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wine/dlls/krnl386.exe16/global.c
Marcus Meissner 5574b64ede krnl386.exe16: pSeg might be NULL (Coverity).
2011-06-27 13:28:42 -05:00

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/*
* Global heap functions
*
* Copyright 1995 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* 0xffff sometimes seems to mean: CURRENT_DS */
#include "config.h"
#include "wine/port.h"
#include <sys/types.h>
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_SYS_SYSCTL_H
#include <sys/sysctl.h>
#endif
#include "wine/winbase16.h"
#include "winternl.h"
#include "kernel16_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(global);
/* Global arena block */
typedef struct
{
void *base; /* Base address (0 if discarded) */
DWORD size; /* Size in bytes (0 indicates a free block) */
HGLOBAL16 handle; /* Handle for this block */
HGLOBAL16 hOwner; /* Owner of this block */
BYTE lockCount; /* Count of GlobalFix() calls */
BYTE pageLockCount; /* Count of GlobalPageLock() calls */
BYTE flags; /* Allocation flags */
BYTE selCount; /* Number of selectors allocated for this block */
} GLOBALARENA;
/* Flags definitions */
#define GA_MOVEABLE 0x02 /* same as GMEM_MOVEABLE */
#define GA_DGROUP 0x04
#define GA_DISCARDABLE 0x08
#define GA_IPCSHARE 0x10 /* same as GMEM_DDESHARE */
#define GA_DOSMEM 0x20
/* Arena array (FIXME) */
static GLOBALARENA *pGlobalArena;
static int globalArenaSize;
#define GLOBAL_MAX_ALLOC_SIZE 0x00ff0000 /* Largest allocation is 16M - 64K */
#define GLOBAL_MAX_COUNT 8192 /* Max number of allocated blocks */
#define VALID_HANDLE(handle) (((handle)>>__AHSHIFT)<globalArenaSize)
#define GET_ARENA_PTR(handle) (pGlobalArena + ((handle) >> __AHSHIFT))
static HANDLE get_win16_heap(void)
{
static HANDLE win16_heap;
/* we create global memory block with execute permission. The access can be limited
* for 16-bit code on selector level */
if (!win16_heap) win16_heap = HeapCreate(HEAP_CREATE_ENABLE_EXECUTE, 0, 0);
return win16_heap;
}
/***********************************************************************
* GLOBAL_GetArena
*
* Return the arena for a given selector, growing the arena array if needed.
*/
static GLOBALARENA *GLOBAL_GetArena( WORD sel, WORD selcount )
{
if (((sel >> __AHSHIFT) + selcount) > globalArenaSize)
{
int newsize = ((sel >> __AHSHIFT) + selcount + 0xff) & ~0xff;
if (!pGlobalArena)
{
pGlobalArena = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
GLOBAL_MAX_COUNT * sizeof(GLOBALARENA) );
if (!pGlobalArena) return 0;
/* Hack: store a pointer to it in THHOOK instead of a handle */
*(GLOBALARENA **)&pThhook->hGlobalHeap = pGlobalArena;
}
if (newsize > GLOBAL_MAX_COUNT) return 0;
globalArenaSize = newsize;
}
return pGlobalArena + (sel >> __AHSHIFT);
}
void debug_handles(void)
{
int printed=0;
int i;
for (i = globalArenaSize-1 ; i>=0 ; i--) {
if (pGlobalArena[i].size!=0 && (pGlobalArena[i].handle & 0x8000)){
printed=1;
DPRINTF("0x%08x, ",pGlobalArena[i].handle);
}
}
if (printed)
DPRINTF("\n");
}
/***********************************************************************
* GLOBAL_CreateBlock
*
* Create a global heap block for a fixed range of linear memory.
