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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 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
;
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("%ld 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)
263 HGLOBAL16 WINAPI
GlobalAlloc16(
264 UINT16 flags
, /* [in] Object allocation attributes */
265 DWORD size
/* [in] Number of bytes to allocate */
267 HANDLE16 owner
= GetCurrentPDB16();
269 if (flags
& GMEM_DDESHARE
)
270 owner
= GetExePtr(owner
); /* Make it a module handle */
271 return GLOBAL_Alloc( flags
, size
, owner
, WINE_LDT_FLAGS_DATA
);
275 /***********************************************************************
276 * GlobalReAlloc (KERNEL.16)
281 HGLOBAL16 WINAPI
GlobalReAlloc16(
282 HGLOBAL16 handle
, /* [in] Handle of global memory object */
283 DWORD size
, /* [in] New size of block */
284 UINT16 flags
/* [in] How to reallocate object */
289 GLOBALARENA
*pArena
, *pNewArena
;
290 WORD sel
= GlobalHandleToSel16( handle
);
292 TRACE("%04x %ld flags=%04x\n",
293 handle
, size
, flags
);
294 if (!handle
) return 0;
296 if (!VALID_HANDLE(handle
))
298 WARN("Invalid handle 0x%04x!\n", handle
);
301 pArena
= GET_ARENA_PTR( handle
);
303 /* Discard the block if requested */
305 if ((size
== 0) && (flags
& GMEM_MOVEABLE
) && !(flags
& GMEM_MODIFY
))
307 if (!(pArena
->flags
& GA_MOVEABLE
) ||
308 !(pArena
->flags
& GA_DISCARDABLE
) ||
309 (pArena
->lockCount
> 0) || (pArena
->pageLockCount
> 0)) return 0;
310 if (pArena
->flags
& GA_DOSMEM
)
311 DOSMEM_FreeBlock( (void *)pArena
->base
);
313 HeapFree( GetProcessHeap(), 0, (void *)pArena
->base
);
316 /* Note: we rely on the fact that SELECTOR_ReallocBlock won't
317 * change the selector if we are shrinking the block.
318 * FIXME: shouldn't we keep selectors until the block is deleted?
320 SELECTOR_ReallocBlock( sel
, 0, 1 );
326 if (size
> GLOBAL_MAX_ALLOC_SIZE
- 0x20) return 0;
327 if (size
== 0) size
= 0x20;
328 else size
= (size
+ 0x1f) & ~0x1f;
330 /* Change the flags */
332 if (flags
& GMEM_MODIFY
)
334 /* Change the flags, leaving GA_DGROUP alone */
335 pArena
->flags
= (pArena
->flags
& GA_DGROUP
) | (flags
& GA_MOVEABLE
);
336 if (flags
& GMEM_DISCARDABLE
) pArena
->flags
|= GA_DISCARDABLE
;
340 /* Reallocate the linear memory */
342 ptr
= (void *)pArena
->base
;
343 oldsize
= pArena
->size
;
344 TRACE("oldbase %p oldsize %08lx newsize %08lx\n", ptr
,oldsize
,size
);
345 if (ptr
&& (size
== oldsize
)) return handle
; /* Nothing to do */
347 if (pArena
->flags
& GA_DOSMEM
)
349 if (DOSMEM_ResizeBlock(ptr
, size
, TRUE
) == size
)
351 else if(pArena
->pageLockCount
> 0)
355 newptr
= DOSMEM_AllocBlock( size
, 0 );
358 memcpy( newptr
, ptr
, oldsize
);
359 DOSMEM_FreeBlock( ptr
);
366 * if more than one reader (e.g. some pointer has been
367 * given out by GetVDMPointer32W16),
368 * only try to realloc in place
372 newptr
= HeapReAlloc( GetProcessHeap(),
373 (pArena
->pageLockCount
> 0) ? HEAP_REALLOC_IN_PLACE_ONLY
: 0,
376 newptr
= HeapAlloc( GetProcessHeap(),
377 (pArena
->pageLockCount
> 0) ? HEAP_REALLOC_IN_PLACE_ONLY
: 0,
