
218 /* FIXME: free discardable blocks and try again? */
221 /* Allocate the selector(s) */
223 handle
= GLOBAL_CreateBlock( flags
, ptr
, size
, hOwner
, selflags
);
226 HeapFree( GetProcessHeap(), 0, ptr
);
230 if (flags
& GMEM_ZEROINIT
) memset( ptr
, 0, size
);
234 /***********************************************************************
235 * GlobalAlloc16 (KERNEL.15)
240 HGLOBAL16 WINAPI
GlobalAlloc16(
241 UINT16 flags
, /* [in] Object allocation attributes */
242 DWORD size
/* [in] Number of bytes to allocate */
244 HANDLE16 owner
= GetCurrentPDB16();
246 if (flags
& GMEM_DDESHARE
)
247 owner
= GetExePtr(owner
); /* Make it a module handle */
248 return GLOBAL_Alloc( flags
, size
, owner
, WINE_LDT_FLAGS_DATA
);
252 /***********************************************************************
253 * GlobalReAlloc16 (KERNEL.16)
258 HGLOBAL16 WINAPI
GlobalReAlloc16(
259 HGLOBAL16 handle
, /* [in] Handle of global memory object */
260 DWORD size
, /* [in] New size of block */
261 UINT16 flags
/* [in] How to reallocate object */
266 GLOBALARENA
*pArena
, *pNewArena
;
267 WORD sel
= GlobalHandleToSel16( handle
);
269 TRACE("%04x %ld flags=%04x\n",
270 handle
, size
, flags
);
271 if (!handle
) return 0;
273 if (!VALID_HANDLE(handle
)) {
274 WARN("Invalid handle 0x%04x!\n", handle
);
277 pArena
= GET_ARENA_PTR( handle
);
279 /* Discard the block if requested */
281 if ((size
== 0) && (flags
& GMEM_MOVEABLE
) && !(flags
& GMEM_MODIFY
))
283 if (!(pArena
->flags
& GA_MOVEABLE
) ||
284 !(pArena
->flags
& GA_DISCARDABLE
) ||
285 (pArena
->lockCount
> 0) || (pArena
->pageLockCount
> 0)) return 0;
286 HeapFree( GetProcessHeap(), 0, (void *)pArena
->base
);
289 /* Note: we rely on the fact that SELECTOR_ReallocBlock won't
290 * change the selector if we are shrinking the block.
291 * FIXME: shouldn't we keep selectors until the block is deleted?
293 SELECTOR_ReallocBlock( sel
, 0, 1 );
299 if (size
> GLOBAL_MAX_ALLOC_SIZE
- 0x20) return 0;
300 if (size
== 0) size
= 0x20;
301 else size
= (size
+ 0x1f) & ~0x1f;
303 /* Change the flags */
305 if (flags
& GMEM_MODIFY
)
307 /* Change the flags, leaving GA_DGROUP alone */
308 pArena
->flags
= (pArena
->flags
& GA_DGROUP
) | (flags
& GA_MOVEABLE
);
309 if (flags
& GMEM_DISCARDABLE
) pArena
->flags
|= GA_DISCARDABLE
;
313 /* Reallocate the linear memory */
315 ptr
= (void *)pArena
->base
;
316 oldsize
= pArena
->size
;
317 TRACE("oldsize %08lx\n",oldsize
);
318 if (ptr
&& (size
== oldsize
)) return handle
; /* Nothing to do */
320 if (pArena
->flags
& GA_DOSMEM
)
321 ptr
= DOSMEM_ResizeBlock(ptr
, size
, NULL
);
323 ptr
= HeapReAlloc( GetProcessHeap(), 0, ptr
, size
);
326 SELECTOR_FreeBlock( sel
);
327 memset( pArena
, 0, sizeof(GLOBALARENA
) );
331 /* Reallocate the selector(s) */
333 sel
= SELECTOR_ReallocBlock( sel
, ptr
, size
);
336 HeapFree( GetProcessHeap(), 0, ptr
);
337 memset( pArena
, 0, sizeof(GLOBALARENA
) );
340 selcount
= (size
+ 0xffff) / 0x10000;
342 if (!(pNewArena
= GLOBAL_GetArena( sel
, selcount
)))
344 HeapFree( GetProcessHeap(), 0, ptr
);
345 SELECTOR_FreeBlock( sel
);
349 /* Fill the new arena block */
351 if (pNewArena
!= pArena
) memcpy( pNewArena
, pArena
, sizeof(GLOBALARENA
) );
352 pNewArena
->base
= (DWORD
)ptr
;
353 pNewArena
->size
= GetSelectorLimit16(sel
) + 1;
354 pNewArena
->selCount
= selcount
;
355 pNewArena
->handle
= (pNewArena
->flags
& GA_MOVEABLE
) ? sel
- 1 : sel
;
357 if (selcount
> 1) /* clear the next arena blocks */
358 memset( pNewArena
+ 1, 0, (selcount
- 1) * sizeof(GLOBALARENA
) );
360 if ((oldsize
< size
) && (flags
& GMEM_ZEROINIT
))
361 memset( (char *)ptr
+ oldsize
, 0, size
- oldsize
);
362 return pNewArena
->handle
;
366 /***********************************************************************
367 * GlobalFree16 (KERNEL.17)
372 HGLOBAL16 WINAPI
GlobalFree16(
373 HGLOBAL16 handle
/* [in] Handle of global memory object */
377 if (!VALID_HANDLE(handle
)) {
378 WARN("Invalid handle 0x%04x passed to GlobalFree16!\n",handle
);
381 ptr
= (void *)GET_ARENA_PTR(handle
)->base
;
383 TRACE("%04x\n", handle
);
384 if (!GLOBAL_FreeBlock( handle
)) return handle
; /* failed */
385 if (ptr
) HeapFree( GetProcessHeap(), 0, ptr
);
390 /***********************************************************************
391 * WIN16_GlobalLock16 (KERNEL.18)
393 * This is the GlobalLock16() function used by 16-bit code.
