1116 lines
33 KiB
C
1116 lines
33 KiB
C
/*
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* Local heap functions
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*
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* Copyright 1995 Alexandre Julliard
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*/
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/*
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* Note:
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* All local heap functions need the current DS as first parameter
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* when called from the emulation library, so they take one more
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* parameter than usual.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "windows.h"
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#include "ldt.h"
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#include "instance.h"
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#include "local.h"
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#include "module.h"
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#include "stackframe.h"
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#include "toolhelp.h"
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#include "stddebug.h"
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#include "debug.h"
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#ifndef WINELIB
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#pragma pack(1)
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#endif
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typedef struct
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{
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/* Arena header */
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WORD prev; /* Previous arena | arena type */
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WORD next; /* Next arena */
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/* Start of the memory block or free-list info */
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WORD size; /* Size of the free block */
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WORD free_prev; /* Previous free block */
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WORD free_next; /* Next free block */
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} LOCALARENA;
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#define ARENA_HEADER_SIZE 4
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#define ARENA_HEADER( handle) ( ((handle) & ~3) - ARENA_HEADER_SIZE)
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/* Arena types (stored in 'prev' field of the arena) */
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#define LOCAL_ARENA_FREE 0
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#define LOCAL_ARENA_FIXED 1
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#define LOCAL_ARENA_MOVEABLE 3
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typedef struct
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{
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WORD addr; /* Address of the MOVEABLE block */
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BYTE flags; /* Flags for this block */
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BYTE lock; /* Lock count */
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} LOCALHANDLEENTRY;
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typedef struct
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{
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WORD check; /* Heap checking flag */
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WORD freeze; /* Heap frozen flag */
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WORD items; /* Count of items on the heap */
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WORD first; /* First item of the heap */
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WORD pad1; /* Always 0 */
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WORD last; /* Last item of the heap */
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WORD pad2; /* Always 0 */
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BYTE ncompact; /* Compactions counter */
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BYTE dislevel; /* Discard level */
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DWORD distotal; /* Total bytes discarded */
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WORD htable; /* Pointer to handle table */
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WORD hfree; /* Pointer to free handle table */
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WORD hdelta; /* Delta to expand the handle table */
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WORD expand; /* Pointer to expand function (unused) */
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WORD pstat; /* Pointer to status structure (unused) */
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DWORD notify WINE_PACKED; /* Pointer to LocalNotify() function */
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WORD lock; /* Lock count for the heap */
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WORD extra; /* Extra bytes to allocate when expanding */
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WORD minsize; /* Minimum size of the heap */
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WORD magic; /* Magic number */
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} LOCALHEAPINFO;
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#ifndef WINELIB
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#pragma pack(4)
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#endif
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#define LOCAL_HEAP_MAGIC 0x484c /* 'LH' */
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/* All local heap allocations are aligned on 4-byte boundaries */
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#define LALIGN(word) (((word) + 3) & ~3)
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#define ARENA_PTR(ptr,arena) ((LOCALARENA *)((char*)(ptr)+(arena)))
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#define ARENA_PREV(ptr,arena) (ARENA_PTR(ptr,arena)->prev & ~3)
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#define ARENA_NEXT(ptr,arena) (ARENA_PTR(ptr,arena)->next)
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#define ARENA_FLAGS(ptr,arena) (ARENA_PTR(ptr,arena)->prev & 3)
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/* determine whether the handle belongs to a fixed or a moveable block */
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#define HANDLE_FIXED(handle) (((handle) & 3) == 0)
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#define HANDLE_MOVEABLE(handle) (((handle) & 3) == 2)
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/***********************************************************************
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* LOCAL_GetHeap
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*
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* Return a pointer to the local heap, making sure it exists.
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*/
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static LOCALHEAPINFO *LOCAL_GetHeap( WORD ds )
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{
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LOCALHEAPINFO *pInfo;
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INSTANCEDATA *ptr = (INSTANCEDATA *)PTR_SEG_OFF_TO_LIN( ds, 0 );
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dprintf_local( stddeb, "Heap at %p, %04x\n", ptr, ptr->heap );
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if (!ptr->heap) return NULL;
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if (IsBadReadPtr((SEGPTR)MAKELONG( ptr->heap, ds ), sizeof(LOCALHEAPINFO)))
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return NULL;
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pInfo = (LOCALHEAPINFO*)((char*)ptr + ptr->heap);
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if (pInfo->magic != LOCAL_HEAP_MAGIC) return NULL;
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return pInfo;
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}
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/***********************************************************************
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* LOCAL_MakeBlockFree
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*
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* Make a block free, inserting it in the free-list.
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* 'block' is the handle of the block arena; 'baseptr' points to
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* the beginning of the data segment containing the heap.
