906 lines
24 KiB
C
906 lines
24 KiB
C
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/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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atom.c
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Abstract:
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This file contains the common code to implement atom tables. It is called
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by both the user mode Win32 Atom API functions (Local/GlobalxxxAtom) and
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by the kernel mode window manager code to access global atoms.
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Author:
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Steve Wood (stevewo) 26-Oct-1990
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Revision History:
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--*/
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#include "ntrtlp.h"
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#include "atom.h"
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ULONG RtlpAtomAllocateTag;
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PVOID RtlpAllocateAtom(IN ULONG NumberOfBytes)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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return ExAllocatePoolWithTag( NonPagedPool, NumberOfBytes, RtlpAtomAllocateTag );
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#else
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return RtlAllocateHeap( RtlProcessHeap(), RtlpAtomAllocateTag, NumberOfBytes );
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#endif
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}
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void RtlpFreeAtom(IN PVOID p)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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ExFreePool( p );
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#else
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RtlFreeHeap( RtlProcessHeap(), 0, p );
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#endif
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return;
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}
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void RtlpInitializeLockAtomTable(IN OUT PRTL_ATOM_TABLE AtomTable)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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ExInitializeFastMutex( &AtomTable->FastMutex );
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#else
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RtlInitializeCriticalSection( &AtomTable->CriticalSection );
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#endif
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}
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BOOLEAN RtlpLockAtomTable(IN PRTL_ATOM_TABLE AtomTable)
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{
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if (AtomTable == NULL || AtomTable->Signature != RTL_ATOM_TABLE_SIGNATURE) {
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return FALSE;
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}
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#if defined(NTOS_KERNEL_RUNTIME)
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ExAcquireFastMutex( &AtomTable->FastMutex );
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#else
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RtlEnterCriticalSection( &AtomTable->CriticalSection );
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#endif
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return TRUE;
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}
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void RtlpUnlockAtomTable(IN PRTL_ATOM_TABLE AtomTable)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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ExReleaseFastMutex( &AtomTable->FastMutex );
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#else
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RtlLeaveCriticalSection( &AtomTable->CriticalSection );
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#endif
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}
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void
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RtlpDestroyLockAtomTable(
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IN OUT PRTL_ATOM_TABLE AtomTable
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)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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#else
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RtlDeleteCriticalSection( &AtomTable->CriticalSection );
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#endif
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}
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BOOLEAN
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RtlpInitializeHandleTableForAtomTable(
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PRTL_ATOM_TABLE AtomTable
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)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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AtomTable->ExHandleTable = ExCreateHandleTable( NULL );
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if (AtomTable->ExHandleTable != NULL) {
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// Make sure atom handle tables are NOT part of object handle enumeration
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ExRemoveHandleTable( AtomTable->ExHandleTable );
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return TRUE;
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}
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else {
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return FALSE;
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}
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#else
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RtlInitializeHandleTable( (ULONG)(USHORT)~RTL_ATOM_MAXIMUM_INTEGER_ATOM,
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sizeof( RTL_ATOM_HANDLE_TABLE_ENTRY ),
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&AtomTable->RtlHandleTable
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);
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return TRUE;