395 SEGPTR WINAPI
WIN16_GlobalLock16( HGLOBAL16 handle
)
397 WORD sel
= GlobalHandleToSel16( handle
);
398 TRACE("(%04x) -> %08lx\n", handle
, MAKELONG( 0, sel
) );
402 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
404 if (!VALID_HANDLE(handle
)) {
405 WARN("Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle
);
408 else if (!GET_ARENA_PTR(handle
)->base
)
411 GET_ARENA_PTR(handle
)->lockCount
++;
414 CURRENT_STACK16
->ecx
= sel
; /* selector must be returned in CX as well */
415 return PTR_SEG_OFF_TO_SEGPTR( sel
, 0 );
419 /***********************************************************************
420 * GlobalLock16 (KERNEL.18)
422 * This is the GlobalLock16() function used by 32-bit code.
425 * Pointer to first byte of memory block
428 LPVOID WINAPI
GlobalLock16(
429 HGLOBAL16 handle
/* [in] Handle of global memory object */
431 if (!handle
) return 0;
432 if (!VALID_HANDLE(handle
))
434 GET_ARENA_PTR(handle
)->lockCount
++;
435 return (LPVOID
)GET_ARENA_PTR(handle
)->base
;
439 /***********************************************************************
440 * GlobalUnlock16 (KERNEL.19)
442 * Should the return values be cast to booleans?
445 * TRUE: Object is still locked
446 * FALSE: Object is unlocked
448 BOOL16 WINAPI
GlobalUnlock16(
449 HGLOBAL16 handle
/* [in] Handle of global memory object */
451 GLOBALARENA
*pArena
= GET_ARENA_PTR(handle
);
452 if (!VALID_HANDLE(handle
)) {
453 WARN("Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle
);
456 TRACE("%04x\n", handle
);
457 if (pArena
->lockCount
) pArena
->lockCount
--;
458 return pArena
->lockCount
;
461 /***********************************************************************
462 * GlobalChangeLockCount (KERNEL.365)
464 * This is declared as a register function as it has to preserve
465 * *all* registers, even AX/DX !
468 void WINAPI
GlobalChangeLockCount16( HGLOBAL16 handle
, INT16 delta
,
472 GlobalLock16( handle
);
473 else if ( delta
== -1 )
474 GlobalUnlock16( handle
);
476 ERR("(%04X, %d): strange delta value\n", handle
, delta
);
479 /***********************************************************************
480 * GlobalSize16 (KERNEL.20)
482 * Size in bytes of object
485 DWORD WINAPI
GlobalSize16(
486 HGLOBAL16 handle
/* [in] Handle of global memory object */
488 TRACE("%04x\n", handle
);
489 if (!handle
) return 0;
490 if (!VALID_HANDLE(handle
))
492 return GET_ARENA_PTR(handle
)->size
;
496 /***********************************************************************
497 * GlobalHandle16 (KERNEL.21)
499 * Why is GlobalHandleToSel used here with the sel as input?
505 DWORD WINAPI
GlobalHandle16(
506 WORD sel
/* [in] Address of global memory block */
508 TRACE("%04x\n", sel
);
509 if (!VALID_HANDLE(sel
)) {
510 WARN("Invalid handle 0x%04x passed to GlobalHandle16!\n",sel
);
513 return MAKELONG( GET_ARENA_PTR(sel
)->handle
, GlobalHandleToSel16(sel
) );
516 /***********************************************************************
517 * GlobalHandleNoRIP (KERNEL.159)
519 DWORD WINAPI
GlobalHandleNoRIP16( WORD sel
)
522 for (i
= globalArenaSize
-1 ; i
>=0 ; i
--) {
523 if (pGlobalArena
[i
].size
!=0 && pGlobalArena
[i
].handle
== sel
)
524 return MAKELONG( GET_ARENA_PTR(sel
)->handle
, GlobalHandleToSel16(sel
) );
530 /***********************************************************************
531 * GlobalFlags16 (KERNEL.22)
533 * Should this return GMEM_INVALID_HANDLE instead of 0 on invalid
537 * Value specifying flags and lock count
538 * GMEM_INVALID_HANDLE: Invalid handle
540 UINT16 WINAPI
GlobalFlags16(
541 HGLOBAL16 handle
/* [in] Handle of global memory object */
545 TRACE("%04x\n", handle
);
546 if (!VALID_HANDLE(handle
)) {
547 WARN("Invalid handle 0x%04x passed to GlobalFlags16!\n",handle
);
550 pArena
= GET_ARENA_PTR(handle
);
551 return pArena
->lockCount
|
552 ((pArena
->flags
& GA_DISCARDABLE
) ? GMEM_DISCARDABLE
: 0) |
553 ((pArena
->base
== 0) ? GMEM_DISCARDED
: 0);
557 /***********************************************************************
558 * LockSegment16 (KERNEL.23)
560 HGLOBAL16 WINAPI
LockSegment16( HGLOBAL16 handle
)
562 TRACE("%04x\n", handle
);
563 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
564 if (!VALID_HANDLE(handle
)) {
565 WARN("Invalid handle 0x%04x passed to LockSegment16!\n",handle
);
568 GET_ARENA_PTR(handle
)->lockCount