384 FIXME("Realloc failed lock %d\n",pArena
->pageLockCount
);
385 if (pArena
->pageLockCount
<1)
387 if (pArena
->flags
& GA_DOSMEM
)
388 DOSMEM_FreeBlock( (void *)pArena
->base
);
390 HeapFree( GetProcessHeap(), 0, ptr
);
391 SELECTOR_FreeBlock( sel
);
392 memset( pArena
, 0, sizeof(GLOBALARENA
) );
398 /* Reallocate the selector(s) */
400 sel
= SELECTOR_ReallocBlock( sel
, ptr
, size
);
403 if (pArena
->flags
& GA_DOSMEM
)
404 DOSMEM_FreeBlock( (void *)pArena
->base
);
406 HeapFree( GetProcessHeap(), 0, ptr
);
407 memset( pArena
, 0, sizeof(GLOBALARENA
) );
410 selcount
= (size
+ 0xffff) / 0x10000;
412 if (!(pNewArena
= GLOBAL_GetArena( sel
, selcount
)))
414 if (pArena
->flags
& GA_DOSMEM
)
415 DOSMEM_FreeBlock( (void *)pArena
->base
);
417 HeapFree( GetProcessHeap(), 0, ptr
);
418 SELECTOR_FreeBlock( sel
);
422 /* Fill the new arena block
423 As we may have used HEAP_REALLOC_IN_PLACE_ONLY, areas may overlap*/
425 if (pNewArena
!= pArena
) memmove( pNewArena
, pArena
, sizeof(GLOBALARENA
) );
426 pNewArena
->base
= (DWORD
)ptr
;
427 pNewArena
->size
= GetSelectorLimit16(sel
) + 1;
428 pNewArena
->selCount
= selcount
;
429 pNewArena
->handle
= (pNewArena
->flags
& GA_MOVEABLE
) ? sel
- 1 : sel
;
431 if (selcount
> 1) /* clear the next arena blocks */
432 memset( pNewArena
+ 1, 0, (selcount
- 1) * sizeof(GLOBALARENA
) );
434 if ((oldsize
< size
) && (flags
& GMEM_ZEROINIT
))
435 memset( (char *)ptr
+ oldsize
, 0, size
- oldsize
);
436 return pNewArena
->handle
;
440 /***********************************************************************
441 * GlobalFree (KERNEL.17)
442 * GlobalFree16 (KERNEL32.31)
447 HGLOBAL16 WINAPI
GlobalFree16(
448 HGLOBAL16 handle
/* [in] Handle of global memory object */
452 if (!VALID_HANDLE(handle
))
454 WARN("Invalid handle 0x%04x passed to GlobalFree16!\n",handle
);
457 ptr
= (void *)GET_ARENA_PTR(handle
)->base
;
459 TRACE("%04x\n", handle
);
460 if (!GLOBAL_FreeBlock( handle
)) return handle
; /* failed */
461 HeapFree( GetProcessHeap(), 0, ptr
);
466 /**********************************************************************
467 * K32WOWGlobalLock16 (KERNEL32.60)
469 SEGPTR WINAPI
K32WOWGlobalLock16( HGLOBAL16 handle
)
471 WORD sel
= GlobalHandleToSel16( handle
);
472 TRACE("(%04x) -> %08lx\n", handle
, MAKELONG( 0, sel
) );
476 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
478 if (!VALID_HANDLE(handle
)) {
479 WARN("Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle
);
482 else if (!GET_ARENA_PTR(handle
)->base
)
485 GET_ARENA_PTR(handle
)->lockCount
++;
488 return MAKESEGPTR( sel
, 0 );
493 /***********************************************************************
494 * GlobalLock (KERNEL.18)
496 * This is the GlobalLock16() function used by 16-bit code.
498 SEGPTR WINAPI
WIN16_GlobalLock16( HGLOBAL16 handle
)
500 SEGPTR ret
= K32WOWGlobalLock16( handle
);
501 CURRENT_STACK16
->ecx
= SELECTOROF(ret
); /* selector must be returned in CX as well */
506 /***********************************************************************
507 * GlobalLock16 (KERNEL32.25)
509 * This is the GlobalLock16() function used by 32-bit code.