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#endif
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}
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void
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RtlpDestroyHandleTableForAtomTable(
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PRTL_ATOM_TABLE AtomTable
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)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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ExDestroyHandleTable( AtomTable->ExHandleTable, NULL );
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#else
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RtlDestroyHandleTable( &AtomTable->RtlHandleTable );
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#endif
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return;
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}
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PRTL_ATOM_TABLE_ENTRY
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RtlpAtomMapAtomToHandleEntry(
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IN PRTL_ATOM_TABLE AtomTable,
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IN ULONG HandleIndex
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)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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PHANDLE_TABLE_ENTRY ExHandleEntry;
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PRTL_ATOM_TABLE_ENTRY a;
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EXHANDLE ExHandle;
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ExHandle.Index = HandleIndex;
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ExHandleEntry = ExMapHandleToPointer( AtomTable->ExHandleTable,
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ExHandle.GenericHandleOverlay
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);
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if (ExHandleEntry != NULL) {
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a = ExHandleEntry->Object;
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ExUnlockHandleTableEntry( AtomTable->ExHandleTable, ExHandleEntry );
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return a;
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}
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#else
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PRTL_ATOM_HANDLE_TABLE_ENTRY HandleEntry;
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if (RtlIsValidIndexHandle( &AtomTable->RtlHandleTable,
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HandleIndex,
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(PRTL_HANDLE_TABLE_ENTRY *)&HandleEntry
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)
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) {
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return HandleEntry->Atom;
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}
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#endif
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return NULL;
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}
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BOOLEAN
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RtlpCreateHandleForAtom(
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PRTL_ATOM_TABLE p,
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PRTL_ATOM_TABLE_ENTRY a
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)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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EXHANDLE ExHandle;
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HANDLE_TABLE_ENTRY ExHandleEntry;
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ExHandleEntry.Object = a;
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ExHandleEntry.GrantedAccess = 0;
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ExHandle.GenericHandleOverlay = ExCreateHandle( p->ExHandleTable, &ExHandleEntry );
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if (ExHandle.GenericHandleOverlay != NULL) {
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a->HandleIndex = (USHORT)ExHandle.Index;
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a->Atom = (RTL_ATOM)((USHORT)a->HandleIndex | RTL_ATOM_MAXIMUM_INTEGER_ATOM);
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return TRUE;
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}
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#else
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PRTL_ATOM_HANDLE_TABLE_ENTRY HandleEntry;
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ULONG HandleIndex;
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HandleEntry = (PRTL_ATOM_HANDLE_TABLE_ENTRY)RtlAllocateHandle( &p->RtlHandleTable,
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&HandleIndex
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);
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if (HandleEntry != NULL) {
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if (HandleIndex < RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
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a->HandleIndex = (USHORT)HandleIndex;
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a->Atom = (RTL_ATOM)((USHORT)HandleIndex | RTL_ATOM_MAXIMUM_INTEGER_ATOM);
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HandleEntry->Atom = a;
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HandleEntry->LockCount = 0;
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HandleEntry->Flags = RTL_HANDLE_ALLOCATED;
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return TRUE;
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}
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RtlFreeHandle( &p->RtlHandleTable, (PRTL_HANDLE_TABLE_ENTRY)HandleEntry );
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}
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#endif
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return FALSE;
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}
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void
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RtlpFreeHandleForAtom(
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PRTL_ATOM_TABLE p,
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PRTL_ATOM_TABLE_ENTRY a
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)
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{