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*/
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static void LOCAL_MakeBlockFree( char *baseptr, WORD block )
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{
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LOCALARENA *pArena, *pNext;
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WORD next;
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/* Mark the block as free */
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pArena = ARENA_PTR( baseptr, block );
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pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FREE;
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pArena->size = pArena->next - block;
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/* Find the next free block (last block is always free) */
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next = pArena->next;
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for (;;)
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{
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pNext = ARENA_PTR( baseptr, next );
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if ((pNext->prev & 3) == LOCAL_ARENA_FREE) break;
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next = pNext->next;
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}
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dprintf_local( stddeb, "Local_AddFreeBlock %04x, next %04x\n", block, next );
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/* Insert the free block in the free-list */
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pArena->free_prev = pNext->free_prev;
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pArena->free_next = next;
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ARENA_PTR(baseptr,pNext->free_prev)->free_next = block;
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pNext->free_prev = block;
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}
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/***********************************************************************
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* LOCAL_RemoveFreeBlock
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*
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* Remove a block from the free-list.
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* 'block' is the handle of the block arena; 'baseptr' points to
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* the beginning of the data segment containing the heap.
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*/
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static void LOCAL_RemoveFreeBlock( char *baseptr, WORD block )
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{
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/* Mark the block as fixed */
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LOCALARENA *pArena = ARENA_PTR( baseptr, block );
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pArena->prev = (pArena->prev & ~3) | LOCAL_ARENA_FIXED;
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/* Remove it from the list */
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ARENA_PTR(baseptr,pArena->free_prev)->free_next = pArena->free_next;
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ARENA_PTR(baseptr,pArena->free_next)->free_prev = pArena->free_prev;
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}
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/***********************************************************************
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* LOCAL_AddBlock
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*
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* Insert a new block in the heap.
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* 'new' is the handle of the new block arena; 'baseptr' points to
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* the beginning of the data segment containing the heap; 'prev' is
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* the block before the new one.
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*/
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static void LOCAL_AddBlock( char *baseptr, WORD prev, WORD new )
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{
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LOCALARENA *pPrev = ARENA_PTR( baseptr, prev );
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LOCALARENA *pNew = ARENA_PTR( baseptr, new );
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pNew->prev = prev | LOCAL_ARENA_FIXED;
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pNew->next = pPrev->next;
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ARENA_PTR(baseptr,pPrev->next)->prev &= 3;
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ARENA_PTR(baseptr,pPrev->next)->prev |= new;
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pPrev->next = new;
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}
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/***********************************************************************
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* LOCAL_RemoveBlock
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*
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* Remove a block from the heap.
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* 'block' is the handle of the block arena; 'baseptr' points to
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* the beginning of the data segment containing the heap.
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*/
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static void LOCAL_RemoveBlock( char *baseptr, WORD block )
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{
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LOCALARENA *pArena, *pTmp;
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/* Remove the block from the free-list */
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dprintf_local( stddeb, "Local_RemoveBlock\n");
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pArena = ARENA_PTR( baseptr, block );
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if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
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LOCAL_RemoveFreeBlock( baseptr, block );
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/* If the previous block is free, expand its size */
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pTmp = ARENA_PTR( baseptr, pArena->prev & ~3 );
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if ((pTmp->prev & 3) == LOCAL_ARENA_FREE)
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pTmp->size += pArena->next - block;
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/* Remove the block from the linked list */
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pTmp->next = pArena->next;
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pTmp = ARENA_PTR( baseptr, pArena->next );
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pTmp->prev = (pTmp->prev & 3) | (pArena->prev & ~3);
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}
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/***********************************************************************
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* LOCAL_PrintHeap
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*/
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static void LOCAL_PrintHeap( WORD ds )
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{
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char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
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LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
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WORD arena;
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if (!debugging_local) return;
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if (!pInfo)
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{
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printf( "Local Heap corrupted! ds=%04x\n", ds );
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return;
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}
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printf( "Local Heap ds=%04x first=%04x last=%04x items=%d\n",
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ds, pInfo->first, pInfo->last, pInfo->items );
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arena = pInfo->first;
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for (;;)
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{
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LOCALARENA *pArena = ARENA_PTR(ptr,arena);
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printf( " %04x: prev=%04x next=%04x type=%d\n", arena,
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pArena->prev & ~3, pArena->next, pArena->prev & 3 );
