ReceiveTempSMS/Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
Sweden-Number/memory/local.c
Alexandre Julliard 4220b29be9 Take advantage of the new registers saved in the STACK16FRAME to turn 
some 'register' functions into normal functions.
Removed the few remaining 'return' functions to simplify relay
handling.
1999-07-11 17:20:01 +00:00

1910 lines
56 KiB
C
Raw Blame History

/*
* 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 "wine/winbase16.h"
#include "ldt.h"
#include "task.h"
#include "global.h"
#include "heap.h"
#include "instance.h"
#include "local.h"
#include "module.h"
#include "stackframe.h"
#include "toolhelp.h"
#include "debugtools.h"
#include "callback.h"
DECLARE_DEBUG_CHANNEL(heap)
DECLARE_DEBUG_CHANNEL(local)
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
/* LocalNotify() msgs */
#define LN_OUTOFMEM 0
#define LN_MOVE 1
#define LN_DISCARD 2
/* 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;
/*
* We make addr = 4n + 2 and set *((WORD *)addr - 1) = &addr like Windows does
* in case something actually relies on this.
* Note the ARENA_HEADER(addr) still produces the desired result ie. 4n - 4
*
* An unused handle has lock = flags = 0xff. In windows addr is that of next
* free handle, at the moment in wine we set it to 0.
*
* A discarded block's handle has lock = addr = 0 and flags = 0x40
* (LMEM_DISCARDED >> 8)
*/
#include "pshpack1.h"
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;
#include "poppack.h"
#define LOCAL_HEAP_MAGIC 0x484c /* 'LH' */
WORD USER_HeapSel = 0; /* USER heap selector */
WORD GDI_HeapSel = 0; /* GDI heap selector */
/* 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 );
TRACE_(local)("Heap at %p, %04x\n", ptr, (ptr != NULL ? ptr->heap : 0xFFFF));
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;
}
TRACE_(local)("Local_MakeBlockFree %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 */
TRACE_(local)("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;
LOCALHEAPINFO *pInfo;
WORD arena;
/* FIXME - the test should be done when calling the function!
plus is not clear that we should print this info
only when TRACE_ON is on! */
if(!TRACE_ON(local)) return;
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pInfo = LOCAL_GetHeap( ds );
if (!pInfo)
{
DPRINTF( "Local Heap corrupted! ds=%04x\n", ds );
return;
}
DPRINTF( "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);
DPRINTF( " %04x: prev=%04x next=%04x type=%d\n", arena,
pArena->prev & ~3, pArena->next, pArena->prev & 3 );
if (arena == pInfo->first)
{
DPRINTF( " size=%d free_prev=%04x free_next=%04x\n",
pArena->size, pArena->free_prev, pArena->free_next );
}
if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
{
DPRINTF( " 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)
{
DPRINTF( "*** arena->free_next->free_prev != arena\n" );
break;
}
}
if (pArena->next == arena)
{
DPRINTF( "*** last block is not marked free\n" );
break;
}
if ((ARENA_PTR(ptr,pArena->next)->prev & ~3) != arena)
{
DPRINTF( "*** arena->next->prev != arena (%04x, %04x)\n",
pArena->next, ARENA_PTR(ptr,pArena->next)->prev);
break;
}
arena = pArena->next;
}
}
/***********************************************************************
* LocalInit (KERNEL.4)
*/
BOOL16 WINAPI LocalInit16( HANDLE16 selector, WORD start, WORD end )
{
char *ptr;
WORD heapInfoArena, freeArena, lastArena;
LOCALHEAPINFO *pHeapInfo;
LOCALARENA *pArena, *pFirstArena, *pLastArena;
NE_MODULE *pModule;
BOOL16 ret = FALSE;
/* The initial layout of the heap is: */
/* - first arena (FIXED) */
/* - heap info structure (FIXED) */
