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Sweden-Number/memory/local.c

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/*
* Local heap functions
*
* Copyright 1995 Alexandre Julliard
*/
/*
* Note:
* All local heap functions need the current DS as first parameter
* when called from the emulation library, so they take one more
* parameter than usual.
*/
#include <stdlib.h>
#include <string.h>
#include "windows.h"
#include "ldt.h"
#include "instance.h"
#include "local.h"
#include "module.h"
#include "stackframe.h"
#include "toolhelp.h"
#include "stddebug.h"
#include "debug.h"
#ifndef WINELIB
#pragma pack(1)
#endif
typedef struct
{
/* Arena header */
WORD prev; /* Previous arena | arena type */
WORD next; /* Next arena */
/* Start of the memory block or free-list info */
WORD size; /* Size of the free block */
WORD free_prev; /* Previous free block */
WORD free_next; /* Next free block */
} LOCALARENA;
#define ARENA_HEADER_SIZE 4
#define ARENA_HEADER( handle) ( ((handle) & ~3) - ARENA_HEADER_SIZE)
/* Arena types (stored in 'prev' field of the arena) */
#define LOCAL_ARENA_FREE 0
#define LOCAL_ARENA_FIXED 1
#define LOCAL_ARENA_MOVEABLE 3
typedef struct
{
WORD addr; /* Address of the MOVEABLE block */
BYTE flags; /* Flags for this block */
BYTE lock; /* Lock count */
} LOCALHANDLEENTRY;
typedef struct
{
WORD check; /* Heap checking flag */
WORD freeze; /* Heap frozen flag */
WORD items; /* Count of items on the heap */
WORD first; /* First item of the heap */
WORD pad1; /* Always 0 */
WORD last; /* Last item of the heap */
WORD pad2; /* Always 0 */
BYTE ncompact; /* Compactions counter */
BYTE dislevel; /* Discard level */
DWORD distotal; /* Total bytes discarded */
WORD htable; /* Pointer to handle table */
WORD hfree; /* Pointer to free handle table */
WORD hdelta; /* Delta to expand the handle table */
WORD expand; /* Pointer to expand function (unused) */
WORD pstat; /* Pointer to status structure (unused) */
DWORD notify WINE_PACKED; /* Pointer to LocalNotify() function */
WORD lock; /* Lock count for the heap */
WORD extra; /* Extra bytes to allocate when expanding */
WORD minsize; /* Minimum size of the heap */
WORD magic; /* Magic number */
} LOCALHEAPINFO;
#ifndef WINELIB
#pragma pack(4)
#endif
#define LOCAL_HEAP_MAGIC 0x484c /* 'LH' */
/* All local heap allocations are aligned on 4-byte boundaries */
#define LALIGN(word) (((word) + 3) & ~3)
#define ARENA_PTR(ptr,arena) ((LOCALARENA *)((char*)(ptr)+(arena)))
#define ARENA_PREV(ptr,arena) (ARENA_PTR(ptr,arena)->prev & ~3)
#define ARENA_NEXT(ptr,arena) (ARENA_PTR(ptr,arena)->next)
#define ARENA_FLAGS(ptr,arena) (ARENA_PTR(ptr,arena)->prev & 3)
/* determine whether the handle belongs to a fixed or a moveable block */
#define HANDLE_FIXED(handle) (((handle) & 3) == 0)
#define HANDLE_MOVEABLE(handle) (((handle) & 3) == 2)
/***********************************************************************
* LOCAL_GetHeap
*
* Return a pointer to the local heap, making sure it exists.
*/
static LOCALHEAPINFO *LOCAL_GetHeap( WORD ds )
{
LOCALHEAPINFO *pInfo;
INSTANCEDATA *ptr = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN( ds, 0 );
dprintf_local( stddeb, "Heap at %p, %04x\n", ptr, ptr->heap );
if (!ptr->heap) return 0;
pInfo = (LOCALHEAPINFO*)((char*)ptr + ptr->heap);
if (pInfo->magic != LOCAL_HEAP_MAGIC) return NULL;
return pInfo;
}
/***********************************************************************
* LOCAL_MakeBlockFree
*
* Make a block free, inserting it in the free-list.
* 'block' is the handle of the block arena; 'baseptr' points to
* the beginning of the data segment containing the heap.