*/
HGLOBAL16 GLOBAL_CreateBlock( WORD flags, void *ptr, DWORD size,
HGLOBAL16 hOwner, unsigned char selflags )
{
WORD sel, selcount;
GLOBALARENA *pArena;
/* Allocate the selector(s) */
sel = SELECTOR_AllocBlock( ptr, size, selflags );
if (!sel) return 0;
selcount = (size + 0xffff) / 0x10000;
if (!(pArena = GLOBAL_GetArena( sel, selcount )))
{
SELECTOR_FreeBlock( sel );
return 0;
}
/* Fill the arena block */
pArena->base = ptr;
pArena->size = GetSelectorLimit16(sel) + 1;
pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
pArena->hOwner = hOwner;
pArena->lockCount = 0;
pArena->pageLockCount = 0;
pArena->flags = flags & GA_MOVEABLE;
if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
if (flags & GMEM_DDESHARE) pArena->flags |= GA_IPCSHARE;
if (!(selflags & (WINE_LDT_FLAGS_CODE^WINE_LDT_FLAGS_DATA))) pArena->flags |= GA_DGROUP;
pArena->selCount = selcount;
if (selcount > 1) /* clear the next arena blocks */
memset( pArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
return pArena->handle;
}
/***********************************************************************
* GLOBAL_FreeBlock
*
* Free a block allocated by GLOBAL_CreateBlock, without touching
* the associated linear memory range.
*/
BOOL16 GLOBAL_FreeBlock( HGLOBAL16 handle )
{
WORD sel;
GLOBALARENA *pArena;
if (!handle) return TRUE;
sel = GlobalHandleToSel16( handle );
if (!VALID_HANDLE(sel)) return FALSE;
pArena = GET_ARENA_PTR(sel);
if (!pArena->size)
{
WARN( "already free %x\n", handle );
return FALSE;
}
SELECTOR_FreeBlock( sel );
memset( pArena, 0, sizeof(GLOBALARENA) );
return TRUE;
}
/***********************************************************************
* GLOBAL_MoveBlock
*/
BOOL16 GLOBAL_MoveBlock( HGLOBAL16 handle, void *ptr, DWORD size )
{
WORD sel;
GLOBALARENA *pArena;
if (!handle) return TRUE;
sel = GlobalHandleToSel16( handle );
if (!VALID_HANDLE(sel)) return FALSE;
pArena = GET_ARENA_PTR(sel);
if (pArena->selCount != 1)
return FALSE;
pArena->base = ptr;
pArena->size = size;
SELECTOR_ReallocBlock( sel, ptr, size );
return TRUE;
}
/***********************************************************************
* GLOBAL_Alloc
*
* Implementation of GlobalAlloc16()
*/
HGLOBAL16 GLOBAL_Alloc( UINT16 flags, DWORD size, HGLOBAL16 hOwner, unsigned char selflags )
{
void *ptr;
HGLOBAL16 handle;
TRACE("%d flags=%04x\n", size, flags );
/* If size is 0, create a discarded block */
if (size == 0) return GLOBAL_CreateBlock( flags, NULL, 1, hOwner, selflags );
/* Fixup the size */
if (size >= GLOBAL_MAX_ALLOC_SIZE - 0x1f) return 0;
size = (size + 0x1f) & ~0x1f;
/* Allocate the linear memory */
ptr = HeapAlloc( get_win16_heap(), 0, size );
/* FIXME: free discardable blocks and try again? */
if (!ptr) return 0;
/* Allocate the selector(s) */
handle = GLOBAL_CreateBlock( flags, ptr, size, hOwner, selflags );
if (!handle)
{
HeapFree( get_win16_heap(), 0, ptr );
return 0;
}
if (flags & GMEM_ZEROINIT) memset( ptr, 0, size );
return handle;
}
/***********************************************************************
* GlobalAlloc (KERNEL.15)
* GlobalAlloc16 (KERNEL32.24)
*
* Allocate a global memory object.