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#if defined(NTOS_KERNEL_RUNTIME)
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EXHANDLE ExHandle;
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ExHandle.Index = a->HandleIndex;
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ExDestroyHandle( p->ExHandleTable, ExHandle.GenericHandleOverlay, NULL );
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#else
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PRTL_ATOM_HANDLE_TABLE_ENTRY HandleEntry;
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if (RtlIsValidIndexHandle( &p->RtlHandleTable,
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a->HandleIndex,
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(PRTL_HANDLE_TABLE_ENTRY *)&HandleEntry
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)
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) {
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RtlFreeHandle( &p->RtlHandleTable, (PRTL_HANDLE_TABLE_ENTRY)HandleEntry );
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}
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#endif
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return;
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}
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NTSTATUS
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RtlInitializeAtomPackage(
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IN ULONG AllocationTag
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)
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{
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RtlpAtomAllocateTag = AllocationTag;
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return STATUS_SUCCESS;
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}
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NTSTATUS
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RtlCreateAtomTable(
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IN ULONG NumberOfBuckets,
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OUT PVOID *AtomTableHandle
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)
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{
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NTSTATUS Status;
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PRTL_ATOM_TABLE p;
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ULONG Size;
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Status = STATUS_SUCCESS;
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if (*AtomTableHandle == NULL) {
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if (NumberOfBuckets <= 1) {
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NumberOfBuckets = RTL_ATOM_TABLE_DEFAULT_NUMBER_OF_BUCKETS;
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}
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Size = sizeof( RTL_ATOM_TABLE ) +
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(sizeof( RTL_ATOM_TABLE_ENTRY ) * (NumberOfBuckets-1));
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p = (PRTL_ATOM_TABLE)RtlpAllocateAtom( Size );
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if (p == NULL) {
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Status = STATUS_NO_MEMORY;
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}
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else {
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RtlZeroMemory( p, Size );
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p->NumberOfBuckets = NumberOfBuckets;
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if (RtlpInitializeHandleTableForAtomTable( p )) {
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RtlpInitializeLockAtomTable( p );
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p->Signature = RTL_ATOM_TABLE_SIGNATURE;
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*AtomTableHandle = p;
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}
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else {
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Status = STATUS_NO_MEMORY;
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RtlpFreeAtom( p );
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}
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}
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}
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return Status;
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}
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NTSTATUS
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RtlDestroyAtomTable(
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IN PVOID AtomTableHandle
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)
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{
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NTSTATUS Status;
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PRTL_ATOM_TABLE p = (PRTL_ATOM_TABLE)AtomTableHandle;
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PRTL_ATOM_TABLE_ENTRY a, aNext, *pa;
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ULONG i;
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Status = STATUS_SUCCESS;
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if (!RtlpLockAtomTable( p )) {
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return STATUS_INVALID_PARAMETER;
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}
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try {
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pa = &p->Buckets[ 0 ];
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for (i=0; i<p->NumberOfBuckets; i++) {
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aNext = *pa;
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*pa++ = NULL;
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while ((a = aNext) != NULL) {
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aNext = a->HashLink;
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a->HashLink = NULL;
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RtlpFreeAtom( a );
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}
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}
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p->Signature = 0;
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RtlpUnlockAtomTable( p );
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RtlpDestroyHandleTableForAtomTable( p );
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RtlpDestroyLockAtomTable( p );
