rom/filesys/SFS/FS/locks.h

   1 #ifndef _LOCKS_H
   2 #define _LOCKS_H
   3
   4 #include <dos/dos.h>
   5 #include <exec/types.h>
   6 #include "nodes.h"
   7
   8 struct ExtFileLock
   9 {
  10   BPTR  link;
  11   IPTR  objectnode;
  12   LONG  access;
  13   struct MsgPort *task;
  14   BPTR  volume;
  15   /* structure above is the same as the FileLock structure */
  16
  17   struct ExtFileLock *next;
  18   struct ExtFileLock *prev;
  19   ULONG id;
  20
  21   struct GlobalHandle *gh;
  22
  23   /* EXAMINE_OBJECT and EXAMINE_NEXT use these: */
  24
  25   NODE  currentnode;
  26   NODE  nextnode;  /* ObjectNode number, 0 means get first entry */
  27   BLCK  nextnodeblock;
  28
  29   /* Used to keep track of the filepointer. */
  30
  31   BLCK  curextent;     /* This can be zero to indicate the start of the file, even if there ARE extents! */
  32   ULONG extentoffset;  /* Byte offset in current extent.  0 = start of extent */
  33   ULONG offset;        /* Byte offset in entire file.  0 = start of file */
  34
  35   /* If the file-ptr is located at the first byte AFTER the end of the file
  36      (so the file can be extended) then offset==size.  curextent should in that
  37      case be the last link the file has (or zero if it has no links) */
  38
  39   /* Used for setting the Roving Block ptr when a file is closed which was
  40      extended.  A value of zero indicates the file was not extended.  Otherwise
  41      the value is the last block of the file + 1. */
  42
  43   ULONG lastextendedblock;
  44
  45   UBYTE bits;          /* EFL_MODIFIED : if file was newly created (FINDOUTPUT or FINDUPDATE) or
  46                                          modified by using ACTION_WRITE or ACTION_SET_FILE_SIZE
  47                                          then this bit is set.
  48
  49                           EFL_FILE     : When set, indicates that the lock refers to a file. */
  50
  51 };
  52
  53 #define EFL_MODIFIED  (1)
  54 #define EFL_FILE      (2)
  55
  56
  57
  58 struct GlobalHandle {
  59   /* Structure which stores information on a specific file.  This structure
  60      is pointed to by all locks which currently have this file open. */
  61
  62   struct MinNode node;
  63
  64   ULONG count;       /* Number of locks referencing this globalhandle */
  65
  66   NODE  objectnode;  /* The file's ObjectNode */
  67   ULONG size;        /* Size of the file in bytes */
  68   ULONG protection;  /* The protection bits of the file */
  69
  70   ULONG data;        /* The first data block of this file (ExtentBNode) */
  71
  72   ULONG pad1;        /* Extra bytes to prevent weird CVision3D monitor crash... */
  73   ULONG pad2;
  74
  75   // BLCK  startblock; /* First block of this link */
  76   // UWORD blocks;     /* Blocks in this link */
  77
  78 };
  79
  80 #endif // _LOCKS_H