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| Rev 3561 | Rev 3588 | ||
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| Line 42... | Line 42... | ||
| 42 | #include <futex.h> |
42 | #include <futex.h> |
| 43 | #include <rwlock.h> |
43 | #include <rwlock.h> |
| 44 | #include <libadt/hash_table.h> |
44 | #include <libadt/hash_table.h> |
| 45 | #include <libadt/list.h> |
45 | #include <libadt/list.h> |
| 46 | 46 | ||
| - | 47 | typedef unsigned bn_t; /**< Block number type. */ |
|
| - | 48 | ||
| 47 | typedef struct block { |
49 | typedef struct block { |
| 48 | /** Futex protecting the reference count. */ |
50 | /** Futex protecting the reference count. */ |
| 49 | futex_t lock; |
51 | futex_t lock; |
| 50 | /** Number of references to the block_t structure. */ |
52 | /** Number of references to the block_t structure. */ |
| 51 | unsigned refcnt; |
53 | unsigned refcnt; |
| Line 54... | Line 56... | ||
| 54 | /** Readers / Writer lock protecting the contents of the block. */ |
56 | /** Readers / Writer lock protecting the contents of the block. */ |
| 55 | rwlock_t contents_lock; |
57 | rwlock_t contents_lock; |
| 56 | /** Handle of the device where the block resides. */ |
58 | /** Handle of the device where the block resides. */ |
| 57 | dev_handle_t dev_handle; |
59 | dev_handle_t dev_handle; |
| 58 | /** Block offset on the block device. Counted in 'size'-byte blocks. */ |
60 | /** Block offset on the block device. Counted in 'size'-byte blocks. */ |
| 59 | off_t boff; |
61 | bn_t boff; |
| 60 | /** Size of the block. */ |
62 | /** Size of the block. */ |
| 61 | size_t size; |
63 | size_t size; |
| 62 | /** Link for placing the block into the free block list. */ |
64 | /** Link for placing the block into the free block list. */ |
| 63 | link_t free_link; |
65 | link_t free_link; |
| 64 | /** Link for placing the block into the block hash table. */ |
66 | /** Link for placing the block into the block hash table. */ |
| Line 73... | Line 75... | ||
| 73 | extern int block_bb_read(dev_handle_t, off_t, size_t); |
75 | extern int block_bb_read(dev_handle_t, off_t, size_t); |
| 74 | extern void *block_bb_get(dev_handle_t); |
76 | extern void *block_bb_get(dev_handle_t); |
| 75 | 77 | ||
| 76 | extern int block_cache_init(dev_handle_t, size_t, unsigned); |
78 | extern int block_cache_init(dev_handle_t, size_t, unsigned); |
| 77 | 79 | ||
| 78 | extern block_t *block_get(dev_handle_t, off_t); |
80 | extern block_t *block_get(dev_handle_t, bn_t); |
| 79 | extern void block_put(block_t *); |
81 | extern void block_put(block_t *); |
| 80 | 82 | ||
| 81 | extern int block_read(int, off_t *, size_t *, off_t *, void *, size_t, size_t); |
83 | extern int block_read(int, off_t *, size_t *, off_t *, void *, size_t, size_t); |
| 82 | 84 | ||
| 83 | #endif |
85 | #endif |