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- Set the previous pointer from the next block,

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if some blocks was merged (in add_to_free_list).

svn path=/trunk/; revision=8080
This commit is contained in:
Hartmut Birr 2004-02-07 16:37:23 +00:00
parent 094ace70db
commit f6f4ac5f7b
1 changed files with 9 additions and 6 deletions
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15
reactos/ntoskrnl/mm/npool.c
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@ -1,4 +1,4 @@
/* $Id: npool.c,v 1.80 2003/12/30 18:52:05 fireball Exp $
/* $Id: npool.c,v 1.81 2004/02/07 16:37:23 hbirr Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -1170,6 +1170,7 @@ add_to_free_list(BLOCK_HDR* blk)
*/
{
BLOCK_HDR* current;
BOOL UpdatePrevPtr = FALSE;
DPRINT("add_to_free_list (%d)\n", blk->Size);
@ -1183,6 +1184,7 @@ add_to_free_list(BLOCK_HDR* blk)
current->Magic = BLOCK_HDR_USED_MAGIC;
memset(blk, 0xcc, BLOCK_HDR_SIZE);
blk = current;
UpdatePrevPtr = TRUE;
}
current = (BLOCK_HDR*)((char*)blk + BLOCK_HDR_SIZE + blk->Size);
@ -1192,13 +1194,14 @@ add_to_free_list(BLOCK_HDR* blk)
remove_from_free_list(current);
blk->Size += BLOCK_HDR_SIZE + current->Size;
memset(current, 0xcc, BLOCK_HDR_SIZE);
UpdatePrevPtr = TRUE;
current = (BLOCK_HDR*)((char*)blk + BLOCK_HDR_SIZE + blk->Size);
if ((char*)current < (char*)MiNonPagedPoolStart + MiNonPagedPoolLength)
{
current->previous = blk;
}
}
if (UpdatePrevPtr &&
(char*)current < (char*)MiNonPagedPoolStart + MiNonPagedPoolLength)
{
current->previous = blk;
}
DPRINT("%d\n", blk->Size);
blk->Magic = BLOCK_HDR_FREE_MAGIC;
EiFreeNonPagedPool += blk->Size;