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RtlZeroMemory( p, sizeof( RTL_ATOM_TABLE ) );
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RtlpFreeAtom( p );
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}
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except (EXCEPTION_EXECUTE_HANDLER) {
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Status = GetExceptionCode();
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}
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return Status;
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}
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NTSTATUS
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RtlEmptyAtomTable(
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IN PVOID AtomTableHandle,
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IN BOOLEAN IncludePinnedAtoms
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)
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{
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NTSTATUS Status;
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PRTL_ATOM_TABLE p = (PRTL_ATOM_TABLE)AtomTableHandle;
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PRTL_ATOM_TABLE_ENTRY a, aNext, *pa, *pa1;
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ULONG i;
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Status = STATUS_SUCCESS;
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if (!RtlpLockAtomTable( p )) {
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return STATUS_INVALID_PARAMETER;
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}
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try {
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pa = &p->Buckets[ 0 ];
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for (i=0; i<p->NumberOfBuckets; i++) {
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pa1 = pa++;
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while ((a = *pa1) != NULL) {
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if (IncludePinnedAtoms || !(a->Flags & RTL_ATOM_PINNED)) {
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*pa1 = a->HashLink;
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a->HashLink = NULL;
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RtlpFreeHandleForAtom( p, a );
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RtlpFreeAtom( a );
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}
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else {
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pa1 = &a->HashLink;
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}
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}
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}
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RtlpUnlockAtomTable( p );
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}
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except (EXCEPTION_EXECUTE_HANDLER) {
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Status = GetExceptionCode();
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}
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return Status;
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}
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BOOLEAN
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RtlpGetIntegerAtom(
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PWSTR Name,
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PRTL_ATOM Atom OPTIONAL
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)
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{
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NTSTATUS Status;
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UNICODE_STRING UnicodeString;
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PWSTR s;
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ULONG n;
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RTL_ATOM Temp;
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if (((ULONG_PTR)Name & -0x10000) == 0) {
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Temp = (RTL_ATOM)(USHORT)PtrToUlong(Name);
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if (Temp >= RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
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return FALSE;
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}
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else {
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if (Temp == RTL_ATOM_INVALID_ATOM) {
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Temp = RTL_ATOM_MAXIMUM_INTEGER_ATOM;
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}
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if (ARGUMENT_PRESENT( Atom )) {
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*Atom = Temp;
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}
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return TRUE;
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}
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}
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else
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if (*Name != L'#') {
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return FALSE;
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}
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s = ++Name;
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while (*s != UNICODE_NULL) {
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||
|
|
if (*s < L'0' || *s > L'9') {
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
s++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
n = 0;
|
||
|
|
UnicodeString.Buffer = Name;
|
||
|
|
UnicodeString.Length = (USHORT)((PCHAR)s - (PCHAR)Name);
|
||
|
|
UnicodeString.MaximumLength = UnicodeString.Length;
|
||
|
|
Status = RtlUnicodeStringToInteger( &UnicodeString, 10, &n );
|
||
|
|
if (NT_SUCCESS( Status )) {
|
||
|
|
if (ARGUMENT_PRESENT( Atom )) {
|
||
|
|
if (n == 0 || n > RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
|
||
|
|
*Atom = RTL_ATOM_MAXIMUM_INTEGER_ATOM;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
*Atom = (RTL_ATOM)n;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
PRTL_ATOM_TABLE_ENTRY
|
||
|
|
RtlpHashStringToAtom(
|
||
|
|
IN PRTL_ATOM_TABLE p,
|
||
|
|
IN PWSTR Name,
|
||
|
|
OUT PRTL_ATOM_TABLE_ENTRY **PreviousAtom OPTIONAL,
|
||
|
|
