ntoskrnl/cc/cacheman.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS kernel
   4  * FILE:            ntoskrnl/cc/cacheman.c
   5  * PURPOSE:         Cache manager
   6  *
   7  * PROGRAMMERS:     David Welch (welch@cwcom.net)
   8  *                  Pierre Schweitzer (pierre@reactos.org)
   9  */
  10
  11 /* INCLUDES *****************************************************************/
  12
  13 #include <ntoskrnl.h>
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 BOOLEAN CcPfEnablePrefetcher;
  18 PFSN_PREFETCHER_GLOBALS CcPfGlobals;
  19
  20 /* FUNCTIONS *****************************************************************/
  21
  22 VOID
  23 NTAPI
  24 INIT_FUNCTION
  25 CcPfInitializePrefetcher(VOID)
  26 {
  27     /* Notify debugger */
  28     DbgPrintEx(DPFLTR_PREFETCHER_ID,
  29                DPFLTR_TRACE_LEVEL,
  30                "CCPF: InitializePrefetecher()\n");
  31
  32     /* Setup the Prefetcher Data */
  33     InitializeListHead(&CcPfGlobals.ActiveTraces);
  34     InitializeListHead(&CcPfGlobals.CompletedTraces);
  35     ExInitializeFastMutex(&CcPfGlobals.CompletedTracesLock);
  36
  37     /* FIXME: Setup the rest of the prefetecher */
  38 }
  39
  40 BOOLEAN
  41 NTAPI
  42 INIT_FUNCTION
  43 CcInitializeCacheManager(VOID)
  44 {
  45     return CcInitView();
  46 }
  47
  48 VOID
  49 NTAPI
  50 CcShutdownSystem(VOID)
  51 {
  52     /* Inform the lazy writer it has to stop activity */
  53     CcShutdownLazyWriter();
  54 }
  55
  56 /*
  57  * @unimplemented
  58  */
  59 LARGE_INTEGER
  60 NTAPI
  61 CcGetFlushedValidData (
  62     IN PSECTION_OBJECT_POINTERS SectionObjectPointer,
  63     IN BOOLEAN BcbListHeld
  64     )
  65 {
  66         LARGE_INTEGER i;
  67
  68         UNIMPLEMENTED;
  69
  70         i.QuadPart = 0;
  71         return i;
  72 }
  73
  74 /*
  75  * @unimplemented
  76  */
  77 PVOID
  78 NTAPI
  79 CcRemapBcb (
  80     IN PVOID Bcb
  81     )
  82 {
  83         UNIMPLEMENTED;
  84
  85     return 0;
  86 }
  87
  88 /*
  89  * @unimplemented
  90  */
  91 VOID
  92 NTAPI
  93 CcScheduleReadAhead (
  94         IN      PFILE_OBJECT            FileObject,
  95         IN      PLARGE_INTEGER          FileOffset,
  96         IN      ULONG                   Length
  97         )
  98 {
  99         UNIMPLEMENTED;
 100 }
 101
 102 /*
 103  * @unimplemented
 104  */
 105 VOID
 106 NTAPI
 107 CcSetAdditionalCacheAttributes (
 108         IN      PFILE_OBJECT    FileObject,
 109         IN      BOOLEAN         DisableReadAhead,
 110         IN      BOOLEAN         DisableWriteBehind
 111         )
 112 {
 113     CCTRACE(CC_API_DEBUG, "FileObject=%p DisableReadAhead=%d DisableWriteBehind=%d\n",
 114         FileObject, DisableReadAhead, DisableWriteBehind);
 115
 116         UNIMPLEMENTED;
 117 }
 118
 119 /*
 120  * @unimplemented
 121  */
 122 VOID
 123 NTAPI
 124 CcSetBcbOwnerPointer (
 125         IN      PVOID   Bcb,
 126         IN      PVOID   Owner
 127         )
 128 {
 129     PINTERNAL_BCB iBcb = Bcb;
 130
 131     CCTRACE(CC_API_DEBUG, "Bcb=%p Owner=%p\n",
 132         Bcb, Owner);
 133
 134     if (!ExIsResourceAcquiredExclusiveLite(&iBcb->Lock) && !ExIsResourceAcquiredSharedLite(&iBcb->Lock))
 135     {
 136         DPRINT1("Current thread doesn't own resource!\n");
 137         return;
 138     }
 139
 140     ExSetResourceOwnerPointer(&iBcb->Lock, Owner);
 141 }
 142
 143 /*
 144  * @implemented
 145  */
 146 VOID
 147 NTAPI
 148 CcSetDirtyPageThreshold (
 149         IN      PFILE_OBJECT    FileObject,
 150         IN      ULONG           DirtyPageThreshold
 151         )
 152 {
 153     PFSRTL_COMMON_FCB_HEADER Fcb;
 154     PROS_SHARED_CACHE_MAP SharedCacheMap;
 155
 156     CCTRACE(CC_API_DEBUG, "FileObject=%p DirtyPageThreshold=%lu\n",
 157         FileObject, DirtyPageThreshold);
 158
 159     SharedCacheMap = FileObject->SectionObjectPointer->SharedCacheMap;
 160     if (SharedCacheMap != NULL)
 161     {
 162         SharedCacheMap->DirtyPageThreshold = DirtyPageThreshold;
 163     }
 164
 165     Fcb = FileObject->FsContext;
 166     if (!BooleanFlagOn(Fcb->Flags, FSRTL_FLAG_LIMIT_MODIFIED_PAGES))
 167     {
 168         SetFlag(Fcb->Flags, FSRTL_FLAG_LIMIT_MODIFIED_PAGES);
 169     }
 170 }
 171
 172 /*
 173  * @unimplemented
 174  */
 175 VOID
 176 NTAPI
 177 CcSetReadAheadGranularity (
 178         IN      PFILE_OBJECT    FileObject,
 179         IN      ULONG           Granularity
 180         )
 181 {
 182     static ULONG Warn;
 183
 184     CCTRACE(CC_API_DEBUG, "FileObject=%p Granularity=%lu\n",
 185         FileObject, Granularity);
 186
 187     if (!Warn++) UNIMPLEMENTED;
 188 }