/* - large free block (FREE) */
/* - last arena (FREE) */
TRACE_(local)("%04x %04x-%04x\n", selector, start, end);
if (!selector) selector = CURRENT_DS;
if (TRACE_ON(heap))
{
/* If TRACE_ON(heap) is set, the global heap blocks are */
/* cleared before use, so we can test for double initialization. */
if (LOCAL_GetHeap(selector))
{
ERR_(local)("Heap %04x initialized twice.\n", selector);
LOCAL_PrintHeap(selector);
}
}
if (start == 0)
{
/* start == 0 means: put the local heap at the end of the segment */
DWORD size = GlobalSize16( GlobalHandle16( selector ) );
start = (WORD)(size > 0xffff ? 0xffff : size) - 1;
if ( end > 0xfffe ) end = 0xfffe;
start -= end;
end += start;
/* Paranoid check */
if ((pModule = NE_GetPtr( GlobalHandle16( selector ) )))
{
SEGTABLEENTRY *pSeg = NE_SEG_TABLE( pModule );
int segNr;
for ( segNr = 0; segNr < pModule->seg_count; segNr++, pSeg++ )
if ( GlobalHandleToSel16(pSeg->hSeg) == selector )
break;
if ( segNr < pModule->seg_count )
{
WORD minsize = pSeg->minsize;
if ( pModule->ss == segNr+1 )
minsize += pModule->stack_size;
TRACE_(local)(" new start %04x, minstart: %04x\n", start, minsize);
}
}
}
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) goto done;
/* 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 );
ret = TRUE;
done:
CURRENT_STACK16->ecx = ret; /* must be returned in cx too */
return ret;
}
/***********************************************************************
* LOCAL_GrowHeap
*/
static BOOL16 LOCAL_GrowHeap( HANDLE16 ds )
{
HANDLE16 hseg;
LONG oldsize;
LONG end;
LOCALHEAPINFO *pHeapInfo;
WORD freeArena, lastArena;
LOCALARENA *pArena, *pLastArena;
char *ptr;
hseg = GlobalHandle16( ds );
/* maybe mem allocated by Virtual*() ? */
if (!hseg) return FALSE;
oldsize = GlobalSize16( hseg );
/* if nothing can be gained, return */
if (oldsize > 0xfff0) return FALSE;
hseg = GlobalReAlloc16( hseg, 0x10000, GMEM_FIXED );
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pHeapInfo = LOCAL_GetHeap( ds );
if (pHeapInfo == NULL) {
ERR_(local)("Heap not found\n" );
return FALSE;
}
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--;
}
TRACE_(local)("Heap expanded\n" );
LOCAL_PrintHeap( ds );
return TRUE;
}
/***********************************************************************
* 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;
TRACE_(local)("%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 */
ERR_(local)("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_GrowArenaUpward
*
* Grow an arena upward by using the next arena (must be free and big
* enough). Newsize includes the arena header and must be aligned.
*/
static void LOCAL_GrowArenaUpward( WORD ds, WORD arena, WORD newsize )
{
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
LOCALHEAPINFO *pInfo;
LOCALARENA *pArena = ARENA_PTR( ptr, arena );
WORD nextArena = pArena->next;
if (!(pInfo = LOCAL_GetHeap( ds ))) return;
LOCAL_RemoveBlock( ptr, nextArena );
pInfo->items--;
LOCAL_ShrinkArena( ds, arena, 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 )))
{
ERR_(local)("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
*/
WORD LOCAL_Compact( HANDLE16 ds, UINT16 minfree, UINT16 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 )))
{
ERR_(local)("Local heap not found\n" );
LOCAL_PrintHeap(ds);
return 0;
}
TRACE_(local)("ds = %04x, minfree = %04x, flags = %04x\n",
ds, minfree, flags);
freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
if(freespace >= minfree || (flags & LMEM_NOCOMPACT))
{
TRACE_(local)("Returning %04x.\n", freespace);
return freespace;
}