++;
573 /***********************************************************************
574 * UnlockSegment16 (KERNEL.24)
576 void WINAPI
UnlockSegment16( HGLOBAL16 handle
)
578 TRACE("%04x\n", handle
);
579 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
580 if (!VALID_HANDLE(handle
)) {
581 WARN("Invalid handle 0x%04x passed to UnlockSegment16!\n",handle
);
584 GET_ARENA_PTR(handle
)->lockCount
--;
585 /* FIXME: this ought to return the lock count in CX (go figure...) */
589 /***********************************************************************
590 * GlobalCompact16 (KERNEL.25)
592 DWORD WINAPI
GlobalCompact16( DWORD desired
)
594 return GLOBAL_MAX_ALLOC_SIZE
;
598 /***********************************************************************
599 * GlobalFreeAll (KERNEL.26)
601 void WINAPI
GlobalFreeAll16( HGLOBAL16 owner
)
606 pArena
= pGlobalArena
;
607 for (i
= 0; i
< globalArenaSize
; i
++, pArena
++)
609 if ((pArena
->size
!= 0) && (pArena
->hOwner
== owner
))
610 GlobalFree16( pArena
->handle
);
615 /***********************************************************************
616 * GlobalWire16 (KERNEL.111)
618 SEGPTR WINAPI
GlobalWire16( HGLOBAL16 handle
)
620 return WIN16_GlobalLock16( handle
);
624 /***********************************************************************
625 * GlobalUnWire16 (KERNEL.112)
627 BOOL16 WINAPI
GlobalUnWire16( HGLOBAL16 handle
)
629 return !GlobalUnlock16( handle
);
633 /***********************************************************************
634 * SetSwapAreaSize16 (KERNEL.106)
636 LONG WINAPI
SetSwapAreaSize16( WORD size
)
638 FIXME("(%d) - stub!\n", size
);
639 return MAKELONG( size
, 0xffff );
643 /***********************************************************************
644 * GlobalLRUOldest (KERNEL.163)
646 HGLOBAL16 WINAPI
GlobalLRUOldest16( HGLOBAL16 handle
)
648 TRACE("%04x\n", handle
);
649 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
654 /***********************************************************************
655 * GlobalLRUNewest (KERNEL.164)
657 HGLOBAL16 WINAPI
GlobalLRUNewest16( HGLOBAL16 handle
)
659 TRACE("%04x\n", handle
);
660 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
665 /***********************************************************************
666 * GetFreeSpace16 (KERNEL.169)
668 DWORD WINAPI
GetFreeSpace16( UINT16 wFlags
)
671 GlobalMemoryStatus( &ms
);
672 return ms
.dwAvailVirtual
;
675 /***********************************************************************
676 * GlobalDOSAlloc (KERNEL.184)
678 * Address (HW=Paragraph segment; LW=Selector)
680 DWORD WINAPI
GlobalDOSAlloc16(
681 DWORD size
/* [in] Number of bytes to be allocated */
684 LPVOID lpBlock
= DOSMEM_GetBlock( size
, &uParagraph
);
688 HMODULE16 hModule
= GetModuleHandle16("KERNEL");
692 wSelector
= GLOBAL_CreateBlock(GMEM_FIXED
, lpBlock
, size
, hModule
, WINE_LDT_FLAGS_DATA
);
693 pArena
= GET_ARENA_PTR(wSelector
);
694 pArena
->flags
|= GA_DOSMEM
;
695 return MAKELONG(wSelector
,uParagraph
);
701 /***********************************************************************
702 * GlobalDOSFree (KERNEL.185)
707 WORD WINAPI
GlobalDOSFree16(
708 WORD sel
/* [in] Selector */
710 DWORD block
= GetSelectorBase(sel
);
712 if( block
&& block
< 0x100000 )
714 LPVOID lpBlock
= DOSMEM_MapDosToLinear( block
);
715 if( DOSMEM_FreeBlock( lpBlock
) )
716 GLOBAL_FreeBlock( sel
);
723 /***********************************************************************
724 * GlobalPageLock (KERNEL.191)
726 WORD WINAPI
GlobalPageLock16( HGLOBAL16 handle
)
728 TRACE("%04x\n", handle
);
729 if (!VALID_HANDLE(handle
)) {
730 WARN("Invalid handle 0x%04x passed to GlobalPageLock!\n",handle
);
733 return ++(GET_ARENA_PTR(handle
)->pageLockCount
);
737 /***********************************************************************
738 * GlobalPageUnlock (KERNEL.192)
740 WORD WINAPI
GlobalPageUnlock16( HGLOBAL16 handle
)
742 TRACE("%04x\n", handle
);
743 if (!VALID_HANDLE(handle
)) {
744 WARN("Invalid handle 0x%04x passed to GlobalPageUnlock!\n",handle
);
747 return --(GET_ARENA_PTR(handle
)->pageLockCount
);
751 /***********************************************************************
752 * GlobalFix16 (KERNEL.197)
754 WORD WINAPI
GlobalFix16( HGLOBAL16 handle
)
756 TRACE("%04x\n", handle
);
757 if (!VALID_HANDLE(handle
)) {