OUT PULONG NameLength
|
||
|
|
)
|
||
|
|
{
|
||
|
|
ULONG Length, Hash;
|
||
|
|
WCHAR c;
|
||
|
|
PWCH s;
|
||
|
|
RTL_ATOM Atom;
|
||
|
|
PRTL_ATOM_TABLE_ENTRY *pa, a;
|
||
|
|
|
||
|
|
if (((ULONG_PTR)Name & -0x10000) == 0) {
|
||
|
|
Atom = (RTL_ATOM)(USHORT)PtrToUlong(Name);
|
||
|
|
a = NULL;
|
||
|
|
if (Atom >= RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
|
||
|
|
a = RtlpAtomMapAtomToHandleEntry( p,
|
||
|
|
(ULONG)(Atom & (USHORT)~RTL_ATOM_MAXIMUM_INTEGER_ATOM)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( PreviousAtom )) {
|
||
|
|
*PreviousAtom = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
return a;
|
||
|
|
}
|
||
|
|
|
||
|
|
s = Name;
|
||
|
|
Hash = 0;
|
||
|
|
while (*s != UNICODE_NULL) {
|
||
|
|
c = RtlUpcaseUnicodeChar( *s++ );
|
||
|
|
Hash = Hash + (c << 1) + (c >> 1) + c;
|
||
|
|
}
|
||
|
|
Length = (ULONG) (s - Name);
|
||
|
|
if (Length > RTL_ATOM_MAXIMUM_NAME_LENGTH) {
|
||
|
|
pa = NULL;
|
||
|
|
a = NULL;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
pa = &p->Buckets[ Hash % p->NumberOfBuckets ];
|
||
|
|
while (a = *pa) {
|
||
|
|
if (a->NameLength == Length && !_wcsicmp( a->Name, Name )) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
pa = &a->HashLink;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( PreviousAtom )) {
|
||
|
|
*PreviousAtom = pa;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (a == NULL && ARGUMENT_PRESENT( NameLength )) {
|
||
|
|
*NameLength = Length * sizeof( WCHAR );
|
||
|
|
}
|
||
|
|
|
||
|
|
return a;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
NTSTATUS
|
||
|
|
RtlAddAtomToAtomTable(
|
||
|
|
IN PVOID AtomTableHandle,
|
||
|
|
IN PWSTR AtomName OPTIONAL,
|
||
|
|
IN OUT PRTL_ATOM Atom OPTIONAL
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
PRTL_ATOM_TABLE p = (PRTL_ATOM_TABLE)AtomTableHandle;
|
||
|
|
PRTL_ATOM_TABLE_ENTRY a, *pa;
|
||
|
|
ULONG NameLength;
|
||
|
|
RTL_ATOM Temp;
|
||
|
|
|
||
|
|
if (!RtlpLockAtomTable( p )) {
|
||
|
|
return STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
if (RtlpGetIntegerAtom( AtomName, &Temp )) {
|
||
|
|
if (Temp >= RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
|
||
|
|
Temp = RTL_ATOM_INVALID_ATOM;
|
||
|
|
Status = STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( Atom )) {
|
||
|
|
*Atom = Temp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if (*AtomName == UNICODE_NULL) {
|
||
|
|
Status = STATUS_OBJECT_NAME_INVALID;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
a = RtlpHashStringToAtom( p, AtomName, &pa, &NameLength );
|
||
|
|
if (a == NULL) {
|
||
|
|
if (pa != NULL) {
|
||
|
|
Status = STATUS_NO_MEMORY;
|
||
|
|
a = RtlpAllocateAtom( FIELD_OFFSET( RTL_ATOM_TABLE_ENTRY, Name ) +
|
||
|
|
NameLength + sizeof( UNICODE_NULL )
|
||
|
|
);
|
||
|
|
if (a != NULL) {
|
||
|
|
a->HashLink = NULL;
|
||
|
|
a->ReferenceCount = 1;
|
||
|
|
a->Flags = 0;
|
||
|
|
RtlMoveMemory( a->Name, AtomName, NameLength );
|
||
|
|
a->NameLength = (UCHAR)(NameLength / sizeof( WCHAR ));
|
||
|
|
a->Name[ a->NameLength ] = UNICODE_NULL;
|
||
|
|
if (RtlpCreateHandleForAtom( p, a )) {
|
||
|
|
a->Atom = (RTL_ATOM)a->HandleIndex | RTL_ATOM_MAXIMUM_INTEGER_ATOM;
|
||
|
|
*pa = a;
|
||
|
|
if (ARGUMENT_PRESENT( Atom )) {
|
||
|
|
*Atom = a->Atom;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
RtlpFreeAtom( a );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (!(a->Flags & RTL_ATOM_PINNED)) {
|
||
|
|
if (a->ReferenceCount == 0xFFFF) {
|
||
|
|
KdPrint(( "RTL: Pinning atom (%x) as reference count about to wrap\n", Atom ));
|
||
|
|
a->Flags |= RTL_ATOM_PINNED;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
a->ReferenceCount += 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( Atom )) {
|
||
|
|
*Atom = a->Atom;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
except (EXCEPTION_EXECUTE_HANDLER) {
|
||
|
|
Status = GetExceptionCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
RtlpUnlockAtomTable( p );
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
NTSTATUS
|
||
|
|
RtlLookupAtomInAtomTable(
|
||
|
|
IN PVOID AtomTableHandle,
|
||
|
|
IN PWSTR AtomName,
|
||
|
|
OUT PRTL_ATOM Atom OPTIONAL
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
PRTL_ATOM_TABLE p = (PRTL_ATOM_TABLE)AtomTableHandle;
|
||
|
|
PRTL_ATOM_TABLE_ENTRY a;
|
||
|
|
RTL_ATOM Temp;
|
||
|
|
|
||
|
|
if (!RtlpLockAtomTable( p )) {
|
||
|
|
return STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
if (RtlpGetIntegerAtom( AtomName, &Temp )) {
|
||
|
|
if (Temp >= RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
|
||
|
|
Temp = RTL_ATOM_INVALID_ATOM;
|
||
|
|
Status = STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( Atom )) {
|
||
|
|
*Atom = Temp;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if (*AtomName == UNICODE_NULL) {
|
||
|
|
Status = STATUS_OBJECT_NAME_INVALID;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
a = RtlpHashStringToAtom( p, AtomName, NULL, NULL );
|
||
|
|
if (a == NULL) {
|
||
|
|
Status = STATUS_OBJECT_NAME_NOT_FOUND;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (RtlpAtomMapAtomToHandleEntry( p, (ULONG)a->HandleIndex ) != NULL) {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
if (ARGUMENT_PRESENT( Atom )) {
|
||
|
|
*Atom = a->Atom;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_INVALID_HANDLE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
except (EXCEPTION_EXECUTE_HANDLER) {
|
||
|
|
Status = GetExceptionCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
RtlpUnlockAtomTable( p );
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
NTSTATUS
|
||
|
|
RtlDeleteAtomFromAtomTable(
|
||
|
|
IN PVOID AtomTableHandle,
|
||
|
|
IN RTL_ATOM Atom
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
PRTL_ATOM_TABLE p = (PRTL_ATOM_TABLE)AtomTableHandle;
|
||
|
|
PRTL_ATOM_TABLE_ENTRY a, *pa;
|
||
|
|
|
||
|
|
if (!RtlpLockAtomTable( p )) {
|
||
|
|
return STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
Status = STATUS_INVALID_HANDLE;
|
||
|
|
if (Atom >= RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
|
||
|
|
a = RtlpAtomMapAtomToHandleEntry( p,
|
||
|
|
(ULONG)(Atom & (USHORT)~RTL_ATOM_MAXIMUM_INTEGER_ATOM)
|
||
|
|
);
|
||
|
|
if (a != NULL && a->Atom == Atom) {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
if (a->Flags & RTL_ATOM_PINNED) {
|
||
|
|
KdPrint(( "RTL: Ignoring attempt to delete a pinned atom (%x)\n", Atom ));
|
||
|
|
Status = STATUS_WAS_LOCKED; // This is a success status code!