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if (arena == pInfo->first)
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{
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printf( " size=%d free_prev=%04x free_next=%04x\n",
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pArena->size, pArena->free_prev, pArena->free_next );
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}
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if ((pArena->prev & 3) == LOCAL_ARENA_FREE)
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{
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printf( " size=%d free_prev=%04x free_next=%04x\n",
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pArena->size, pArena->free_prev, pArena->free_next );
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if (pArena->next == arena) break; /* last one */
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if (ARENA_PTR(ptr,pArena->free_next)->free_prev != arena)
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{
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printf( "*** arena->free_next->free_prev != arena\n" );
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break;
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}
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}
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if (pArena->next == arena)
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{
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printf( "*** last block is not marked free\n" );
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break;
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}
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if ((ARENA_PTR(ptr,pArena->next)->prev & ~3) != arena)
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{
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printf( "*** arena->next->prev != arena (%04x, %04x)\n",
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pArena->next, ARENA_PTR(ptr,pArena->next)->prev);
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break;
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}
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arena = pArena->next;
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}
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}
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/***********************************************************************
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* LocalInit (KERNEL.4)
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*/
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BOOL LocalInit( HANDLE selector, WORD start, WORD end )
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{
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char *ptr;
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WORD heapInfoArena, freeArena, lastArena;
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LOCALHEAPINFO *pHeapInfo;
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LOCALARENA *pArena, *pFirstArena, *pLastArena;
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NE_MODULE *pModule;
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/* The initial layout of the heap is: */
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/* - first arena (FIXED) */
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/* - heap info structure (FIXED) */
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/* - large free block (FREE) */
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/* - last arena (FREE) */
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dprintf_local(stddeb, "LocalInit: %04x %04x-%04x\n", selector, start, end);
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if (!selector) selector = CURRENT_DS;
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pHeapInfo = LOCAL_GetHeap(selector);
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if (pHeapInfo) {
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fprintf( stderr, "LocalInit: Heap %04x initialized twice.\n", selector);
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if (debugging_local) LOCAL_PrintHeap(selector);
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}
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if (start == 0) {
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/* Check if the segment is the DGROUP of a module */
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if ((pModule = (NE_MODULE *)GlobalLock( GetExePtr( selector ) )))
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{
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SEGTABLEENTRY *pSeg = NE_SEG_TABLE( pModule ) + pModule->dgroup - 1;
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if (pModule->dgroup && (pSeg->selector == selector)) {
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/* We can't just use the simple method of using the value
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* of minsize + stacksize, since there are programs that
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* resize the data segment before calling InitTask(). So,
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* we must put it at the end of the segment */
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start = GlobalSize( GlobalHandle( selector ) );
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start -= end;
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end += start;
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dprintf_local( stddeb," new start %04x, minstart: %04x\n", start, pSeg->minsize + pModule->stack_size);
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}
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}
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}
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ptr = PTR_SEG_OFF_TO_LIN( selector, 0 );
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start = LALIGN( MAX( start, sizeof(INSTANCEDATA) ) );
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heapInfoArena = LALIGN(start + sizeof(LOCALARENA) );
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freeArena = LALIGN( heapInfoArena + ARENA_HEADER_SIZE
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+ sizeof(LOCALHEAPINFO) );
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lastArena = (end - sizeof(LOCALARENA)) & ~3;
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/* Make sure there's enough space. */
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if (freeArena + sizeof(LOCALARENA) >= lastArena) return FALSE;
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/* Initialise the first arena */
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pFirstArena = ARENA_PTR( ptr, start );
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pFirstArena->prev = start | LOCAL_ARENA_FIXED;
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pFirstArena->next = heapInfoArena;
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pFirstArena->size = LALIGN(sizeof(LOCALARENA));
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pFirstArena->free_prev = start; /* this one */
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pFirstArena->free_next = freeArena;
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/* Initialise the arena of the heap info structure */
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pArena = ARENA_PTR( ptr, heapInfoArena );
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pArena->prev = start | LOCAL_ARENA_FIXED;
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pArena->next = freeArena;
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/* Initialise the heap info structure */
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pHeapInfo = (LOCALHEAPINFO *) (ptr + heapInfoArena + ARENA_HEADER_SIZE );
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memset( pHeapInfo, 0, sizeof(LOCALHEAPINFO) );
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pHeapInfo->items = 4;
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pHeapInfo->first = start;
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pHeapInfo->last = lastArena;
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pHeapInfo->htable = 0;
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pHeapInfo->hdelta = 0x20;
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pHeapInfo->extra = 0x200;
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pHeapInfo->minsize = lastArena - freeArena;
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pHeapInfo->magic = LOCAL_HEAP_MAGIC;
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/* Initialise the large free block */
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pArena = ARENA_PTR( ptr, freeArena );
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pArena->prev = heapInfoArena | LOCAL_ARENA_FREE;
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pArena->next = lastArena;