512 * Pointer to first byte of memory block
515 LPVOID WINAPI
GlobalLock16(
516 HGLOBAL16 handle
/* [in] Handle of global memory object */
518 if (!handle
) return 0;
519 if (!VALID_HANDLE(handle
))
521 GET_ARENA_PTR(handle
)->lockCount
++;
522 return (LPVOID
)GET_ARENA_PTR(handle
)->base
;
526 /***********************************************************************
527 * GlobalUnlock (KERNEL.19)
528 * GlobalUnlock16 (KERNEL32.26)
530 * Should the return values be cast to booleans?
533 * TRUE: Object is still locked
534 * FALSE: Object is unlocked
536 BOOL16 WINAPI
GlobalUnlock16(
537 HGLOBAL16 handle
/* [in] Handle of global memory object */
539 GLOBALARENA
*pArena
= GET_ARENA_PTR(handle
);
540 if (!VALID_HANDLE(handle
)) {
541 WARN("Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle
);
544 TRACE("%04x\n", handle
);
545 if (pArena
->lockCount
) pArena
->lockCount
--;
546 return pArena
->lockCount
;
549 /***********************************************************************
550 * GlobalChangeLockCount (KERNEL.365)
552 * This is declared as a register function as it has to preserve
553 * *all* registers, even AX/DX !
556 void WINAPI
GlobalChangeLockCount16( HGLOBAL16 handle
, INT16 delta
,
560 GlobalLock16( handle
);
561 else if ( delta
== -1 )
562 GlobalUnlock16( handle
);
564 ERR("(%04X, %d): strange delta value\n", handle
, delta
);
567 /***********************************************************************
568 * GlobalSize (KERNEL.20)
569 * GlobalSize16 (KERNEL32.32)
571 * Size in bytes of object
574 DWORD WINAPI
GlobalSize16(
575 HGLOBAL16 handle
/* [in] Handle of global memory object */
577 TRACE("%04x\n", handle
);
578 if (!handle
) return 0;
579 if (!VALID_HANDLE(handle
))
581 return GET_ARENA_PTR(handle
)->size
;
585 /***********************************************************************
586 * GlobalHandle (KERNEL.21)
588 * Why is GlobalHandleToSel used here with the sel as input?
594 DWORD WINAPI
GlobalHandle16(
595 WORD sel
/* [in] Address of global memory block */
597 TRACE("%04x\n", sel
);
598 if (!VALID_HANDLE(sel
)) {
599 WARN("Invalid handle 0x%04x passed to GlobalHandle16!\n",sel
);
602 return MAKELONG( GET_ARENA_PTR(sel
)->handle
, GlobalHandleToSel16(sel
) );
605 /***********************************************************************
606 * GlobalHandleNoRIP (KERNEL.159)
608 DWORD WINAPI
GlobalHandleNoRIP16( WORD sel
)
611 for (i
= globalArenaSize
-1 ; i
>=0 ; i
--) {
612 if (pGlobalArena
[i
].size
!=0 && pGlobalArena
[i
].handle
== sel
)
613 return MAKELONG( GET_ARENA_PTR(sel
)->handle
, GlobalHandleToSel16(sel
) );
619 /***********************************************************************
620 * GlobalFlags (KERNEL.22)
623 * Should this return GMEM_INVALID_HANDLE instead of 0 on invalid
627 * Value specifying flags and lock count
628 * GMEM_INVALID_HANDLE: Invalid handle
630 UINT16 WINAPI
GlobalFlags16(
631 HGLOBAL16 handle
/* [in] Handle of global memory object */
635 TRACE("%04x\n", handle
);
636 if (!VALID_HANDLE(handle
)) {
637 WARN("Invalid handle 0x%04x passed to GlobalFlags16!\n",handle
);
640 pArena
= GET_ARENA_PTR(handle
);
641 return pArena
->lockCount
|
642 ((pArena
->flags
& GA_DISCARDABLE
) ? GMEM_DISCARDABLE
: 0) |
643 ((pArena
->base
== 0) ? GMEM_DISCARDED
: 0);
647 /***********************************************************************
648 * LockSegment (KERNEL.23)
650 HGLOBAL16 WINAPI
LockSegment16( HGLOBAL16 handle
)
652 TRACE("%04x\n", handle
