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wine/memory/global.c

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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 <unistd.h>
#include <string.h>
#include "windows.h"
#include "global.h"
#include "heap.h"
#include "toolhelp.h"
#include "selectors.h"
#include "miscemu.h"
#include "dde_mem.h"
#include "stackframe.h"
#include "module.h"
#include "debug.h"
#include "winerror.h"
/* 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 */
#ifdef CONFIG_IPC
int shmid;
#endif
} 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()
{
int printed=0;
int i;
for (i = globalArenaSize-1 ; i>=0 ; i--) {
if (pGlobalArena[i].size!=0 && (pGlobalArena[i].handle & 0x8000)){
printed=1;
DUMP("0x%08x, ",pGlobalArena[i].handle);
}
}
if (printed)
DUMP("\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;
#ifdef CONFIG_IPC
if (flags & GMEM_DDESHARE)
{
pArena->handle = shmdata->handle;
pArena->shmid = shmdata->shmid;
shmdata->sel = sel;
}
else
{
pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
pArena->shmid = 0;
}
#else
pArena->handle = (flags & GMEM_MOVEABLE) ? sel - 1 : sel;
#endif
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 = GlobalHandleToSel( 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 = GlobalHandleToSel( 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 );
SetSelectorLimit( 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(global, "%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 */
#ifdef CONFIG_IPC
if (flags & GMEM_DDESHARE)
ptr = DDE_malloc(flags, size, &shmdata);
else
#endif /* CONFIG_IPC */
{
ptr = HeapAlloc( SystemHeap, 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( SystemHeap, 0, ptr );
return 0;
}
if (flags & GMEM_ZEROINIT) memset( ptr, 0, size );
return handle;
}
#ifdef CONFIG_IPC
/***********************************************************************
* GLOBAL_FindArena
*
* Find the arena for a given handle
* (when handle is not serial - e.g. DDE)
*/
static GLOBALARENA *GLOBAL_FindArena( HGLOBAL16 handle)
{
int i;
for (i = globalArenaSize-1 ; i>=0 ; i--) {
if (pGlobalArena[i].size!=0 && pGlobalArena[i].handle == handle)
return ( &pGlobalArena[i] );
}
return NULL;
}
/***********************************************************************
* DDE_GlobalHandleToSel
*/
WORD DDE_GlobalHandleToSel( HGLOBAL16 handle )
{
GLOBALARENA *pArena;
SEGPTR segptr;
pArena= GLOBAL_FindArena(handle);
if (pArena) {
int ArenaIdx = pArena - pGlobalArena;
/* See if synchronized to the shared memory */
return DDE_SyncHandle(handle, ( ArenaIdx << __AHSHIFT) | 7);
}
/* attach the block */
DDE_AttachHandle(handle, &segptr);
return SELECTOROF( segptr );
}
#endif /* CONFIG_IPC */
/***********************************************************************
* 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 = GetCurrentPDB();
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 = GlobalHandleToSel( handle );
TRACE(global, "%04x %ld flags=%04x\n",
handle, size, flags );
if (!handle) return 0;
#ifdef CONFIG_IPC
if (flags & GMEM_DDESHARE || is_dde_handle(handle))
{
FIXME(global, "shared memory reallocating unimplemented\n");
return 0;
}
#endif /* CONFIG_IPC */
if (!VALID_HANDLE(handle)) {
WARN(global, "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( SystemHeap, 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, SEGMENT_DATA, 0, 0 );
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(global,"oldsize %08lx\n",oldsize);
if (ptr && (size == oldsize)) return handle; /* Nothing to do */
ptr = HeapReAlloc( SystemHeap, 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, SEGMENT_DATA, 0, 0 );
if (!sel)
{
HeapFree( SystemHeap, 0, ptr );
memset( pArena, 0, sizeof(GLOBALARENA) );
return 0;
}
selcount = (size + 0xffff) / 0x10000;
if (!(pNewArena = GLOBAL_GetArena( sel, selcount )))
{
HeapFree( SystemHeap, 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(global,"Invalid handle 0x%04x passed to GlobalFree16!\n",handle);
return 0;
}
ptr = (void *)GET_ARENA_PTR(handle)->base;
TRACE(global, "%04x\n", handle );
if (!GLOBAL_FreeBlock( handle )) return handle; /* failed */
#ifdef CONFIG_IPC
if (is_dde_handle(handle)) return DDE_GlobalFree(handle);
#endif /* CONFIG_IPC */
if (ptr) HeapFree( SystemHeap, 0, ptr );
return 0;
}
/***********************************************************************
* WIN16_GlobalLock16 (KERNEL.18)
*
* This is the GlobalLock16() function used by 16-bit code.
