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Sweden-Number/memory/local.c

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/*
* Local heap functions
*
* Copyright 1995 Alexandre Julliard
* Copyright 1996 Huw Davies
*/
/*
* 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 "global.h"
#include "heap.h"
#include "instance.h"
#include "local.h"
#include "module.h"
#include "stackframe.h"
#include "toolhelp.h"
#include "stddebug.h"
#include "debug.h"
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
/* Layout of a handle entry table
*
* WORD count of entries
* LOCALHANDLEENTRY[count] entries
* WORD near ptr to next table
*/
typedef struct
{
WORD addr; /* Address of the MOVEABLE block */
BYTE flags; /* Flags for this block */
BYTE lock; /* Lock count */
} LOCALHANDLEENTRY;
#pragma pack(1)
typedef struct
{
WORD check; /* 00 Heap checking flag */
WORD freeze; /* 02 Heap frozen flag */
WORD items; /* 04 Count of items on the heap */
WORD first; /* 06 First item of the heap */
WORD pad1; /* 08 Always 0 */
WORD last; /* 0a Last item of the heap */
WORD pad2; /* 0c Always 0 */
BYTE ncompact; /* 0e Compactions counter */
BYTE dislevel; /* 0f Discard level */
DWORD distotal; /* 10 Total bytes discarded */
WORD htable; /* 14 Pointer to handle table */
WORD hfree; /* 16 Pointer to free handle table */
WORD hdelta; /* 18 Delta to expand the handle table */
WORD expand; /* 1a Pointer to expand function (unused) */
WORD pstat; /* 1c Pointer to status structure (unused) */
FARPROC16 notify WINE_PACKED; /* 1e Pointer to LocalNotify() function */
WORD lock; /* 22 Lock count for the heap */
WORD extra; /* 24 Extra bytes to allocate when expanding */
WORD minsize; /* 26 Minimum size of the heap */
WORD magic; /* 28 Magic number */
} LOCALHEAPINFO;
#pragma pack(4)
#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( HANDLE16 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 || !ptr->heap) return NULL;
if (IsBadReadPtr16( (SEGPTR)MAKELONG(ptr->heap,ds), sizeof(LOCALHEAPINFO)))
return NULL;
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 & ~3) | 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( HANDLE16 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)
*/
BOOL16 LocalInit( HANDLE16 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;
if (debugging_heap)
{
/* If debugging_heap is set, the global heap blocks are cleared */
/* before use, so we can test for double initialization. */
if (LOCAL_GetHeap(selector))
{
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 = MODULE_GetPtr( 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 = GlobalSize16( GlobalHandle16( 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( HANDLE16 ds )
{
HANDLE16 hseg = GlobalHandle16( ds );
LONG oldsize = GlobalSize16( hseg );
LONG end;
LOCALHEAPINFO *pHeapInfo;
WORD freeArena, lastArena;
LOCALARENA *pArena, *pLastArena;
char *ptr;
/* if nothing can be gained, return */
if (oldsize > 0xfff0) return;
hseg = GlobalReAlloc16( 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 = GlobalSize16( 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 */
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 */
/* If block before freeArena is also free then merge them */
if((ARENA_PTR(ptr, (pArena->prev & ~3))->prev & 3) == LOCAL_ARENA_FREE)
{
LOCAL_RemoveBlock(ptr, freeArena);
pHeapInfo->items--;
}
dprintf_local( stddeb, "Heap expanded\n" );
LOCAL_PrintHeap( ds );
}
/***********************************************************************
* LOCAL_FreeArena
*/
static HLOCAL16 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 block %04x twice!\n",
arena );
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_ShrinkArena
*
* Shrink an arena by creating a free block at its end if possible.
* 'size' includes the arena header, and must be aligned.
*/
static void LOCAL_ShrinkArena( WORD ds, WORD arena, WORD size )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALARENA *pArena = ARENA_PTR( ptr, arena );
if (arena + size + LALIGN(sizeof(LOCALARENA)) < pArena->next)
{
LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
if (!pInfo) return;
LOCAL_AddBlock( ptr, arena, arena + size );
pInfo->items++;
LOCAL_FreeArena( ds, arena + size );
}
}
/***********************************************************************
* LOCAL_GrowArenaDownward
*
* Grow an arena downward by using the previous arena (must be free).