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pArena->size = lastArena - freeArena;
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pArena->free_prev = start;
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pArena->free_next = lastArena;
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/* Initialise the last block */
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pLastArena = ARENA_PTR( ptr, lastArena );
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pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
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pLastArena->next = lastArena; /* this one */
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pLastArena->size = LALIGN(sizeof(LOCALARENA));
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pLastArena->free_prev = freeArena;
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pLastArena->free_next = lastArena; /* this one */
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/* Store the local heap address in the instance data */
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((INSTANCEDATA *)ptr)->heap = heapInfoArena + ARENA_HEADER_SIZE;
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LOCAL_PrintHeap( selector );
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return TRUE;
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}
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/***********************************************************************
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* LOCAL_GrowHeap
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*/
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static void LOCAL_GrowHeap( WORD ds )
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{
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HANDLE hseg = GlobalHandle( ds );
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LONG oldsize = GlobalSize( hseg );
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LONG end;
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LOCALHEAPINFO *pHeapInfo;
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WORD freeArena, lastArena;
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LOCALARENA *pArena, *pLastArena;
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char *ptr;
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/* if nothing can be gained, return */
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if (oldsize > 0xfff0) return;
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hseg = GlobalReAlloc( hseg, 0x10000, GMEM_FIXED );
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ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
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pHeapInfo = LOCAL_GetHeap( ds );
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if (pHeapInfo == NULL) {
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fprintf( stderr, "Local_GrowHeap: heap not found\n" );
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return;
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}
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end = GlobalSize( hseg );
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lastArena = (end - sizeof(LOCALARENA)) & ~3;
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/* Update the HeapInfo */
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pHeapInfo->items++;
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freeArena = pHeapInfo->last;
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pHeapInfo->last = lastArena;
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pHeapInfo->minsize += end - oldsize;
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/* grow the old last block */
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/* FIXME: merge two adjacent free blocks */
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pArena = ARENA_PTR( ptr, freeArena );
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pArena->size = lastArena - freeArena;
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pArena->next = lastArena;
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pArena->free_next = lastArena;
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/* Initialise the new last block */
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pLastArena = ARENA_PTR( ptr, lastArena );
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pLastArena->prev = freeArena | LOCAL_ARENA_FREE;
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pLastArena->next = lastArena; /* this one */
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pLastArena->size = LALIGN(sizeof(LOCALARENA));
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pLastArena->free_prev = freeArena;
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pLastArena->free_next = lastArena; /* this one */
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dprintf_local( stddeb, "Heap expanded\n" );
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LOCAL_PrintHeap( ds );
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}
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/***********************************************************************
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* LOCAL_Compact
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*/
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static WORD LOCAL_Compact( WORD ds, WORD minfree, WORD flags )
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{
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char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
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LOCALHEAPINFO *pInfo;
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LOCALARENA *pArena;
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WORD arena;
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WORD freespace = 0;
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if (!(pInfo = LOCAL_GetHeap( ds ))) {
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dprintf_local( stddeb, "Local_FindFreeBlock: Local heap not found\n" );
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LOCAL_PrintHeap(ds);
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return 0;
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}
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arena = pInfo->first;
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pArena = ARENA_PTR( ptr, arena );
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while (arena != pArena->free_next) {
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arena = pArena->free_next;
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pArena = ARENA_PTR( ptr, arena );
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if (pArena->size >= freespace) freespace = pArena->size;
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}
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if (flags & LMEM_NOCOMPACT) return freespace;
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if (flags & LMEM_NODISCARD) return freespace;
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return freespace;
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}
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|
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/***********************************************************************
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* LOCAL_FindFreeBlock
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*/
|
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static HLOCAL LOCAL_FindFreeBlock( WORD ds, WORD size )
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{
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char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
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LOCALHEAPINFO *pInfo;
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LOCALARENA *pArena;
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WORD arena;
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|
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if (!(pInfo = LOCAL_GetHeap( ds ))) {
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dprintf_local( stddeb, "Local_FindFreeBlock: Local heap not found\n" );
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LOCAL_PrintHeap(ds);
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return 0;
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}
|
|
|
|
arena = pInfo->first;
|
|
pArena = ARENA_PTR( ptr, arena );
|
|
for (;;) {
|
|
arena = pArena->free_next;
|
|
pArena = ARENA_PTR( ptr, arena );
|
|
if (arena == pArena->free_next) break;
|
|
if (pArena->size >= size) return arena;
|
|
}
|
|
dprintf_local( stddeb, "Local_FindFreeBlock: not enough space\n" );
|
|
if (debugging_local) LOCAL_PrintHeap(ds);
|
|
return 0;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* LOCAL_GetBlock
|
|
* The segment may get moved around in this function, so all callers
|
|
* should reset their pointer variables.