TRACE_(local)("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 */
TRACE_(local)("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 */
{
TRACE_(local)("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);
if (pInfo->notify)
Callbacks->CallLocalNotifyFunc(pInfo->notify, LN_MOVE,
(WORD)((char *)pEntry - ptr), pEntry->addr);
/* Update handle table entry */
pEntry->addr = finalarena + ARENA_HEADER_SIZE + sizeof(HLOCAL16) ;
}
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 + sizeof(HLOCAL16) ;
}
}
}
table = *(WORD *)pEntry;
}
freespace = LOCAL_GetFreeSpace(ds, minfree ? 0 : 1);
if(freespace >= minfree || (flags & LMEM_NODISCARD))
{
TRACE_(local)("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->addr && pEntry->lock == 0 &&
(pEntry->flags & (LMEM_DISCARDABLE >> 8)))
{
TRACE_(local)("Discarding handle %04x (block %04x).\n",
(char *)pEntry - ptr, pEntry->addr);
LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr));
if (pInfo->notify)
Callbacks->CallLocalNotifyFunc(pInfo->notify, LN_DISCARD,
(char *)pEntry - ptr, pEntry->flags);
pEntry->addr = 0;
pEntry->flags = (LMEM_DISCARDED >> 8);
}
}
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 )))
{
ERR_(local)("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;
}
TRACE_(local)("not enough space\n" );
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 )))
{
ERR_(local)("Local heap not found\n");
LOCAL_PrintHeap(ds);
return 0;
}
size += ARENA_HEADER_SIZE;
size = LALIGN( MAX( size, sizeof(LOCALARENA) ) );
#if 0
notify_done:
#endif
/* 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 */
if (!(LOCAL_GrowHeap( ds )))
{
#if 0
/* FIXME: doesn't work correctly yet */
if ((pInfo->notify) && (Callbacks->CallLocalNotifyFunc(pInfo->notify, LN_OUTOFMEM, ds - 20, size))) /* FIXME: "size" correct ? (should indicate bytes needed) */
goto notify_done;
#endif
return 0;
}
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
pInfo = LOCAL_GetHeap( ds );
arena = LOCAL_FindFreeBlock( ds, size );
}
if (arena == 0) {
if (ds == GDI_HeapSel) {
ERR_(local)("not enough space in GDI local heap "
"(%04x) for %d bytes\n", ds, size );
} else if (ds == USER_HeapSel) {
ERR_(local)("not enough space in USER local heap "
"(%04x) for %d bytes\n", ds, size );
} else {
ERR_(local)("not enough space in local heap "
"%04x for %d bytes\n", ds, size );
}
#if 0
if ((pInfo->notify) &&
/* FIXME: "size" correct ? (should indicate bytes needed) */
(Callbacks->CallLocalNotifyFunc(pInfo->notify, LN_OUTOFMEM, ds, size)))
goto notify_done;
#endif
return 0;
}
/* Make a block out of the free arena */
pArena = ARENA_PTR( ptr, arena );
TRACE_(local)("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;
TRACE_(local)("Local_NewHTable\n" );
if (!(pInfo = LOCAL_GetHeap( ds )))
{
ERR_(local)("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 )))
ERR_(local)("ptr == NULL after GetBlock.\n");
if (!(pInfo = LOCAL_GetHeap( ds )))
ERR_(local)("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++) {
pEntry->lock = pEntry->flags = 0xff;
pEntry->addr = 0;
}
*(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 )))
{
ERR_(local)("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;
pEntry->flags = 0;
TRACE_(local)("(%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)
{
ERR_(local)("Invalid entry %04x\n", handle);
LOCAL_PrintHeap( ds );
return;
}
/* Make the entry free */
pEntry->addr = 0; /* just in case */
pEntry->lock = 0xff;
pEntry->flags = 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 */
TRACE_(local)("(%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 );
TRACE_(local)("%04x ds=%04x\n", handle, ds );