*/
static void LOCAL_GrowArenaDownward( WORD ds, WORD arena, WORD newsize )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena = ARENA_PTR( ptr, arena );
WORD prevArena = pArena->prev & ~3;
LOCALARENA *pPrevArena = ARENA_PTR( ptr, prevArena );
WORD offset, size;
char *p;
if (!(pInfo = LOCAL_GetHeap( ds ))) return;
offset = pPrevArena->size;
size = pArena->next - arena - ARENA_HEADER_SIZE;
LOCAL_RemoveFreeBlock( ptr, prevArena );
LOCAL_RemoveBlock( ptr, arena );
pInfo->items--;
p = (char *)pPrevArena + ARENA_HEADER_SIZE;
while (offset < size)
{
memcpy( p, p + offset, offset );
p += offset;
size -= offset;
}
if (size) memcpy( p, p + offset, size );
LOCAL_ShrinkArena( ds, prevArena, newsize );
}
/***********************************************************************
* LOCAL_GetFreeSpace
*/
static WORD LOCAL_GetFreeSpace(WORD ds, WORD countdiscard)
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena;
WORD arena;
WORD freespace = 0;
if (!(pInfo = LOCAL_GetHeap( ds )))
{
fprintf( stderr, "LOCAL_GetFreeSpace: 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;
}
/* FIXME doesn't yet calculate space that would become free if everything
were discarded when countdiscard == 1 */
if (freespace < ARENA_HEADER_SIZE) freespace = 0;
else freespace -= ARENA_HEADER_SIZE;
return freespace;
}
/***********************************************************************
* LOCAL_Compact
*/
static WORD LOCAL_Compact( HANDLE16 ds, WORD minfree, WORD flags )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena, *pMoveArena, *pFinalArena;
WORD arena, movearena, finalarena, table;
WORD count, movesize, size;
WORD freespace;
LOCALHANDLEENTRY *pEntry;
if (!(pInfo = LOCAL_GetHeap( ds )))
{
fprintf( stderr, "Local_Compact: Local heap not found\n" );
LOCAL_PrintHeap(ds);
return 0;
}
dprintf_local(stddeb,
"LOCAL_Compact: ds = %04x, minfree = %04x, flags = %04x\n",
ds, minfree, flags);
freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
if(freespace >= minfree || (flags & LMEM_NOCOMPACT))
{
dprintf_local(stddeb, "Returning %04x.\n", freespace);
return freespace;
}
dprintf_local(stddeb, "Local_Compact: Compacting heap %04x.\n", ds);
table = pInfo->htable;
while(table)
{
pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
{
if((pEntry->lock == 0) && !(pEntry->flags &
(LMEM_DISCARDED >> 8)))
{
/* OK we can move this one if we want */
dprintf_local(stddeb,
"handle %04x (block %04x) can be moved.\n",
(WORD)((char *)pEntry - ptr), pEntry->addr);
movearena = ARENA_HEADER(pEntry->addr);
pMoveArena = ARENA_PTR(ptr, movearena);
movesize = pMoveArena->next - movearena;
arena = pInfo->first;
pArena = ARENA_PTR(ptr, arena);
size = 0xffff;
finalarena = 0;
/* Try to find the smallest arena that will do, */
/* which is below us in memory */
for(;;)
{
arena = pArena->free_next;
pArena = ARENA_PTR(ptr, arena);
if(arena >= movearena)
break;
if(arena == pArena->free_next)
break;
if((pArena->size >= movesize) && (pArena->size < size))
{
size = pArena->size;
finalarena = arena;
}
}
if (finalarena) /* Actually got somewhere to move */
{
dprintf_local(stddeb, "Moving it to %04x.\n", finalarena);
pFinalArena = ARENA_PTR(ptr, finalarena);
size = pFinalArena->size;
LOCAL_RemoveFreeBlock(ptr, finalarena);
LOCAL_ShrinkArena( ds, finalarena, movesize );
/* Copy the arena to it's new location */
memcpy((char *)pFinalArena + ARENA_HEADER_SIZE,