*/
SEGPTR WINAPI WIN16_GlobalLock16( HGLOBAL16 handle )
{
TRACE(global, "(%04x) -> %08lx\n",
handle, MAKELONG( 0, GlobalHandleToSel(handle)) );
if (handle)
{
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
#ifdef CONFIG_IPC
if (is_dde_handle(handle))
return PTR_SEG_OFF_TO_SEGPTR( DDE_GlobalHandleToSel(handle), 0 );
#endif /* CONFIG_IPC */
if (!VALID_HANDLE(handle)) {
WARN(global,"Invalid handle 0x%04x passed to WIN16_GlobalLock16!\n",handle);
return (SEGPTR)0;
}
if (!GET_ARENA_PTR(handle)->base) return (SEGPTR)0;
GET_ARENA_PTR(handle)->lockCount++;
return PTR_SEG_OFF_TO_SEGPTR( GlobalHandleToSel(handle), 0 );
/* FIXME: put segment value in CX as well */
}
return (SEGPTR)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++;
#ifdef CONFIG_IPC
if (is_dde_handle(handle)) return DDE_AttachHandle(handle, NULL);
#endif
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(global,"Invalid handle 0x%04x passed to GlobalUnlock16!\n",handle);
return 0;
}
TRACE(global, "%04x\n", handle );
if (pArena->lockCount) pArena->lockCount--;
return pArena->lockCount;
}
/***********************************************************************
* GlobalSize16 (KERNEL.20)
* RETURNS
* Size in bytes of object
* 0: Failure
*/
DWORD WINAPI GlobalSize16(
HGLOBAL16 handle /* [in] Handle of global memory object */
) {
TRACE(global, "%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(global, "%04x\n", sel );
if (!VALID_HANDLE(sel)) {
WARN(global,"Invalid handle 0x%04x passed to GlobalHandle16!\n",sel);
return 0;
}
return MAKELONG( GET_ARENA_PTR(sel)->handle, GlobalHandleToSel(sel) );
}
/***********************************************************************
* GlobalHandleNoRIP (KERNEL.159)
*/
DWORD WINAPI GlobalHandleNoRIP( 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, GlobalHandleToSel(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(global, "%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN(global,"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(global, "%04x\n", handle );
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
if (!VALID_HANDLE(handle)) {
WARN(global,"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(global, "%04x\n", handle );
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
if (!VALID_HANDLE(handle)) {
WARN(global,"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 GlobalFreeAll( 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(global, "(%d) - stub!\n", size );
return MAKELONG( size, 0xffff );
}
/***********************************************************************
* GlobalLRUOldest (KERNEL.163)
*/
HGLOBAL16 WINAPI GlobalLRUOldest( HGLOBAL16 handle )
{
TRACE(global, "%04x\n", handle );
if (handle == (HGLOBAL16)-1) handle = CURRENT_DS;
return handle;
}
/***********************************************************************
* GlobalLRUNewest (KERNEL.164)
*/
HGLOBAL16 WINAPI GlobalLRUNewest( HGLOBAL16 handle )
{
TRACE(global, "%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 GlobalDOSAlloc(
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 GlobalDOSFree(
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 GlobalPageLock( HGLOBAL16 handle )
{
TRACE(global, "%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN(global,"Invalid handle 0x%04x passed to GlobalPageLock!\n",handle);
return 0;
}
return ++(GET_ARENA_PTR(handle)->pageLockCount);
}
/***********************************************************************
* GlobalPageUnlock (KERNEL.192)
*/
WORD WINAPI GlobalPageUnlock( HGLOBAL16 handle )
{
TRACE(global, "%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN(global,"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(global, "%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN(global,"Invalid handle 0x%04x passed to GlobalFix16!\n",handle);