|
|
*/
|
|
static HLOCAL LOCAL_GetBlock( WORD ds, WORD size, WORD flags )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
LOCALHEAPINFO *pInfo;
|
|
LOCALARENA *pArena;
|
|
WORD arena;
|
|
|
|
if (!(pInfo = LOCAL_GetHeap( ds ))) {
|
|
dprintf_local( stddeb, "Local_GetBlock: Local heap not found\n");
|
|
LOCAL_PrintHeap(ds);
|
|
return 0;
|
|
}
|
|
|
|
size += ARENA_HEADER_SIZE;
|
|
size = LALIGN( MAX( size, sizeof(LOCALARENA) ) );
|
|
|
|
/* Find a suitable free block */
|
|
arena = LOCAL_FindFreeBlock( ds, size );
|
|
if (arena == 0) {
|
|
/* no space: try to make some */
|
|
LOCAL_Compact( ds, size, flags );
|
|
arena = LOCAL_FindFreeBlock( ds, size );
|
|
}
|
|
if (arena == 0) {
|
|
/* still no space: try to grow the segment */
|
|
LOCAL_GrowHeap( ds );
|
|
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
pInfo = LOCAL_GetHeap( ds );
|
|
arena = LOCAL_FindFreeBlock( ds, size );
|
|
}
|
|
if (arena == 0) {
|
|
fprintf( stderr, "Local_GetBlock: not enough space!\n" );
|
|
return 0;
|
|
}
|
|
|
|
/* Make a block out of the free arena */
|
|
pArena = ARENA_PTR( ptr, arena );
|
|
dprintf_local( stddeb, "LOCAL_GetBlock size = %04x, arena at %04x size %04x\n", size,
|
|
arena, pArena->size );
|
|
if (pArena->size > size + LALIGN(sizeof(LOCALARENA)))
|
|
{
|
|
LOCAL_AddBlock( ptr, arena, arena+size );
|
|
LOCAL_MakeBlockFree( ptr, arena+size );
|
|
pInfo->items++;
|
|
}
|
|
LOCAL_RemoveFreeBlock( ptr, arena );
|
|
|
|
if (flags & LMEM_ZEROINIT) {
|
|
memset( (char *)pArena + ARENA_HEADER_SIZE, 0, size - ARENA_HEADER_SIZE );
|
|
}
|
|
|
|
dprintf_local( stddeb, "Local_GetBlock: arena at %04x\n", arena );
|
|
return arena + ARENA_HEADER_SIZE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* LOCAL_NewHTable
|
|
*/
|
|
static BOOL LOCAL_NewHTable( WORD ds )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
LOCALHEAPINFO *pInfo;
|
|
HLOCAL handle;
|
|
|
|
dprintf_local( stddeb, "Local_NewHTable\n" );
|
|
if (!(pInfo = LOCAL_GetHeap( ds ))) {
|
|
dprintf_local( stddeb, "Local heap not found\n");
|
|
LOCAL_PrintHeap(ds);
|
|
return FALSE;
|
|
}
|
|
|
|
handle = LOCAL_GetBlock( ds, pInfo->hdelta*4 + 2, LMEM_FIXED );
|
|
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
pInfo = LOCAL_GetHeap( ds );
|
|
if (handle == 0) return FALSE;
|
|
*(WORD *)(ptr + handle) = 0; /* no handles in this block yet */
|
|
pInfo->htable = handle;
|
|
return TRUE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* LOCAL_GetNewHandle
|
|
*/
|
|
static HLOCAL LOCAL_GetNewHandle( WORD ds )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
LOCALHEAPINFO *pInfo;
|
|
WORD count;
|
|
|
|
if (!(pInfo = LOCAL_GetHeap( ds ))) {
|
|
dprintf_local( stddeb, "LOCAL_GetNewHandle: Local heap not found\n");
|
|
LOCAL_PrintHeap(ds);
|
|
return 0;
|
|
}
|
|
/* Check if we need a new handle table */
|
|
if (pInfo->htable == 0) {
|
|
if (!LOCAL_NewHTable( ds )) return 0;
|
|
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
pInfo = LOCAL_GetHeap( ds );
|
|
}
|
|
if (*(WORD *)(ptr + pInfo->htable) == pInfo->hdelta) {
|
|
if (!LOCAL_NewHTable( ds )) return 0;
|
|
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
pInfo = LOCAL_GetHeap( ds );
|
|
}
|
|
|
|
/* increase count */
|
|
count = (*(WORD *)(ptr + pInfo->htable))++;
|
|
dprintf_local( stddeb, "Local_GetNewHandle: %04x\n", pInfo->htable + 2 + 4*count );
|
|
return pInfo->htable + 2 + 4*count;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* LOCAL_FreeArena
|
|
*/
|
|
static HLOCAL LOCAL_FreeArena( WORD ds, WORD arena )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
LOCALHEAPINFO *pInfo;
|
|
LOCALARENA *pArena, *pPrev, *pNext;
|
|
|
|
dprintf_local( stddeb, "LocalFreeArena: %04x ds=%04x\n", arena, ds );
|
|
if (!(pInfo = LOCAL_GetHeap( ds ))) return arena;
|
|
|
|
pArena = ARENA_PTR( ptr, arena );
|
|
if ((pArena->prev & 3) == LOCAL_ARENA_FREE) {
|
|
/* shouldn't happen */
|
|
fprintf( stderr, "LocalFreeArena: Trying to free a block twice!\n" );
|
|
LOCAL_PrintHeap( ds );
|
|
return arena;
|
|
}
|
|
|
|
/* Check if we can merge with the previous block */
|
|
|
|
pPrev = ARENA_PTR( ptr, pArena->prev & ~3 );
|
|
pNext = ARENA_PTR( ptr, pArena->next );
|
|
if ((pPrev->prev & 3) == LOCAL_ARENA_FREE)
|
|
{
|
|
arena = pArena->prev & ~3;
|
|
pArena = pPrev;
|
|
LOCAL_RemoveBlock( ptr, pPrev->next );
|
|
pInfo->items--;
|
|
}
|
|
else /* Make a new free block */
|
|
{
|
|
LOCAL_MakeBlockFree( ptr, arena );
|
|
}
|
|
|
|
/* Check if we can merge with the next block */
|
|
|
|
if ((pArena->next == pArena->free_next) &&
|
|
(pArena->next != pInfo->last))
|
|
{
|
|
LOCAL_RemoveBlock( ptr, pArena->next );
|
|
pInfo->items--;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LOCAL_Free
|
|
*
|
|
* Implementation of LocalFree().