(char *)pMoveArena + ARENA_HEADER_SIZE,
movesize - ARENA_HEADER_SIZE );
/* Free the old location */
LOCAL_FreeArena(ds, movearena);
/* Update handle table entry */
pEntry->addr = finalarena + ARENA_HEADER_SIZE;
}
else if((ARENA_PTR(ptr, pMoveArena->prev & ~3)->prev & 3)
== LOCAL_ARENA_FREE)
{
/* Previous arena is free (but < movesize) */
/* so we can 'slide' movearena down into it */
finalarena = pMoveArena->prev & ~3;
LOCAL_GrowArenaDownward( ds, movearena, movesize );
/* Update handle table entry */
pEntry->addr = finalarena + ARENA_HEADER_SIZE;
}
}
}
table = *(WORD *)pEntry;
}
freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
if(freespace >= minfree || (flags & LMEM_NODISCARD))
{
dprintf_local(stddeb, "Returning %04x.\n", freespace);
return freespace;
}
table = pInfo->htable;
while(table)
{
pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
for(count = *(WORD *)(ptr + table); count > 0; count--, pEntry++)
{
if((pEntry->flags & (LMEM_DISCARDABLE >> 8)) &&
pEntry->lock == 0 && !(pEntry->flags & (LMEM_DISCARDED >> 8)))
{
dprintf_local(stddeb, "Discarding handle %04x (block %04x).\n",
(char *)pEntry - ptr, pEntry->addr);
LOCAL_FreeArena(ds, pEntry->addr);
pEntry->addr = 0;
pEntry->flags |= (LMEM_DISCARDED >> 8);
/* Call localnotify proc */
}
}
table = *(WORD *)pEntry;
}
return LOCAL_Compact(ds, 0xffff, LMEM_NODISCARD);
}
/***********************************************************************
* LOCAL_FindFreeBlock
*/
static HLOCAL16 LOCAL_FindFreeBlock( HANDLE16 ds, WORD size )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena;
WORD arena;
if (!(pInfo = LOCAL_GetHeap( ds )))
{
fprintf( stderr, "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 HLOCAL16 LOCAL_GetBlock( HANDLE16 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 )))
{
fprintf( stderr, "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 in heap %04x for %d bytes\n",
ds, size );
return 0;
}
/* Make a block out of the free arena */
pArena = ARENA_PTR( ptr, arena );
dprintf_local(stddeb, "LOCAL_GetBlock size = %04x, arena %04x size %04x\n",
size, arena, pArena->size );
LOCAL_RemoveFreeBlock( ptr, arena );
LOCAL_ShrinkArena( ds, arena, size );
if (flags & LMEM_ZEROINIT) memset( (char *)pArena + ARENA_HEADER_SIZE, 0,
size - ARENA_HEADER_SIZE );
return arena + ARENA_HEADER_SIZE;
}
/***********************************************************************
* LOCAL_NewHTable
*/
static BOOL16 LOCAL_NewHTable( HANDLE16 ds )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALHANDLEENTRY *pEntry;
HLOCAL16 handle;
int i;
dprintf_local( stddeb, "Local_NewHTable\n" );
if (!(pInfo = LOCAL_GetHeap( ds )))
{
fprintf( stderr, "Local heap not found\n");
LOCAL_PrintHeap(ds);
return FALSE;
}
if (!(handle = LOCAL_GetBlock( ds, pInfo->hdelta * sizeof(LOCALHANDLEENTRY)
+ 2 * sizeof(WORD), LMEM_FIXED )))
return FALSE;
if (!(ptr = PTR_SEG_OFF_TO_LIN( ds, 0 )))
fprintf(stderr, "LOCAL_NewHTable: ptr == NULL after GetBlock.\n");
if (!(pInfo = LOCAL_GetHeap( ds )))
fprintf(stderr,"LOCAL_NewHTable: pInfo == NULL after GetBlock.\n");
/* Fill the entry table */
*(WORD *)(ptr + handle) = pInfo->hdelta;
pEntry = (LOCALHANDLEENTRY *)(ptr + handle + sizeof(WORD));
for (i = pInfo->hdelta; i > 0; i--) (pEntry++)->lock = 0xff;
*(WORD *)pEntry = pInfo->htable;
pInfo->htable = handle;
return TRUE;
}
/***********************************************************************
