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wine/memory/global.c
Huw D M Davies c43fdb75b3 GlobalReAlloc returns 0 on failure.
2000-04-13 15:57:06 +00:00

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/*
* Global heap functions
*
* Copyright 1995 Alexandre Julliard
*/
/* 0xffff sometimes seems to mean: CURRENT_DS */
#include <sys/types.h>
#include <stdlib.h>
#include <time.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include "wine/winbase16.h"
#include "global.h"
#include "heap.h"
#include "toolhelp.h"
#include "selectors.h"
#include "miscemu.h"
#include "stackframe.h"
#include "module.h"
#include "debugtools.h"
#include "winerror.h"
DEFAULT_DEBUG_CHANNEL(global);
/* Global arena block */
typedef struct
{
DWORD 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 */
/* Arena array */
static GLOBALARENA *pGlobalArena = NULL;
static int globalArenaSize = 0;
#define GLOBAL_MAX_ALLOC_SIZE 0x00ff0000 /* Largest allocation is 16M - 64K */
#define VALID_HANDLE(handle) (((handle)>>__AHSHIFT)<globalArenaSize)
#define GET_ARENA_PTR(handle) (pGlobalArena + ((handle) >> __AHSHIFT))
/***********************************************************************
* 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;
GLOBALARENA *pNewArena = realloc( pGlobalArena,
newsize * sizeof(GLOBALARENA) );
if (!pNewArena) return 0;
pGlobalArena = pNewArena;
memset( pGlobalArena + globalArenaSize, 0,
(newsize - globalArenaSize) * sizeof(GLOBALARENA) );
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, const void *ptr, DWORD size,
HGLOBAL16 hOwner, BOOL16 isCode,
BOOL16 is32Bit, BOOL16 isReadOnly,
SHMDATA *shmdata )
{
WORD sel, selcount;
GLOBALARENA *pArena;
/* Allocate the selector(s) */
sel = SELECTOR_AllocBlock( ptr, size,
isCode ? SEGMENT_CODE : SEGMENT_DATA,
is32Bit, isReadOnly );
if (!sel) return 0;
selcount = (size + 0xffff) / 0x10000;
if (!(pArena = GLOBAL_GetArena( sel, selcount )))
{
SELECTOR_FreeBlock( sel, selcount );
return 0;
}
/* Fill the arena block */
pArena->base = (DWORD)ptr;
pArena->size = GET_SEL_LIMIT(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 (!isCode) 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);
SELECTOR_FreeBlock( sel, (pArena->size + 0xffff) / 0x10000 );
memset( pArena, 0, sizeof(GLOBALARENA) );
return TRUE;
}
/***********************************************************************
* GLOBAL_MoveBlock
*/
BOOL16 GLOBAL_MoveBlock( HGLOBAL16 handle, const 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 = (DWORD)ptr;
pArena->size = size;
SELECTOR_MoveBlock( sel, ptr );
SetSelectorLimit16( sel, size-1 );
return TRUE;
}
/***********************************************************************
* GLOBAL_Alloc
*
* Implementation of GlobalAlloc16()
*/
HGLOBAL16 GLOBAL_Alloc( UINT16 flags, DWORD size, HGLOBAL16 hOwner,
BOOL16 isCode, BOOL16 is32Bit, BOOL16 isReadOnly )
{
void *ptr;
HGLOBAL16 handle;
SHMDATA shmdata;
TRACE("%ld flags=%04x\n", size, flags );
/* If size is 0, create a discarded block */
if (size == 0) return GLOBAL_CreateBlock( flags, NULL, 1, hOwner, isCode,
is32Bit, isReadOnly, NULL );
/* Fixup the size */
if (size >= GLOBAL_MAX_ALLOC_SIZE - 0x1f) return 0;
size = (size + 0x1f) & ~0x1f;
/* Allocate the linear memory */
ptr = HeapAlloc( GetProcessHeap(), 0, size );
/* FIXME: free discardable blocks and try again? */
if (!ptr) return 0;
/* Allocate the selector(s) */
handle = GLOBAL_CreateBlock( flags, ptr, size, hOwner,
isCode, is32Bit, isReadOnly, &shmdata);
if (!handle)
{
HeapFree( GetProcessHeap(), 0, ptr );
return 0;
}
if (flags & GMEM_ZEROINIT) memset( ptr, 0, size );
return handle;
}
/***********************************************************************
* GlobalAlloc16 (KERNEL.15)
* 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)