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if (--a->ReferenceCount == 0) {
|
||
|
|
a = RtlpHashStringToAtom( p, a->Name, &pa, NULL );
|
||
|
|
if (a != NULL) {
|
||
|
|
*pa = a->HashLink;
|
||
|
|
RtlpFreeHandleForAtom( p, a );
|
||
|
|
RtlpFreeAtom( a );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if (Atom != RTL_ATOM_INVALID_ATOM) {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
except (EXCEPTION_EXECUTE_HANDLER) {
|
||
|
|
Status = GetExceptionCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
RtlpUnlockAtomTable( p );
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
NTSTATUS
|
||
|
|
RtlPinAtomInAtomTable(
|
||
|
|
IN PVOID AtomTableHandle,
|
||
|
|
IN RTL_ATOM Atom
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
PRTL_ATOM_TABLE p = (PRTL_ATOM_TABLE)AtomTableHandle;
|
||
|
|
PRTL_ATOM_TABLE_ENTRY a, *pa;
|
||
|
|
|
||
|
|
if (!RtlpLockAtomTable( p )) {
|
||
|
|
return STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
Status = STATUS_INVALID_HANDLE;
|
||
|
|
if (Atom >= RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
|
||
|
|
a = RtlpAtomMapAtomToHandleEntry( p,
|
||
|
|
(ULONG)(Atom & (USHORT)~RTL_ATOM_MAXIMUM_INTEGER_ATOM)
|
||
|
|
);
|
||
|
|
if (a != NULL && a->Atom == Atom) {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
a->Flags |= RTL_ATOM_PINNED;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
if (Atom != RTL_ATOM_INVALID_ATOM) {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
except (EXCEPTION_EXECUTE_HANDLER) {
|
||
|
|
Status = GetExceptionCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
RtlpUnlockAtomTable( p );
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
NTSTATUS
|
||
|
|
RtlQueryAtomInAtomTable(
|
||
|
|
IN PVOID AtomTableHandle,
|
||
|
|
IN RTL_ATOM Atom,
|
||
|
|
OUT PULONG AtomUsage OPTIONAL,
|
||
|
|
OUT PULONG AtomFlags OPTIONAL,
|
||
|
|
IN OUT PWSTR AtomName OPTIONAL,
|
||
|
|
IN OUT PULONG AtomNameLength OPTIONAL
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
PRTL_ATOM_TABLE p = (PRTL_ATOM_TABLE)AtomTableHandle;
|
||
|
|
PRTL_ATOM_TABLE_ENTRY a;
|
||
|
|
WCHAR AtomNameBuffer[ 16 ];
|
||
|
|
ULONG CopyLength;
|
||
|
|
|
||
|
|
if (!RtlpLockAtomTable( p )) {
|
||
|
|
return STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
try {
|
||
|
|
if (Atom < RTL_ATOM_MAXIMUM_INTEGER_ATOM) {
|
||
|
|
if (Atom == RTL_ATOM_INVALID_ATOM) {
|
||
|
|
Status = STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
if (ARGUMENT_PRESENT( AtomUsage )) {
|
||
|
|
*AtomUsage = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( AtomFlags )) {
|
||
|
|
*AtomFlags = RTL_ATOM_PINNED;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( AtomName )) {
|
||
|
|
CopyLength = _snwprintf( AtomNameBuffer,
|
||
|
|
sizeof( AtomNameBuffer ) / sizeof( WCHAR ),
|
||
|
|
L"#%u",
|
||
|
|
Atom
|
||
|
|
) * sizeof( WCHAR );
|
||
|
|
if (CopyLength >= *AtomNameLength) {
|
||
|
|
if (*AtomNameLength >= sizeof( UNICODE_NULL )) {
|
||
|
|
CopyLength = *AtomNameLength - sizeof( UNICODE_NULL );
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
CopyLength = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (CopyLength != 0) {
|
||
|
|
RtlMoveMemory( AtomName, AtomNameBuffer, CopyLength );
|
||
|
|
AtomName[ CopyLength / sizeof( WCHAR ) ] = UNICODE_NULL;
|
||
|
|
*AtomNameLength = CopyLength;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_BUFFER_TOO_SMALL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
a = RtlpAtomMapAtomToHandleEntry( p,
|
||
|
|
(ULONG)(Atom & (USHORT)~RTL_ATOM_MAXIMUM_INTEGER_ATOM)
|
||
|
|
);
|
||
|
|
if (a != NULL && a->Atom == Atom) {
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
if (ARGUMENT_PRESENT( AtomUsage )) {
|
||
|
|
*AtomUsage = a->ReferenceCount;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( AtomFlags )) {
|
||
|
|
*AtomFlags = a->Flags;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ARGUMENT_PRESENT( AtomName )) {
|
||
|
|
|
||
|
|
// Fill in as much of the atom string as possible, and
|
||
|
|
// always zero terminate. This is what win3.1 does.
