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| 32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
| 33 | #include <typedefs.h> |
33 | #include <typedefs.h> |
| 34 | 34 | ||
| 35 | #define BUDDY_SYSTEM_INNER_BLOCK 0xff |
35 | #define BUDDY_SYSTEM_INNER_BLOCK 0xff |
| 36 | 36 | ||
| - | 37 | /** Buddy system operations to be implemented by each implementations. */ |
|
| 37 | struct buddy_system_operations { |
38 | struct buddy_system_operations { |
| 38 | link_t *(* find_buddy)(link_t *); /**< Return pointer to left-side or right-side buddy for block passed as argument. */ |
39 | link_t *(* find_buddy)(buddy_system_t *, link_t *); /**< Return pointer to left-side or right-side buddy for block passed as argument. */ |
| 39 | link_t *(* bisect)(link_t *); /**< Bisect the block passed as argument and return pointer to the new right-side buddy. */ |
40 | link_t *(* bisect)(buddy_system_t *, link_t *); /**< Bisect the block passed as argument and return pointer to the new right-side buddy. */ |
| 40 | link_t *(* coalesce)(link_t *, link_t *); /**< Coalesce two buddies into a bigger block. */ |
41 | link_t *(* coalesce)(buddy_system_t *, link_t *, link_t *); /**< Coalesce two buddies into a bigger block. */ |
| 41 | void (*set_order)(link_t *, __u8); /**< Set order of block passed as argument. */ |
42 | void (*set_order)(buddy_system_t *, link_t *, __u8); /**< Set order of block passed as argument. */ |
| 42 | __u8 (*get_order)(link_t *); /**< Return order of block passed as argument. */ |
43 | __u8 (*get_order)(buddy_system_t *, link_t *); /**< Return order of block passed as argument. */ |
| 43 | }; |
44 | }; |
| 44 | 45 | ||
| 45 | struct buddy_system { |
46 | struct buddy_system { |
| 46 | __u8 max_order; |
47 | __u8 max_order; |
| 47 | link_t *order; |
48 | link_t *order; |
| 48 | buddy_system_operations_t *op; |
49 | buddy_system_operations_t *op; |
| - | 50 | void *data; /**< Pointer to be used by the implementation. */ |
|
| 49 | }; |
51 | }; |
| 50 | 52 | ||
| 51 | extern buddy_system_t *buddy_system_create(__u8 max_order, buddy_system_operations_t *op); |
53 | extern buddy_system_t *buddy_system_create(__u8 max_order, buddy_system_operations_t *op, void *data); |
| 52 | extern link_t *buddy_system_alloc(buddy_system_t *b, __u8 i); |
54 | extern link_t *buddy_system_alloc(buddy_system_t *b, __u8 i); |
| 53 | extern void buddy_system_free(buddy_system_t *b, link_t *block); |
55 | extern void buddy_system_free(buddy_system_t *b, link_t *block); |
| 54 | 56 | ||
| 55 | #endif |
57 | #endif |