*/
static void LOCAL_MakeBlockFree( char *baseptr, WORD block )
{
LOCALARENA *pArena, *pNext;
WORD next;
/* Mark the block as free */
pArena = ARENA_PTR( baseptr, block );
pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FREE;
pArena->size = pArena->next - block;
/* Find the next free block (last block is always free) */
next = pArena->next;
for (;;)
{
pNext = ARENA_PTR( baseptr, next );
if ((pNext->prev & 3) == LOCAL_ARENA_FREE) break;
next = pNext->next;
}
dprintf_local( stddeb, "Local_AddFreeBlock %04x, next %04x\n", block, next );
/* Insert the free block in the free-list */
pArena->free_prev = pNext->free_prev;
pArena->free_next = next;
ARENA_PTR(baseptr,pNext->free_prev)->free_next = block;
pNext->free_prev = block;
}
/***********************************************************************
* LOCAL_RemoveFreeBlock
*
* Remove a block from the free-list.
* 'block' is the handle of the block arena; 'baseptr' points to
* the beginning of the data segment containing the heap.
*/
static void LOCAL_RemoveFreeBlock( char *baseptr, WORD block )
{
/* Mark the block as fixed */
LOCALARENA *pArena = ARENA_PTR( baseptr, block );
pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FIXED;
/* Remove it from the list */
ARENA_PTR(baseptr,pArena->free_prev)->free_next = pArena->free_next;
ARENA_PTR(baseptr,pArena->free_next)->free_prev = pArena->free_prev;
}
/***********************************************************************
* LOCAL_AddBlock
*
* Insert a new block in the heap.
* 'new' is the handle of the new block arena; 'baseptr' points to
* the beginning of the data segment containing the heap; 'prev' is
* the block before the new one.
*/
static void LOCAL_AddBlock( char *baseptr, WORD prev, WORD new )
{
LOCALARENA *pPrev = ARENA_PTR( baseptr, prev );
LOCALARENA *pNew = ARENA_PTR( baseptr, new );
pNew->prev = prev | LOCAL_ARENA_FIXED;
pNew->next = pPrev->next;
ARENA_PTR(baseptr,pPrev->next)->prev &= 3;
ARENA_PTR(baseptr,pPrev->next)->prev |= new;
pPrev->next = new;
}
/***********************************************************************
* LOCAL_RemoveBlock
*
* Remove a block from the heap.
* 'block' is the handle of the block arena; 'baseptr' points to
* the beginning of the data segment containing the heap.
*/
static void LOCAL_RemoveBlock( char *baseptr, WORD block )
{
LOCALARENA *pArena, *pTmp;
/* Remove the block from the free-list */
dprintf_local( stddeb, "Local_RemoveBlock\n");
pArena = ARENA_PTR( baseptr, block );
if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
LOCAL_RemoveFreeBlock( baseptr, block );
/* If the previous block is free, expand its size */
pTmp = ARENA_PTR( baseptr, pArena->prev & ~3 );
if ((pTmp->prev & 3) == LOCAL_ARENA_FREE)
pTmp->size += pArena->next - block;
/* Remove the block from the linked list */
pTmp->next = pArena->next;
pTmp = ARENA_PTR( baseptr, pArena->next );
pTmp->prev = (pTmp->prev & 3) | (pArena->prev & ~3);
}
/***********************************************************************
* LOCAL_PrintHeap
*/
static void LOCAL_PrintHeap( WORD ds )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
WORD arena;
if (!debugging_local) return;
if (!pInfo)
{
printf( "Local Heap corrupted! ds=%04x\n", ds );
return;
}
printf( "Local Heap ds=%04x first=%04x last=%04x items=%d\n",
ds, pInfo->first, pInfo->last, pInfo->items );
arena = pInfo->first;
for (;;)
{
LOCALARENA *pArena = ARENA_PTR(ptr,arena);
printf( " %04x: prev=%04x next=%04x type=%d\n", arena,
pArena->prev & ~3, pArena->next, pArena->prev & 3 );
if (arena == pInfo->first)
{
