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[NTOS]: Define the POOL_HEADER for x64.

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[NTOS]: Define POOL_BLOCK_SIZE definition to set the minimum pool block size. In NT, this is equal to a LIST_ENTRY structure, because the Pool Allocator must be able to store a LIST_ENTRY into a freed pool block. This also determines the alignment of pool allocations. So 8 on x86, 16 on x64.
[NTOS]: Don't depend on LIST_ENTRY, but use POOL_BLOCK_SIZE instead (on IA64, if we ever want to support this, the pool block size is different from a LIST_ENTRY/POOL_HEADER).
[NTOS]: The following ASSERTs must hold: the POOL_HEADER must be as big as the the smallest pool block (POOL_BLOCK_SIZE), which must be at least as big as a LIST_ENTRY structure. 8 == 8 == 8 on x86, 16 == 16 == 16 on x64.

svn path=/trunk/; revision=47592
This commit is contained in:
Sir Richard
2010-06-05 16:53:54 +00:00
parent 6aad48190c
commit cb9c4019bb
1 changed files with 24 additions and 8 deletions
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reactos/ntoskrnl/mm/ARM3/miarm.h
+24 -8
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@@ -225,13 +225,18 @@ MmProtectToPteMask[32] =
// Special IRQL value (found in assertions)
//
#define MM_NOIRQL (KIRQL)0xFFFFFFFF
//
// FIXFIX: These should go in ex.h after the pool merge
//
#define POOL_LISTS_PER_PAGE (PAGE_SIZE / sizeof(LIST_ENTRY))
#ifdef _M_AMD64
#define POOL_BLOCK_SIZE 16
#else
#define POOL_BLOCK_SIZE 8
#endif
#define POOL_LISTS_PER_PAGE (PAGE_SIZE / POOL_BLOCK_SIZE)
#define BASE_POOL_TYPE_MASK 1
#define POOL_MAX_ALLOC (PAGE_SIZE - (sizeof(POOL_HEADER) + sizeof(LIST_ENTRY)))
#define POOL_MAX_ALLOC (PAGE_SIZE - (sizeof(POOL_HEADER) + POOL_BLOCK_SIZE))
typedef struct _POOL_DESCRIPTOR
{
@@ -256,16 +261,30 @@ typedef struct _POOL_HEADER
{
struct
{
#ifdef _M_AMD64
ULONG PreviousSize:8;
ULONG PoolIndex:8;
ULONG BlockSize:8;
ULONG PoolType:8;
#else
USHORT PreviousSize:9;
USHORT PoolIndex:7;
USHORT BlockSize:9;
USHORT PoolType:7;
#endif
};
ULONG Ulong1;
};
#ifdef _M_AMD64
ULONG PoolTag;
#endif
union
{
#ifdef _M_AMD64
PEPROCESS ProcessBilled;
#else
ULONG PoolTag;
#endif
struct
{
USHORT AllocatorBackTraceIndex;
@@ -274,11 +293,8 @@ typedef struct _POOL_HEADER
};
} POOL_HEADER, *PPOOL_HEADER;
//
// Everything depends on this
//
C_ASSERT(sizeof(POOL_HEADER) == 8);
C_ASSERT(sizeof(POOL_HEADER) == sizeof(LIST_ENTRY));
C_ASSERT(sizeof(POOL_HEADER) == POOL_BLOCK_SIZE);
C_ASSERT(POOL_BLOCK_SIZE == sizeof(LIST_ENTRY));
extern ULONG ExpNumberOfPagedPools;
extern POOL_DESCRIPTOR NonPagedPoolDescriptor;