reactos/ntoskrnl/include/internal/cc.h

   1 #ifndef __INCLUDE_INTERNAL_CC_H
   2 #define __INCLUDE_INTERNAL_CC_H
   3 /* $Id: cc.h,v 1.8 2001/12/29 14:32:22 dwelch 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 } BCB;
  15
  16 typedef struct _CACHE_SEGMENT
  17 {
  18   /* Base address of the region where the cache segment data is mapped. */
  19   PVOID BaseAddress;
  20   /* Memory area representing the region where the cache segment data is mapped. */
  21   struct _MEMORY_AREA* MemoryArea;
  22   /* Are the contents of the cache segment data valid. */
  23   BOOLEAN Valid;
  24   /* Are the contents of the cache segment data newer than those on disk. */
  25   BOOLEAN Dirty;
  26   ULONG MappedCount;
  27   /* Entry in the list of segments for this BCB. */
  28   LIST_ENTRY BcbSegmentListEntry;
  29   /* Entry in the list of segments which are dirty. */
  30   LIST_ENTRY DirtySegmentListEntry;
  31   /* Entry in the list of segments. */
  32   LIST_ENTRY CacheSegmentListEntry;
  33   LIST_ENTRY CacheSegmentLRUListEntry;
  34   /* Offset in the file which this cache segment maps. */
  35   ULONG FileOffset;
  36   /* Lock. */
  37   FAST_MUTEX Lock;
  38   /* Number of references. */
  39   ULONG ReferenceCount;
  40   /* Pointer to the BCB for the file which this cache segment maps data for. */
  41   PBCB Bcb;
  42 } CACHE_SEGMENT;
  43
  44 VOID STDCALL
  45 CcMdlReadCompleteDev (IN        PMDL            MdlChain,
  46                       IN        PDEVICE_OBJECT  DeviceObject);
  47 NTSTATUS
  48 CcRosGetCacheSegment(PBCB Bcb,
  49                   ULONG FileOffset,
  50                   PULONG BaseOffset,
  51                   PVOID* BaseAddress,
  52                   PBOOLEAN UptoDate,
  53                   PCACHE_SEGMENT* CacheSeg);
  54 VOID
  55 CcInitView(VOID);
  56
  57
  58 NTSTATUS STDCALL CcRosFreeCacheSegment(PBCB, PCACHE_SEGMENT);
  59
  60 NTSTATUS ReadCacheSegment(PCACHE_SEGMENT CacheSeg);
  61
  62 NTSTATUS WriteCacheSegment(PCACHE_SEGMENT CacheSeg);
  63
  64 VOID CcInit(VOID);
  65
  66 #endif