|
|
*/
|
|
HLOCAL LOCAL_Free( HANDLE ds, HLOCAL handle )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
WORD arena;
|
|
|
|
dprintf_local( stddeb, "LocalFree: %04x ds=%04x\n", handle, ds );
|
|
|
|
if (!handle) { fprintf( stderr, "LOCAL_Free: handle is 0.\n" ); return 0; }
|
|
if (HANDLE_FIXED( handle )) {
|
|
arena = ARENA_HEADER( handle );
|
|
} else {
|
|
arena = ARENA_HEADER( *(WORD *)(ptr + handle) );
|
|
dprintf_local( stddeb, "LocalFree: real block at %04x\n", arena);
|
|
}
|
|
arena = LOCAL_FreeArena( ds, arena );
|
|
if (arena != 0) return handle; /* couldn't free it */
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LOCAL_Alloc
|
|
*
|
|
* Implementation of LocalAlloc().
|
|
*/
|
|
HLOCAL LOCAL_Alloc( HANDLE ds, WORD flags, WORD size )
|
|
{
|
|
char *ptr;
|
|
HLOCAL handle;
|
|
|
|
dprintf_local( stddeb, "LocalAlloc: %04x %d ds=%04x\n", flags, size, ds );
|
|
|
|
if (flags & LMEM_MOVEABLE) {
|
|
LOCALHANDLEENTRY *plhe;
|
|
HLOCAL hmem;
|
|
|
|
hmem = LOCAL_GetBlock( ds, size + 2, flags );
|
|
if (hmem == 0) return 0;
|
|
handle = LOCAL_GetNewHandle( ds );
|
|
if (handle == 0) {
|
|
fprintf( stderr, "LocalAlloc: couldn't get handle\n");
|
|
LOCAL_FreeArena( ds, ARENA_HEADER(hmem) );
|
|
return 0;
|
|
}
|
|
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
*(WORD *)(ptr + hmem) = handle;
|
|
plhe = (LOCALHANDLEENTRY *)(ptr + handle);
|
|
plhe->addr = hmem + 2;
|
|
plhe->lock = 0;
|
|
} else {
|
|
handle = LOCAL_GetBlock( ds, size, flags );
|
|
}
|
|
return handle;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LOCAL_ReAlloc
|
|
*
|
|
* Implementation of LocalReAlloc().
|
|
*/
|
|
HLOCAL LOCAL_ReAlloc( HANDLE ds, HLOCAL handle, WORD size, WORD flags )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
LOCALHEAPINFO *pInfo;
|
|
LOCALARENA *pArena, *pNext;
|
|
WORD arena, newhandle, blockhandle;
|
|
LONG nextarena;
|
|
|
|
if (!handle) return LOCAL_Alloc( ds, size, flags );
|
|
|
|
dprintf_local( stddeb, "LocalReAlloc: %04x %d %04x ds=%04x\n",
|
|
handle, size, flags, ds );
|
|
if (!(pInfo = LOCAL_GetHeap( ds ))) return 0;
|
|
|
|
if (HANDLE_FIXED( handle )) {
|
|
blockhandle = handle;
|
|
} else {
|
|
size += 2;
|
|
blockhandle = *(WORD *)(ptr + handle);
|
|
dprintf_local( stddeb, " blockhandle %04x (%04x)\n", blockhandle,
|
|
*(WORD *)(ptr + blockhandle - 2));
|
|
}
|
|
arena = ARENA_HEADER( blockhandle );
|
|
dprintf_local( stddeb, "LocalReAlloc: arena is %04x\n", arena );
|
|
pArena = ARENA_PTR( ptr, arena );
|
|
|
|
if (flags & LMEM_MODIFY) {
|
|
dprintf_local( stddeb, "LMEM_MODIFY set\n");
|
|
return handle;
|
|
}
|
|
if (!size) size = 1;
|
|
size = LALIGN( size );
|
|
nextarena = LALIGN(blockhandle + size);
|
|
|
|
/* Check for size reduction */
|
|
|
|
if (nextarena < pArena->next)
|
|
{
|
|
if (nextarena < pArena->next - LALIGN(sizeof(LOCALARENA)))
|
|
{
|
|
dprintf_local( stddeb, "size reduction, making new free block\n");
|
|
/* It is worth making a new free block */
|
|
LOCAL_AddBlock( ptr, arena, nextarena );
|
|
LOCAL_MakeBlockFree( ptr, nextarena );
|
|
pInfo->items++;
|
|
}
|
|
dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", handle );
|
|
return handle;
|
|
}
|
|
|
|
/* Check if the next block is free */
|
|
|
|
pNext = ARENA_PTR( ptr, pArena->next );
|
|
if (((pNext->prev & 3) == LOCAL_ARENA_FREE) &&
|
|
(nextarena <= pNext->next))
|
|
{
|
|
LOCAL_RemoveBlock( ptr, pArena->next );
|
|
if (nextarena < pArena->next - LALIGN(sizeof(LOCALARENA)))
|
|
{
|
|
dprintf_local( stddeb, "size increase, making new free block\n");
|
|
/* It is worth making a new free block */
|
|
LOCAL_AddBlock( ptr, arena, nextarena );
|
|
LOCAL_MakeBlockFree( ptr, nextarena );
|
|
pInfo->items++;
|
|
}
|
|
dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", handle );
|
|
return handle;
|
|
}
|
|
|