* LOCAL_GetNewHandleEntry
*/
static HLOCAL16 LOCAL_GetNewHandleEntry( HANDLE16 ds )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALHANDLEENTRY *pEntry = NULL;
WORD table;
if (!(pInfo = LOCAL_GetHeap( ds )))
{
fprintf( stderr, "LOCAL_GetNewHandleEntry: Local heap not found\n");
LOCAL_PrintHeap(ds);
return 0;
}
/* Find a free slot in existing tables */
table = pInfo->htable;
while (table)
{
WORD count = *(WORD *)(ptr + table);
pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
for (; count > 0; count--, pEntry++)
if (pEntry->lock == 0xff) break;
if (count) break;
table = *(WORD *)pEntry;
}
if (!table) /* We need to create a new table */
{
if (!LOCAL_NewHTable( ds )) return 0;
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pInfo = LOCAL_GetHeap( ds );
pEntry = (LOCALHANDLEENTRY *)(ptr + pInfo->htable + sizeof(WORD));
}
/* Now allocate this entry */
pEntry->lock = 0;
dprintf_local( stddeb, "LOCAL_GetNewHandleEntry(%04x): %04x\n",
ds, ((char *)pEntry - ptr) );
return (HLOCAL16)((char *)pEntry - ptr);
}
/***********************************************************************
* LOCAL_FreeHandleEntry
*
* Free a handle table entry.
*/
static void LOCAL_FreeHandleEntry( HANDLE16 ds, HLOCAL16 handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
LOCALHEAPINFO *pInfo;
WORD *pTable;
WORD table, count, i;
if (!(pInfo = LOCAL_GetHeap( ds ))) return;
/* Find the table where this handle comes from */
pTable = &pInfo->htable;
while (*pTable)
{
WORD size = (*(WORD *)(ptr + *pTable)) * sizeof(LOCALHANDLEENTRY);
if ((handle >= *pTable + sizeof(WORD)) &&
(handle < *pTable + sizeof(WORD) + size)) break; /* Found it */
pTable = (WORD *)(ptr + *pTable + sizeof(WORD) + size);
}
if (!*pTable)
{
fprintf(stderr, "LOCAL_FreeHandleEntry: invalid entry %04x\n", handle);
LOCAL_PrintHeap( ds );
return;
}
/* Make the entry free */
pEntry->addr = 0; /* just in case */
pEntry->lock = 0xff;
/* Now check if all entries in this table are free */
table = *pTable;
pEntry = (LOCALHANDLEENTRY *)(ptr + table + sizeof(WORD));
count = *(WORD *)(ptr + table);
for (i = count; i > 0; i--, pEntry++) if (pEntry->lock != 0xff) return;
/* Remove the table from the linked list and free it */
dprintf_local( stddeb, "LOCAL_FreeHandleEntry(%04x): freeing table %04x\n",
ds, table);
*pTable = *(WORD *)pEntry;
LOCAL_FreeArena( ds, ARENA_HEADER( table ) );
}
/***********************************************************************
* LOCAL_Free
*
* Implementation of LocalFree().
*/
HLOCAL16 LOCAL_Free( HANDLE16 ds, HLOCAL16 handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
dprintf_local( stddeb, "LocalFree: %04x ds=%04x\n", handle, ds );
if (!handle) { fprintf( stderr, "LOCAL_Free: handle is 0.\n" ); return 0; }
if (HANDLE_FIXED( handle ))
{
if (!LOCAL_FreeArena( ds, ARENA_HEADER( handle ) )) return 0; /* OK */
else return handle; /* couldn't free it */
}
else
{
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
if (!(pEntry->flags & (LMEM_DISCARDED >> 8)))
{
dprintf_local( stddeb, "LocalFree: real block at %04x\n",
pEntry->addr );
if (LOCAL_FreeArena( ds, ARENA_HEADER(pEntry->addr) ))
return handle; /* couldn't free it */
}
LOCAL_FreeHandleEntry( ds, handle );
return 0; /* OK */
}
}
/***********************************************************************
* LOCAL_Alloc
*
* Implementation of LocalAlloc().