);
653 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
654 if (!VALID_HANDLE(handle
)) {
655 WARN("Invalid handle 0x%04x passed to LockSegment16!\n",handle
);
658 GET_ARENA_PTR(handle
)->lockCount
++;
663 /***********************************************************************
664 * UnlockSegment (KERNEL.24)
666 void WINAPI
UnlockSegment16( HGLOBAL16 handle
)
668 TRACE("%04x\n", handle
);
669 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
670 if (!VALID_HANDLE(handle
)) {
671 WARN("Invalid handle 0x%04x passed to UnlockSegment16!\n",handle
);
674 GET_ARENA_PTR(handle
)->lockCount
--;
675 /* FIXME: this ought to return the lock count in CX (go figure...) */
679 /***********************************************************************
680 * GlobalCompact (KERNEL.25)
682 DWORD WINAPI
GlobalCompact16( DWORD desired
)
684 return GLOBAL_MAX_ALLOC_SIZE
;
688 /***********************************************************************
689 * GlobalFreeAll (KERNEL.26)
691 void WINAPI
GlobalFreeAll16( HGLOBAL16 owner
)
696 pArena
= pGlobalArena
;
697 for (i
= 0; i
< globalArenaSize
; i
++, pArena
++)
699 if ((pArena
->size
!= 0) && (pArena
->hOwner
== owner
))
700 GlobalFree16( pArena
->handle
);
705 /***********************************************************************
706 * GlobalWire (KERNEL.111)
707 * GlobalWire16 (KERNEL32.29)
709 SEGPTR WINAPI
GlobalWire16( HGLOBAL16 handle
)
711 return WIN16_GlobalLock16( handle
);
715 /***********************************************************************
716 * GlobalUnWire (KERNEL.112)
717 * GlobalUnWire16 (KERNEL32.30)
719 BOOL16 WINAPI
GlobalUnWire16( HGLOBAL16 handle
)
721 return !GlobalUnlock16( handle
);
725 /***********************************************************************
726 * SetSwapAreaSize (KERNEL.106)
728 LONG WINAPI
SetSwapAreaSize16( WORD size
)
730 FIXME("(%d) - stub!\n", size
);
731 return MAKELONG( size
, 0xffff );
735 /***********************************************************************
736 * GlobalLRUOldest (KERNEL.163)
738 HGLOBAL16 WINAPI
GlobalLRUOldest16( HGLOBAL16 handle
)
740 TRACE("%04x\n", handle
);
741 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
746 /***********************************************************************
747 * GlobalLRUNewest (KERNEL.164)
749 HGLOBAL16 WINAPI
GlobalLRUNewest16( HGLOBAL16 handle
)
751 TRACE("%04x\n", handle
);
752 if (handle
== (HGLOBAL16
)-1) handle
= CURRENT_DS
;
757 /***********************************************************************
758 * GetFreeSpace (KERNEL.169)
760 DWORD WINAPI
GetFreeSpace16( UINT16 wFlags
)
763 GlobalMemoryStatus( &ms
);
764 return ms
.dwAvailVirtual
;
767 /***********************************************************************
768 * GlobalDOSAlloc (KERNEL.184)
770 * Address (HW=Paragraph segment; LW=Selector)
772 DWORD WINAPI
GlobalDOSAlloc16(
773 DWORD size
/* [in] Number of bytes to be allocated */
776 LPVOID lpBlock
= DOSMEM_AllocBlock( size
, &uParagraph
);
780 HMODULE16 hModule
= GetModuleHandle16("KERNEL");
784 wSelector
= GLOBAL_CreateBlock(GMEM_FIXED
, lpBlock
, size
, hModule
, WINE_LDT_FLAGS_DATA
);
785 pArena
= GET_ARENA_PTR(wSelector
);
786 pArena
->flags
|= GA_DOSMEM
;
787 return MAKELONG(wSelector
,uParagraph
);
793 /***********************************************************************
794 * GlobalDOSFree (KERNEL.185)
799 WORD WINAPI
GlobalDOSFree16(
800 WORD sel
/* [in] Selector */
802 DWORD block
= GetSelectorBase(sel