*
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL16 WINAPI GlobalAlloc16(
UINT16 flags, /* [in] Object allocation attributes */
DWORD size /* [in] Number of bytes to allocate */
) {
HANDLE16 owner = GetCurrentPDB16();
if (flags & GMEM_DDESHARE)
{
/* make it owned by the calling module */
STACK16FRAME *frame = CURRENT_STACK16;
owner = GetExePtr( frame->cs );
}
return GLOBAL_Alloc( flags, size, owner, WINE_LDT_FLAGS_DATA );
}
/***********************************************************************
* GlobalReAlloc (KERNEL.16)
*
* Change the size or attributes of a global memory object.
*
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL16 WINAPI GlobalReAlloc16(
HGLOBAL16 handle, /* [in] Handle of global memory object */
DWORD size, /* [in] New size of block */
UINT16 flags /* [in] How to reallocate object */
) {
WORD selcount;
DWORD oldsize;
void *ptr, *newptr;
GLOBALARENA *pArena, *pNewArena;
WORD sel = GlobalHandleToSel16( handle );
HANDLE heap = get_win16_heap();
TRACE("%04x %d flags=%04x\n",
handle, size, flags );
if (!handle) return 0;
if (!VALID_HANDLE(handle))
{
WARN("Invalid handle 0x%04x!\n", handle);
return 0;
}
pArena = GET_ARENA_PTR( handle );
/* Discard the block if requested */
if ((size == 0) && (flags & GMEM_MOVEABLE) && !(flags & GMEM_MODIFY))
{
if (!(pArena->flags & GA_MOVEABLE) ||
!(pArena->flags & GA_DISCARDABLE) ||
(pArena->lockCount > 0) || (pArena->pageLockCount > 0)) return 0;
if (pArena->flags & GA_DOSMEM)
DOSMEM_FreeBlock( pArena->base );
else
HeapFree( heap, 0, pArena->base );
pArena->base = 0;
/* Note: we rely on the fact that SELECTOR_ReallocBlock won't
* change the selector if we are shrinking the block.
* FIXME: shouldn't we keep selectors until the block is deleted?
*/
SELECTOR_ReallocBlock( sel, 0, 1 );
return handle;
}
/* Fixup the size */
if (size > GLOBAL_MAX_ALLOC_SIZE - 0x20) return 0;
if (size == 0) size = 0x20;
else size = (size + 0x1f) & ~0x1f;
/* Change the flags */
if (flags & GMEM_MODIFY)
{
/* Change the flags, leaving GA_DGROUP alone */
pArena->flags = (pArena->flags & GA_DGROUP) | (flags & GA_MOVEABLE);
if (flags & GMEM_DISCARDABLE) pArena->flags |= GA_DISCARDABLE;
return handle;
}
/* Reallocate the linear memory */
ptr = pArena->base;
oldsize = pArena->size;
TRACE("oldbase %p oldsize %08x newsize %08x\n", ptr,oldsize,size);
if (ptr && (size == oldsize)) return handle; /* Nothing to do */
if (pArena->flags & GA_DOSMEM)
{
if (DOSMEM_ResizeBlock(ptr, size, TRUE) == size)
newptr = ptr;
else if(pArena->pageLockCount > 0)
newptr = 0;
else
{
newptr = DOSMEM_AllocBlock( size, NULL );
if (newptr)
{
memcpy( newptr, ptr, oldsize );
DOSMEM_FreeBlock( ptr );
}
}
}
else
{
/*
* if more than one reader (e.g. some pointer has been
* given out by GetVDMPointer32W16),
* only try to realloc in place
*/
if (ptr)
newptr = HeapReAlloc( heap,
(pArena->pageLockCount > 0) ? HEAP_REALLOC_IN_PLACE_ONLY : 0,
ptr, size );
else
newptr = HeapAlloc( heap, 0, size );