*/
HLOCAL16 LOCAL_Alloc( HANDLE16 ds, WORD flags, WORD size )
{
char *ptr;
HLOCAL16 handle;
dprintf_local( stddeb, "LocalAlloc: %04x %d ds=%04x\n", flags, size, ds );
if (flags & LMEM_MOVEABLE)
{
LOCALHANDLEENTRY *plhe;
HLOCAL16 hmem;
if (!(hmem = LOCAL_GetBlock( ds, size, flags ))) return 0;
if (!(handle = LOCAL_GetNewHandleEntry( ds )))
{
fprintf( stderr, "LocalAlloc: couldn't get handle\n");
LOCAL_FreeArena( ds, ARENA_HEADER(hmem) );
return 0;
}
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
plhe = (LOCALHANDLEENTRY *)(ptr + handle);
plhe->addr = hmem;
plhe->flags = (BYTE)(flags >> 8);
plhe->lock = 0;
}
else handle = LOCAL_GetBlock( ds, size, flags );
return handle;
}
/***********************************************************************
* LOCAL_ReAlloc
*
* Implementation of LocalReAlloc().
*/
HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena, *pNext;
LOCALHANDLEENTRY *pEntry;
WORD arena, newhandle, blockhandle, oldsize;
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
{
pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
if(pEntry->flags & (LMEM_DISCARDED >> 8))
{
dprintf_local(stddeb, "ReAllocating discarded block\n");
if (!(pEntry->addr = LOCAL_GetBlock( ds, size, flags))) return 0;
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
pEntry->flags = (BYTE) (flags >> 8);
pEntry->lock = 0;
return handle;
}
if (!(blockhandle = pEntry->addr))
{
fprintf( stderr, "Local_ReAlloc(%04x,%04x): invalid handle\n",
ds, handle );
return 0;
}
}
arena = ARENA_HEADER( blockhandle );
dprintf_local( stddeb, "LocalReAlloc: arena is %04x\n", arena );
pArena = ARENA_PTR( ptr, arena );
if ((flags & LMEM_MODIFY) && (flags & LMEM_DISCARDABLE))
{
if (HANDLE_FIXED(handle))
{
fprintf(stderr,"LocalReAlloc: LMEM_MODIFY & LMEM_DISCARDABLE on a fixed handle.\n");
return handle;
}
dprintf_local( stddeb, "Making block discardable.\n" );
pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
pEntry->flags |= (LMEM_DISCARDABLE >> 8);
return handle;
}
if ((flags & LMEM_MODIFY) || (flags & LMEM_DISCARDABLE))
{
fprintf(stderr,"LocalReAlloc: flags %04x. MODIFY & DISCARDABLE should both be set\n", flags);
return handle;
}
if (!size)
{
if (HANDLE_FIXED(handle))
{
if (flags & LMEM_MOVEABLE)
{
dprintf_local(stddeb, "Freeing fixed block.\n");
return LOCAL_Free( ds, handle );
}
else size = 1;
}
else
{
pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
if (pEntry->lock == 0)
{
/* discards moveable blocks is this right? */
dprintf_local(stddeb,"Discarding block\n");
LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr));
pEntry->addr = 0;
pEntry->flags = (LMEM_DISCARDED >> 8);
return 0;
}
return handle;
}
}
size = LALIGN( size );
oldsize = pArena->next - arena - ARENA_HEADER_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 );
pInfo->items++;
LOCAL_FreeArena( ds, nextarena );
}
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 );
pInfo->items++;
LOCAL_FreeArena( ds, nextarena );
}
dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", handle );
return handle;
}
/* Now we have to allocate a new block, but not if fixed block and no
LMEM_MOVEABLE */
if (HANDLE_FIXED(handle) && !(flags & LMEM_MOVEABLE))
{
dprintf_local(stddeb, "Needed to move fixed block, but LMEM_MOVEABLE not specified.\n");
return 0; /* FIXME: should we free it here? */
}
newhandle = LOCAL_GetBlock( ds, size, flags );
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
if (!newhandle)
{
/* Remove the block from the heap and try again */
LPSTR buffer = HeapAlloc( SystemHeap, 0, oldsize );
if (!buffer) return 0;
memcpy( buffer, ptr + (arena + ARENA_HEADER_SIZE), oldsize );
LOCAL_FreeArena( ds, arena );
if (!(newhandle = LOCAL_GetBlock( ds, size, flags )))
{
if (!(newhandle = LOCAL_GetBlock( ds, oldsize, flags )))
{
fprintf( stderr, "LocalRealloc: can't restore saved block\n" );
