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Align moveable blocks if the architecture requires it.

This commit is contained in:
Ulrich Weigand 2001-01-02 20:13:02 +00:00 committed by Alexandre Julliard
parent 59d0bdb89f
commit 6ef97439b4
1 changed files with 38 additions and 20 deletions
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58
memory/local.c
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@ -12,6 +12,8 @@
* parameter than usual.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include "wine/winbase16.h"
@ -40,7 +42,7 @@ typedef struct
} LOCALARENA;
#define ARENA_HEADER_SIZE 4
#define ARENA_HEADER( handle) ( ((handle) & ~3) - ARENA_HEADER_SIZE)
#define ARENA_HEADER( handle) ((handle) - ARENA_HEADER_SIZE)
/* Arena types (stored in 'prev' field of the arena) */
#define LOCAL_ARENA_FREE 0
@ -67,8 +69,9 @@ typedef struct
/*
* 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
* in case something actually relies on this.
* Note that if the architecture does not allow unaligned accesses, we make
* addr = 4n + 4 to avoid returning unaligned pointers from LocalAlloc etc.
*
* 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.
@ -77,6 +80,13 @@ typedef struct
* (LMEM_DISCARDED >> 8)
*/
#ifdef ALLOW_UNALIGNED_ACCESS
#define MOVEABLE_PREFIX sizeof(HLOCAL16)
#else
#define MOVEABLE_PREFIX sizeof(int)
#endif
#include "pshpack1.h"
typedef struct
@ -721,7 +731,7 @@ WORD LOCAL_Compact( HANDLE16 ds, UINT16 minfree, UINT16 flags )
/* OK we can move this one if we want */
TRACE("handle %04x (block %04x) can be moved.\n",
(WORD)((char *)pEntry - ptr), pEntry->addr);
movearena = ARENA_HEADER(pEntry->addr);
movearena = ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX);
pMoveArena = ARENA_PTR(ptr, movearena);
movesize = pMoveArena->next - movearena;
arena = pInfo->first;
@ -761,7 +771,7 @@ WORD LOCAL_Compact( HANDLE16 ds, UINT16 minfree, UINT16 flags )
LOCAL_CallTo16_word_www(pInfo->notify, LN_MOVE,
(WORD)((char *)pEntry - ptr), pEntry->addr);
/* Update handle table entry */
pEntry->addr = finalarena + ARENA_HEADER_SIZE + sizeof(HLOCAL16) ;
pEntry->addr = finalarena + ARENA_HEADER_SIZE + MOVEABLE_PREFIX;
}
else if((ARENA_PTR(ptr, pMoveArena->prev & ~3)->prev & 3)
== LOCAL_ARENA_FREE)
@ -771,7 +781,7 @@ WORD LOCAL_Compact( HANDLE16 ds, UINT16 minfree, UINT16 flags )
finalarena = pMoveArena->prev & ~3;
LOCAL_GrowArenaDownward( ds, movearena, movesize );
/* Update handle table entry */
pEntry->addr = finalarena + ARENA_HEADER_SIZE + sizeof(HLOCAL16) ;
pEntry->addr = finalarena + ARENA_HEADER_SIZE + MOVEABLE_PREFIX;
}
}
}
@ -795,7 +805,7 @@ WORD LOCAL_Compact( HANDLE16 ds, UINT16 minfree, UINT16 flags )
{
TRACE("Discarding handle %04x (block %04x).\n",
(char *)pEntry - ptr, pEntry->addr);
LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr));
LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX));
if (pInfo->notify)
LOCAL_CallTo16_word_www(pInfo->notify, LN_DISCARD,
(char *)pEntry - ptr, pEntry->flags);
@ -1100,7 +1110,7 @@ HLOCAL16 LOCAL_Free( HANDLE16 ds, HLOCAL16 handle )
{
TRACE("real block at %04x\n",
pEntry->addr );
if (LOCAL_FreeArena( ds, ARENA_HEADER(pEntry->addr) ))
if (LOCAL_FreeArena( ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX) ))
return handle; /* couldn't free it */
}
