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- ExpLookupHandleTableEntry: Apply same changes as was done for ExpFreeHandleTable and ExpAllocateHandleTableEntrySlow in 34467

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- ExpAllocateHandleTableEntry: Fail if we don't find a handle table entry

svn path=/trunk/; revision=35042
This commit is contained in:
Stefan Ginsberg 2008-08-02 18:25:53 +00:00
parent 9b188f4ebc
commit a124618434
1 changed files with 12 additions and 10 deletions
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22
reactos/ntoskrnl/ex/handle.c
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@ -35,8 +35,10 @@ NTAPI
ExpLookupHandleTableEntry(IN PHANDLE_TABLE HandleTable,
IN EXHANDLE LookupHandle)
{
ULONG i, j, k, TableLevel, NextHandle;
ULONG_PTR TableBase;
ULONG i, j, k, NextHandle;
ULONG_PTR TableCode = HandleTable->TableCode;
ULONG_PTR TableBase = TableCode & ~3;
ULONG TableLevel = (ULONG)(TableCode & 3);
PHANDLE_TABLE_ENTRY Entry = NULL;
EXHANDLE Handle = LookupHandle;
PUCHAR Level1, Level2, Level3;
@ -46,13 +48,6 @@ ExpLookupHandleTableEntry(IN PHANDLE_TABLE HandleTable,
NextHandle = *(volatile ULONG*)&HandleTable->NextHandleNeedingPool;
if (Handle.Value >= NextHandle) return NULL;
/* Get the table code */
TableBase = *(volatile ULONG_PTR*)&HandleTable->TableCode;
/* Extract the table level and actual table base */
TableLevel = (ULONG)(TableBase & 3);
TableBase = TableBase - TableLevel;
/* Check what level we're running at */
switch (TableLevel)
{
@ -210,8 +205,8 @@ ExpFreeHandleTable(IN PHANDLE_TABLE HandleTable)
PEPROCESS Process = HandleTable->QuotaProcess;
ULONG i, j;
ULONG_PTR TableCode = HandleTable->TableCode;
ULONG TableLevel = TableCode & 3;
ULONG_PTR TableBase = TableCode & ~3;
ULONG TableLevel = (ULONG)(TableCode & 3);
PHANDLE_TABLE_ENTRY Level1, *Level2, **Level3;
PAGED_CODE();
@ -734,6 +729,13 @@ ExpAllocateHandleTableEntry(IN PHANDLE_TABLE HandleTable,
/* Lookup the entry for this handle */
Entry = ExpLookupHandleTableEntry(HandleTable, Handle);
/* Make sure that we found an entry */
if (!Entry)
{
/* We didn't, fail */
return NULL;
}
/* Get an available lock and acquire it */
i = ((OldValue & FREE_HANDLE_MASK) >> 2) % 4;
KeEnterCriticalRegion();