printf( " size=%d free_prev=%04x free_next=%04x\n",
pArena->size, pArena->free_prev, pArena->free_next );
}
if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
{
printf( " size=%d free_prev=%04x free_next=%04x\n",
pArena->size, pArena->free_prev, pArena->free_next );
if (pArena->next == arena) break; /* last one */
if (ARENA_PTR(ptr,pArena->free_next)->free_prev != arena)
{
printf( "*** arena->free_next->free_prev != arena\n" );
break;
}
}
if (pArena->next == arena)
{
printf( "*** last block is not marked free\n" );
break;
}
if ((ARENA_PTR(ptr,pArena->next)->prev & ~3) != arena)
{
printf( "*** arena->next->prev != arena (%04x, %04x)\n",
pArena->next, ARENA_PTR(ptr,pArena->next)->prev);
break;
}
arena = pArena->next;
}
}
/***********************************************************************
* LocalInit (KERNEL.4)
*/
BOOL LocalInit( HANDLE selector, WORD start, WORD end )
{
char *ptr;
WORD heapInfoArena, freeArena, lastArena;
LOCALHEAPINFO *pHeapInfo;
LOCALARENA *pArena, *pFirstArena, *pLastArena;
NE_MODULE *pModule;
/* The initial layout of the heap is: */
/* - first arena (FIXED) */
/* - heap info structure (FIXED) */
/* - large free block (FREE) */
/* - last arena (FREE) */
dprintf_local(stddeb, "LocalInit: %04x %04x-%04x\n", selector, start, end);
if (!selector) selector = CURRENT_DS;
pHeapInfo = LOCAL_GetHeap(selector);
if (pHeapInfo) {
fprintf( stderr, "LocalInit: Heap %04x initialized twice.\n", selector);
if (debugging_local) LOCAL_PrintHeap(selector);
}
if (start == 0) {
/* Check if the segment is the DGROUP of a module */
if ((pModule = (NE_MODULE *)GlobalLock( GetExePtr( selector ) )))
{
SEGTABLEENTRY *pSeg = NE_SEG_TABLE( pModule ) + pModule->dgroup - 1;
if (pModule->dgroup && (pSeg->selector == selector)) {
/* We can't just use the simple method of using the value
* of minsize + stacksize, since there are programs that
* resize the data segment before calling InitTask(). So,
* we must put it at the end of the segment */
start = GlobalSize( GlobalHandle( selector ) );
start -= end;
end += start;
dprintf_local( stddeb," new start %04x, minstart: %04x\n", start, pSeg->minsize + pModule->stack_size);
}
}
}
ptr = PTR_SEG_OFF_TO_LIN( selector, 0 );
start = LALIGN( MAX( start, sizeof(INSTANCEDATA) ) );
heapInfoArena = LALIGN(start + sizeof(LOCALARENA) );
freeArena = LALIGN( heapInfoArena + ARENA_HEADER_SIZE
+ sizeof(LOCALHEAPINFO) );
lastArena = (end - sizeof(LOCALARENA)) & ~3;
/* Make sure there's enough space. */
if (freeArena + sizeof(LOCALARENA) >= lastArena) return FALSE;
/* Initialise the first arena */
pFirstArena = ARENA_PTR( ptr, start );
pFirstArena->prev = start | LOCAL_ARENA_FIXED;
pFirstArena->next = heapInfoArena;
pFirstArena->size = LALIGN(sizeof(LOCALARENA));
pFirstArena->free_prev = start; /* this one */
pFirstArena->free_next = freeArena;
/* Initialise the arena of the heap info structure */
pArena = ARENA_PTR( ptr, heapInfoArena );
pArena->prev = start | LOCAL_ARENA_FIXED;
pArena->next = freeArena;
/* Initialise the heap info structure */
pHeapInfo = (LOCALHEAPINFO *) (ptr + heapInfoArena + ARENA_HEADER_SIZE );
memset( pHeapInfo, 0, sizeof(LOCALHEAPINFO) );
pHeapInfo->items = 4;
pHeapInfo->first = start;
pHeapInfo->last = lastArena;
pHeapInfo->htable = 0;
pHeapInfo->hdelta = 0x20;
pHeapInfo->extra = 0x200;
pHeapInfo->minsize = lastArena - freeArena;
pHeapInfo->magic = LOCAL_HEAP_MAGIC;
/* Initialise the large free block */
pArena = ARENA_PTR( ptr, freeArena );
pArena->prev = heapInfoArena | LOCAL_ARENA_FREE;
pArena->next = lastArena;
pArena->size = lastArena - freeArena;