if (!handle) { WARN_(local)("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))
{
TRACE_(local)("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;
TRACE_(local)("%04x %d ds=%04x\n", flags, size, ds );
if(size > 0 && size <= 4) size = 5;
if (flags & LMEM_MOVEABLE)
{
LOCALHANDLEENTRY *plhe;
HLOCAL16 hmem;
if(size)
{
if (!(hmem = LOCAL_GetBlock( ds, size + sizeof(HLOCAL16), flags )))
return 0;
}
else /* We just need to allocate a discarded handle */
hmem = 0;
if (!(handle = LOCAL_GetNewHandleEntry( ds )))
{
WARN_(local)("Couldn't get handle.\n");
if(hmem)
LOCAL_FreeArena( ds, ARENA_HEADER(hmem) );
return 0;
}
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
plhe = (LOCALHANDLEENTRY *)(ptr + handle);
plhe->lock = 0;
if(hmem)
{
plhe->addr = hmem + sizeof(HLOCAL16);
plhe->flags = (BYTE)((flags & 0x0f00) >> 8);
*(HLOCAL16 *)(ptr + hmem) = handle;
}
else
{
plhe->addr = 0;
plhe->flags = LMEM_DISCARDED >> 8;
}
}
else /* FIXED */
{
if(!size)
return 0;
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 = NULL;
WORD arena, oldsize;
HLOCAL16 hmem, blockhandle;
LONG nextarena;
if (!handle) return 0;
if(HANDLE_MOVEABLE(handle) &&
((LOCALHANDLEENTRY *)(ptr + handle))->lock == 0xff) /* An unused handle */
return 0;
TRACE_(local)("%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))
{
HLOCAL16 hl;
if(pEntry->addr)
WARN_(local)("Dicarded block has non-zero addr.\n");
TRACE_(local)("ReAllocating discarded block\n");
if(size <= 4) size = 5;
if (!(hl = LOCAL_GetBlock( ds, size + sizeof(HLOCAL16), flags)))
return 0;
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
pEntry->addr = hl + sizeof(HLOCAL16);
pEntry->flags = 0;
pEntry->lock = 0;
*(HLOCAL16 *)(ptr + hl) = handle;
return handle;
}
if (((blockhandle = pEntry->addr) & 3) != 2)
{
ERR_(local)("(%04x,%04x): invalid handle\n",
ds, handle );
return 0;
}
if(*((HLOCAL16 *)(ptr + blockhandle) - 1) != handle) {
ERR_(local)("Back ptr to handle is invalid\n");
return 0;
}
}
if (flags & LMEM_MODIFY)
{
if (HANDLE_MOVEABLE(handle))
{
pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
pEntry->flags = (flags & 0x0f00) >> 8;
TRACE_(local)("Changing flags to %x.\n", pEntry->flags);
}
return handle;
}
if (!size)
{
if (flags & LMEM_MOVEABLE)
{
if (HANDLE_FIXED(handle))
{
TRACE_(local)("Freeing fixed block.\n");
return LOCAL_Free( ds, handle );
}
else /* Moveable block */
{
pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
if (pEntry->lock == 0)
{
/* discards moveable blocks */
TRACE_(local)("Discarding block\n");
LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr));
pEntry->addr = 0;
pEntry->flags = (LMEM_DISCARDED >> 8);
return handle;
}
}
return 0;
}
else if(flags == 0)
{
pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
if (pEntry->lock == 0)
{
/* Frees block */
return LOCAL_Free( ds, handle );
}
}
return 0;
}
arena = ARENA_HEADER( blockhandle );
TRACE_(local)("arena is %04x\n", arena );
pArena = ARENA_PTR( ptr, arena );
if(size <= 4) size = 5;
oldsize = pArena->next - arena - ARENA_HEADER_SIZE;
nextarena = LALIGN(blockhandle + size);
/* Check for size reduction */
if (nextarena <= pArena->next)
{
TRACE_(local)("size reduction, making new free block\n");
LOCAL_ShrinkArena(ds, arena, nextarena - arena);
TRACE_(local)("returning %04x\n", handle );
return handle;
}
/* Check if the next block is free and large enough */
pNext = ARENA_PTR( ptr, pArena->next );
if (((pNext->prev & 3) == LOCAL_ARENA_FREE) &&
(nextarena <= pNext->next))
{
TRACE_(local)("size increase, making new free block\n");
LOCAL_GrowArenaUpward(ds, arena, nextarena - arena);