}
if (!newptr)
{
FIXME("Realloc failed lock %d\n",pArena->pageLockCount);
if (pArena->pageLockCount <1)
{
if (pArena->flags & GA_DOSMEM)
DOSMEM_FreeBlock( pArena->base );
else
HeapFree( heap, 0, ptr );
SELECTOR_FreeBlock( sel );
memset( pArena, 0, sizeof(GLOBALARENA) );
}
return 0;
}
ptr = newptr;
/* Reallocate the selector(s) */
sel = SELECTOR_ReallocBlock( sel, ptr, size );
if (!sel)
{
if (pArena->flags & GA_DOSMEM)
DOSMEM_FreeBlock( pArena->base );
else
HeapFree( heap, 0, ptr );
memset( pArena, 0, sizeof(GLOBALARENA) );
return 0;
}
selcount = (size + 0xffff) / 0x10000;
if (!(pNewArena = GLOBAL_GetArena( sel, selcount )))
{
if (pArena->flags & GA_DOSMEM)
DOSMEM_FreeBlock( pArena->base );
else
HeapFree( heap, 0, ptr );
SELECTOR_FreeBlock( sel );
return 0;
}
/* Fill the new arena block
As we may have used HEAP_REALLOC_IN_PLACE_ONLY, areas may overlap*/
if (pNewArena != pArena) memmove( pNewArena, pArena, sizeof(GLOBALARENA) );
pNewArena->base = ptr;
pNewArena->size = GetSelectorLimit16(sel) + 1;
pNewArena->selCount = selcount;
pNewArena->handle = (pNewArena->flags & GA_MOVEABLE) ? sel - 1 : sel;
if (selcount > 1) /* clear the next arena blocks */
memset( pNewArena + 1, 0, (selcount - 1) * sizeof(GLOBALARENA) );
if ((oldsize < size) && (flags & GMEM_ZEROINIT))
memset( (char *)ptr + oldsize, 0, size - oldsize );
return pNewArena->handle;
}
/***********************************************************************
* GlobalFree (KERNEL.17)
* GlobalFree16 (KERNEL32.31)
* RETURNS
* NULL: Success
* Handle: Failure
*/
HGLOBAL16 WINAPI GlobalFree16(
HGLOBAL16 handle /* [in] Handle of global memory object */
) {
void *ptr;
if (!VALID_HANDLE(handle))
{
WARN("Invalid handle 0x%04x passed to GlobalFree16!\n",handle);
return 0;
}
ptr = GET_ARENA_PTR(handle)->base;
TRACE("%04x\n", handle );
if (!GLOBAL_FreeBlock( handle )) return handle; /* failed */
HeapFree( get_win16_heap(), 0, ptr );
return 0;
}
/**********************************************************************
* K32WOWGlobalLock16 (KERNEL32.60)
*/
SEGPTR WINAPI K32WOWGlobalLock16( HGLOBAL16 handle )
{
WORD sel = GlobalHandleToSel16( handle );
TRACE("(%04x) -> %08x\n", handle, MAKELONG( 0, sel ) );
if (handle)
{
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle);
sel = 0;
}
else if (!GET_ARENA_PTR(handle)->base)
sel = 0;
else
GET_ARENA_PTR(handle)->lockCount++;
}
return MAKESEGPTR( sel, 0 );
}
/***********************************************************************
* GlobalLock (KERNEL.18)
*
* This is the GlobalLock16() function used by 16-bit code.
*/
SEGPTR WINAPI WIN16_GlobalLock16( HGLOBAL16 handle )
{
SEGPTR ret = K32WOWGlobalLock16( handle );
CURRENT_STACK16->ecx = SELECTOROF(ret); /* selector must be returned in CX as well */
return ret;
}
/***********************************************************************
* GlobalLock16 (KERNEL32.25)
*
* This is the GlobalLock16() function used by 32-bit code.
