ReactOS Development > Doxygen

00001 /*
00002  * COPYRIGHT:       See COPYING in the top level directory
00003  * PROJECT:         ReactOS Kernel
00004  * FILE:            ntoskrnl/cache/logsup.c
00005  * PURPOSE:         Logging and configuration routines
00006  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
00007  */
00008 
00009 /* INCLUDES *******************************************************************/
00010 
00011 #include <ntoskrnl.h>
00012 #include "newcc.h"
00013 #define NDEBUG
00014 #include <debug.h>
00015 
00016 /* GLOBALS ********************************************************************/
00017 
00018 /* FUNCTIONS ******************************************************************/
00019 
00020 PMDL
00021 NTAPI
00022 CcpBuildCacheMdl(PFILE_OBJECT FileObject,
00023                  PLARGE_INTEGER FileOffset,
00024                  ULONG Length,
00025                  PIO_STATUS_BLOCK IOSB)
00026 {
00027     PMDL Mdl;
00028     PVOID Bcb, Buffer;
00029 
00030     BOOLEAN Result = CcMapData(FileObject,
00031                                FileOffset,
00032                                Length,
00033                                PIN_WAIT,
00034                                &Bcb,
00035                                &Buffer);
00036 
00037     if (!Result)
00038     {
00039         IOSB->Information = 0;
00040         IOSB->Status = STATUS_UNSUCCESSFUL;
00041         return NULL;
00042     }
00043 
00044     IOSB->Information = Length;
00045     IOSB->Status = STATUS_SUCCESS;
00046 
00047     Mdl = IoAllocateMdl(Buffer, Length, FALSE, FALSE, NULL);
00048 
00049     if (!Mdl)
00050     {
00051         IOSB->Information = 0;
00052         IOSB->Status = STATUS_NO_MEMORY;
00053         return NULL;
00054     }
00055 
00056     IOSB->Information = Length;
00057     IOSB->Status = STATUS_SUCCESS;
00058 
00059     return Mdl;
00060 }
00061 
00062 VOID
00063 NTAPI
00064 CcMdlRead(IN PFILE_OBJECT FileObject,
00065           IN PLARGE_INTEGER FileOffset,
00066           IN ULONG Length,
00067           OUT PMDL *MdlChain,
00068           OUT PIO_STATUS_BLOCK IoStatus)
00069 {
00070     *MdlChain = CcpBuildCacheMdl(FileObject, FileOffset, Length, IoStatus);
00071 }
00072 
00073 VOID
00074 NTAPI
00075 CcMdlReadComplete(IN PFILE_OBJECT FileObject,
00076                   IN PMDL MdlChain)
00077 {
00078     IoFreeMdl(MdlChain);
00079 }
00080 
00081 VOID
00082 NTAPI
00083 CcMdlReadComplete2(IN PMDL MdlChain,
00084                    IN PFILE_OBJECT FileObject)
00085 {
00086     UNIMPLEMENTED
00087 }
00088 
00089 VOID
00090 NTAPI
00091 CcPrepareMdlWrite(IN PFILE_OBJECT FileObject,
00092                   IN PLARGE_INTEGER FileOffset,
00093                   IN ULONG Length,
00094                   OUT PMDL *MdlChain,
00095                   OUT PIO_STATUS_BLOCK IoStatus)
00096 {
00097     *MdlChain = CcpBuildCacheMdl(FileObject, FileOffset, Length, IoStatus);
00098 }
00099 
00100 VOID
00101 NTAPI
00102 CcMdlWriteComplete(IN PFILE_OBJECT FileObject,
00103                    IN PLARGE_INTEGER FileOffset,
00104                    IN PMDL MdlChain)
00105 {
00106     IoFreeMdl(MdlChain);
00107 }
00108 
00109 VOID
00110 NTAPI
00111 CcMdlWriteComplete2(IN PFILE_OBJECT FileObject,
00112                     IN PLARGE_INTEGER FileOffset,
00113                     IN PMDL MdlChain)
00114 {
00115     UNIMPLEMENTED
00116 }
00117 
00118 VOID
00119 NTAPI
00120 CcMdlWriteAbort(IN PFILE_OBJECT FileObject,
00121                 IN PMDL MdlChain)
00122 {
00123     ASSERT(FALSE);
00124     IoFreeMdl(MdlChain);
00125 }
00126 
00127 /* EOF */
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