758 WARN("Invalid handle 0x%04x passed to GlobalFix16!\n",handle
);
761 GET_ARENA_PTR(handle
)->lockCount
++;
763 return GlobalHandleToSel16(handle
);
767 /***********************************************************************
768 * GlobalUnfix16 (KERNEL.198)
770 void WINAPI
GlobalUnfix16( HGLOBAL16 handle
)
772 TRACE("%04x\n", handle
);
773 if (!VALID_HANDLE(handle
)) {
774 WARN("Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle
);
777 GET_ARENA_PTR(handle
)->lockCount
--;
781 /***********************************************************************
782 * FarSetOwner (KERNEL.403)
784 void WINAPI
FarSetOwner16( HGLOBAL16 handle
, HANDLE16 hOwner
)
786 if (!VALID_HANDLE(handle
)) {
787 WARN("Invalid handle 0x%04x passed to FarSetOwner!\n",handle
);
790 GET_ARENA_PTR(handle
)->hOwner
= hOwner
;
794 /***********************************************************************
795 * FarGetOwner (KERNEL.404)
797 HANDLE16 WINAPI
FarGetOwner16( HGLOBAL16 handle
)
799 if (!VALID_HANDLE(handle
)) {
800 WARN("Invalid handle 0x%04x passed to FarGetOwner!\n",handle
);
803 return GET_ARENA_PTR(handle
)->hOwner
;
807 /***********************************************************************
808 * GlobalHandleToSel (TOOLHELP.50)
810 WORD WINAPI
GlobalHandleToSel16( HGLOBAL16 handle
)
812 if (!handle
) return 0;
813 if (!VALID_HANDLE(handle
)) {
814 WARN("Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle
);
819 WARN("Program attempted invalid selector conversion\n" );
826 /***********************************************************************
827 * GlobalFirst (TOOLHELP.51)
829 BOOL16 WINAPI
GlobalFirst16( GLOBALENTRY
*pGlobal
, WORD wFlags
)
831 if (wFlags
== GLOBAL_LRU
) return FALSE
;
833 return GlobalNext16( pGlobal
, wFlags
);
837 /***********************************************************************
838 * GlobalNext (TOOLHELP.52)
840 BOOL16 WINAPI
GlobalNext16( GLOBALENTRY
*pGlobal
, WORD wFlags
)
844 if (pGlobal
->dwNext
>= globalArenaSize
) return FALSE
;
845 pArena
= pGlobalArena
+ pGlobal
->dwNext
;
846 if (wFlags
== GLOBAL_FREE
) /* only free blocks */
849 for (i
= pGlobal
->dwNext
; i
< globalArenaSize
; i
++, pArena
++)
850 if (pArena
->size
== 0) break; /* block is free */
851 if (i
>= globalArenaSize
) return FALSE
;
855 pGlobal
->dwAddress
= pArena
->base
;
856 pGlobal
->dwBlockSize
= pArena
->size
;
857 pGlobal
->hBlock
= pArena
->handle
;
858 pGlobal
->wcLock
= pArena
->lockCount
;
859 pGlobal
->wcPageLock
= pArena
->pageLockCount
;
860 pGlobal
->wFlags
= (GetCurrentPDB16() == pArena
->hOwner
);
861 pGlobal
->wHeapPresent
= FALSE
;
862 pGlobal
->hOwner
= pArena
->hOwner
;
863 pGlobal
->wType
= GT_UNKNOWN
;
870 /***********************************************************************
871 * GlobalInfo (TOOLHELP.53)
873 BOOL16 WINAPI
GlobalInfo16( GLOBALINFO
*pInfo
)
878 pInfo
->wcItems
= globalArenaSize
;
879 pInfo
->wcItemsFree
= 0;
880 pInfo
->wcItemsLRU
= 0;
881 for (i
= 0, pArena
= pGlobalArena
; i
< globalArenaSize
; i
++, pArena
++)
882 if (pArena
->size
== 0) pInfo
->wcItemsFree
++;
887 /***********************************************************************
888 * GlobalEntryHandle (TOOLHELP.54)
890 BOOL16 WINAPI
GlobalEntryHandle16( GLOBALENTRY
*pGlobal
, HGLOBAL16 hItem
)
892 GLOBALARENA
*pArena
= GET_ARENA_PTR(hItem
);
894 pGlobal
->dwAddress
= pArena
->base
;
895 pGlobal
->dwBlockSize
= pArena
->size
;
896 pGlobal
->hBlock
= pArena
->handle
;
897 pGlobal
->wcLock
= pArena
->lockCount
;
898 pGlobal
->wcPageLock
= pArena
->pageLockCount
;
899 pGlobal
->wFlags
= (GetCurrentPDB16() == pArena
->hOwner
);
900 pGlobal
->wHeapPresent
= FALSE
;
901 pGlobal
->hOwner
= pArena
->hOwner
;
902 pGlobal
->wType
= GT_UNKNOWN
;
909 /***********************************************************************
910 * GlobalEntryModule (TOOLHELP.55)
912 BOOL16 WINAPI
GlobalEntryModule16( GLOBALENTRY
*pGlobal
, HMODULE16 hModule
,
915 FIXME("(%p, 0x%04x, 0x%04x), stub.\n", pGlobal
, hModule
, wSeg
);
920 /***********************************************************************
921 * MemManInfo (TOOLHELP.72)
923 BOOL16 WINAPI
MemManInfo16( MEMMANINFO
*info
)
928 * Not unsurprisingly although the documention says you
929 * _must_ provide the size in the dwSize field, this function
930 * (under Windows) always fills the structure and returns true.