HeapFree( SystemHeap, 0, buffer );
return 0;
}
size = oldsize;
}
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
memcpy( ptr + newhandle, buffer, oldsize );
HeapFree( SystemHeap, 0, buffer );
}
else
{
memcpy( ptr + newhandle, ptr + (arena + ARENA_HEADER_SIZE), oldsize );
LOCAL_FreeArena( ds, arena );
}
if (HANDLE_MOVEABLE( handle ))
{
dprintf_local( stddeb, "LocalReAlloc: fixing handle\n");
pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
pEntry->addr = newhandle;
pEntry->lock = 0;
newhandle = handle;
}
if (size == oldsize) newhandle = 0; /* Realloc failed */
dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", newhandle );
return newhandle;
}
/***********************************************************************
* LOCAL_InternalLock
*/
static HLOCAL16 LOCAL_InternalLock( LPSTR heap, HLOCAL16 handle )
{
dprintf_local( stddeb, "LocalLock: %04x ", handle );
if (HANDLE_MOVEABLE(handle))
{
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(heap + handle);
if (pEntry->lock < 0xfe) pEntry->lock++;
handle = pEntry->addr;
}
dprintf_local( stddeb, "returning %04x\n", handle );
return handle;
}
/***********************************************************************
* LOCAL_Lock
*/
LPSTR LOCAL_Lock( HANDLE16 ds, HLOCAL16 handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
return handle ? ptr + LOCAL_InternalLock( ptr, handle ) : NULL;
}
/***********************************************************************
* LOCAL_LockSegptr
*/
SEGPTR LOCAL_LockSegptr( HANDLE16 ds, HLOCAL16 handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
return PTR_SEG_OFF_TO_SEGPTR( ds, LOCAL_InternalLock( ptr, handle ) );
}
/***********************************************************************
* LOCAL_Unlock
*/
BOOL16 LOCAL_Unlock( HANDLE16 ds, HLOCAL16 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 == 0xff)) 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( HANDLE16 ds, HLOCAL16 handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( CURRENT_DS, 0 );
LOCALARENA *pArena;
dprintf_local( stddeb, "LocalSize: %04x ds=%04x\n", handle, ds );
if (HANDLE_MOVEABLE( handle )) handle = *(WORD *)(ptr + handle);
pArena = ARENA_PTR( ptr, ARENA_HEADER(handle) );
return pArena->next - handle;
}
/***********************************************************************
* LOCAL_Flags
*
* Implementation of LocalFlags().
*/
WORD LOCAL_Flags( HANDLE16 ds, HLOCAL16 handle )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
if (HANDLE_MOVEABLE(handle))
{
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
dprintf_local( stddeb, "LOCAL_Flags(%04x,%04x): returning %04x\n",
ds, handle, pEntry->lock | (pEntry->flags << 8) );
return pEntry->lock | (pEntry->flags << 8);
}
else
{
dprintf_local( stddeb, "LOCAL_Flags(%04x,%04x): returning 0\n",
ds, handle );
return 0;
}
}
/***********************************************************************
* LOCAL_HeapSize
*
* Implementation of LocalHeapSize().
*/
WORD LOCAL_HeapSize( HANDLE16 ds )
{
LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
if (!pInfo) return 0;
return pInfo->last - pInfo->first;
}
/***********************************************************************
* LOCAL_CountFree
*
* Implementation of LocalCountFree().
*/
WORD LOCAL_CountFree( HANDLE16 ds )
{
WORD arena, total;
LOCALARENA *pArena;
LOCALHEAPINFO *pInfo;
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
if (!(pInfo = LOCAL_GetHeap( ds )))
{
fprintf( stderr, "LOCAL_Handle(%04x): Local heap not found\n", ds );
LOCAL_PrintHeap( ds );
return 0;
}
total = 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;
total += pArena->size;
}
dprintf_local( stddeb, "LOCAL_CountFree(%04x): returning %d\n", ds, total);
return total;
}
/***********************************************************************
* LOCAL_Handle
*
* Implementation of LocalHandle().