TRACE_(local)("returning %04x\n", handle );
return handle;
}
/* Now we have to allocate a new block, but not if (fixed block or locked
block) and no LMEM_MOVEABLE */
if (!(flags & LMEM_MOVEABLE))
{
if (HANDLE_FIXED(handle))
{
ERR_(local)("Needed to move fixed block, but LMEM_MOVEABLE not specified.\n");
return 0;
}
else
{
if(((LOCALHANDLEENTRY *)(ptr + handle))->lock != 0)
{
ERR_(local)("Needed to move locked block, but LMEM_MOVEABLE not specified.\n");
return 0;
}
}
}
if(HANDLE_MOVEABLE(handle)) size += sizeof(HLOCAL16);
hmem = LOCAL_GetBlock( ds, size, flags );
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
if(HANDLE_MOVEABLE(handle)) /* LOCAL_GetBlock might have triggered */
{ /* a compaction, which might in turn have */
blockhandle = pEntry->addr ; /* moved the very block we are resizing */
arena = ARENA_HEADER( blockhandle ); /* thus, we reload arena, too */
}
if (!hmem)
{
/* Remove the block from the heap and try again */
LPSTR buffer = HeapAlloc( GetProcessHeap(), 0, oldsize );
if (!buffer) return 0;
memcpy( buffer, ptr + arena + ARENA_HEADER_SIZE, oldsize );
LOCAL_FreeArena( ds, arena );
if (!(hmem = LOCAL_GetBlock( ds, size, flags )))
{
if (!(hmem = LOCAL_GetBlock( ds, oldsize, flags )))
{
ERR_(local)("Can't restore saved block\n" );
HeapFree( GetProcessHeap(), 0, buffer );
return 0;
}
size = oldsize;
}
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 ); /* Reload ptr */
memcpy( ptr + hmem, buffer, oldsize );
HeapFree( GetProcessHeap(), 0, buffer );
}
else
{
memcpy( ptr + hmem, ptr + (arena + ARENA_HEADER_SIZE), oldsize );
LOCAL_FreeArena( ds, arena );
}
if (HANDLE_MOVEABLE( handle ))
{
TRACE_(local)("fixing handle\n");
pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
pEntry->addr = hmem + sizeof(HLOCAL16);
/* Back ptr should still be correct */
if(*(HLOCAL16 *)(ptr + hmem) != handle)
ERR_(local)("back ptr is invalid.\n");
hmem = handle;
}
if (size == oldsize) hmem = 0; /* Realloc failed */
TRACE_(local)("returning %04x\n", hmem );
return hmem;
}
/***********************************************************************
* LOCAL_InternalLock
*/
static HLOCAL16 LOCAL_InternalLock( LPSTR heap, HLOCAL16 handle )
{
HLOCAL16 old_handle = handle;
if (HANDLE_MOVEABLE(handle))
{
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(heap + handle);
if (pEntry->flags == LMEM_DISCARDED) return 0;
if (pEntry->lock < 0xfe) pEntry->lock++;
handle = pEntry->addr;
}
TRACE_(local)("%04x returning %04x\n",
old_handle, 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 );
TRACE_(local)("%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;
TRACE_(local)("%04x ds=%04x\n", handle, ds );
if (HANDLE_MOVEABLE( handle )) handle = *(WORD *)(ptr + handle);
if (!handle) return 0;
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);
TRACE_(local)("(%04x,%04x): returning %04x\n",
ds, handle, pEntry->lock | (pEntry->flags << 8) );
return pEntry->lock | (pEntry->flags << 8);
}
else
{
TRACE_(local)("(%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 )))
{
ERR_(local)("(%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;
}
TRACE_(local)("(%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 )))
{
ERR_(local)("(%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 WINAPI LocalAlloc16( UINT16 flags, WORD size )
{
HLOCAL16 ret = LOCAL_Alloc( CURRENT_DS, flags, size );
CURRENT_STACK16->ecx = ret; /* must be returned in cx too */
return ret;
}
/***********************************************************************
* LocalReAlloc16 (KERNEL.6)
*/
HLOCAL16 WINAPI LocalReAlloc16( HLOCAL16 handle, WORD size, UINT16 flags )