);
804 if( block
&& block
< 0x100000 )
806 LPVOID lpBlock
= DOSMEM_MapDosToLinear( block
);
807 if( DOSMEM_FreeBlock( lpBlock
) )
808 GLOBAL_FreeBlock( sel
);
815 /***********************************************************************
816 * GlobalPageLock (KERNEL.191)
817 * GlobalSmartPageLock(KERNEL.230)
819 WORD WINAPI
GlobalPageLock16( HGLOBAL16 handle
)
821 TRACE("%04x\n", handle
);
822 if (!VALID_HANDLE(handle
)) {
823 WARN("Invalid handle 0x%04x passed to GlobalPageLock!\n",handle
);
826 return ++(GET_ARENA_PTR(handle
)->pageLockCount
);
830 /***********************************************************************
831 * GlobalPageUnlock (KERNEL.192)
832 * GlobalSmartPageUnlock(KERNEL.231)
834 WORD WINAPI
GlobalPageUnlock16( HGLOBAL16 handle
)
836 TRACE("%04x\n", handle
);
837 if (!VALID_HANDLE(handle
)) {
838 WARN("Invalid handle 0x%04x passed to GlobalPageUnlock!\n",handle
);
841 return --(GET_ARENA_PTR(handle
)->pageLockCount
);
845 /***********************************************************************
846 * GlobalFix (KERNEL.197)
847 * GlobalFix16 (KERNEL32.27)
849 WORD WINAPI
GlobalFix16( HGLOBAL16 handle
)
851 TRACE("%04x\n", handle
);
852 if (!VALID_HANDLE(handle
)) {
853 WARN("Invalid handle 0x%04x passed to GlobalFix16!\n",handle
);
856 GET_ARENA_PTR(handle
)->lockCount
++;
858 return GlobalHandleToSel16(handle
);
862 /***********************************************************************
863 * GlobalUnfix (KERNEL.198)
864 * GlobalUnfix16 (KERNEL32.28)
866 void WINAPI
GlobalUnfix16( HGLOBAL16 handle
)
868 TRACE("%04x\n", handle
);
869 if (!VALID_HANDLE(handle
)) {
870 WARN("Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle
);
873 GET_ARENA_PTR(handle
)->lockCount
--;
877 /***********************************************************************
878 * FarSetOwner (KERNEL.403)
880 void WINAPI
FarSetOwner16( HGLOBAL16 handle
, HANDLE16 hOwner
)
882 if (!VALID_HANDLE(handle
)) {
883 WARN("Invalid handle 0x%04x passed to FarSetOwner!\n",handle
);
886 GET_ARENA_PTR(handle
)->hOwner
= hOwner
;
890 /***********************************************************************
891 * FarGetOwner (KERNEL.404)
893 HANDLE16 WINAPI
FarGetOwner16( HGLOBAL16 handle
)
895 if (!VALID_HANDLE(handle
)) {
896 WARN("Invalid handle 0x%04x passed to FarGetOwner!\n",handle
);
899 return GET_ARENA_PTR(handle
)->hOwner
;
903 /***********************************************************************
904 * GlobalHandleToSel (TOOLHELP.50)
906 WORD WINAPI
GlobalHandleToSel16( HGLOBAL16 handle
)
908 if (!handle
) return 0;
909 if (!VALID_HANDLE(handle
)) {
910 WARN("Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle
);
915 WARN("Program attempted invalid selector conversion\n" );
922 /***********************************************************************
923 * GlobalFirst (TOOLHELP.51)
925 BOOL16 WINAPI
GlobalFirst16( GLOBALENTRY
*pGlobal
, WORD wFlags
)
927 if (wFlags
== GLOBAL_LRU
) return FALSE
;
929 return GlobalNext16( pGlobal
, wFlags
);
933 /***********************************************************************
934 * GlobalNext (TOOLHELP.52)
936 BOOL16 WINAPI
GlobalNext16( GLOBALENTRY
*pGlobal
, WORD wFlags
)
940 if (pGlobal
->dwNext
>= globalArenaSize
) return FALSE
;
941 pArena
= pGlobalArena
+ pGlobal
->dwNext
;
942 if (wFlags
== GLOBAL_FREE
) /* only free blocks */
945 for (i
= pGlobal
->dwNext
; i
< globalArenaSize
; i
++, pArena
++)
946 if (pArena
->size
== 0) break; /* block is free */