*
* RETURNS
* Pointer to first byte of memory block
* NULL: Failure
*/
LPVOID WINAPI GlobalLock16(
HGLOBAL16 handle /* [in] Handle of global memory object */
) {
if (!handle) return 0;
if (!VALID_HANDLE(handle))
return 0;
GET_ARENA_PTR(handle)->lockCount++;
return GET_ARENA_PTR(handle)->base;
}
/***********************************************************************
* GlobalUnlock (KERNEL.19)
* GlobalUnlock16 (KERNEL32.26)
* NOTES
* Should the return values be cast to booleans?
*
* RETURNS
* TRUE: Object is still locked
* FALSE: Object is unlocked
*/
BOOL16 WINAPI GlobalUnlock16(
HGLOBAL16 handle /* [in] Handle of global memory object */
) {
GLOBALARENA *pArena = GET_ARENA_PTR(handle);
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle);
return 0;
}
TRACE("%04x\n", handle );
if (pArena->lockCount) pArena->lockCount--;
return pArena->lockCount;
}
/***********************************************************************
* GlobalChangeLockCount (KERNEL.365)
*
* This is declared as a register function as it has to preserve
* *all* registers, even AX/DX !
*
*/
void WINAPI GlobalChangeLockCount16( HGLOBAL16 handle, INT16 delta, CONTEXT *context )
{
if ( delta == 1 )
GlobalLock16( handle );
else if ( delta == -1 )
GlobalUnlock16( handle );
else
ERR("(%04X, %d): strange delta value\n", handle, delta );
}
/***********************************************************************
* GlobalSize (KERNEL.20)
* GlobalSize16 (KERNEL32.32)
*
* Get the current size of a global memory object.
*
* RETURNS
* Size in bytes of object
* 0: Failure
*/
DWORD WINAPI GlobalSize16(
HGLOBAL16 handle /* [in] Handle of global memory object */
) {
TRACE("%04x\n", handle );
if (!handle) return 0;
if (!VALID_HANDLE(handle))
return 0;
return GET_ARENA_PTR(handle)->size;
}
/***********************************************************************
* GlobalHandle (KERNEL.21)
*
* Get the handle associated with a pointer to the global memory block.
*
* NOTES
* Why is GlobalHandleToSel used here with the sel as input?
*
* RETURNS
* Handle: Success
* NULL: Failure
*/
DWORD WINAPI GlobalHandle16(
WORD sel /* [in] Address of global memory block */
) {
TRACE("%04x\n", sel );
if (!VALID_HANDLE(sel)) {
WARN("Invalid handle 0x%04x passed to GlobalHandle16!\n",sel);
return 0;
}
return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
}
/***********************************************************************
* GlobalHandleNoRIP (KERNEL.159)
*/
DWORD WINAPI GlobalHandleNoRIP16( WORD sel )
{
int i;
for (i = globalArenaSize-1 ; i>=0 ; i--) {
if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == sel)
return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel16(sel) );
}
return 0;
}
/***********************************************************************
* GlobalFlags (KERNEL.22)
*
* Get information about a global memory object.
*
* NOTES
* Should this return GMEM_INVALID_HANDLE instead of 0 on invalid
* handle?
