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iotrack.h

iotrack.h 1.1 KB
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  1. typedef struct MLock	MLock;
    2. 

  2. typedef	struct Iosect	Iosect;
    3. 

  3. typedef	struct Iotrack	Iotrack;
    4. 

  4. typedef struct Track	Track;
    5. 

  5. typedef struct Xfs	Xfs;
    6. 

  6. 

  7. struct MLock
    8. 

  8. {
    9. 

  9. 	char	key;
    10. 

  10. };
    11. 

  11. 

  12. struct Iosect
    13. 

  13. {
    14. 

  14. 	Iosect *next;
    15. 

  15. 	short	flags;
    16. 

  16. 	MLock	lock;
    17. 

  17. 	Iotrack *t;
    18. 

  18. 	uchar *	iobuf;
    19. 

  19. };
    20. 

  20. 

  21. struct Iotrack
    22. 

  22. {
    23. 

  23. 	short	flags;
    24. 

  24. 	Xfs *	xf;
    25. 

  25. 	long	addr;
    26. 

  26. 	Iotrack	*next;		/* in lru list */
    27. 

  27. 	Iotrack	*prev;
    28. 

  28. 	Iotrack	*hnext;		/* in hash list */
    29. 

  29. 	Iotrack	*hprev;
    30. 

  30. 	MLock	lock;
    31. 

  31. 	int	ref;
    32. 

  32. 	Track	*tp;
    33. 

  33. };
    34. 

  34. 

  35. enum{
    36. 

  36. 	Sectorsize = 512,
    37. 

  37. 	Sect2trk = 9,
    38. 

  38. 	Trksize = Sectorsize*Sect2trk
    39. 

  39. };
    40. 

  40. 

  41. struct Track
    42. 

  42. {
    43. 

  43. 	Iosect *p[Sect2trk];
    44. 

  44. 	uchar	buf[Sect2trk][Sectorsize];
    45. 

  45. };
    46. 

  46. 

  47. #define	BMOD		(1<<0)
    48. 

  48. #define	BIMM		(1<<1)
    49. 

  49. #define	BSTALE		(1<<2)
    50. 

  50. 

  51. Iosect*	getiosect(Xfs*, long, int);
    52. 

  52. Iosect*	getosect(Xfs*, long);
    53. 

  53. Iosect*	getsect(Xfs*, long);
    54. 

  54. Iosect*	newsect(void);
    55. 

  55. Iotrack*	getiotrack(Xfs*, long);
    56. 

  56. int	canmlock(MLock*);
    57. 

  57. int	devcheck(Xfs*);
    58. 

  58. int	devread(Xfs*, long, void*, long);
    59. 

  59. int	devwrite(Xfs*, long, void*, long);
    60. 

  60. int	tread(Iotrack*);
    61. 

  61. int	twrite(Iotrack*);
    62. 

  62. void	freesect(Iosect*);
    63. 

  63. void	iotrack_init(void);
    64. 

  64. void	mlock(MLock*);
    65. 

  65. void	purgebuf(Xfs*);
    66. 

  66. void	purgetrack(Iotrack*);
    67. 

  67. void	putsect(Iosect*);
    68. 

  68. void	sync(void);
    69. 

  69. void	unmlock(MLock*);
    70.