return 0;
}
GET_ARENA_PTR(handle)->lockCount++;
return GlobalHandleToSel(handle);
}
/***********************************************************************
* GlobalUnfix16 (KERNEL.198)
*/
void WINAPI GlobalUnfix16( HGLOBAL16 handle )
{
TRACE(global, "%04x\n", handle );
if (!VALID_HANDLE(handle)) {
WARN(global,"Invalid handle 0x%04x passed to GlobalUnfix16!\n",handle);
return;
}
GET_ARENA_PTR(handle)->lockCount--;
}
/***********************************************************************
* FarSetOwner (KERNEL.403)
*/
void WINAPI FarSetOwner( HGLOBAL16 handle, HANDLE16 hOwner )
{
if (!VALID_HANDLE(handle)) {
WARN(global,"Invalid handle 0x%04x passed to FarSetOwner!\n",handle);
return;
}
GET_ARENA_PTR(handle)->hOwner = hOwner;
}
/***********************************************************************
* FarGetOwner (KERNEL.404)
*/
HANDLE16 WINAPI FarGetOwner( HGLOBAL16 handle )
{
if (!VALID_HANDLE(handle)) {
WARN(global,"Invalid handle 0x%04x passed to FarGetOwner!\n",handle);
return 0;
}
return GET_ARENA_PTR(handle)->hOwner;
}
/***********************************************************************
* GlobalHandleToSel (TOOLHELP.50)
*/
WORD WINAPI GlobalHandleToSel( HGLOBAL16 handle )
{
TRACE(toolhelp, "%04x\n", handle );
if (!handle) return 0;
#ifdef CONFIG_IPC
if (is_dde_handle(handle)) return DDE_GlobalHandleToSel(handle);
#endif
if (!VALID_HANDLE(handle)) {
WARN(global,"Invalid handle 0x%04x passed to GlobalHandleToSel!\n",handle);
return 0;
}
if (!(handle & 7))
{
WARN(global, "Program attempted invalid selector conversion\n" );
return handle - 1;
}
return handle | 7;
}
/***********************************************************************
* GlobalFirst (TOOLHELP.51)
*/
BOOL16 WINAPI GlobalFirst( GLOBALENTRY *pGlobal, WORD wFlags )
{
if (wFlags == GLOBAL_LRU) return FALSE;
pGlobal->dwNext = 0;
return GlobalNext( pGlobal, wFlags );
}
/***********************************************************************
* GlobalNext (TOOLHELP.52)
*/
BOOL16 WINAPI GlobalNext( 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 = (GetCurrentPDB() == 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 GlobalInfo( 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 GlobalEntryHandle( 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 = (GetCurrentPDB() == 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 GlobalEntryModule( GLOBALENTRY *pGlobal, HMODULE16 hModule,
WORD wSeg )
{
return FALSE;
}
/***********************************************************************
* MemManInfo (TOOLHELP.72)
*/
BOOL16 WINAPI MemManInfo( 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 GetFreeMemInfo(void)
{
MEMMANINFO info;
MemManInfo( &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) ((HGLOBAL32) &((i)->Pointer))
#define POINTER_TO_HANDLE(p) (*(((HGLOBAL32 *)(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;
/***********************************************************************
* GlobalAlloc32 (KERNEL32.315)
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL32 WINAPI GlobalAlloc32(
UINT32 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;
if((flags & GMEM_MOVEABLE)==0) /* POINTER */
{
palloc=HeapAlloc(GetProcessHeap(), hpflags, size);
return (HGLOBAL32) palloc;
}
else /* HANDLE */
{
/* HeapLock(GetProcessHeap()); */
pintern=HeapAlloc(GetProcessHeap(), 0, sizeof(GLOBAL32_INTERN));
if(size)
{
palloc=HeapAlloc(GetProcessHeap(), hpflags, size+sizeof(HGLOBAL32));
*(HGLOBAL32 *)palloc=INTERN_TO_HANDLE(pintern);
pintern->Pointer=palloc+sizeof(HGLOBAL32);
}
else
pintern->Pointer=NULL;
pintern->Magic=MAGIC_GLOBAL_USED;