pArena->free_prev = start;
pArena->free_next = lastArena;
/* Initialise the last block */
pLastArena = ARENA_PTR( ptr, lastArena );
pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
pLastArena->next = lastArena; /* this one */
pLastArena->size = LALIGN(sizeof(LOCALARENA));
pLastArena->free_prev = freeArena;
pLastArena->free_next = lastArena; /* this one */
/* Store the local heap address in the instance data */
((INSTANCEDATA *)ptr)->heap = heapInfoArena + ARENA_HEADER_SIZE;
LOCAL_PrintHeap( selector );
return TRUE;
}
/***********************************************************************
* LOCAL_GrowHeap
*/
static void LOCAL_GrowHeap( WORD ds )
{
HANDLE hseg = GlobalHandle( ds );
LONG oldsize = GlobalSize( hseg );
LONG end;
LOCALHEAPINFO *pHeapInfo;
WORD freeArena, lastArena;
LOCALARENA *pArena, *pLastArena;
char *ptr;
/* if nothing can be gained, return */
if (oldsize > 0xfff0) return;
hseg = GlobalReAlloc( hseg, 0x10000, GMEM_FIXED );
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pHeapInfo = LOCAL_GetHeap( ds );
if (pHeapInfo == NULL) {
fprintf( stderr, "Local_GrowHeap: heap not found\n" );
return;
}
end = GlobalSize( hseg );
lastArena = (end - sizeof(LOCALARENA)) & ~3;
/* Update the HeapInfo */
pHeapInfo->items++;
freeArena = pHeapInfo->last;
pHeapInfo->last = lastArena;
pHeapInfo->minsize += end - oldsize;
/* grow the old last block */
/* FIXME: merge two adjacent free blocks */
pArena = ARENA_PTR( ptr, freeArena );
pArena->size = lastArena - freeArena;
pArena->next = lastArena;
pArena->free_next = lastArena;
/* Initialise the new last block */
pLastArena = ARENA_PTR( ptr, lastArena );
pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
pLastArena->next = lastArena; /* this one */
pLastArena->size = LALIGN(sizeof(LOCALARENA));
pLastArena->free_prev = freeArena;
pLastArena->free_next = lastArena; /* this one */
dprintf_local( stddeb, "Heap expanded\n" );
LOCAL_PrintHeap( ds );
}
/***********************************************************************
* LOCAL_Compact
*/
static WORD LOCAL_Compact( WORD ds, WORD minfree, WORD flags )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena;
WORD arena;
WORD freespace = 0;
if (!(pInfo = LOCAL_GetHeap( ds ))) {
dprintf_local( stddeb, "Local_FindFreeBlock: Local heap not found\n" );
LOCAL_PrintHeap(ds);
return 0;
}
arena = pInfo->first;
pArena = ARENA_PTR( ptr, arena );
while (arena != pArena->free_next) {
arena = pArena->free_next;
pArena = ARENA_PTR( ptr, arena );
if (pArena->size >= freespace) freespace = pArena->size;
}
if (flags & LMEM_NOCOMPACT) return freespace;
if (flags & LMEM_NODISCARD) return freespace;
return freespace;
}
/***********************************************************************
* LOCAL_FindFreeBlock
*/
static HLOCAL LOCAL_FindFreeBlock( WORD ds, WORD size )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena;
WORD arena;
if (!(pInfo = LOCAL_GetHeap( ds ))) {
dprintf_local( stddeb, "Local_FindFreeBlock: Local heap not found\n" );
LOCAL_PrintHeap(ds);
return 0;
}
arena = pInfo->first;
pArena = ARENA_PTR( ptr, arena );
for (;;) {
arena = pArena->free_next;
pArena = ARENA_PTR( ptr, arena );
if (arena == pArena->free_next) break;
if (pArena->size >= size) return arena;
}
dprintf_local( stddeb, "Local_FindFreeBlock: not enough space\n" );
if (debugging_local) LOCAL_PrintHeap(ds);
return 0;
}
/***********************************************************************
* LOCAL_GetBlock
* The segment may get moved around in this function, so all callers
* should reset their pointer variables.