owner = GetExePtr(owner); /* Make it a module handle */
return GLOBAL_Alloc( flags, size, owner, FALSE, FALSE, FALSE );
}
/***********************************************************************
* GlobalReAlloc16 (KERNEL.16)
* 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;
GLOBALARENA *pArena, *pNewArena;
WORD sel = GlobalHandleToSel16( handle );
TRACE("%04x %ld 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;
HeapFree( GetProcessHeap(), 0, (void *)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 = (void *)pArena->base;
oldsize = pArena->size;
TRACE("oldsize %08lx\n",oldsize);
if (ptr && (size == oldsize)) return handle; /* Nothing to do */
if (((char *)ptr >= DOSMEM_MemoryBase(0)) &&
((char *)ptr <= DOSMEM_MemoryBase(0) + 0x100000))
ptr = DOSMEM_ResizeBlock(0, ptr, size, NULL);
else
ptr = HeapReAlloc( GetProcessHeap(), 0, ptr, size );
if (!ptr)
{
SELECTOR_FreeBlock( sel, (oldsize + 0xffff) / 0x10000 );
memset( pArena, 0, sizeof(GLOBALARENA) );
return 0;
}
/* Reallocate the selector(s) */
sel = SELECTOR_ReallocBlock( sel, ptr, size );
if (!sel)
{
HeapFree( GetProcessHeap(), 0, ptr );
memset( pArena, 0, sizeof(GLOBALARENA) );
return 0;
}
selcount = (size + 0xffff) / 0x10000;
if (!(pNewArena = GLOBAL_GetArena( sel, selcount )))
{
HeapFree( GetProcessHeap(), 0, ptr );
SELECTOR_FreeBlock( sel, selcount );
return 0;
}
/* Fill the new arena block */
if (pNewArena != pArena) memcpy( pNewArena, pArena, sizeof(GLOBALARENA) );
pNewArena->base = (DWORD)ptr;
pNewArena->size = GET_SEL_LIMIT(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;
}
/***********************************************************************
* GlobalFree16 (KERNEL.17)
* 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 = (void *)GET_ARENA_PTR(handle)->base;
TRACE("%04x\n", handle );
if (!GLOBAL_FreeBlock( handle )) return handle; /* failed */
if (ptr) HeapFree( GetProcessHeap(), 0, ptr );
return 0;
}
/***********************************************************************
* WIN16_GlobalLock16 (KERNEL.18)
*
* This is the GlobalLock16() function used by 16-bit code.
*/
SEGPTR WINAPI WIN16_GlobalLock16( HGLOBAL16 handle )
{
WORD sel = GlobalHandleToSel16( handle );
TRACE("(%04x) -> %08lx\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++;
}
CURRENT_STACK16->ecx = sel; /* selector must be returned in CX as well */
return PTR_SEG_OFF_TO_SEGPTR( sel, 0 );
}
/***********************************************************************
* GlobalLock16 (KERNEL.18)
*
* 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 (LPVOID)0;
GET_ARENA_PTR(handle)->lockCount++;
return (LPVOID)GET_ARENA_PTR(handle)->base;
}
/***********************************************************************
* GlobalUnlock16 (KERNEL.19)
* 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,
CONTEXT86 *context )
{
if ( delta == 1 )
GlobalLock16( handle );
else if ( delta == -1 )
GlobalUnlock16( handle );
else
ERR("(%04X, %d): strange delta value\n", handle, delta );
}
/***********************************************************************
* GlobalSize16 (KERNEL.20)
* 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;
}
/***********************************************************************
* GlobalHandle16 (KERNEL.21)
* 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;
}
/***********************************************************************
* GlobalFlags16 (KERNEL.22)
* 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);
}
/***********************************************************************
* LockSegment16 (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;
}
/***********************************************************************
