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Fix PAGE_ROUND_DOWN, PAGE_ROUND_UP, and a user of them (correctness and speedup)

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svn path=/trunk/; revision=29633
This commit is contained in:
Mike Nordell
2007-10-17 08:31:02 +00:00
parent 059e6ff652
commit 0a36bb76e5
3 changed files with 5 additions and 7 deletions
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reactos/include/ndk/mmtypes.h
+2 -4
View File
@@ -30,11 +30,9 @@ Author:
// Page-Rounding Macros
//
#define PAGE_ROUND_DOWN(x) \
(((ULONG_PTR)x)&(~(PAGE_SIZE-1)))
(((ULONG_PTR)(x))&(~(PAGE_SIZE-1)))
#define PAGE_ROUND_UP(x) \
( (((ULONG_PTR)x)%PAGE_SIZE) ? \
((((ULONG_PTR)x)&(~(PAGE_SIZE-1)))+PAGE_SIZE) : \
((ULONG_PTR)x) )
( (((ULONG_PTR)(x)) + PAGE_SIZE-1) & (~(PAGE_SIZE-1)) )
#ifdef NTOS_MODE_USER
#define ROUND_TO_PAGES(Size) \
(((ULONG_PTR)(Size) + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1))
reactos/include/reactos/helper.h
+2 -2
View File
@@ -20,11 +20,11 @@
#endif
#ifndef PAGE_ROUND_DOWN
#define PAGE_ROUND_DOWN(x) (((ULONG_PTR)x)&(~(PAGE_SIZE-1)))
#define PAGE_ROUND_DOWN(x) (((ULONG_PTR)(x))&(~(PAGE_SIZE-1)))
#endif
#ifndef PAGE_ROUND_UP
#define PAGE_ROUND_UP(x) ( (((ULONG_PTR)x)%PAGE_SIZE) ? ((((ULONG_PTR)x)&(~(PAGE_SIZE-1)))+PAGE_SIZE) : ((ULONG_PTR)x) )
#define PAGE_ROUND_UP(x) ( (((ULONG_PTR)(x)) + PAGE_SIZE-1) & (~(PAGE_SIZE-1)) )
#endif
#define ABS_VALUE(V) (((V) < 0) ? -(V) : (V))
reactos/ntoskrnl/mm/virtual.c
+1 -1
View File
@@ -390,7 +390,7 @@ MiProtectVirtualMemory(IN PEPROCESS Process,
NTSTATUS Status;
*NumberOfBytesToProtect =
PAGE_ROUND_UP((*BaseAddress) + (*NumberOfBytesToProtect)) -
PAGE_ROUND_UP((ULONG_PTR)(*BaseAddress) + (*NumberOfBytesToProtect)) -
PAGE_ROUND_DOWN(*BaseAddress);
*BaseAddress = (PVOID)PAGE_ROUND_DOWN(*BaseAddress);