*
* RETURNS
* Value specifying flags and lock count
* GMEM_INVALID_HANDLE: Invalid handle
*/
UINT16 WINAPI GlobalFlags16(
HGLOBAL16 handle /* [in] Handle of global memory object */
) {
GLOBALARENA *pArena;
TRACE("%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to GlobalFlags16!\n",handle);
return 0;
}
pArena = GET_ARENA_PTR(handle);
return pArena->lockCount |
((pArena->flags & GA_DISCARDABLE) ? GMEM_DISCARDABLE : 0) |
((pArena->base == 0) ? GMEM_DISCARDED : 0);
}
/***********************************************************************
* LockSegment (KERNEL.23)
*/
HGLOBAL16 WINAPI LockSegment16( HGLOBAL16 handle )
{
TRACE("%04x\n", handle );
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to LockSegment16!\n",handle);
return 0;
}
GET_ARENA_PTR(handle)->lockCount++;
return handle;
}
/***********************************************************************
* UnlockSegment (KERNEL.24)
*/
void WINAPI UnlockSegment16( HGLOBAL16 handle )
{
TRACE("%04x\n", handle );
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to UnlockSegment16!\n",handle);
return;
}
GET_ARENA_PTR(handle)->lockCount--;
/* FIXME: this ought to return the lock count in CX (go figure...) */
}
/***********************************************************************
* GlobalCompact (KERNEL.25)
*/
DWORD WINAPI GlobalCompact16( DWORD desired )
{
return GLOBAL_MAX_ALLOC_SIZE;
}
/***********************************************************************
* GlobalFreeAll (KERNEL.26)
*/
void WINAPI GlobalFreeAll16( HGLOBAL16 owner )
{
int i;
GLOBALARENA *pArena;
pArena = pGlobalArena;
for (i = 0; i < globalArenaSize; i++, pArena++)
{
if ((pArena->size != 0) && (pArena->hOwner == owner))
GlobalFree16( pArena->handle );
}
}
/***********************************************************************
* GlobalWire (KERNEL.111)
* GlobalWire16 (KERNEL32.29)
*/
SEGPTR WINAPI GlobalWire16( HGLOBAL16 handle )
{
return WIN16_GlobalLock16( handle );
}
/***********************************************************************
* GlobalUnWire (KERNEL.112)
* GlobalUnWire16 (KERNEL32.30)
*/
BOOL16 WINAPI GlobalUnWire16( HGLOBAL16 handle )
{
return !GlobalUnlock16( handle );
}
/***********************************************************************
* SetSwapAreaSize (KERNEL.106)
*/
LONG WINAPI SetSwapAreaSize16( WORD size )
{
FIXME("(%d) - stub!\n", size );
return MAKELONG( size, 0xffff );
}
/***********************************************************************
* GlobalLRUOldest (KERNEL.163)
*/
HGLOBAL16 WINAPI GlobalLRUOldest16( HGLOBAL16 handle )
{
TRACE("%04x\n", handle );
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
return handle;
}
/***********************************************************************
* GlobalLRUNewest (KERNEL.164)
*/
HGLOBAL16 WINAPI GlobalLRUNewest16( HGLOBAL16 handle )
{
TRACE("%04x\n", handle );
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
return handle;
}
/***********************************************************************
* GetFreeSpace (KERNEL.169)
*/
DWORD WINAPI GetFreeSpace16( UINT16 wFlags )
{
MEMORYSTATUS ms;
GlobalMemoryStatus( &ms );
return ms.dwAvailVirtual;
}
/***********************************************************************
* GlobalDOSAlloc (KERNEL.184)
*
* Allocate memory in the first MB.
*
* RETURNS
* Address (HW=Paragraph segment; LW=Selector)
*/
DWORD WINAPI GlobalDOSAlloc16(
DWORD size /* [in] Number of bytes to be allocated */
) {
UINT16 uParagraph;
LPVOID lpBlock = DOSMEM_AllocBlock( size, &uParagraph );
if( lpBlock )
{
HMODULE16 hModule = GetModuleHandle16("KERNEL");
WORD wSelector;
GLOBALARENA *pArena;
wSelector = GLOBAL_CreateBlock(GMEM_FIXED, lpBlock, size, hModule, WINE_LDT_FLAGS_DATA );
pArena = GET_ARENA_PTR(wSelector);
pArena->flags |= GA_DOSMEM;
return MAKELONG(wSelector,uParagraph);
}
return 0;
}
/***********************************************************************
* GlobalDOSFree (KERNEL.185)
*
