rom/filesys/SFS/FS/transactions.h

   1 #ifndef _TRANSACTIONS_H
   2 #define _TRANSACTIONS_H
   3
   4 #include <exec/types.h>
   5 #include <libraries/iffparse.h>
   6 #include "blockstructure.h"
   7 #include "redblacktree.h"
   8
   9 /* Operation   : A single block modification
  10    Transaction : A series of block modifications which together result in a valid disk */
  11
  12 struct OperationInformation {
  13   UWORD length;     /* Length in bytes of the compressed data. */
  14   BLCK blckno;
  15   UBYTE bits;       /* See defines below. */
  16   UBYTE data[0];
  17 };
  18
  19 /* Defines for bits: */
  20
  21 #define OI_EMPTY (1)   /* When set indicates that this block has no original. */
  22 #define OI_DELETE (2)  /* When set indicates that this block does not need to be written
  23                           anymore (ie, when blocks become unused and marked free). */
  24
  25
  26 struct Operation {
  27   struct Operation *left;
  28   struct Operation *right;
  29   struct Operation *parent;
  30   #ifdef CHECKCODE_TRANSACTIONS
  31   UWORD magicvalue;
  32   #endif
  33   NodeColor color;
  34   UBYTE new;
  35
  36 //  struct Operation *next;
  37 //  struct Operation *previous;
  38
  39   struct OperationInformation oi;
  40 };
  41
  42
  43 #define TRANSACTIONSTORAGE_ID   AROS_LONG2BE(MAKE_ID('T','R','S','T'))
  44 #define TRANSACTIONFAILURE_ID   AROS_LONG2BE(MAKE_ID('T','R','F','A'))
  45 #define TRANSACTIONOK_ID        AROS_LONG2BE(MAKE_ID('T','R','O','K'))
  46
  47 /* The blocks used for storing the Transaction buffer are linked in a
  48    singly linked list.  The data they hold is a direct copy of all
  49    Transaction data. */
  50
  51 struct fsTransactionStorage {
  52   struct fsBlockHeader bheader;
  53
  54   BLCK be_next;
  55
  56   UBYTE data[0];
  57 };
  58
  59
  60 struct fsTransactionFailure {
  61   struct fsBlockHeader bheader;
  62
  63   BLCK be_firsttransaction;
  64 };
  65
  66 #endif // _TRANSACTIONS_H