932 GlobalMemoryStatus( &status
);
933 info
->wPageSize
= VIRTUAL_GetPageSize();
934 info
->dwLargestFreeBlock
= status
.dwAvailVirtual
;
935 info
->dwMaxPagesAvailable
= info
->dwLargestFreeBlock
/ info
->wPageSize
;
936 info
->dwMaxPagesLockable
= info
->dwMaxPagesAvailable
;
937 info
->dwTotalLinearSpace
= status
.dwTotalVirtual
/ info
->wPageSize
;
938 info
->dwTotalUnlockedPages
= info
->dwTotalLinearSpace
;
939 info
->dwFreePages
= info
->dwMaxPagesAvailable
;
940 info
->dwTotalPages
= info
->dwTotalLinearSpace
;
941 info
->dwFreeLinearSpace
= info
->dwMaxPagesAvailable
;
942 info
->dwSwapFilePages
= status
.dwTotalPageFile
/ info
->wPageSize
;
946 /***********************************************************************
947 * GetFreeMemInfo (KERNEL.316)
949 DWORD WINAPI
GetFreeMemInfo16(void)
952 MemManInfo16( &info
);
953 return MAKELONG( info
.dwTotalLinearSpace
, info
.dwMaxPagesAvailable
);
957 * Win32 Global heap functions (GlobalXXX).
958 * These functions included in Win32 for compatibility with 16 bit Windows
959 * Especially the moveable blocks and handles are oldish.
960 * But the ability to directly allocate memory with GPTR and LPTR is widely
963 * The handle stuff looks horrible, but it's implemented almost like Win95
968 #define MAGIC_GLOBAL_USED 0x5342
969 #define GLOBAL_LOCK_MAX 0xFF
970 #define HANDLE_TO_INTERN(h) ((PGLOBAL32_INTERN)(((char *)(h))-2))
971 #define INTERN_TO_HANDLE(i) ((HGLOBAL) &((i)->Pointer))
972 #define POINTER_TO_HANDLE(p) (*(((HGLOBAL *)(p))-1))
973 #define ISHANDLE(h) (((DWORD)(h)&2)!=0)
974 #define ISPOINTER(h) (((DWORD)(h)&2)==0)
976 typedef struct __GLOBAL32_INTERN
979 LPVOID Pointer WINE_PACKED
;
982 } GLOBAL32_INTERN
, *PGLOBAL32_INTERN
;
984 /***********************************************************************
987 * Returns the appropriate heap to be used. If the object was created
988 * With GMEM_DDESHARE we allocated it on the system heap.
990 static HANDLE
GLOBAL_GetHeap( HGLOBAL hmem
)
994 TRACE("() hmem=%x\n", hmem
);
996 /* Get the appropriate heap to be used for this object */
998 heap
= GetProcessHeap();
1001 PGLOBAL32_INTERN pintern
;
1002 pintern
=HANDLE_TO_INTERN(hmem
);
1004 /* If it was DDESHARE it was created on the shared system heap */
1005 pintern
=HANDLE_TO_INTERN(hmem
);
1006 heap
= ( pintern
->Flags
& (GMEM_DDESHARE
>> 8) )
1007 ? SystemHeap
: GetProcessHeap();
1013 /***********************************************************************
1014 * GlobalAlloc (KERNEL32.315)
1019 HGLOBAL WINAPI
GlobalAlloc(
1020 UINT flags
, /* [in] Object allocation attributes */
1021 DWORD size
/* [in] Number of bytes to allocate */
1023 PGLOBAL32_INTERN pintern
;
1027 if(flags
&GMEM_ZEROINIT
)
1028 hpflags
=HEAP_ZERO_MEMORY
;
1032 TRACE("() flags=%04x\n", flags
);
1034 if((flags
& GMEM_MOVEABLE
)==0) /* POINTER */
1036 palloc
=HeapAlloc(GetProcessHeap(), hpflags
, size
);
1037 return (HGLOBAL
) palloc
;
1043 /* If DDESHARE is set, create on the shared system heap */
1044 heap
= (flags
& GMEM_DDESHARE
) ? SystemHeap
: GetProcessHeap();
1046 /* HeapLock(heap); */
1048 pintern
=HeapAlloc(heap
, 0, sizeof(GLOBAL32_INTERN
));
1049 if (!pintern
) return NULL
;
1052 size
= (size
+ 0x1f) & ~0x1f;
1053 if (!(palloc
=HeapAlloc(heap
, hpflags
, size
+sizeof(HGLOBAL
)))) {
1054 HeapFree(heap
, 0, pintern
);
1057 *(HGLOBAL
*)palloc
=INTERN_TO_HANDLE(pintern
);
1058 pintern
->Pointer
=(char *) palloc
+sizeof(HGLOBAL
);
1061 pintern
->Pointer
=NULL
;
1062 pintern
->Magic
=MAGIC_GLOBAL_USED
;
1063 pintern
->Flags
=flags
>>8;
1064 pintern
->LockCount
=0;
1066 /* HeapUnlock(heap); */
1068 return INTERN_TO_HANDLE(pintern
);
1073 /***********************************************************************