*/
static HLOCAL LOCAL_GetBlock( WORD ds, WORD size, WORD flags )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena;
WORD arena;
if (!(pInfo = LOCAL_GetHeap( ds ))) {
dprintf_local( stddeb, "Local_GetBlock: Local heap not found\n");
LOCAL_PrintHeap(ds);
return 0;
}
size += ARENA_HEADER_SIZE;
size = LALIGN( MAX( size, sizeof(LOCALARENA) ) );
/* Find a suitable free block */
arena = LOCAL_FindFreeBlock( ds, size );
if (arena == 0) {
/* no space: try to make some */
LOCAL_Compact( ds, size, flags );
arena = LOCAL_FindFreeBlock( ds, size );
}
if (arena == 0) {
/* still no space: try to grow the segment */
LOCAL_GrowHeap( ds );
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pInfo = LOCAL_GetHeap( ds );
arena = LOCAL_FindFreeBlock( ds, size );
}
if (arena == 0) {
fprintf( stderr, "Local_GetBlock: not enough space!\n" );
return 0;
}
/* Make a block out of the free arena */
pArena = ARENA_PTR( ptr, arena );
dprintf_local( stddeb, "LOCAL_GetBlock size = %04x, arena at %04x size %04x\n", size,
arena, pArena->size );
if (pArena->size > size + LALIGN(sizeof(LOCALARENA)))
{
LOCAL_AddBlock( ptr, arena, arena+size );
LOCAL_MakeBlockFree( ptr, arena+size );
pInfo->items++;
}
LOCAL_RemoveFreeBlock( ptr, arena );
if (flags & LMEM_ZEROINIT) {
memset( (char *)pArena + ARENA_HEADER_SIZE, 0, size - ARENA_HEADER_SIZE );
}
dprintf_local( stddeb, "Local_GetBlock: arena at %04x\n", arena );
return arena + ARENA_HEADER_SIZE;
}
/***********************************************************************
* LOCAL_NewHTable
*/
static BOOL LOCAL_NewHTable( WORD ds )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
HLOCAL handle;
dprintf_local( stddeb, "Local_NewHTable\n" );
if (!(pInfo = LOCAL_GetHeap( ds ))) {
dprintf_local( stddeb, "Local heap not found\n");
LOCAL_PrintHeap(ds);
return FALSE;
}
handle = LOCAL_GetBlock( ds, pInfo->hdelta*4 + 2, LMEM_FIXED );
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pInfo = LOCAL_GetHeap( ds );
if (handle == 0) return FALSE;
*(WORD *)(ptr + handle) = 0; /* no handles in this block yet */
pInfo->htable = handle;
return TRUE;
}
/***********************************************************************
* LOCAL_GetNewHandle
*/
static HLOCAL LOCAL_GetNewHandle( WORD ds )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
WORD count;
if (!(pInfo = LOCAL_GetHeap( ds ))) {
dprintf_local( stddeb, "LOCAL_GetNewHandle: Local heap not found\n");
LOCAL_PrintHeap(ds);
return 0;
}
/* Check if we need a new handle table */
if (pInfo->htable == 0) {
if (!LOCAL_NewHTable( ds )) return 0;
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pInfo = LOCAL_GetHeap( ds );
}
if (*(WORD *)(ptr + pInfo->htable) == pInfo->hdelta) {
if (!LOCAL_NewHTable( ds )) return 0;
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pInfo = LOCAL_GetHeap( ds );
}
/* increase count */
count = (*(WORD *)(ptr + pInfo->htable))++;
dprintf_local( stddeb, "Local_GetNewHandle: %04x\n", pInfo->htable + 2 + 4*count );
return pInfo->htable + 2 + 4*count;
}
/***********************************************************************
* LOCAL_FreeArena
*/
static HLOCAL LOCAL_FreeArena( WORD ds, WORD arena )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena, *pPrev, *pNext;
dprintf_local( stddeb, "LocalFreeArena: %04x ds=%04x\n", arena, ds );
if (!(pInfo = LOCAL_GetHeap( ds ))) return arena;
pArena = ARENA_PTR( ptr, arena );
if ((pArena->prev & 3) == LOCAL_ARENA_FREE) {
/* shouldn't happen */
fprintf( stderr, "LocalFreeArena: Trying to free a block twice!\n" );
LOCAL_PrintHeap( ds );
return arena;
}
/* Check if we can merge with the previous block */
pPrev = ARENA_PTR( ptr, pArena->prev & ~3 );
pNext = ARENA_PTR( ptr, pArena->next );
if ((pPrev->prev & 3) == LOCAL_ARENA_FREE)
{
arena = pArena->prev & ~3;
pArena = pPrev;
LOCAL_RemoveBlock( ptr, pPrev->next );
pInfo->items--;
}
else /* Make a new free block */
{
LOCAL_MakeBlockFree( ptr, arena );
}
/* Check if we can merge with the next block */
if ((pArena->next == pArena->free_next) &&
(pArena->next != pInfo->last))
{
LOCAL_RemoveBlock( ptr, pArena->next );
pInfo->items--;
}
return 0;
}
/***********************************************************************
* LOCAL_Free
*
* Implementation of LocalFree().
