reactos/ntoskrnl/include/internal/cc.h

   1 #ifndef __INCLUDE_INTERNAL_CC_H
   2 #define __INCLUDE_INTERNAL_CC_H
   3 /* $Id: cc.h,v 1.16 2002/09/08 10:23:21 chorns Exp $ */
   4 #include <ddk/ntifs.h>
   5
   6 typedef struct _BCB
   7 {
   8   LIST_ENTRY BcbSegmentListHead;
   9   PFILE_OBJECT FileObject;
  10   ULONG CacheSegmentSize;
  11   LARGE_INTEGER AllocationSize;
  12   LARGE_INTEGER FileSize;
  13   KSPIN_LOCK BcbLock;
  14   ULONG RefCount;
  15 } BCB;
  16
  17 typedef struct _CACHE_SEGMENT
  18 {
  19   /* Base address of the region where the cache segment data is mapped. */
  20   PVOID BaseAddress;
  21   /*
  22    * Memory area representing the region where the cache segment data is
  23    * mapped.
  24    */
  25   struct _MEMORY_AREA* MemoryArea;
  26   /* Are the contents of the cache segment data valid. */
  27   BOOLEAN Valid;
  28   /* Are the contents of the cache segment data newer than those on disk. */
  29   BOOLEAN Dirty;
  30   ULONG MappedCount;
  31   /* Entry in the list of segments for this BCB. */
  32   LIST_ENTRY BcbSegmentListEntry;
  33   /* Entry in the list of segments which are dirty. */
  34   LIST_ENTRY DirtySegmentListEntry;
  35   /* Entry in the list of segments. */
  36   LIST_ENTRY CacheSegmentListEntry;
  37   LIST_ENTRY CacheSegmentLRUListEntry;
  38   /* Offset in the file which this cache segment maps. */
  39   ULONG FileOffset;
  40   /* Lock. */
  41   FAST_MUTEX Lock;
  42   /* Number of references. */
  43   ULONG ReferenceCount;
  44   /* Pointer to the BCB for the file which this cache segment maps data for. */
  45   PBCB Bcb;
  46   /* Pointer to the next cache segment in a chain. */
  47   struct _CACHE_SEGMENT* NextInChain;
  48 } CACHE_SEGMENT;
  49
  50 VOID STDCALL
  51 CcMdlReadCompleteDev (IN        PMDL            MdlChain,
  52                       IN        PDEVICE_OBJECT  DeviceObject);
  53 NTSTATUS
  54 CcRosGetCacheSegment(PBCB Bcb,
  55                   ULONG FileOffset,
  56                   PULONG BaseOffset,
  57                   PVOID* BaseAddress,
  58                   PBOOLEAN UptoDate,
  59                   PCACHE_SEGMENT* CacheSeg);
  60 VOID
  61 CcInitView(VOID);
  62
  63
  64 NTSTATUS STDCALL CcRosFreeCacheSegment(PBCB, PCACHE_SEGMENT);
  65
  66 NTSTATUS ReadCacheSegment(PCACHE_SEGMENT CacheSeg);
  67
  68 NTSTATUS WriteCacheSegment(PCACHE_SEGMENT CacheSeg);
  69
  70 VOID CcInit(VOID);
  71 NTSTATUS
  72 CcRosUnmapCacheSegment(PBCB Bcb, ULONG FileOffset, BOOLEAN NowDirty);
  73 NTSTATUS
  74 CcRosSuggestFreeCacheSegment(PBCB Bcb, ULONG FileOffset, BOOLEAN NowDirty);
  75 NTSTATUS
  76 CcRosGetCacheSegmentChain(PBCB Bcb,
  77                           ULONG FileOffset,
  78                           ULONG Length,
  79                           PCACHE_SEGMENT* CacheSeg);
  80 VOID CcInitCacheZeroPage(VOID);
  81 NTSTATUS
  82 CcRosMarkDirtyCacheSegment(PBCB Bcb, ULONG FileOffset);
  83 NTSTATUS
  84 CcRosFlushDirtyPages(ULONG Target, PULONG Count);
  85
  86 VOID CcRosDereferenceCache(PFILE_OBJECT FileObject);
  87 VOID CcRosReferenceCache(PFILE_OBJECT FileObject);
  88
  89 #endif