1074 * GlobalLock (KERNEL32.326)
1076 * Pointer to first byte of block
1079 LPVOID WINAPI
GlobalLock(
1080 HGLOBAL hmem
/* [in] Handle of global memory object */
1082 PGLOBAL32_INTERN pintern
;
1086 return (LPVOID
) hmem
;
1088 /* HeapLock(GetProcessHeap()); */
1090 pintern
=HANDLE_TO_INTERN(hmem
);
1091 if(pintern
->Magic
==MAGIC_GLOBAL_USED
)
1093 if(pintern
->LockCount
<GLOBAL_LOCK_MAX
)
1094 pintern
->LockCount
++;
1095 palloc
=pintern
->Pointer
;
1099 WARN("invalid handle\n");
1100 palloc
=(LPVOID
) NULL
;
1101 SetLastError(ERROR_INVALID_HANDLE
);
1103 /* HeapUnlock(GetProcessHeap()); */;
1108 /***********************************************************************
1109 * GlobalUnlock (KERNEL32.332)
1111 * TRUE: Object is still locked
1112 * FALSE: Object is unlocked
1114 BOOL WINAPI
GlobalUnlock(
1115 HGLOBAL hmem
/* [in] Handle of global memory object */
1117 PGLOBAL32_INTERN pintern
;
1123 /* HeapLock(GetProcessHeap()); */
1124 pintern
=HANDLE_TO_INTERN(hmem
);
1126 if(pintern
->Magic
==MAGIC_GLOBAL_USED
)
1128 if((pintern
->LockCount
<GLOBAL_LOCK_MAX
)&&(pintern
->LockCount
>0))
1129 pintern
->LockCount
--;
1131 locked
=(pintern
->LockCount
==0) ? FALSE
: TRUE
;
1135 WARN("invalid handle\n");
1138 /* HeapUnlock(GetProcessHeap()); */
1143 /***********************************************************************
1144 * GlobalHandle (KERNEL32.325)
1145 * Returns the handle associated with the specified pointer.
1151 HGLOBAL WINAPI
GlobalHandle(
1152 LPCVOID pmem
/* [in] Pointer to global memory block */
1156 PGLOBAL32_INTERN maybe_intern
;
1161 SetLastError( ERROR_INVALID_PARAMETER
);
1169 /* note that if pmem is a pointer to a a block allocated by */
1170 /* GlobalAlloc with GMEM_MOVEABLE then magic test in HeapValidate */
1172 if (ISPOINTER(pmem
)) {
1173 heap
= GLOBAL_GetHeap( (HGLOBAL
)pmem
);
1174 if (HeapValidate( heap
, 0, pmem
)) {
1175 handle
= (HGLOBAL
)pmem
; /* valid fixed block */
1178 handle
= POINTER_TO_HANDLE(pmem
);
1180 handle
= (HGLOBAL
)pmem
;
1182 /* Now test handle either passed in or retrieved from pointer */
1183 heap
= GLOBAL_GetHeap( handle
);
1184 maybe_intern
= HANDLE_TO_INTERN( handle
);
1185 if (maybe_intern
->Magic
== MAGIC_GLOBAL_USED
) {
1186 test
= maybe_intern
->Pointer
;
1187 if (HeapValidate( heap
, 0, ((HGLOBAL
*)test
)-1 ) && /* obj(-handle) valid arena? */
1188 HeapValidate( heap
, 0, maybe_intern
)) /* intern valid arena? */
1189 break; /* valid moveable block */
1192 SetLastError( ERROR_INVALID_HANDLE
);
1194 __EXCEPT(page_fault
)
1196 SetLastError( ERROR_INVALID_HANDLE
);
1205 /***********************************************************************
1206 * GlobalReAlloc (KERNEL32.328)
1211 HGLOBAL WINAPI
GlobalReAlloc(
1212 HGLOBAL hmem
, /* [in] Handle of global memory object */
1213 DWORD size
, /* [in] New size of block */
1214 UINT flags
/* [in] How to reallocate object */
1218 PGLOBAL32_INTERN pintern
;
1219 HANDLE heap
= GLOBAL_GetHeap( hmem
);
1220 DWORD heap_flags
= (flags
& GMEM_ZEROINIT
) ? HEAP_ZERO_MEMORY
: 0;
1223 /* HeapLock(heap); */
1224 if(flags
& GMEM_MODIFY
) /* modify flags */
1226 if( ISPOINTER(hmem
) && (flags
& GMEM_MOVEABLE
))
1228 /* make a fixed block moveable
1229 * actually only NT is able to do this. But it's soo simple
1233 ERR("GlobalReAlloc32 with null handle!\n");
1234 SetLastError( ERROR_NOACCESS
);
1237 size
=HeapSize(heap
, 0, (LPVOID
) hmem
);
1238 hnew
=GlobalAlloc( flags
, size
);
1239 palloc
=GlobalLock(hnew
);
1240 memcpy(palloc
, (LPVOID
) hmem
, size
);
1244 else if( ISPOINTER(hmem
) &&(flags
& GMEM_DISCARDABLE
))
1246 /* change the flags to make our block "discardable" */
1247 pintern
=HANDLE_TO_INTERN(hmem
);
1248 pintern
->Flags
= pintern
->Flags