*/
HLOCAL LOCAL_Free( HANDLE ds, HLOCAL handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
WORD arena;
dprintf_local( stddeb, "LocalFree: %04x ds=%04x\n", handle, ds );
if (HANDLE_FIXED( handle )) {
arena = ARENA_HEADER( handle );
} else {
arena = ARENA_HEADER( *(WORD *)(ptr + handle) );
dprintf_local( stddeb, "LocalFree: real block at %04x\n", arena);
}
arena = LOCAL_FreeArena( ds, arena );
if (arena != 0) return handle; /* couldn't free it */
return 0;
}
/***********************************************************************
* LOCAL_Alloc
*
* Implementation of LocalAlloc().
*/
HLOCAL LOCAL_Alloc( HANDLE ds, WORD flags, WORD size )
{
char *ptr;
HLOCAL handle;
dprintf_local( stddeb, "LocalAlloc: %04x %d ds=%04x\n", flags, size, ds );
if (flags & LMEM_MOVEABLE) {
LOCALHANDLEENTRY *plhe;
HLOCAL hmem;
hmem = LOCAL_GetBlock( ds, size + 2, flags );
if (hmem == 0) return 0;
handle = LOCAL_GetNewHandle( ds );
if (handle == 0) {
fprintf( stderr, "LocalAlloc: couldn't get handle\n");
LOCAL_FreeArena( ds, ARENA_HEADER(hmem) );
return 0;
}
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
*(WORD *)(ptr + hmem) = handle;
plhe = (LOCALHANDLEENTRY *)(ptr + handle);
plhe->addr = hmem + 2;
plhe->lock = 0;
} else {
handle = LOCAL_GetBlock( ds, size, flags );
}
return handle;
}
/***********************************************************************
* LOCAL_ReAlloc
*
* Implementation of LocalReAlloc().
*/
HLOCAL LOCAL_ReAlloc( HANDLE ds, HLOCAL handle, WORD size, WORD flags )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena, *pNext;
WORD arena, newhandle, blockhandle;
LONG nextarena;
if (!handle) return LOCAL_Alloc( ds, size, flags );
dprintf_local( stddeb, "LocalReAlloc: %04x %d %04x ds=%04x\n",
handle, size, flags, ds );
if (!(pInfo = LOCAL_GetHeap( ds ))) return 0;
if (HANDLE_FIXED( handle )) {
blockhandle = handle;
} else {
size += 2;
blockhandle = *(WORD *)(ptr + handle);
dprintf_local( stddeb, " blockhandle %04x (%04x)\n", blockhandle,
*(WORD *)(ptr + blockhandle - 2));
}
arena = ARENA_HEADER( blockhandle );
dprintf_local( stddeb, "LocalReAlloc: arena is %04x\n", arena );
pArena = ARENA_PTR( ptr, arena );
if (flags & LMEM_MODIFY) {
dprintf_local( stddeb, "LMEM_MODIFY set\n");
return handle;
}
if (!size) size = 1;
size = LALIGN( size );
nextarena = LALIGN(blockhandle + size);
/* Check for size reduction */
if (nextarena < pArena->next)
{
if (nextarena < pArena->next - LALIGN(sizeof(LOCALARENA)))
{
dprintf_local( stddeb, "size reduction, making new free block\n");
/* It is worth making a new free block */
LOCAL_AddBlock( ptr, arena, nextarena );
LOCAL_MakeBlockFree( ptr, nextarena );
pInfo->items++;
}
dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", handle );
return handle;
}
/* Check if the next block is free */
pNext = ARENA_PTR( ptr, pArena->next );
if (((pNext->prev & 3) == LOCAL_ARENA_FREE) &&
(nextarena <= pNext->next))
{
LOCAL_RemoveBlock( ptr, pArena->next );
if (nextarena < pArena->next - LALIGN(sizeof(LOCALARENA)))
{
dprintf_local( stddeb, "size increase, making new free block\n");
/* It is worth making a new free block */
LOCAL_AddBlock( ptr, arena, nextarena );
LOCAL_MakeBlockFree( ptr, nextarena );
pInfo->items++;
}
dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", handle );
return handle;
}
/* Now we have to allocate a new block */
newhandle = LOCAL_GetBlock( ds, size, flags );
if (newhandle == 0) return 0;
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
memcpy( ptr + newhandle, ptr + (arena + ARENA_HEADER_SIZE), size );
