mirror of
https://github.com/reactos/reactos.git
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128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Kernel
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* FILE: ntoskrnl/cache/mdlsup.c
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* PURPOSE: Logging and configuration routines
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* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
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*/
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/* INCLUDES *******************************************************************/
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#include <ntoskrnl.h>
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#include "newcc.h"
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS ********************************************************************/
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/* FUNCTIONS ******************************************************************/
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PMDL
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NTAPI
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CcpBuildCacheMdl(PFILE_OBJECT FileObject,
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PLARGE_INTEGER FileOffset,
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ULONG Length,
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PIO_STATUS_BLOCK IOSB)
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{
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PMDL Mdl;
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PVOID Bcb, Buffer;
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BOOLEAN Result = CcMapData(FileObject,
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FileOffset,
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Length,
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PIN_WAIT,
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&Bcb,
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&Buffer);
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if (!Result)
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{
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IOSB->Information = 0;
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IOSB->Status = STATUS_UNSUCCESSFUL;
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return NULL;
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}
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IOSB->Information = Length;
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IOSB->Status = STATUS_SUCCESS;
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Mdl = IoAllocateMdl(Buffer, Length, FALSE, FALSE, NULL);
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if (!Mdl)
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{
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IOSB->Information = 0;
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IOSB->Status = STATUS_NO_MEMORY;
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return NULL;
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}
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IOSB->Information = Length;
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IOSB->Status = STATUS_SUCCESS;
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return Mdl;
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}
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VOID
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NTAPI
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CcMdlRead(IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN ULONG Length,
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OUT PMDL *MdlChain,
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OUT PIO_STATUS_BLOCK IoStatus)
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{
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*MdlChain = CcpBuildCacheMdl(FileObject, FileOffset, Length, IoStatus);
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}
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VOID
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NTAPI
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CcMdlReadComplete(IN PFILE_OBJECT FileObject,
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IN PMDL MdlChain)
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{
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IoFreeMdl(MdlChain);
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}
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VOID
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NTAPI
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CcMdlReadComplete2(IN PFILE_OBJECT FileObject,
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IN PMDL MdlChain)
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{
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UNIMPLEMENTED
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}
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VOID
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NTAPI
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CcPrepareMdlWrite(IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN ULONG Length,
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OUT PMDL *MdlChain,
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OUT PIO_STATUS_BLOCK IoStatus)
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{
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*MdlChain = CcpBuildCacheMdl(FileObject, FileOffset, Length, IoStatus);
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}
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VOID
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NTAPI
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CcMdlWriteComplete(IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN PMDL MdlChain)
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{
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IoFreeMdl(MdlChain);
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}
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VOID
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NTAPI
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CcMdlWriteComplete2(IN PFILE_OBJECT FileObject,
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IN PLARGE_INTEGER FileOffset,
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IN PMDL MdlChain)
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{
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UNIMPLEMENTED
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}
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VOID
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NTAPI
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CcMdlWriteAbort(IN PFILE_OBJECT FileObject,
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IN PMDL MdlChain)
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{
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ASSERT(FALSE);
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IoFreeMdl(MdlChain);
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}
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/* EOF */
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