| (GMEM_DISCARDABLE
>> 8);
1253 SetLastError(ERROR_INVALID_PARAMETER
);
1261 /* reallocate fixed memory */
1262 hnew
=(HGLOBAL
)HeapReAlloc(heap
, heap_flags
, (LPVOID
) hmem
, size
);
1266 /* reallocate a moveable block */
1267 pintern
=HANDLE_TO_INTERN(hmem
);
1270 /* Apparently Windows doesn't care whether the handle is locked at this point */
1271 /* See also the same comment in GlobalFree() */
1272 if(pintern
->LockCount
>1) {
1273 ERR("handle 0x%08lx is still locked, cannot realloc!\n",(DWORD
)hmem
);
1274 SetLastError(ERROR_INVALID_HANDLE
);
1280 if(pintern
->Pointer
)
1282 if((palloc
= HeapReAlloc(heap
, heap_flags
,
1283 (char *) pintern
->Pointer
-sizeof(HGLOBAL
),
1284 size
+sizeof(HGLOBAL
))) == NULL
)
1285 return 0; /* Block still valid */
1286 pintern
->Pointer
=(char *) palloc
+sizeof(HGLOBAL
);
1290 if((palloc
=HeapAlloc(heap
, heap_flags
, size
+sizeof(HGLOBAL
)))
1293 *(HGLOBAL
*)palloc
=hmem
;
1294 pintern
->Pointer
=(char *) palloc
+sizeof(HGLOBAL
);
1299 if(pintern
->Pointer
)
1301 HeapFree(heap
, 0, (char *) pintern
->Pointer
-sizeof(HGLOBAL
));
1302 pintern
->Pointer
=NULL
;
1307 /* HeapUnlock(heap); */
1312 /***********************************************************************
1313 * GlobalFree (KERNEL32.322)
1318 HGLOBAL WINAPI
GlobalFree(
1319 HGLOBAL hmem
/* [in] Handle of global memory object */
1321 PGLOBAL32_INTERN pintern
;
1322 HGLOBAL hreturned
= 0;
1323 HANDLE heap
= GLOBAL_GetHeap( hmem
);
1325 if(ISPOINTER(hmem
)) /* POINTER */
1327 if(!HeapFree(heap
, 0, (LPVOID
) hmem
)) hmem
= 0;
1331 /* HeapLock(heap); */
1332 pintern
=HANDLE_TO_INTERN(hmem
);
1334 if(pintern
->Magic
==MAGIC_GLOBAL_USED
)
1337 /* WIN98 does not make this test. That is you can free a */
1338 /* block you have not unlocked. Go figure!! */
1339 /* if(pintern->LockCount!=0) */
1340 /* SetLastError(ERROR_INVALID_HANDLE); */
1342 if(pintern
->Pointer
)
1343 if(!HeapFree(heap
, 0,
1344 (char *)(pintern
->Pointer
)-sizeof(HGLOBAL
)))
1346 if(!HeapFree(heap
, 0, pintern
))
1349 /* HeapUnlock(heap); */
1355 /***********************************************************************
1356 * GlobalSize (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
;
1366 HANDLE heap
= GLOBAL_GetHeap( hmem
);
1370 retval
=HeapSize(heap
, 0, (LPVOID
) hmem
);
1374 /* HeapLock(heap); */
1375 pintern
=HANDLE_TO_INTERN(hmem
);
1377 if(pintern
->Magic
==MAGIC_GLOBAL_USED
)
1379 if (!pintern
->Pointer
) /* handle case of GlobalAlloc( ??,0) */
1381 retval
=HeapSize(heap
, 0,
1382 (char *)(pintern
->Pointer
)-sizeof(HGLOBAL
))-4;
1383 if (retval
== 0xffffffff-4) retval
= 0;
1387 WARN("invalid handle\n");
1390 /* HeapUnlock(heap); */
1392 /* HeapSize returns 0xffffffff on failure */
1393 if (retval
== 0xffffffff) retval
= 0;
1398 /***********************************************************************
1399 * GlobalWire (KERNEL32.333)
1401 LPVOID WINAPI
GlobalWire(HGLOBAL hmem
)
1403 return GlobalLock( hmem
);
1407 /***********************************************************************
1408 * GlobalUnWire (KERNEL32.330)
1410 BOOL WINAPI
GlobalUnWire(HGLOBAL hmem
)
1412 return GlobalUnlock( hmem
);
1416 /***********************************************************************
1417 * GlobalFix (KERNEL32.320)
1419 VOID WINAPI
GlobalFix(HGLOBAL hmem
)
1425 /***********************************************************************
1426 * GlobalUnfix (KERNEL32.331)
1428 VOID WINAPI
GlobalUnfix(HGLOBAL hmem
)
1430 GlobalUnlock( hmem
);
1434 /***********************************************************************
1435 * GlobalFlags (KERNEL32.321)
1436 * Returns information about the specified global memory object
1439 * Should this return GMEM_INVALID_HANDLE on invalid handle?
