rom/filesys/cdfs/cdfs.h

   1 /*
   2  * Copyright (C) 2013, The AROS Development Team
   3  * All right reserved.
   4  * Author: Jason S. McMullan <jason.mcmullan@gmail.com>
   5  *
   6  * Licensed under the AROS PUBLIC LICENSE (APL) Version 1.1
   7  */
   8
   9 #ifndef CDFS_H
  10 #define CDFS_H
  11
  12 #include <exec/execbase.h>
  13 #include <dos/dosextens.h>
  14
  15 struct BCache;
  16 struct CDFSDevice;
  17
  18 #ifndef ARRAY_SIZE
  19 #define ARRAY_SIZE(x)   ((sizeof(x)/sizeof((x)[0])))
  20 #endif
  21
  22 struct CDFS {
  23     struct SignalSemaphore cb_Semaphore;    /* Master CD controller */
  24     struct ExecBase       *cb_SysBase;
  25     struct Library        *cb_UtilityBase;
  26
  27     struct List            cb_Devices;
  28     struct List            cb_Volumes;
  29 };
  30
  31 /* Allocated by the volume - CDFS does not alloc nor free it! */
  32 struct CDFSLock {
  33     struct MinNode       cl_Node;           /* For use by CDFS */
  34     struct FileLock      cl_FileLock;       /* fl_Key must be unique per file - set by filesystem */
  35     struct FileInfoBlock cl_FileInfoBlock;
  36     /* Private filesystem data follows */
  37 };
  38
  39 #undef  container_of
  40 #define container_of(ptr, type, member) ({          \
  41     const typeof(((type *)0)->member) *__mptr = (ptr);    \
  42              (type *)((char *)__mptr - offsetof(type, member)); })
  43
  44
  45 #define B_LOCK(x)   (((BPTR)(x) == BNULL) ? NULL : container_of(BADDR(x), struct CDFSLock, cl_FileLock))
  46 #define MKB_LOCK(x) MKBADDR(&(x)->cl_FileLock)
  47
  48 struct CDFSVolume;
  49
  50 struct CDFSOps {
  51     LONG      op_Type;
  52     LONG    (*op_Mount)(struct CDFSVolume *vol);
  53     LONG    (*op_Unmount)(struct CDFSVolume *vol);
  54
  55     LONG    (*op_Locate)(struct CDFSVolume *vol, struct CDFSLock *ilock, CONST_STRPTR file, ULONG mode, struct CDFSLock **nlock);
  56     VOID    (*op_Close)(struct CDFSVolume *vol, struct CDFSLock *ilock);
  57     LONG    (*op_ExamineNext)(struct CDFSVolume *vol, struct CDFSLock *ifile, struct FileInfoBlock *fib);
  58     LONG    (*op_Seek)(struct CDFSVolume *vol, struct CDFSLock *ifile, SIPTR pos, LONG mode, SIPTR *oldpos);
  59     LONG    (*op_Read)(struct CDFSVolume *vol, struct CDFSLock *ifile, APTR buff, SIPTR len, SIPTR *actual);
  60 };
  61
  62 struct CDFSVolume {
  63     struct MinNode        cv_Node;
  64     struct DeviceList     cv_DosVolume;   /* ISOFS: dl_VolumeDate, dl_VolumeType, dl_Name */
  65     struct CDFS          *cv_CDFSBase;    /* CDFS: Main reference */
  66     struct CDFSDevice    *cv_Device;      /* CDFS: Current device */
  67     struct List           cv_FileLocks;   /* CDFS: Lock list */
  68     struct InfoData       cv_InfoData;    /* ISOFS: Data about filesystem */
  69     const struct CDFSOps *cv_Ops;         /* ISOFS: Operations */
  70     APTR                  cv_Private;     /* ISOFS: Volume private data */
  71 };
  72
  73 #define B_VOLUME(x)   (((BPTR)(x) == BNULL) ? NULL : container_of(BADDR(x), struct CDFSVolume, cv_DosVolume))
  74 #define MKB_VOLUME(x) MKBADDR(&(x)->cv_DosVolume)
  75
  76
  77 struct CDFSDevice {
  78     struct MinNode      cd_Node;
  79     struct BCache      *cd_BCache;
  80     struct CDFSVolume  *cd_Volume;      /* NULL if no volume is present */
  81 };
  82
  83
  84 #define SysBase (cdfs->cb_SysBase)
  85 #define UtilityBase (cdfs->cb_UtilityBase)
  86
  87 LONG CDFS_Handler(struct ExecBase *sysBase);
  88
  89 #endif /* CDFS_H */