* UnlockSegment16 (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...) */
}
/***********************************************************************
* GlobalCompact16 (KERNEL.25)
*/
DWORD WINAPI GlobalCompact16( DWORD desired )
{
return GLOBAL_MAX_ALLOC_SIZE;
}
/***********************************************************************
* GlobalFreeAll (KERNEL.26)
*/
void WINAPI GlobalFreeAll16( HGLOBAL16 owner )
{
DWORD i;
GLOBALARENA *pArena;
pArena = pGlobalArena;
for (i = 0; i < globalArenaSize; i++, pArena++)
{
if ((pArena->size != 0) && (pArena->hOwner == owner))
GlobalFree16( pArena->handle );
}
}
/***********************************************************************
* GlobalWire16 (KERNEL.111)
*/
SEGPTR WINAPI GlobalWire16( HGLOBAL16 handle )
{
return WIN16_GlobalLock16( handle );
}
/***********************************************************************
* GlobalUnWire16 (KERNEL.112)
*/
BOOL16 WINAPI GlobalUnWire16( HGLOBAL16 handle )
{
return !GlobalUnlock16( handle );
}
/***********************************************************************
* SetSwapAreaSize16 (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;
}
/***********************************************************************
* GetFreeSpace16 (KERNEL.169)
*/
DWORD WINAPI GetFreeSpace16( UINT16 wFlags )
{
MEMORYSTATUS ms;
GlobalMemoryStatus( &ms );
return ms.dwAvailVirtual;
}
/***********************************************************************
* GlobalDOSAlloc (KERNEL.184)
* RETURNS
* Address (HW=Paragraph segment; LW=Selector)
*/
DWORD WINAPI GlobalDOSAlloc16(
DWORD size /* [in] Number of bytes to be allocated */
) {
UINT16 uParagraph;
LPVOID lpBlock = DOSMEM_GetBlock( 0, size, &uParagraph );
if( lpBlock )
{
HMODULE16 hModule = GetModuleHandle16("KERNEL");
WORD wSelector;
wSelector = GLOBAL_CreateBlock(GMEM_FIXED, lpBlock, size,
hModule, 0, 0, 0, NULL );
return MAKELONG(wSelector,uParagraph);
}
return 0;
}
/***********************************************************************
* GlobalDOSFree (KERNEL.185)
* 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( 0, lpBlock ) )
GLOBAL_FreeBlock( sel );
sel = 0;
}
return sel;
}
/***********************************************************************
* GlobalPageLock (KERNEL.191)
*/
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)
*/
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);
}
/***********************************************************************
* GlobalFix16 (KERNEL.197)
*/
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);
}
/***********************************************************************
* GlobalUnfix16 (KERNEL.198)
*/
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;
}
/***********************************************************************
* GlobalHandleToSel (TOOLHELP.50)
*/
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;
}
/***********************************************************************
* GlobalFirst (TOOLHELP.51)
*/
BOOL16 WINAPI GlobalFirst16( GLOBALENTRY *pGlobal, WORD wFlags )
{
if (wFlags == GLOBAL_LRU) return FALSE;
pGlobal->dwNext = 0;
return GlobalNext16( pGlobal, wFlags );
}
/***********************************************************************
* GlobalNext (TOOLHELP.52)
*/
BOOL16 WINAPI GlobalNext16( GLOBALENTRY *pGlobal, WORD wFlags)
{
GLOBALARENA *pArena;
if (pGlobal->dwNext >= globalArenaSize) return FALSE;
pArena = pGlobalArena + pGlobal->dwNext;
if (wFlags == GLOBAL_FREE) /* only free blocks */
{
int i;
for (i = pGlobal->dwNext; i < globalArenaSize; i++, pArena++)
if (pArena->size == 0) break; /* block is free */
if (i >= globalArenaSize) return FALSE;
pGlobal->dwNext = i;
}
pGlobal->dwAddress = pArena->base;
pGlobal->dwBlockSize = pArena->size;
pGlobal->hBlock = pArena->handle;
pGlobal->wcLock = pArena->lockCount;