*/
HLOCAL16 LOCAL_Handle( HANDLE16 ds, WORD addr )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
WORD table;
if (!(pInfo = LOCAL_GetHeap( ds )))
{
fprintf( stderr, "LOCAL_Handle(%04x): Local heap not found\n", ds );
LOCAL_PrintHeap( ds );
return 0;
}
/* Find the address in the entry tables */
table = pInfo->htable;
while (table)
{
WORD count = *(WORD *)(ptr + table);
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY*)(ptr+table+sizeof(WORD));
for (; count > 0; count--, pEntry++)
if (pEntry->addr == addr) return (HLOCAL16)((char *)pEntry - ptr);
table = *(WORD *)pEntry;
}
return (HLOCAL16)addr; /* Fixed block handle is addr */
}
/***********************************************************************
* LocalAlloc16 (KERNEL.5)
*/
HLOCAL16 LocalAlloc16( UINT16 flags, WORD size )
{
return LOCAL_Alloc( CURRENT_DS, flags, size );
}
/***********************************************************************
* LocalReAlloc16 (KERNEL.6)
*/
HLOCAL16 LocalReAlloc16( HLOCAL16 handle, WORD size, UINT16 flags )
{
return LOCAL_ReAlloc( CURRENT_DS, handle, size, flags );
}
/***********************************************************************
* LocalFree16 (KERNEL.7)
*/
HLOCAL16 LocalFree16( HLOCAL16 handle )
{
return LOCAL_Free( CURRENT_DS, handle );
}
/***********************************************************************
* LocalLock16 (KERNEL.8)
*
* Note: only the offset part of the pointer is returned by the relay code.
*/
SEGPTR LocalLock16( HLOCAL16 handle )
{
return LOCAL_LockSegptr( CURRENT_DS, handle );
}
/***********************************************************************
* LocalUnlock16 (KERNEL.9)
*/
BOOL16 LocalUnlock16( HLOCAL16 handle )
{
return LOCAL_Unlock( CURRENT_DS, handle );
}
/***********************************************************************
* LocalSize16 (KERNEL.10)
*/
UINT16 LocalSize16( HLOCAL16 handle )
{
return LOCAL_Size( CURRENT_DS, handle );
}
/***********************************************************************
* LocalHandle16 (KERNEL.11)
*/
HLOCAL16 LocalHandle16( WORD addr )
{
return LOCAL_Handle( CURRENT_DS, addr );
}
/***********************************************************************
* LocalFlags16 (KERNEL.12)
*/
UINT16 LocalFlags16( HLOCAL16 handle )
{
return LOCAL_Flags( CURRENT_DS, handle );
}
/***********************************************************************
* LocalCompact16 (KERNEL.13)
*/
UINT16 LocalCompact16( UINT16 minfree )
{
dprintf_local( stddeb, "LocalCompact: %04x\n", minfree );
return LOCAL_Compact( CURRENT_DS, minfree, 0 );
}
/***********************************************************************
* LocalNotify (KERNEL.14)
*/
FARPROC16 LocalNotify( FARPROC16 func )
{
LOCALHEAPINFO *pInfo;
FARPROC16 oldNotify;
HANDLE16 ds = CURRENT_DS;
if (!(pInfo = LOCAL_GetHeap( ds )))
{
fprintf( stderr, "LOCAL_Notify(%04x): Local heap not found\n", ds );
LOCAL_PrintHeap( ds );
return 0;
}
dprintf_local( stddeb, "LocalNotify(%04x): %08lx\n", ds, (DWORD)func );
oldNotify = pInfo->notify;
pInfo->notify = func;
return oldNotify;
}
/***********************************************************************
* LocalShrink16 (KERNEL.121)
*/
UINT16 LocalShrink16( HGLOBAL16 handle, UINT16 newsize )
{
dprintf_local( stddeb, "LocalShrink: %04x %04x\n", handle, newsize );
return 0;
}
/***********************************************************************
* GetHeapSpaces (KERNEL.138)
*/
DWORD GetHeapSpaces( HMODULE16 module )
{
NE_MODULE *pModule;
WORD ds;
module = GetExePtr( module );
if (!(pModule = MODULE_GetPtr( module ))) return 0;
ds = (NE_SEG_TABLE( pModule ) + pModule->dgroup - 1)->selector;
return MAKELONG( LOCAL_CountFree( ds ), LOCAL_HeapSize( ds ) );