1442 * Value specifying allocation flags and lock count
1443 * GMEM_INVALID_HANDLE: Failure
1445 UINT WINAPI
GlobalFlags(
1446 HGLOBAL hmem
/* [in] Handle to global memory object */
1449 PGLOBAL32_INTERN pintern
;
1457 /* HeapLock(GetProcessHeap()); */
1458 pintern
=HANDLE_TO_INTERN(hmem
);
1459 if(pintern
->Magic
==MAGIC_GLOBAL_USED
)
1461 retval
=pintern
->LockCount
+ (pintern
->Flags
<<8);
1462 if(pintern
->Pointer
==0)
1463 retval
|= GMEM_DISCARDED
;
1467 WARN("Invalid handle: %04x", hmem
);
1470 /* HeapUnlock(GetProcessHeap()); */
1476 /***********************************************************************
1477 * GlobalCompact (KERNEL32.316)
1479 DWORD WINAPI
GlobalCompact( DWORD minfree
)
1481 return 0; /* GlobalCompact does nothing in Win32 */
1485 /***********************************************************************
1486 * GlobalMemoryStatus (KERNEL32.327)
1490 VOID WINAPI
GlobalMemoryStatus(
1491 LPMEMORYSTATUS lpmem
1493 static MEMORYSTATUS cached_memstatus
;
1494 static int cache_lastchecked
= 0;
1500 if (time(NULL
)==cache_lastchecked
) {
1501 memcpy(lpmem
,&cached_memstatus
,sizeof(MEMORYSTATUS
));
1504 cache_lastchecked
= time(NULL
);
1507 f
= fopen( "/proc/meminfo", "r" );
1511 int total
, used
, free
, shared
, buffers
, cached
;
1513 lpmem
->dwLength
= sizeof(MEMORYSTATUS
);
1514 lpmem
->dwTotalPhys
= lpmem
->dwAvailPhys
= 0;
1515 lpmem
->dwTotalPageFile
= lpmem
->dwAvailPageFile
= 0;
1516 while (fgets( buffer
, sizeof(buffer
), f
))
1518 /* old style /proc/meminfo ... */
1519 if (sscanf( buffer
, "Mem: %d %d %d %d %d %d", &total
, &used
, &free
, &shared
, &buffers
, &cached
))
1521 lpmem
->dwTotalPhys
+= total
;
1522 lpmem
->dwAvailPhys
+= free
+ buffers
+ cached
;
1524 if (sscanf( buffer
, "Swap: %d %d %d", &total
, &used
, &free
))
1526 lpmem
->dwTotalPageFile
+= total
;
1527 lpmem
->dwAvailPageFile
+= free
;
1530 /* new style /proc/meminfo ... */
1531 if (sscanf(buffer
, "MemTotal: %d", &total
))
1532 lpmem
->dwTotalPhys
= total
*1024;
1533 if (sscanf(buffer
, "MemFree: %d", &free
))
1534 lpmem
->dwAvailPhys
= free
*1024;
1535 if (sscanf(buffer
, "SwapTotal: %d", &total
))
1536 lpmem
->dwTotalPageFile
= total
*1024;
1537 if (sscanf(buffer
, "SwapFree: %d", &free
))
1538 lpmem
->dwAvailPageFile
= free
*1024;
1539 if (sscanf(buffer
, "Buffers: %d", &buffers
))
1540 lpmem
->dwAvailPhys
+= buffers
*1024;
1541 if (sscanf(buffer
, "Cached: %d", &cached
))
1542 lpmem
->dwAvailPhys
+= cached
*1024;
1546 if (lpmem
->dwTotalPhys
)
1548 DWORD TotalPhysical
= lpmem
->dwTotalPhys
+lpmem
->dwTotalPageFile
;
1549 DWORD AvailPhysical
= lpmem
->dwAvailPhys
+lpmem
->dwAvailPageFile
;
1550 lpmem
->dwMemoryLoad
= (TotalPhysical
-AvailPhysical
)
1551 / (TotalPhysical
/ 100);
1556 /* FIXME: should do something for other systems */
1557 lpmem
->dwMemoryLoad
= 0;
1558 lpmem
->dwTotalPhys
= 16*1024*1024;
1559 lpmem
->dwAvailPhys
= 16*1024*1024;
1560 lpmem
->dwTotalPageFile
= 16*1024*1024;
1561 lpmem
->dwAvailPageFile
= 16*1024*1024;
1564 lpmem
->dwTotalVirtual
= si
.lpMaximumApplicationAddress
-si
.lpMinimumApplicationAddress
;
1565 /* FIXME: we should track down all the already allocated VM pages and substract them, for now arbitrarily remove 64KB so that it matches NT */
1566 lpmem
->dwAvailVirtual
= lpmem
->dwTotalVirtual
-64*1024;
1567 memcpy(&cached_memstatus
,lpmem
,sizeof(MEMORYSTATUS
));
1570 /***********************************************************************
1571 * A20Proc16 (KERNEL.165)
1573 void WINAPI
A20Proc16( WORD unused
)
1575 /* this is also a NOP in Windows */
1578 /***********************************************************************
1579 * LimitEMSPages16 (KERNEL.156)
1581 DWORD WINAPI
LimitEMSPages16( DWORD unused
)