pGlobal->wcPageLock = pArena->pageLockCount;
pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
pGlobal->wHeapPresent = FALSE;
pGlobal->hOwner = pArena->hOwner;
pGlobal->wType = GT_UNKNOWN;
pGlobal->wData = 0;
pGlobal->dwNext++;
return TRUE;
}
/***********************************************************************
* GlobalInfo (TOOLHELP.53)
*/
BOOL16 WINAPI GlobalInfo16( GLOBALINFO *pInfo )
{
int i;
GLOBALARENA *pArena;
pInfo->wcItems = globalArenaSize;
pInfo->wcItemsFree = 0;
pInfo->wcItemsLRU = 0;
for (i = 0, pArena = pGlobalArena; i < globalArenaSize; i++, pArena++)
if (pArena->size == 0) pInfo->wcItemsFree++;
return TRUE;
}
/***********************************************************************
* GlobalEntryHandle (TOOLHELP.54)
*/
BOOL16 WINAPI GlobalEntryHandle16( GLOBALENTRY *pGlobal, HGLOBAL16 hItem )
{
GLOBALARENA *pArena = GET_ARENA_PTR(hItem);
pGlobal->dwAddress = pArena->base;
pGlobal->dwBlockSize = pArena->size;
pGlobal->hBlock = pArena->handle;
pGlobal->wcLock = pArena->lockCount;
pGlobal->wcPageLock = pArena->pageLockCount;
pGlobal->wFlags = (GetCurrentPDB16() == pArena->hOwner);
pGlobal->wHeapPresent = FALSE;
pGlobal->hOwner = pArena->hOwner;
pGlobal->wType = GT_UNKNOWN;
pGlobal->wData = 0;
pGlobal->dwNext++;
return TRUE;
}
/***********************************************************************
* GlobalEntryModule (TOOLHELP.55)
*/
BOOL16 WINAPI GlobalEntryModule16( GLOBALENTRY *pGlobal, HMODULE16 hModule,
WORD wSeg )
{
return FALSE;
}
/***********************************************************************
* MemManInfo (TOOLHELP.72)
*/
BOOL16 WINAPI MemManInfo16( MEMMANINFO *info )
{
MEMORYSTATUS status;
/*
* Not unsurprisingly although the documention says you
* _must_ provide the size in the dwSize field, this function
* (under Windows) always fills the structure and returns true.
*/
GlobalMemoryStatus( &status );
info->wPageSize = VIRTUAL_GetPageSize();
info->dwLargestFreeBlock = status.dwAvailVirtual;
info->dwMaxPagesAvailable = info->dwLargestFreeBlock / info->wPageSize;
info->dwMaxPagesLockable = info->dwMaxPagesAvailable;
info->dwTotalLinearSpace = status.dwTotalVirtual / info->wPageSize;
info->dwTotalUnlockedPages = info->dwTotalLinearSpace;
info->dwFreePages = info->dwMaxPagesAvailable;
info->dwTotalPages = info->dwTotalLinearSpace;
info->dwFreeLinearSpace = info->dwMaxPagesAvailable;
info->dwSwapFilePages = status.dwTotalPageFile / info->wPageSize;
return TRUE;
}
/***********************************************************************
* GetFreeMemInfo (KERNEL.316)
*/
DWORD WINAPI GetFreeMemInfo16(void)
{
MEMMANINFO info;
MemManInfo16( &info );
return MAKELONG( info.dwTotalLinearSpace, info.dwMaxPagesAvailable );
}
/*
* Win32 Global heap functions (GlobalXXX).
* These functions included in Win32 for compatibility with 16 bit Windows
* Especially the moveable blocks and handles are oldish.
* But the ability to directly allocate memory with GPTR and LPTR is widely
* used.
*
* The handle stuff looks horrible, but it's implemented almost like Win95
* does it.
*
*/
#define MAGIC_GLOBAL_USED 0x5342
#define GLOBAL_LOCK_MAX 0xFF
#define HANDLE_TO_INTERN(h) ((PGLOBAL32_INTERN)(((char *)(h))-2))
#define INTERN_TO_HANDLE(i) ((HGLOBAL) &((i)->Pointer))
#define POINTER_TO_HANDLE(p) (*(((HGLOBAL *)(p))-1))
#define ISHANDLE(h) (((DWORD)(h)&2)!=0)
#define ISPOINTER(h) (((DWORD)(h)&2)==0)
typedef struct __GLOBAL32_INTERN
{
WORD Magic;
LPVOID Pointer WINE_PACKED;
BYTE Flags;
BYTE LockCount;
} GLOBAL32_INTERN, *PGLOBAL32_INTERN;
/***********************************************************************
* GLOBAL_GetHeap
*
* Returns the appropriate heap to be used. If the object was created
* With GMEM_DDESHARE we allocated it on the system heap.