|
||
|
|
|
||
|
|
|
||
|
|
CopyLength = a->NameLength * sizeof( WCHAR );
|
||
|
|
if (CopyLength >= *AtomNameLength) {
|
||
|
|
if (*AtomNameLength >= sizeof( UNICODE_NULL )) {
|
||
|
|
CopyLength = *AtomNameLength - sizeof( UNICODE_NULL );
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
*AtomNameLength = CopyLength;
|
||
|
|
CopyLength = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (CopyLength != 0) {
|
||
|
|
RtlMoveMemory( AtomName, a->Name, CopyLength );
|
||
|
|
AtomName[ CopyLength / sizeof( WCHAR ) ] = UNICODE_NULL;
|
||
|
|
*AtomNameLength = CopyLength;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_BUFFER_TOO_SMALL;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_INVALID_HANDLE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
except (EXCEPTION_EXECUTE_HANDLER) {
|
||
|
|
Status = GetExceptionCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
RtlpUnlockAtomTable( p );
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|
||
|
|
|
||
|
|
NTSTATUS
|
||
|
|
RtlQueryAtomsInAtomTable(
|
||
|
|
IN PVOID AtomTableHandle,
|
||
|
|
IN ULONG MaximumNumberOfAtoms,
|
||
|
|
OUT PULONG NumberOfAtoms,
|
||
|
|
OUT PRTL_ATOM Atoms
|
||
|
|
)
|
||
|
|
{
|
||
|
|
NTSTATUS Status;
|
||
|
|
PRTL_ATOM_TABLE p = (PRTL_ATOM_TABLE)AtomTableHandle;
|
||
|
|
PRTL_ATOM_TABLE_ENTRY a;
|
||
|
|
ULONG i;
|
||
|
|
ULONG CurrentAtomIndex;
|
||
|
|
|
||
|
|
if (!RtlpLockAtomTable( p )) {
|
||
|
|
return STATUS_INVALID_PARAMETER;
|
||
|
|
}
|
||
|
|
|
||
|
|
Status = STATUS_SUCCESS;
|
||
|
|
try {
|
||
|
|
CurrentAtomIndex = 0;
|
||
|
|
for (i=0; i<p->NumberOfBuckets; i++) {
|
||
|
|
a = p->Buckets[ i ];
|
||
|
|
while (a) {
|
||
|
|
if (CurrentAtomIndex < MaximumNumberOfAtoms) {
|
||
|
|
Atoms[ CurrentAtomIndex ] = a->Atom;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
Status = STATUS_INFO_LENGTH_MISMATCH;
|
||
|
|
}
|
||
|
|
|
||
|
|
CurrentAtomIndex += 1;
|
||
|
|
a = a->HashLink;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
*NumberOfAtoms = CurrentAtomIndex;
|
||
|
|
}
|
||
|
|
except (EXCEPTION_EXECUTE_HANDLER) {
|
||
|
|
Status = GetExceptionCode();
|
||
|
|
}
|
||
|
|
|
||
|
|
RtlpUnlockAtomTable( p );
|
||
|
|
|
||
|
|
return Status;
|
||
|
|
}
|