* Free memory allocated with GlobalDOSAlloc
*
* RETURNS
* NULL: Success
* sel: Failure
*/
WORD WINAPI GlobalDOSFree16(
WORD sel /* [in] Selector */
) {
DWORD block = GetSelectorBase(sel);
if( block && block < 0x100000 )
{
LPVOID lpBlock = DOSMEM_MapDosToLinear( block );
if( DOSMEM_FreeBlock( lpBlock ) )
GLOBAL_FreeBlock( sel );
sel = 0;
}
return sel;
}
/***********************************************************************
* GlobalPageLock (KERNEL.191)
* GlobalSmartPageLock(KERNEL.230)
*/
WORD WINAPI GlobalPageLock16( HGLOBAL16 handle )
{
TRACE("%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to GlobalPageLock!\n",handle);
return 0;
}
return ++(GET_ARENA_PTR(handle)->pageLockCount);
}
/***********************************************************************
* GlobalPageUnlock (KERNEL.192)
* GlobalSmartPageUnlock(KERNEL.231)
*/
WORD WINAPI GlobalPageUnlock16( HGLOBAL16 handle )
{
TRACE("%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to GlobalPageUnlock!\n",handle);
return 0;
}
return --(GET_ARENA_PTR(handle)->pageLockCount);
}
/***********************************************************************
* GlobalFix (KERNEL.197)
* GlobalFix16 (KERNEL32.27)
*/
WORD WINAPI GlobalFix16( HGLOBAL16 handle )
{
TRACE("%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to GlobalFix16!\n",handle);
return 0;
}
GET_ARENA_PTR(handle)->lockCount++;
return GlobalHandleToSel16(handle);
}
/***********************************************************************
* GlobalUnfix (KERNEL.198)
* GlobalUnfix16 (KERNEL32.28)
*/
void WINAPI GlobalUnfix16( HGLOBAL16 handle )
{
TRACE("%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle);
return;
}
GET_ARENA_PTR(handle)->lockCount--;
}
/***********************************************************************
* FarSetOwner (KERNEL.403)
*/
void WINAPI FarSetOwner16( HGLOBAL16 handle, HANDLE16 hOwner )
{
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to FarSetOwner!\n",handle);
return;
}
GET_ARENA_PTR(handle)->hOwner = hOwner;
}
/***********************************************************************
* FarGetOwner (KERNEL.404)
*/
HANDLE16 WINAPI FarGetOwner16( HGLOBAL16 handle )
{
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
return 0;
}
return GET_ARENA_PTR(handle)->hOwner;
}
/************************************************************************
* GlobalMasterHandle (KERNEL.28)
*
*
* Should return selector and handle of the information structure for
* the global heap. selector and handle are stored in the THHOOK as
* pGlobalHeap and hGlobalHeap.
* As Wine doesn't have this structure, we return both values as zero
* Applications should interpret this as "No Global Heap"
*/
DWORD WINAPI GlobalMasterHandle16(void)
{
FIXME(": stub\n");
return 0;
}
/***********************************************************************
* GlobalHandleToSel (TOOLHELP.50)
*
* FIXME: This is in TOOLHELP but we keep a copy here for now.
*/
WORD WINAPI GlobalHandleToSel16( HGLOBAL16 handle )
{
if (!handle) return 0;
if (!VALID_HANDLE(handle)) {
WARN("Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle);
return 0;
}
if (!(handle & 7))
{
WARN("Program attempted invalid selector conversion\n" );
return handle - 1;
}
return handle | 7;
}
/***********************************************************************
* GetFreeMemInfo (KERNEL.316)
*/
DWORD WINAPI GetFreeMemInfo16(void)
{
MEMORYSTATUS status;
GlobalMemoryStatus( &status );
return MAKELONG( status.dwTotalVirtual/getpagesize(), status.dwAvailVirtual/getpagesize() );
}
/***********************************************************************
* A20Proc (KERNEL.165)
*/
void WINAPI A20Proc16( WORD unused )
{
/* this is also a NOP in Windows */
}
/***********************************************************************
* LimitEMSPages (KERNEL.156)
*/
DWORD WINAPI LimitEMSPages16( DWORD unused )
{
return 0;
}
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