LOCAL_FreeArena( ds, arena );
if (HANDLE_MOVEABLE( handle )) {
newhandle += 2;
dprintf_local( stddeb, "LocalReAlloc: fixing handle\n");
*(WORD *)(ptr + handle) = newhandle;
newhandle = handle;
}
dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", newhandle );
return newhandle;
}
/***********************************************************************
* LOCAL_Lock
*/
HANDLE LOCAL_Lock( HANDLE ds, HLOCAL handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
dprintf_local( stddeb, "LocalLock: %04x ", handle );
if (HANDLE_MOVEABLE(handle))
{
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
if (pEntry->lock < 255) pEntry->lock++;
handle = pEntry->addr;
}
dprintf_local( stddeb, "returning %04x\n", handle );
return handle;
}
/***********************************************************************
* LOCAL_Unlock
*/
BOOL LOCAL_Unlock( WORD ds, HLOCAL handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
dprintf_local( stddeb, "LocalUnlock: %04x\n", handle );
if (HANDLE_MOVEABLE(handle))
{
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
if (!pEntry->lock || (pEntry->lock == 255)) return FALSE;
/* For moveable block, return the new lock count */
/* (see _Windows_Internals_ p. 197) */
return --pEntry->lock;
}
else return FALSE;
}
/***********************************************************************
* LOCAL_Size
*
* Implementation of LocalSize().
*/
WORD LOCAL_Size( WORD ds, HLOCAL handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( CURRENT_DS, 0 );
LOCALARENA *pArena;
WORD arena;
dprintf_local( stddeb, "LocalSize: %04x ds=%04x\n", handle, ds );
if (HANDLE_FIXED( handle )) {
arena = ARENA_HEADER( handle );
} else {
arena = ARENA_HEADER( handle = *(WORD *)(ptr + handle) );
}
pArena = ARENA_PTR( ptr, arena );
return pArena->next - handle;
}
/***********************************************************************
* LOCAL_HeapSize
*
* Implementation of LocalHeapSize().
*/
WORD LOCAL_HeapSize( WORD ds )
{
LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
if (!pInfo) return 0;
return pInfo->last - pInfo->first;
}
/***********************************************************************
* LocalAlloc (KERNEL.5)
*/
HLOCAL LocalAlloc( WORD flags, WORD size )
{
return LOCAL_Alloc( CURRENT_DS, flags, size );
}
/***********************************************************************
* LocalReAlloc (KERNEL.6)
*/
HLOCAL LocalReAlloc( HLOCAL handle, WORD size, WORD flags )
{
return LOCAL_ReAlloc( CURRENT_DS, handle, size, flags );
}
/***********************************************************************
* LocalFree (KERNEL.7)
*/
HLOCAL LocalFree( HLOCAL handle )
{
return LOCAL_Free( CURRENT_DS, handle );
}
/***********************************************************************
* LocalLock (KERNEL.8)
*/
NPVOID LocalLock( HLOCAL handle )
{
return LOCAL_Lock( CURRENT_DS, handle );
}
/***********************************************************************
* LocalUnlock (KERNEL.9)
*/
BOOL LocalUnlock( HLOCAL handle )
{
return LOCAL_Unlock( CURRENT_DS, handle );
}
/***********************************************************************
* LocalSize (KERNEL.10)
*/
WORD LocalSize( HLOCAL handle )
{
return LOCAL_Size( CURRENT_DS, handle );
}
/***********************************************************************
* LocalHandle (KERNEL.11)
*/
HLOCAL LocalHandle( WORD addr )
{
char *ptr = PTR_SEG_OFF_TO_LIN( CURRENT_DS, 0 );
dprintf_local( stddeb, "LocalHandle: %04x\n", addr );
if (HANDLE_MOVEABLE( addr )) {
addr = *(WORD *)(ptr + addr - 2);
}
return addr;