LOCAL_FreeHandleEntry( ds, handle );
@ -1130,7 +1140,7 @@ HLOCAL16 LOCAL_Alloc( HANDLE16 ds, WORD flags, WORD size )
if(size)
{
if (!(hmem = LOCAL_GetBlock( ds, size + sizeof(HLOCAL16), flags )))
if (!(hmem = LOCAL_GetBlock( ds, size + MOVEABLE_PREFIX, flags )))
return 0;
}
else /* We just need to allocate a discarded handle */
@ -1147,7 +1157,7 @@ HLOCAL16 LOCAL_Alloc( HANDLE16 ds, WORD flags, WORD size )
plhe->lock = 0;
if(hmem)
{
plhe->addr = hmem + sizeof(HLOCAL16);
plhe->addr = hmem + MOVEABLE_PREFIX;
plhe->flags = (BYTE)((flags & 0x0f00) >> 8);
*(HLOCAL16 *)(ptr + hmem) = handle;
}
@ -1203,23 +1213,23 @@ HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
WARN("Dicarded block has non-zero addr.\n");
TRACE("ReAllocating discarded block\n");
if(size <= 4) size = 5;
if (!(hl = LOCAL_GetBlock( ds, size + sizeof(HLOCAL16), flags)))
if (!(hl = LOCAL_GetBlock( ds, size + MOVEABLE_PREFIX, flags)))
return 0;
ptr = MapSL( MAKESEGPTR( ds, 0 ) ); /* Reload ptr */
pEntry = (LOCALHANDLEENTRY *) (ptr + handle);
pEntry->addr = hl + sizeof(HLOCAL16);
pEntry->addr = hl + MOVEABLE_PREFIX;
pEntry->flags = 0;
pEntry->lock = 0;
*(HLOCAL16 *)(ptr + hl) = handle;
return handle;
}
if (((blockhandle = pEntry->addr) & 3) != 2)
if (((blockhandle = pEntry->addr - MOVEABLE_PREFIX) & 3) != 0)
{
ERR("(%04x,%04x): invalid handle\n",
ds, handle );
return 0;
}
if(*((HLOCAL16 *)(ptr + blockhandle) - 1) != handle) {
if (*(HLOCAL16 *)(ptr + blockhandle) != handle) {
ERR("Back ptr to handle is invalid\n");
return 0;
}
@ -1252,7 +1262,7 @@ HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
{
/* discards moveable blocks */
TRACE("Discarding block\n");
LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr));
LOCAL_FreeArena(ds, ARENA_HEADER(pEntry->addr - MOVEABLE_PREFIX));
pEntry->addr = 0;
pEntry->flags = (LMEM_DISCARDED >> 8);
return handle;
@ -1277,6 +1287,7 @@ HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
pArena = ARENA_PTR( ptr, arena );
if(size <= 4) size = 5;
if(HANDLE_MOVEABLE(handle)) size += MOVEABLE_PREFIX;
oldsize = pArena->next - arena - ARENA_HEADER_SIZE;
nextarena = LALIGN(blockhandle + size);
@ -1321,12 +1332,12 @@ HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
}
}
}
if(HANDLE_MOVEABLE(handle)) size += sizeof(HLOCAL16);
hmem = LOCAL_GetBlock( ds, size, flags );
ptr = MapSL( MAKESEGPTR( 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 */
blockhandle = pEntry->addr - MOVEABLE_PREFIX; /* moved the very block we are resizing */
arena = ARENA_HEADER( blockhandle ); /* thus, we reload arena, too */
}
if (!hmem)
@ -1359,7 +1370,7 @@ HLOCAL16 LOCAL_ReAlloc( HANDLE16 ds, HLOCAL16 handle, WORD size, WORD flags )
{
TRACE("fixing handle\n");
pEntry = (LOCALHANDLEENTRY *)(ptr + handle);
pEntry->addr = hmem + sizeof(HLOCAL16);
pEntry->addr = hmem + MOVEABLE_PREFIX;
/* Back ptr should still be correct */
if(*(HLOCAL16 *)(ptr + hmem) != handle)
ERR("back ptr is invalid.\n");
@ -1433,9 +1444,16 @@ WORD LOCAL_Size( HANDLE16 ds, HLOCAL16 handle )
TRACE("%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) );
if (HANDLE_MOVEABLE( handle ))
{
handle = *(WORD *)(ptr + handle);
if (!handle) return 0;
pArena = ARENA_PTR( ptr, ARENA_HEADER(handle - MOVEABLE_PREFIX) );
}
else
pArena = ARENA_PTR( ptr, ARENA_HEADER(handle) );
return pArena->next - handle;
}