*/
static HANDLE GLOBAL_GetHeap( HGLOBAL hmem )
{
HANDLE heap;
TRACE("() hmem=%x\n", hmem);
/* Get the appropriate heap to be used for this object */
if (ISPOINTER(hmem))
heap = GetProcessHeap();
else
{
PGLOBAL32_INTERN pintern;
pintern=HANDLE_TO_INTERN(hmem);
/* If it was DDESHARE it was created on the shared system heap */
pintern=HANDLE_TO_INTERN(hmem);
heap = ( pintern->Flags & (GMEM_DDESHARE >> 8) )
? SystemHeap : GetProcessHeap();
}
return heap;
}
/***********************************************************************
* GlobalAlloc (KERNEL32.315)
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL WINAPI GlobalAlloc(
UINT flags, /* [in] Object allocation attributes */
DWORD size /* [in] Number of bytes to allocate */
) {
PGLOBAL32_INTERN pintern;
DWORD hpflags;
LPVOID palloc;
if(flags&GMEM_ZEROINIT)
hpflags=HEAP_ZERO_MEMORY;
else
hpflags=0;
TRACE("() flags=%04x\n", flags );
if((flags & GMEM_MOVEABLE)==0) /* POINTER */
{
palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
return (HGLOBAL) palloc;
}
else /* HANDLE */
{
HANDLE heap;
/* If DDESHARE is set, create on the shared system heap */
heap = (flags & GMEM_DDESHARE) ? SystemHeap : GetProcessHeap();
/* HeapLock(heap); */
pintern=HeapAlloc(heap, 0, sizeof(GLOBAL32_INTERN));
if(size)
{
palloc=HeapAlloc(heap, hpflags, size+sizeof(HGLOBAL));
*(HGLOBAL *)palloc=INTERN_TO_HANDLE(pintern);
pintern->Pointer=(char *) palloc+sizeof(HGLOBAL);
}
else
pintern->Pointer=NULL;
pintern->Magic=MAGIC_GLOBAL_USED;
pintern->Flags=flags>>8;
pintern->LockCount=0;
/* HeapUnlock(heap); */
return INTERN_TO_HANDLE(pintern);
}
}
/***********************************************************************
* GlobalLock (KERNEL32.326)
* RETURNS
* Pointer to first byte of block
* NULL: Failure
*/
LPVOID WINAPI GlobalLock(
HGLOBAL hmem /* [in] Handle of global memory object */
) {
PGLOBAL32_INTERN pintern;
LPVOID palloc;
if(ISPOINTER(hmem))
return (LPVOID) hmem;
/* HeapLock(GetProcessHeap()); */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
if(pintern->LockCount<GLOBAL_LOCK_MAX)
pintern->LockCount++;
palloc=pintern->Pointer;
}
else
{
WARN("invalid handle\n");
palloc=(LPVOID) NULL;
}
/* HeapUnlock(GetProcessHeap()); */;
return palloc;
}
/***********************************************************************
* GlobalUnlock (KERNEL32.332)
* RETURNS
* TRUE: Object is still locked
* FALSE: Object is unlocked
*/
BOOL WINAPI GlobalUnlock(
HGLOBAL hmem /* [in] Handle of global memory object */
) {
PGLOBAL32_INTERN pintern;
BOOL locked;
if(ISPOINTER(hmem))
return FALSE;
/* HeapLock(GetProcessHeap()); */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
if((pintern->LockCount<GLOBAL_LOCK_MAX)&&(pintern->LockCount>0))
pintern->LockCount--;
locked=(pintern->LockCount==0) ? FALSE : TRUE;
}
else
{
WARN("invalid handle\n");
locked=FALSE;
}
/* HeapUnlock(GetProcessHeap()); */
return locked;
}
/***********************************************************************
* GlobalHandle (KERNEL32.325)
* Returns the handle associated with the specified pointer.
