probeandlock.c

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/*++
 
Copyright (c) Microsoft Corporation
 
Module Name:
 
    ProbeAndLock.c
 
Abstract:
 
    This module contains C routines for probing and locking
    down memory buffers.
 
 
Author:
 
 
 
Environment:
 
    Kernel mode only
 
Revision History:
 
--*/
 
//
// These routines must be implemented in a C file to avoid problems
// with C++ exception handling errors.
//
 
#include <ntddk.h>
#include <pseh/pseh2.h> // __REACTOS__
 
NTSTATUS
FxProbeAndLockForRead(
    __in  PMDL   Mdl,
    __in  KPROCESSOR_MODE AccessMode
    )
{
    _SEH2_TRY
    {
        MmProbeAndLockPages(Mdl, AccessMode, IoReadAccess);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    return STATUS_SUCCESS;
}
 
NTSTATUS
FxProbeAndLockForWrite(
    __in  PMDL   Mdl,
    __in  KPROCESSOR_MODE AccessMode
    )
{
    _SEH2_TRY
    {
        MmProbeAndLockPages(Mdl, AccessMode, IoWriteAccess);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    return STATUS_SUCCESS;
}
 
NTSTATUS
FxProbeAndLockWithAccess(
    __in  PMDL   Mdl,
    __in  KPROCESSOR_MODE AccessMode,
    __in  LOCK_OPERATION Operation
    )
{
    _SEH2_TRY
    {
        MmProbeAndLockPages(Mdl, AccessMode, Operation);
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        _SEH2_YIELD(return _SEH2_GetExceptionCode());
    }
    _SEH2_END;
 
    return STATUS_SUCCESS;
}