pintern->Flags=flags>>8;
pintern->LockCount=0;
/* HeapUnlock(GetProcessHeap()); */
return INTERN_TO_HANDLE(pintern);
}
}
/***********************************************************************
* GlobalLock32 (KERNEL32.326)
* RETURNS
* Pointer to first byte of block
* NULL: Failure
*/
LPVOID WINAPI GlobalLock32(
HGLOBAL32 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(global, "invalid handle\n");
palloc=(LPVOID) NULL;
}
/* HeapUnlock(GetProcessHeap()); */;
return palloc;
}
/***********************************************************************
* GlobalUnlock32 (KERNEL32.332)
* RETURNS
* TRUE: Object is still locked
* FALSE: Object is unlocked
*/
BOOL32 WINAPI GlobalUnlock32(
HGLOBAL32 hmem /* [in] Handle of global memory object */
) {
PGLOBAL32_INTERN pintern;
BOOL32 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(global, "invalid handle\n");
locked=FALSE;
}
/* HeapUnlock(GetProcessHeap()); */
return locked;
}
/***********************************************************************
* GlobalHandle32 (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
*/
HGLOBAL32 WINAPI GlobalHandle32(
LPCVOID pmem /* [in] Pointer to global memory block */
) {
HGLOBAL32 handle;
if (!HEAP_IsInsideHeap( GetProcessHeap(), 0, pmem )) goto error;
handle = POINTER_TO_HANDLE(pmem);
if (HEAP_IsInsideHeap( GetProcessHeap(), 0, (LPCVOID)handle ))
{
if (HANDLE_TO_INTERN(handle)->Magic == MAGIC_GLOBAL_USED)
return handle; /* valid moveable block */
}
/* maybe FIXED block */
if (HeapValidate( GetProcessHeap(), 0, pmem ))
return (HGLOBAL32)pmem; /* valid fixed block */
error:
SetLastError( ERROR_INVALID_HANDLE );
return 0;
}
/***********************************************************************
* GlobalReAlloc32 (KERNEL32.328)
* RETURNS
* Handle: Success
* NULL: Failure
*/
HGLOBAL32 WINAPI GlobalReAlloc32(
HGLOBAL32 hmem, /* [in] Handle of global memory object */
DWORD size, /* [in] New size of block */
UINT32 flags /* [in] How to reallocate object */
) {
LPVOID palloc;
HGLOBAL32 hnew;
PGLOBAL32_INTERN pintern;
hnew = 0;
/* HeapLock(GetProcessHeap()); */
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(global, "GlobalReAlloc32 with null handle!\n");
SetLastError( ERROR_INVALID_ACCESS_TO_MEM );
return 0;
}
size=HeapSize(GetProcessHeap(), 0, (LPVOID) hmem);
hnew=GlobalAlloc32( flags, size);
palloc=GlobalLock32(hnew);
memcpy(palloc, (LPVOID) hmem, size);
GlobalUnlock32(hnew);
GlobalFree32(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=(HGLOBAL32)HeapReAlloc(GetProcessHeap(), 0, (LPVOID) hmem, size);
}
else
{
/* reallocate a moveable block */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->LockCount>1) {
ERR(global,"handle 0x%08lx is still locked, cannot realloc!\n",(DWORD)hmem);
SetLastError(ERROR_INVALID_HANDLE);
} else if(size!=0)
{
hnew=hmem;
if(pintern->Pointer)
{
palloc=HeapReAlloc(GetProcessHeap(), 0,
pintern->Pointer-sizeof(HGLOBAL32),
size+sizeof(HGLOBAL32) );
pintern->Pointer=palloc+sizeof(HGLOBAL32);
}
else
{
palloc=HeapAlloc(GetProcessHeap(), 0, size+sizeof(HGLOBAL32));
*(HGLOBAL32 *)palloc=hmem;
pintern->Pointer=palloc+sizeof(HGLOBAL32);
}
}
else
{
if(pintern->Pointer)
{
HeapFree(GetProcessHeap(), 0, pintern->Pointer-sizeof(HGLOBAL32));
pintern->Pointer=NULL;
}
}
}
}
/* HeapUnlock(GetProcessHeap()); */
return hnew;
}
/***********************************************************************
* GlobalFree32 (KERNEL32.322)
* RETURNS
* NULL: Success
* Handle: Failure
*/
HGLOBAL32 WINAPI GlobalFree32(
HGLOBAL32 hmem /* [in] Handle of global memory object */
) {
PGLOBAL32_INTERN pintern;
HGLOBAL32 hreturned = 0;
if(ISPOINTER(hmem)) /* POINTER */
{
if(!HeapFree(GetProcessHeap(), 0, (LPVOID) hmem)) hmem = 0;