{
return LOCAL_ReAlloc( CURRENT_DS, handle, size, flags );
}
/***********************************************************************
* LocalFree16 (KERNEL.7)
*/
HLOCAL16 WINAPI 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 WINAPI LocalLock16( HLOCAL16 handle )
{
return LOCAL_LockSegptr( CURRENT_DS, handle );
}
/***********************************************************************
* LocalUnlock16 (KERNEL.9)
*/
BOOL16 WINAPI LocalUnlock16( HLOCAL16 handle )
{
return LOCAL_Unlock( CURRENT_DS, handle );
}
/***********************************************************************
* LocalSize16 (KERNEL.10)
*/
UINT16 WINAPI LocalSize16( HLOCAL16 handle )
{
return LOCAL_Size( CURRENT_DS, handle );
}
/***********************************************************************
* LocalHandle16 (KERNEL.11)
*/
HLOCAL16 WINAPI LocalHandle16( WORD addr )
{
return LOCAL_Handle( CURRENT_DS, addr );
}
/***********************************************************************
* LocalFlags16 (KERNEL.12)
*/
UINT16 WINAPI LocalFlags16( HLOCAL16 handle )
{
return LOCAL_Flags( CURRENT_DS, handle );
}
/***********************************************************************
* LocalCompact16 (KERNEL.13)
*/
UINT16 WINAPI LocalCompact16( UINT16 minfree )
{
TRACE_(local)("%04x\n", minfree );
return LOCAL_Compact( CURRENT_DS, minfree, 0 );
}
/***********************************************************************
* LocalNotify (KERNEL.14)
*
* Installs a callback function that is called for local memory events
* Callback function prototype is
* BOOL16 NotifyFunc(WORD wMsg, HLOCAL16 hMem, WORD wArg)
* wMsg:
* - LN_OUTOFMEM
* NotifyFunc seems to be responsible for allocating some memory,
* returns TRUE for success.
* wArg = number of bytes needed additionally
* - LN_MOVE
* hMem = handle; wArg = old mem location
* - LN_DISCARD
* NotifyFunc seems to be strongly encouraged to return TRUE,
* otherwise LogError() gets called.
* hMem = handle; wArg = flags
*/
FARPROC16 WINAPI LocalNotify16( FARPROC16 func )
{
LOCALHEAPINFO *pInfo;
FARPROC16 oldNotify;
HANDLE16 ds = CURRENT_DS;
if (!(pInfo = LOCAL_GetHeap( ds )))
{
ERR_(local)("(%04x): Local heap not found\n", ds );
LOCAL_PrintHeap( ds );
return 0;
}
TRACE_(local)("(%04x): %08lx\n", ds, (DWORD)func );
FIXME_(local)("Half implemented\n");
oldNotify = pInfo->notify;
pInfo->notify = func;
return oldNotify;
}
/***********************************************************************
* LocalShrink16 (KERNEL.121)
*/
UINT16 WINAPI LocalShrink16( HGLOBAL16 handle, UINT16 newsize )
{
TRACE_(local)("%04x %04x\n", handle, newsize );
return 0;
}
/***********************************************************************
* GetHeapSpaces (KERNEL.138)
*/
DWORD WINAPI GetHeapSpaces16( HMODULE16 module )
{
NE_MODULE *pModule;
WORD ds;
if (!(pModule = NE_GetPtr( module ))) return 0;
ds =
GlobalHandleToSel16((NE_SEG_TABLE( pModule ) + pModule->dgroup - 1)->hSeg);
return MAKELONG( LOCAL_CountFree( ds ), LOCAL_HeapSize( ds ) );
}
/***********************************************************************
* LocalCountFree (KERNEL.161)
*/
WORD WINAPI LocalCountFree16(void)
{
return LOCAL_CountFree( CURRENT_DS );
}
/***********************************************************************
* LocalHeapSize (KERNEL.162)
*/
WORD WINAPI LocalHeapSize16(void)
{
TRACE_(local)("(void)\n" );
return LOCAL_HeapSize( CURRENT_DS );
}
/***********************************************************************
* LocalHandleDelta (KERNEL.310)
*/
WORD WINAPI LocalHandleDelta16( WORD delta )
{
LOCALHEAPINFO *pInfo;