*
* NOTES
* Since there in only one goto, can it be removed and the return
* be put 'inline'?
*
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL WINAPI GlobalHandle(
LPCVOID pmem /* [in] Pointer to global memory block */
) {
HGLOBAL handle;
HANDLE heap;
PGLOBAL32_INTERN maybe_intern;
LPCVOID test;
if (!pmem)
{
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
/* note that if pmem is a pointer to a a block allocated by */
/* GlobalAlloc with GMEM_MOVEABLE then magic test in HeapValidate */
/* will fail. */
if (ISPOINTER(pmem)) {
heap = GLOBAL_GetHeap( (HGLOBAL)pmem );
if (HeapValidate( heap, 0, pmem ))
return (HGLOBAL)pmem; /* valid fixed block */
handle = POINTER_TO_HANDLE(pmem);
} else
handle = (HGLOBAL)pmem;
/* Now test handle either passed in or retrieved from pointer */
heap = GLOBAL_GetHeap( handle );
maybe_intern = HANDLE_TO_INTERN( handle );
if (maybe_intern->Magic == MAGIC_GLOBAL_USED) {
test = maybe_intern->Pointer;
if (HeapValidate( heap, 0, ((HGLOBAL *)test)-1 ) &&
/* obj(-handle) valid arena? */
HeapValidate( heap, 0, maybe_intern )) /* intern valid arena? */
return handle; /* valid moveable block */
}
SetLastError( ERROR_INVALID_HANDLE );
return 0;
}
/***********************************************************************
* GlobalReAlloc (KERNEL32.328)
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL WINAPI GlobalReAlloc(
HGLOBAL hmem, /* [in] Handle of global memory object */
DWORD size, /* [in] New size of block */
UINT flags /* [in] How to reallocate object */
) {
LPVOID palloc;
HGLOBAL hnew;
PGLOBAL32_INTERN pintern;
HANDLE heap = GLOBAL_GetHeap( hmem );
DWORD heap_flags = (flags & GMEM_ZEROINIT) ? HEAP_ZERO_MEMORY : 0;
hnew = 0;
/* HeapLock(heap); */
if(flags & GMEM_MODIFY) /* modify flags */
{
if( ISPOINTER(hmem) && (flags & GMEM_MOVEABLE))
{
/* make a fixed block moveable
* actually only NT is able to do this. But it's soo simple
*/
if (hmem == 0)
{
ERR("GlobalReAlloc32 with null handle!\n");
SetLastError( ERROR_NOACCESS );
return 0;
}
size=HeapSize(heap, 0, (LPVOID) hmem);
hnew=GlobalAlloc( flags, size);
palloc=GlobalLock(hnew);
memcpy(palloc, (LPVOID) hmem, size);
GlobalUnlock(hnew);
GlobalFree(hmem);
}
else if( ISPOINTER(hmem) &&(flags & GMEM_DISCARDABLE))
{
/* change the flags to make our block "discardable" */
pintern=HANDLE_TO_INTERN(hmem);
pintern->Flags = pintern->Flags | (GMEM_DISCARDABLE >> 8);
hnew=hmem;
}
else
{
SetLastError(ERROR_INVALID_PARAMETER);
hnew = 0;
}
}
else
{
if(ISPOINTER(hmem))
{
/* reallocate fixed memory */
hnew=(HGLOBAL)HeapReAlloc(heap, heap_flags, (LPVOID) hmem, size);
}
else
{
/* reallocate a moveable block */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->LockCount>1) {
ERR("handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
SetLastError(ERROR_INVALID_HANDLE);
} else if(size!=0)
{
hnew=hmem;
if(pintern->Pointer)
{
if((palloc = HeapReAlloc(heap, heap_flags,
(char *) pintern->Pointer-sizeof(HGLOBAL),
size+sizeof(HGLOBAL))) == NULL)
return 0; /* Block still valid */