947 if (i
>= globalArenaSize
) return FALSE
;
951 pGlobal
->dwAddress
= pArena
->base
;
952 pGlobal
->dwBlockSize
= pArena
->size
;
953 pGlobal
->hBlock
= pArena
->handle
;
954 pGlobal
->wcLock
= pArena
->lockCount
;
955 pGlobal
->wcPageLock
= pArena
->pageLockCount
;
956 pGlobal
->wFlags
= (GetCurrentPDB16() == pArena
->hOwner
);
957 pGlobal
->wHeapPresent
= FALSE
;
958 pGlobal
->hOwner
= pArena
->hOwner
;
959 pGlobal
->wType
= GT_UNKNOWN
;
966 /***********************************************************************
967 * GlobalInfo (TOOLHELP.53)
969 BOOL16 WINAPI
GlobalInfo16( GLOBALINFO
*pInfo
)
974 pInfo
->wcItems
= globalArenaSize
;
975 pInfo
->wcItemsFree
= 0;
976 pInfo
->wcItemsLRU
= 0;
977 for (i
= 0, pArena
= pGlobalArena
; i
< globalArenaSize
; i
++, pArena
++)
978 if (pArena
->size
== 0) pInfo
->wcItemsFree
++;
983 /***********************************************************************
984 * GlobalEntryHandle (TOOLHELP.54)
986 BOOL16 WINAPI
GlobalEntryHandle16( GLOBALENTRY
*pGlobal
, HGLOBAL16 hItem
)
988 GLOBALARENA
*pArena
= GET_ARENA_PTR(hItem
);
990 pGlobal
->dwAddress
= pArena
->base
;
991 pGlobal
->dwBlockSize
= pArena
->size
;
992 pGlobal
->hBlock
= pArena
->handle
;
993 pGlobal
->wcLock
= pArena
->lockCount
;
994 pGlobal
->wcPageLock
= pArena
->pageLockCount
;
995 pGlobal
->wFlags
= (GetCurrentPDB16() == pArena
->hOwner
);
996 pGlobal
->wHeapPresent
= FALSE
;
997 pGlobal
->hOwner
= pArena
->hOwner
;
998 pGlobal
->wType
= GT_UNKNOWN
;
1005 /***********************************************************************
1006 * GlobalEntryModule (TOOLHELP.55)
1008 BOOL16 WINAPI
GlobalEntryModule16( GLOBALENTRY
*pGlobal
, HMODULE16 hModule
,
1011 FIXME("(%p, 0x%04x, 0x%04x), stub.\n", pGlobal
, hModule
, wSeg
);
1016 /***********************************************************************
1017 * MemManInfo (TOOLHELP.72)
1019 BOOL16 WINAPI
MemManInfo16( MEMMANINFO
*info
)
1021 MEMORYSTATUS status
;
1024 * Not unsurprisingly although the documention says you
1025 * _must_ provide the size in the dwSize field, this function
1026 * (under Windows) always fills the structure and returns true.
1028 GlobalMemoryStatus( &status
);
1029 info
->wPageSize
= getpagesize();
1030 info
->dwLargestFreeBlock
= status
.dwAvailVirtual
;
1031 info
->dwMaxPagesAvailable
= info
->dwLargestFreeBlock
/ info
->wPageSize
;
1032 info
->dwMaxPagesLockable
= info
->dwMaxPagesAvailable
;
1033 info
->dwTotalLinearSpace
= status
.dwTotalVirtual
/ info
->wPageSize
;
1034 info
->dwTotalUnlockedPages
= info
->dwTotalLinearSpace
;
1035 info
->dwFreePages
= info
->dwMaxPagesAvailable
;
1036 info
->dwTotalPages
= info
->dwTotalLinearSpace
;
1037 info
->dwFreeLinearSpace
= info
->dwMaxPagesAvailable
;
1038 info
->dwSwapFilePages
= status
.dwTotalPageFile
/ info
->wPageSize
;
1042 /***********************************************************************
1043 * GetFreeMemInfo (KERNEL.316)
1045 DWORD WINAPI
GetFreeMemInfo16(void)
1048 MemManInfo16( &info
);
1049 return MAKELONG( info
.dwTotalLinearSpace
, info
.dwMaxPagesAvailable
);
1052 /***********************************************************************
1053 * A20Proc (KERNEL.165)
1054 * A20_Proc (SYSTEM.20)
1056 void WINAPI
A20Proc16( WORD unused
)
1058 /* this is also a NOP in Windows */
1061 /***********************************************************************
1062 * LimitEMSPages (KERNEL.156)
1064 DWORD WINAPI
LimitEMSPages16( DWORD unused
)