|
/* Now we have to allocate a new block */
|
|
|
|
newhandle = LOCAL_GetBlock( ds, size, flags );
|
|
if (newhandle == 0) return 0;
|
|
ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
memcpy( ptr + newhandle, ptr + (arena + ARENA_HEADER_SIZE), size );
|
|
LOCAL_FreeArena( ds, arena );
|
|
if (HANDLE_MOVEABLE( handle )) {
|
|
newhandle += 2;
|
|
dprintf_local( stddeb, "LocalReAlloc: fixing handle\n");
|
|
*(WORD *)(ptr + handle) = newhandle;
|
|
newhandle = handle;
|
|
}
|
|
dprintf_local( stddeb, "LocalReAlloc: returning %04x\n", newhandle );
|
|
return newhandle;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LOCAL_InternalLock
|
|
*/
|
|
static HLOCAL LOCAL_InternalLock( LPSTR heap, HLOCAL handle )
|
|
{
|
|
dprintf_local( stddeb, "LocalLock: %04x ", handle );
|
|
if (HANDLE_MOVEABLE(handle))
|
|
{
|
|
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(heap + handle);
|
|
if (pEntry->lock < 255) pEntry->lock++;
|
|
handle = pEntry->addr;
|
|
}
|
|
dprintf_local( stddeb, "returning %04x\n", handle );
|
|
return handle;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LOCAL_Lock
|
|
*/
|
|
LPSTR LOCAL_Lock( HANDLE ds, HLOCAL handle )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
return handle ? ptr + LOCAL_InternalLock( ptr, handle ) : NULL;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LOCAL_Unlock
|
|
*/
|
|
BOOL LOCAL_Unlock( WORD ds, HLOCAL handle )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
|
|
dprintf_local( stddeb, "LocalUnlock: %04x\n", handle );
|
|
if (HANDLE_MOVEABLE(handle))
|
|
{
|
|
LOCALHANDLEENTRY *pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
|
|
if (!pEntry->lock || (pEntry->lock == 255)) return FALSE;
|
|
/* For moveable block, return the new lock count */
|
|
/* (see _Windows_Internals_ p. 197) */
|
|
return --pEntry->lock;
|
|
}
|
|
else return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LOCAL_Size
|
|
*
|
|
* Implementation of LocalSize().
|
|
*/
|
|
WORD LOCAL_Size( WORD ds, HLOCAL handle )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( CURRENT_DS, 0 );
|
|
LOCALARENA *pArena;
|
|
WORD arena;
|
|
|
|
dprintf_local( stddeb, "LocalSize: %04x ds=%04x\n", handle, ds );
|
|
|
|
if (HANDLE_FIXED( handle )) {
|
|
arena = ARENA_HEADER( handle );
|
|
} else {
|
|
arena = ARENA_HEADER( handle = *(WORD *)(ptr + handle) );
|
|
}
|
|
pArena = ARENA_PTR( ptr, arena );
|
|
return pArena->next - handle;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LOCAL_HeapSize
|
|
*
|
|
* Implementation of LocalHeapSize().
|
|
*/
|
|
WORD LOCAL_HeapSize( WORD ds )
|
|
{
|
|
LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
|
|
if (!pInfo) return 0;
|
|
return pInfo->last - pInfo->first;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalAlloc (KERNEL.5)
|
|
*/
|
|
HLOCAL LocalAlloc( WORD flags, WORD size )
|
|
{
|
|
return LOCAL_Alloc( CURRENT_DS, flags, size );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalReAlloc (KERNEL.6)
|
|
*/
|
|
HLOCAL LocalReAlloc( HLOCAL handle, WORD size, WORD flags )
|
|
{
|
|
return LOCAL_ReAlloc( CURRENT_DS, handle, size, flags );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalFree (KERNEL.7)
|
|
*/
|
|
HLOCAL LocalFree( HLOCAL handle )
|
|
{
|
|
return LOCAL_Free( CURRENT_DS, handle );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalLock (KERNEL.8)
|
|
*/
|
|
NPVOID LocalLock( HLOCAL handle )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( CURRENT_DS, 0 );
|
|
return (NPVOID)LOCAL_InternalLock( ptr, handle );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalUnlock (KERNEL.9)
|
|
*/
|
|
BOOL LocalUnlock( HLOCAL handle )
|
|
{
|
|
return LOCAL_Unlock( CURRENT_DS, handle );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalSize (KERNEL.10)
|
|
*/
|
|
WORD LocalSize( HLOCAL handle )
|
|
{
|
|