pintern->Pointer=(char *) palloc+sizeof(HGLOBAL);
}
else
{
if((palloc=HeapAlloc(heap, heap_flags, size+sizeof(HGLOBAL)))
== NULL)
return 0;
*(HGLOBAL *)palloc=hmem;
pintern->Pointer=(char *) palloc+sizeof(HGLOBAL);
}
}
else
{
if(pintern->Pointer)
{
HeapFree(heap, 0, (char *) pintern->Pointer-sizeof(HGLOBAL));
pintern->Pointer=NULL;
}
}
}
}
/* HeapUnlock(heap); */
return hnew;
}
/***********************************************************************
* GlobalFree (KERNEL32.322)
* RETURNS
* NULL: Success
* Handle: Failure
*/
HGLOBAL WINAPI GlobalFree(
HGLOBAL hmem /* [in] Handle of global memory object */
) {
PGLOBAL32_INTERN pintern;
HGLOBAL hreturned = 0;
HANDLE heap = GLOBAL_GetHeap( hmem );
if(ISPOINTER(hmem)) /* POINTER */
{
if(!HeapFree(heap, 0, (LPVOID) hmem)) hmem = 0;
}
else /* HANDLE */
{
/* HeapLock(heap); */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
/* WIN98 does not make this test. That is you can free a */
/* block you have not unlocked. Go figure!! */
/* if(pintern->LockCount!=0) */
/* SetLastError(ERROR_INVALID_HANDLE); */
if(pintern->Pointer)
if(!HeapFree(heap, 0,
(char *)(pintern->Pointer)-sizeof(HGLOBAL)))
hreturned=hmem;
if(!HeapFree(heap, 0, pintern))
hreturned=hmem;
}
/* HeapUnlock(heap); */
}
return hreturned;
}
/***********************************************************************
* GlobalSize (KERNEL32.329)
* RETURNS
* Size in bytes of the global memory object
* 0: Failure
*/
DWORD WINAPI GlobalSize(
HGLOBAL hmem /* [in] Handle of global memory object */
) {
DWORD retval;
PGLOBAL32_INTERN pintern;
HANDLE heap = GLOBAL_GetHeap( hmem );
if(ISPOINTER(hmem))
{
retval=HeapSize(heap, 0, (LPVOID) hmem);
}
else
{
/* HeapLock(heap); */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
if (!pintern->Pointer) /* handle case of GlobalAlloc( ??,0) */
return 0;
retval=HeapSize(heap, 0,
(char *)(pintern->Pointer)-sizeof(HGLOBAL))-4;
if (retval == 0xffffffff-4) retval = 0;
}
else
{
WARN("invalid handle\n");
retval=0;
}
/* HeapUnlock(heap); */
}
/* HeapSize returns 0xffffffff on failure */
if (retval == 0xffffffff) retval = 0;
return retval;
}
/***********************************************************************
* GlobalWire (KERNEL32.333)
*/
LPVOID WINAPI GlobalWire(HGLOBAL hmem)
{
return GlobalLock( hmem );
}
/***********************************************************************
* GlobalUnWire (KERNEL32.330)
*/
BOOL WINAPI GlobalUnWire(HGLOBAL hmem)
{
return GlobalUnlock( hmem);
}
/***********************************************************************
* GlobalFix (KERNEL32.320)
*/
VOID WINAPI GlobalFix(HGLOBAL hmem)
{
GlobalLock( hmem );
}
/***********************************************************************
* GlobalUnfix (KERNEL32.331)
*/
VOID WINAPI GlobalUnfix(HGLOBAL hmem)
{
GlobalUnlock( hmem);
}
/***********************************************************************
* GlobalFlags (KERNEL32.321)
* Returns information about the specified global memory object
*
* NOTES
* Should this return GMEM_INVALID_HANDLE on invalid handle?