}
else /* HANDLE */
{
/* HeapLock(GetProcessHeap()); */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
if(pintern->LockCount!=0)
SetLastError(ERROR_INVALID_HANDLE);
if(pintern->Pointer)
if(!HeapFree(GetProcessHeap(), 0,
(char *)(pintern->Pointer)-sizeof(HGLOBAL32)))
hreturned=hmem;
if(!HeapFree(GetProcessHeap(), 0, pintern))
hreturned=hmem;
}
/* HeapUnlock(GetProcessHeap()); */
}
return hreturned;
}
/***********************************************************************
* GlobalSize32 (KERNEL32.329)
* RETURNS
* Size in bytes of the global memory object
* 0: Failure
*/
DWORD WINAPI GlobalSize32(
HGLOBAL32 hmem /* [in] Handle of global memory object */
) {
DWORD retval;
PGLOBAL32_INTERN pintern;
if(ISPOINTER(hmem))
{
retval=HeapSize(GetProcessHeap(), 0, (LPVOID) hmem);
}
else
{
/* HeapLock(GetProcessHeap()); */
pintern=HANDLE_TO_INTERN(hmem);
if(pintern->Magic==MAGIC_GLOBAL_USED)
{
retval=HeapSize(GetProcessHeap(), 0,
(char *)(pintern->Pointer)-sizeof(HGLOBAL32))-4;
}
else
{
WARN(global, "invalid handle\n");
retval=0;
}
/* HeapUnlock(GetProcessHeap()); */
}
return retval;
}
/***********************************************************************
* GlobalWire32 (KERNEL32.333)
*/
LPVOID WINAPI GlobalWire32(HGLOBAL32 hmem)
{
return GlobalLock32( hmem );
}
/***********************************************************************
* GlobalUnWire32 (KERNEL32.330)
*/
BOOL32 WINAPI GlobalUnWire32(HGLOBAL32 hmem)
{
return GlobalUnlock32( hmem);
}
/***********************************************************************
* GlobalFix32 (KERNEL32.320)
*/
VOID WINAPI GlobalFix32(HGLOBAL32 hmem)
{
GlobalLock32( hmem );
}
/***********************************************************************
* GlobalUnfix32 (KERNEL32.331)
*/
VOID WINAPI GlobalUnfix32(HGLOBAL32 hmem)
{
GlobalUnlock32( hmem);
}
/***********************************************************************
* GlobalFlags32 (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
*/
UINT32 WINAPI GlobalFlags32(
HGLOBAL32 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(global,"Invalid handle: %04x", hmem);
retval=0;
}
/* HeapUnlock(GetProcessHeap()); */
}
return retval;
}
/***********************************************************************
* GlobalCompact32 (KERNEL32.316)
*/
DWORD WINAPI GlobalCompact32( DWORD minfree )
{
return 0; /* GlobalCompact does nothing in Win32 */
}
/***********************************************************************
* GlobalMemoryStatus (KERNEL32.327)
* RETURNS
* None
*/
VOID WINAPI GlobalMemoryStatus(
LPMEMORYSTATUS lpmem
) {
#ifdef linux
FILE *f = fopen( "/proc/meminfo", "r" );
if (f)
{
char buffer[256];
int total, used, free;
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", &total, &used, &free ))
{
lpmem->dwTotalPhys += total;
lpmem->dwAvailPhys += free;
}
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;
}
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);
return;
}
}
#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;
}
/**********************************************************************
* WOWGlobalAllocLock (KERNEL32.62)
*
* Combined GlobalAlloc and GlobalLock.
*/
SEGPTR WINAPI WOWGlobalAllocLock16(DWORD flags,DWORD cb,HGLOBAL16 *hmem)
{
HGLOBAL16 xhmem;
xhmem = GlobalAlloc16(flags,cb);
if (hmem) *hmem = xhmem;
return WIN16_GlobalLock16(xhmem);
}
/**********************************************************************
* WOWGlobalUnlockFree (KERNEL32.64)
*
* Combined GlobalUnlock and GlobalFree.
*/
WORD WINAPI WOWGlobalUnlockFree16(DWORD vpmem) {
if (!GlobalUnlock16(HIWORD(vpmem)))
return 0;
return GlobalFree16(HIWORD(vpmem));
}
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