}
/***********************************************************************
* LocalFlags (KERNEL.12)
*/
WORD LocalFlags( HLOCAL handle )
{
dprintf_local( stddeb, "LocalFlags: %04x\n", handle );
return 0;
}
/***********************************************************************
* LocalCompact (KERNEL.13)
*/
WORD LocalCompact( WORD minfree )
{
dprintf_local( stddeb, "LocalCompact: %04x\n", minfree );
return LOCAL_Compact( CURRENT_DS, minfree, 0 );
}
/***********************************************************************
* LocalNotify (KERNEL.14)
*/
FARPROC LocalNotify( FARPROC func )
{
dprintf_local( stddeb, "LocalNotify: %08lx\n", func );
return 0;
}
/***********************************************************************
* LocalShrink (KERNEL.121)
*/
WORD LocalShrink( HLOCAL handle, WORD newsize )
{
dprintf_local( stddeb, "LocalShrink: %04x %04x\n", handle, newsize );
return 0;
}
/***********************************************************************
* GetHeapSpaces (KERNEL.138)
*/
DWORD GetHeapSpaces( HMODULE module )
{
return MAKELONG( 0x7fff, 0xffff );
}
/***********************************************************************
* LocalCountFree (KERNEL.161)
*/
void LocalCountFree()
{
dprintf_local( stddeb, "LocalCountFree:\n" );
}
/***********************************************************************
* LocalHeapSize (KERNEL.162)
*/
WORD LocalHeapSize()
{
dprintf_local( stddeb, "LocalHeapSize:\n" );
return LOCAL_HeapSize( CURRENT_DS );
}
/***********************************************************************
* LocalHandleDelta (KERNEL.310)
*/
WORD LocalHandleDelta( WORD delta )
{
dprintf_local( stddeb, "LocalHandleDelta: %04x\n", delta );
return 0;
}
/***********************************************************************
* LocalInfo (TOOLHELP.56)
*/
BOOL LocalInfo( LOCALINFO *pLocalInfo, HGLOBAL handle )
{
LOCALHEAPINFO *pInfo = LOCAL_GetHeap(SELECTOROF(WIN16_GlobalLock(handle)));
if (!pInfo) return FALSE;
pLocalInfo->wcItems = pInfo->items;
return TRUE;
}
/***********************************************************************
* LocalFirst (TOOLHELP.57)
*/
BOOL LocalFirst( LOCALENTRY *pLocalEntry, HGLOBAL handle )
{
WORD ds = SELECTOROF( WIN16_GlobalLock( handle ) );
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
if (!pInfo) return FALSE;
pLocalEntry->hHandle = pInfo->first + ARENA_HEADER_SIZE;
pLocalEntry->wAddress = pLocalEntry->hHandle;
pLocalEntry->wFlags = LF_FIXED;
pLocalEntry->wcLock = 0;
pLocalEntry->wType = LT_NORMAL;
pLocalEntry->hHeap = handle;
pLocalEntry->wHeapType = NORMAL_HEAP;
pLocalEntry->wNext = ARENA_PTR(ptr,pInfo->first)->next;
pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
return TRUE;
}
/***********************************************************************
* LocalNext (TOOLHELP.58)
*/
BOOL LocalNext( LOCALENTRY *pLocalEntry )
{
WORD ds = SELECTOROF( pLocalEntry->hHeap );
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALARENA *pArena;
if (!LOCAL_GetHeap( ds )) return FALSE;
if (!pLocalEntry->wNext) return FALSE;
pArena = ARENA_PTR( ptr, pLocalEntry->wNext );
pLocalEntry->hHandle = pLocalEntry->wNext + ARENA_HEADER_SIZE;
pLocalEntry->wAddress = pLocalEntry->hHandle;
pLocalEntry->wFlags = (pArena->prev & 3) + 1;
pLocalEntry->wcLock = 0;
pLocalEntry->wType = LT_NORMAL;
if (pArena->next != pLocalEntry->wNext) /* last one? */
pLocalEntry->wNext = pArena->next;
else
pLocalEntry->wNext = 0;
pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
return TRUE;
}
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