}
/***********************************************************************
* LocalCountFree (KERNEL.161)
*/
WORD LocalCountFree(void)
{
return LOCAL_CountFree( CURRENT_DS );
}
/***********************************************************************
* LocalHeapSize (KERNEL.162)
*/
WORD LocalHeapSize()
{
dprintf_local( stddeb, "LocalHeapSize:\n" );
return LOCAL_HeapSize( CURRENT_DS );
}
/***********************************************************************
* LocalHandleDelta (KERNEL.310)
*/
WORD LocalHandleDelta( WORD delta )
{
LOCALHEAPINFO *pInfo;
if (!(pInfo = LOCAL_GetHeap( CURRENT_DS )))
{
fprintf( stderr, "LocalHandleDelta: Local heap not found\n");
LOCAL_PrintHeap( CURRENT_DS );
return 0;
}
if (delta) pInfo->hdelta = delta;
dprintf_local(stddeb, "LocalHandleDelta: returning %04x\n", pInfo->hdelta);
return pInfo->hdelta;
}
/***********************************************************************
* LocalInfo (TOOLHELP.56)
*/
BOOL16 LocalInfo( LOCALINFO *pLocalInfo, HGLOBAL16 handle )
{
LOCALHEAPINFO *pInfo = LOCAL_GetHeap(SELECTOROF(WIN16_GlobalLock16(handle)));
if (!pInfo) return FALSE;
pLocalInfo->wcItems = pInfo->items;
return TRUE;
}
/***********************************************************************
* LocalFirst (TOOLHELP.57)
*/
BOOL16 LocalFirst( LOCALENTRY *pLocalEntry, HGLOBAL16 handle )
{
WORD ds = GlobalHandleToSel( 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)
*/
BOOL16 LocalNext( LOCALENTRY *pLocalEntry )
{
WORD ds = GlobalHandleToSel( 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;
}
/***********************************************************************
* LocalAlloc32 (KERNEL32.371)
*/
HLOCAL32 LocalAlloc32( UINT32 flags, DWORD size )
{
return (HLOCAL32)GlobalAlloc32( flags, size );
}
/***********************************************************************
* LocalCompact32 (KERNEL32.372)
*/
UINT32 LocalCompact32( UINT32 minfree )
{
return 0; /* LocalCompact does nothing in Win32 */
}
/***********************************************************************
* LocalFlags32 (KERNEL32.374)
*/
UINT32 LocalFlags32( HLOCAL32 handle )
{
return GlobalFlags32( (HGLOBAL32)handle );
}
/***********************************************************************
* LocalFree32 (KERNEL32.375)
*/
HLOCAL32 LocalFree32( HLOCAL32 handle )
{
return (HLOCAL32)GlobalFree32( (HGLOBAL32)handle );
}
/***********************************************************************
* LocalHandle32 (KERNEL32.376)
*/
HLOCAL32 LocalHandle32( LPCVOID ptr )
{
return (HLOCAL32)GlobalHandle32( ptr );
}
/***********************************************************************
* LocalLock32 (KERNEL32.377)
*/
LPVOID LocalLock32( HLOCAL32 handle )
{
return GlobalLock32( (HGLOBAL32)handle );
}
/***********************************************************************
* LocalReAlloc32 (KERNEL32.378)
*/
HLOCAL32 LocalReAlloc32( HLOCAL32 handle, DWORD size, UINT32 flags )
{
return (HLOCAL32)GlobalReAlloc32( (HGLOBAL32)handle, size, flags );
}
/***********************************************************************
* LocalShrink32 (KERNEL32.379)
*/
UINT32 LocalShrink32( HGLOBAL32 handle, UINT32 newsize )
{
return 0; /* LocalShrink does nothing in Win32 */
}
/***********************************************************************
* LocalSize32 (KERNEL32.380)
*/
UINT32 LocalSize32( HLOCAL32 handle )
{
return GlobalSize32( (HGLOBAL32)handle );
}
/***********************************************************************
* LocalUnlock32 (KERNEL32.381)
*/
BOOL32 LocalUnlock32( HLOCAL32 handle )
{
return GlobalUnlock32( (HGLOBAL32)handle );
}
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