if (!(pInfo = LOCAL_GetHeap( CURRENT_DS )))
{
ERR_(local)("Local heap not found\n");
LOCAL_PrintHeap( CURRENT_DS );
return 0;
}
if (delta) pInfo->hdelta = delta;
TRACE_(local)("returning %04x\n", pInfo->hdelta);
return pInfo->hdelta;
}
/***********************************************************************
* LocalInfo (TOOLHELP.56)
*/
BOOL16 WINAPI LocalInfo16( 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 WINAPI LocalFirst16( LOCALENTRY *pLocalEntry, HGLOBAL16 handle )
{
WORD ds = GlobalHandleToSel16( 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 WINAPI LocalNext16( LOCALENTRY *pLocalEntry )
{
WORD ds = GlobalHandleToSel16( 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)
* RETURNS
* Handle: Success
* NULL: Failure
*/
HLOCAL WINAPI LocalAlloc(
UINT flags, /* [in] Allocation attributes */
DWORD size /* [in] Number of bytes to allocate */
) {
return (HLOCAL)GlobalAlloc( flags, size );
}
/***********************************************************************
* LocalCompact32 (KERNEL32.372)
*/
UINT WINAPI LocalCompact( UINT minfree )
{
return 0; /* LocalCompact does nothing in Win32 */
}
/***********************************************************************
* LocalFlags32 (KERNEL32.374)
* RETURNS
* Value specifying allocation flags and lock count.
* LMEM_INVALID_HANDLE: Failure
*/
UINT WINAPI LocalFlags(
HLOCAL handle /* [in] Handle of memory object */
) {
return GlobalFlags( (HGLOBAL)handle );
}
/***********************************************************************
* LocalFree32 (KERNEL32.375)
* RETURNS
* NULL: Success
* Handle: Failure
*/
HLOCAL WINAPI LocalFree(
HLOCAL handle /* [in] Handle of memory object */
) {
return (HLOCAL)GlobalFree( (HGLOBAL)handle );
}
/***********************************************************************
* LocalHandle32 (KERNEL32.376)
* RETURNS
* Handle: Success
* NULL: Failure
*/
HLOCAL WINAPI LocalHandle(
LPCVOID ptr /* [in] Address of local memory object */
) {
return (HLOCAL)GlobalHandle( ptr );
}
/***********************************************************************
* LocalLock32 (KERNEL32.377)
* Locks a local memory object and returns pointer to the first byte
* of the memory block.
*
* RETURNS
* Pointer: Success
* NULL: Failure
*/
LPVOID WINAPI LocalLock(
HLOCAL handle /* [in] Address of local memory object */
) {
return GlobalLock( (HGLOBAL)handle );
}
/***********************************************************************
* LocalReAlloc32 (KERNEL32.378)
* RETURNS
* Handle: Success
* NULL: Failure
*/
HLOCAL WINAPI LocalReAlloc(
HLOCAL handle, /* [in] Handle of memory object */
DWORD size, /* [in] New size of block */
UINT flags /* [in] How to reallocate object */
) {
return (HLOCAL)GlobalReAlloc( (HGLOBAL)handle, size, flags );
}
/***********************************************************************
* LocalShrink32 (KERNEL32.379)
*/
UINT WINAPI LocalShrink( HGLOBAL handle, UINT newsize )
{
return 0; /* LocalShrink does nothing in Win32 */
}
/***********************************************************************
* LocalSize32 (KERNEL32.380)
* RETURNS
* Size: Success
* 0: Failure
*/
UINT WINAPI LocalSize(
HLOCAL handle /* [in] Handle of memory object */
) {
return GlobalSize( (HGLOBAL)handle );
}
/***********************************************************************
* LocalUnlock32 (KERNEL32.381)
* RETURNS
* TRUE: Object is still locked
* FALSE: Object is unlocked
*/
BOOL WINAPI LocalUnlock(
HLOCAL handle /* [in] Handle of memory object */
) {
return GlobalUnlock( (HGLOBAL)handle );
}
Reference in New Issue View Git Blame Copy Permalink