return LOCAL_Size( CURRENT_DS, handle );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalHandle (KERNEL.11)
|
|
*/
|
|
HLOCAL LocalHandle( WORD addr )
|
|
{
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( CURRENT_DS, 0 );
|
|
|
|
dprintf_local( stddeb, "LocalHandle: %04x\n", addr );
|
|
if (HANDLE_MOVEABLE( addr )) {
|
|
addr = *(WORD *)(ptr + addr - 2);
|
|
}
|
|
return addr;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalFlags (KERNEL.12)
|
|
*/
|
|
WORD LocalFlags( HLOCAL handle )
|
|
{
|
|
dprintf_local( stddeb, "LocalFlags: %04x\n", handle );
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalCompact (KERNEL.13)
|
|
*/
|
|
WORD LocalCompact( WORD minfree )
|
|
{
|
|
dprintf_local( stddeb, "LocalCompact: %04x\n", minfree );
|
|
return LOCAL_Compact( CURRENT_DS, minfree, 0 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalNotify (KERNEL.14)
|
|
*/
|
|
FARPROC LocalNotify( FARPROC func )
|
|
{
|
|
dprintf_local( stddeb, "LocalNotify: %08lx\n", func );
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalShrink (KERNEL.121)
|
|
*/
|
|
WORD LocalShrink( HLOCAL handle, WORD newsize )
|
|
{
|
|
dprintf_local( stddeb, "LocalShrink: %04x %04x\n", handle, newsize );
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* GetHeapSpaces (KERNEL.138)
|
|
*/
|
|
DWORD GetHeapSpaces( HMODULE module )
|
|
{
|
|
return MAKELONG( 0x7fff, 0xffff );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalCountFree (KERNEL.161)
|
|
*/
|
|
void LocalCountFree()
|
|
{
|
|
dprintf_local( stddeb, "LocalCountFree:\n" );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalHeapSize (KERNEL.162)
|
|
*/
|
|
WORD LocalHeapSize()
|
|
{
|
|
dprintf_local( stddeb, "LocalHeapSize:\n" );
|
|
return LOCAL_HeapSize( CURRENT_DS );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalHandleDelta (KERNEL.310)
|
|
*/
|
|
WORD LocalHandleDelta( WORD delta )
|
|
{
|
|
dprintf_local( stddeb, "LocalHandleDelta: %04x\n", delta );
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalInfo (TOOLHELP.56)
|
|
*/
|
|
BOOL LocalInfo( LOCALINFO *pLocalInfo, HGLOBAL handle )
|
|
{
|
|
LOCALHEAPINFO *pInfo = LOCAL_GetHeap(SELECTOROF(WIN16_GlobalLock(handle)));
|
|
if (!pInfo) return FALSE;
|
|
pLocalInfo->wcItems = pInfo->items;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalFirst (TOOLHELP.57)
|
|
*/
|
|
BOOL LocalFirst( LOCALENTRY *pLocalEntry, HGLOBAL handle )
|
|
{
|
|
WORD ds = SELECTOROF( WIN16_GlobalLock( handle ) );
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
LOCALHEAPINFO *pInfo = LOCAL_GetHeap( ds );
|
|
if (!pInfo) return FALSE;
|
|
|
|
pLocalEntry->hHandle = pInfo->first + ARENA_HEADER_SIZE;
|
|
pLocalEntry->wAddress = pLocalEntry->hHandle;
|
|
pLocalEntry->wFlags = LF_FIXED;
|
|
pLocalEntry->wcLock = 0;
|
|
pLocalEntry->wType = LT_NORMAL;
|
|
pLocalEntry->hHeap = handle;
|
|
pLocalEntry->wHeapType = NORMAL_HEAP;
|
|
pLocalEntry->wNext = ARENA_PTR(ptr,pInfo->first)->next;
|
|
pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* LocalNext (TOOLHELP.58)
|
|
*/
|
|
BOOL LocalNext( LOCALENTRY *pLocalEntry )
|
|
{
|
|
WORD ds = SELECTOROF( pLocalEntry->hHeap );
|
|
char *ptr = PTR_SEG_OFF_TO_LIN( ds, 0 );
|
|
LOCALARENA *pArena;
|
|
|
|
if (!LOCAL_GetHeap( ds )) return FALSE;
|
|
if (!pLocalEntry->wNext) return FALSE;
|
|
pArena = ARENA_PTR( ptr, pLocalEntry->wNext );
|
|
|
|
pLocalEntry->hHandle = pLocalEntry->wNext + ARENA_HEADER_SIZE;
|
|
pLocalEntry->wAddress = pLocalEntry->hHandle;
|
|
pLocalEntry->wFlags = (pArena->prev & 3) + 1;
|
|
pLocalEntry->wcLock = 0;
|
|
pLocalEntry->wType = LT_NORMAL;
|
|
if (pArena->next != pLocalEntry->wNext) /* last one? */
|
|
pLocalEntry->wNext = pArena->next;
|
|
else
|
|
pLocalEntry->wNext = 0;
|
|
pLocalEntry->wSize = pLocalEntry->wNext - pLocalEntry->hHandle;
|
|
return TRUE;
|
|
}
|