*
* RETURNS
* Value specifying allocation flags and lock count
* GMEM_INVALID_HANDLE: Failure
*/
UINT WINAPI GlobalFlags(
HGLOBAL hmem /* [in] Handle to global memory object */
) {
DWORD retval;
PGLOBAL32_INTERN pintern;
if(ISPOINTER(hmem))
{
retval=0;
}
else
{
/* HeapLock(GetProcessHeap()); */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
retval=pintern->LockCount + (pintern->Flags<<8);
if(pintern->Pointer==0)
retval|= GMEM_DISCARDED;
}
else
{
WARN("Invalid handle: %04x", hmem);
retval=0;
}
/* HeapUnlock(GetProcessHeap()); */
}
return retval;
}
/***********************************************************************
* GlobalCompact (KERNEL32.316)
*/
DWORD WINAPI GlobalCompact( DWORD minfree )
{
return 0; /* GlobalCompact does nothing in Win32 */
}
/***********************************************************************
* GlobalMemoryStatus (KERNEL32.327)
* RETURNS
* None
*/
VOID WINAPI GlobalMemoryStatus(
LPMEMORYSTATUS lpmem
) {
static MEMORYSTATUS cached_memstatus;
static int cache_lastchecked = 0;
#ifdef linux
FILE *f;
#endif
if (time(NULL)==cache_lastchecked) {
memcpy(lpmem,&cached_memstatus,sizeof(MEMORYSTATUS));
return;
}
cache_lastchecked = time(NULL);
#ifdef linux
f = fopen( "/proc/meminfo", "r" );
if (f)
{
char buffer[256];
int total, used, free, shared, buffers, cached;
lpmem->dwLength = sizeof(MEMORYSTATUS);
lpmem->dwTotalPhys = lpmem->dwAvailPhys = 0;
lpmem->dwTotalPageFile = lpmem->dwAvailPageFile = 0;
while (fgets( buffer, sizeof(buffer), f ))
{
/* old style /proc/meminfo ... */
if (sscanf( buffer, "Mem: %d %d %d %d %d %d", &total, &used, &free, &shared, &buffers, &cached ))
{
lpmem->dwTotalPhys += total;
lpmem->dwAvailPhys += free + buffers + cached;
}
if (sscanf( buffer, "Swap: %d %d %d", &total, &used, &free ))
{
lpmem->dwTotalPageFile += total;
lpmem->dwAvailPageFile += free;
}
/* new style /proc/meminfo ... */
if (sscanf(buffer, "MemTotal: %d", &total))
lpmem->dwTotalPhys = total*1024;
if (sscanf(buffer, "MemFree: %d", &free))
lpmem->dwAvailPhys = free*1024;
if (sscanf(buffer, "SwapTotal: %d", &total))
lpmem->dwTotalPageFile = total*1024;
if (sscanf(buffer, "SwapFree: %d", &free))
lpmem->dwAvailPageFile = free*1024;
if (sscanf(buffer, "Buffers: %d", &buffers))
lpmem->dwAvailPhys += buffers*1024;
if (sscanf(buffer, "Cached: %d", &cached))
lpmem->dwAvailPhys += cached*1024;
}
fclose( f );
if (lpmem->dwTotalPhys)
{
lpmem->dwTotalVirtual = lpmem->dwTotalPhys+lpmem->dwTotalPageFile;
lpmem->dwAvailVirtual = lpmem->dwAvailPhys+lpmem->dwAvailPageFile;
lpmem->dwMemoryLoad = (lpmem->dwTotalVirtual-lpmem->dwAvailVirtual)
/ (lpmem->dwTotalVirtual / 100);
}
} else
#endif
{
/* FIXME: should do something for other systems */
lpmem->dwMemoryLoad = 0;
lpmem->dwTotalPhys = 16*1024*1024;
lpmem->dwAvailPhys = 16*1024*1024;
lpmem->dwTotalPageFile = 16*1024*1024;
lpmem->dwAvailPageFile = 16*1024*1024;
lpmem->dwTotalVirtual = 32*1024*1024;
lpmem->dwAvailVirtual = 32*1024*1024;
}
memcpy(&cached_memstatus,lpmem,sizeof(MEMORYSTATUS));
}
/***********************************************************************
* A20Proc16 (KERNEL.165)
*/
void WINAPI A20Proc16( WORD unused )
{
/* this is also a NOP in Windows */
}
/***********************************************************************
* LimitEMSPages16 (KERNEL.156)
*/
DWORD WINAPI LimitEMSPages16( DWORD unused )
{
return 0;
}
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