v4.0/src/INC/FASTOPEN.INC

   1 ;
   2 ; EXPORT DATE: 9/11
   3 ;Equates for FASTOPEN.
   4
   5 ;FASTOPEN NAME CACHING Subfunctions
   6 FONC_Look_up    equ     1
   7 FONC_insert     equ     2
   8 FONC_delete     equ     3
   9 FONC_update     equ     4
  10 FONC_purge      equ     5               ;reserved for the future use.
  11
  12 ;FASTOPEN EXTENT  CACHING Subfunctions
  13 FSK_Open       equ     11                                              ;AN000;
  14 FSK_Close      equ     12                                              ;AN000;
  15 FSK_Delete     equ     13                                              ;AN000;
  16 FSK_Lookup     equ     14                                              ;AN000;
  17 FSK_Insert     equ     15                                              ;AN000;
  18 FSK_Trunc      equ     16                                              ;AN000;
  19
  20 HeaderSize     equ    8        ; size of file header (8 bytes)         ;AN000;
  21 ExtendSize     equ    8        ; size of extend (8 bytes)              ;AN000;
  22 Num_Of_Pages   equ    1        ; number of pages                       ;AN000;
  23 Num_Of_Segs    equ    2        ; number of frame segments              ;AN000;
  24 Stayresident  equ    04ch     ; terminate and stay resident function code
  25
  26
  27 ;Equates used in DOS.
  28 FastOpen_Set           equ     00000001B
  29 FastOpen_Reset         equ     11111110B
  30 Lookup_Success         equ     00000010B
  31 Lookup_Reset           equ     11111101B
  32 Special_Fill_Set       equ     00000100B
  33 Special_Fill_Reset     equ     11111011B
  34 No_Lookup              equ     00001000B
  35 Set_For_Search         equ     00010000B             ;DCR 167
  36
  37
  38 ;============= FastOpen Data Structures =====================
  39
  40 Fastopen_Entry  STRUC                   ;Fastopen Entry pointer in DOS
  41 Fastopen_Entry_size     dw      4       ;size of the following
  42 Fastopen_Name_Caching   dd      ?
  43 ;Fastopen_FatChain_Caching dd     ?     ;reserved for future use
  44 Fastopen_Entry  ENDS
  45 ;
  46
  47
  48 CMPCT_DIR_INFO  STRUC                   ;compact version of Dir Info.
  49 CDI_file_name   db      11 dup (' ')
  50 CDI_file_attr   db      ?
  51 CDI_codepage    dw      ?
  52 CDI_extcluster  dw      ?
  53 CDI_attr2       db      ?
  54 CDI_time        dw      ?
  55 CDI_date        dw      ?
  56 CDI_cluster     dw      ?
  57 CDI_filesize    dd      ?
  58 CMPCT_DIR_INFO  ENDS
  59 ;
  60
  61 ORIG_DIR_INFO   STRUC
  62 ODI_head        db      17 dup (?)
  63 ODI_skip        db      5  dup (0)      ;reserved for DOS. FASTOPEN does not
  64 ODI_tail        db      10 dup (?)      ;  use ODI_skip part.
  65 ORIG_DIR_INFO   ENDS
  66 ;
  67
  68 ODI_head_leng   equ     17
  69 ODI_skip_leng   equ     5
  70 ODI_tail_leng   equ     10
  71 ;
  72
  73 FASTOPEN_EXTENDED_INFO  STRUC
  74 FEI_dirpos      db      0
  75 FEI_dirsec      dd      0
  76 FEI_clusnum     dw      0
  77 FEI_lastent     dw      0               ; for search first
  78 FEI_dirstart    dw      0               ; for search first
  79 FASTOPEN_EXTENDED_INFO  ENDS
  80 ;
  81
  82 NAME_RECORD     STRUC
  83 nLRU_ptr        dw      -1
  84 nMRU_ptr        dw      -1              ;reverse of nLRU_ptr
  85 nChild_ptr      dw      -1
  86 nSibling_ptr    dw      -1
  87 nBackward_ptr   dw      -1              ;points to preceding node
  88 nCmpct_Dir_Info db      size Cmpct_Dir_Info dup (' ')
  89 nExtended_Info  db      size Fastopen_Extended_Info dup (?)
  90 NAME_RECORD     ENDS
  91 ;
  92
  93 DRIVE_CACHE_HEADER      STRUC           ;drive cache header
  94 DCH_LRU_ROOT     dw      0              ;Header of the LRU chain of this drive
  95 DCH_MRU_ROOT     dw      0              ;offset to the last entry of LRU chain
  96 DCH_Child_ptr    dw      -1             ;the first child in Name cache seg.
  97 DCH_Sibling_ptr  dw      -1             ;points to the next drive cache header
  98 DCH_Drive_letter db     'C'             ;drive letter
  99 DCH_Num_Entries  dw      0              ;Number of entries in the Name cache.
 100 DCH_Name_Buff    dw      0              ;pointer to name cahe buffer
 101 DRIVE_CACHE_HEADER      ENDS
 102 ;
 103 \f
 104
 105
 106
 107
 108 ;======== FAST SEEK FUNCTION  DATA  STRUCTURES =======================
 109
 110 DRIVE_HEADER    STRUC              ; Drive header structure             ;AN000;
 111 Drive_Number         dw     0      ; drive number                       ;AN000;
 112 Extent_Count         dw     0      ; reserved for debugging
 113 MRU_Hdr_Ptr          dw     0      ; pointer to OPEN Queue
 114 Free_ptr             dw     0      ; pointer to FREE buffer             ;AN000;
 115 Close_Ptr            dw     0      ; pointer to CLOSE Queue          ;AN000;
 116 Buff_Size            dw     0      ; cache buffer size including header ;AN000;
 117 Free_Size            dw     0      ; size of Free area in bytes
 118 Next_Drv_Hdr_Ptr     dw     0      ; pointer to next drive header
 119 DRIVE_HEADER   ENDS
 120
 121
 122
 123 FILE_HEADER     STRUC              ; File header structure              ;AN000;
 124 FH_Phys_Clus_Num     dw     0      ; starting physcial clustnum of file ;AN000;
 125 FH_Refer_Count       dw     0      ; reference count                    ;AN000;
 126 FH_Next_Extn_Ptr     dw     0      ; pointer to first extent of the file;AN000;
 127 FH_Next_Hdr_Ptr      dw     0      ; pointer to next file header        ;AN000;
 128 FH_MRU_Extn_Ptr      dw     0      ; pointer to  MRU extent
 129                      dw     0
 130                      dw     0
 131                      dw     0
 132 FILE_HEADER     ENDS                                                    ;AN000;
 133
 134
 135
 136 EXTENT_HEADER   STRUC              ; extend header structure            ;AN000;
 137 EH_Logic_Clus_Num    dw     0      ; starting logical clus num of extent;AN000;
 138 EH_Phys_Clus_Num     dw     0      ; starting physical clus numof  extnt;AN000;
 139 EH_Count             dw     0      ; range of logical clusnum in the extnt
 140 EH_Next_Extn_Ptr     dw     0      ; pointer to next extent             ;AN000;
 141 EH_Prev_Extn_Ptr     dw     0      ; pointer to previous extent  ;AN000;
 142 EH_Next_LRU_Ptr      dw     0      ; pointer to next LRU extent
 143 EH_Prev_LRU_Ptr      dw     0      ; pointer tp previous LRU extent
 144                      dw     0
 145 EXTENT_HEADER   ENDS
 146
 147
 148