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| 41 | #define BUDDY_SYSTEM_INNER_BLOCK 0xff |
41 | #define BUDDY_SYSTEM_INNER_BLOCK 0xff |
| 42 | 42 | ||
| 43 | /** Buddy system operations to be implemented by each implementation. */ |
43 | /** Buddy system operations to be implemented by each implementation. */ |
| 44 | struct buddy_system_operations { |
44 | struct buddy_system_operations { |
| 45 | link_t *(* find_buddy)(buddy_system_t *, link_t *); /**< Return pointer to left-side or right-side buddy for block passed as argument. */ |
45 | /** Return pointer to left-side or right-side buddy for block passed as |
| - | 46 | * argument. */ |
|
| - | 47 | link_t *(* find_buddy)(buddy_system_t *, link_t *); |
|
| 46 | link_t *(* bisect)(buddy_system_t *, link_t *); /**< Bisect the block passed as argument and return pointer to the new right-side buddy. */ |
48 | /** Bisect the block passed as argument and return pointer to the new |
| - | 49 | * right-side buddy. */ |
|
| - | 50 | link_t *(* bisect)(buddy_system_t *, link_t *); |
|
| - | 51 | /** Coalesce two buddies into a bigger block. */ |
|
| 47 | link_t *(* coalesce)(buddy_system_t *, link_t *, link_t *); /**< Coalesce two buddies into a bigger block. */ |
52 | link_t *(* coalesce)(buddy_system_t *, link_t *, link_t *); |
| - | 53 | /** Set order of block passed as argument. */ |
|
| 48 | void (*set_order)(buddy_system_t *, link_t *, uint8_t); /**< Set order of block passed as argument. */ |
54 | void (*set_order)(buddy_system_t *, link_t *, uint8_t); |
| - | 55 | /** Return order of block passed as argument. */ |
|
| 49 | uint8_t (*get_order)(buddy_system_t *, link_t *); /**< Return order of block passed as argument. */ |
56 | uint8_t (*get_order)(buddy_system_t *, link_t *); |
| - | 57 | /** Mark block as busy. */ |
|
| 50 | void (*mark_busy)(buddy_system_t *, link_t *); /**< Mark block as busy. */ |
58 | void (*mark_busy)(buddy_system_t *, link_t *); |
| - | 59 | /** Mark block as available. */ |
|
| 51 | void (*mark_available)(buddy_system_t *, link_t *); /**< Mark block as available. */ |
60 | void (*mark_available)(buddy_system_t *, link_t *); |
| 52 | /** Find parent of block that has given order */ |
61 | /** Find parent of block that has given order */ |
| 53 | link_t *(* find_block)(buddy_system_t *, link_t *, uint8_t); |
62 | link_t *(* find_block)(buddy_system_t *, link_t *, uint8_t); |
| 54 | void (* print_id)(buddy_system_t *, link_t *); |
63 | void (* print_id)(buddy_system_t *, link_t *); |
| 55 | }; |
64 | }; |
| 56 | 65 | ||
| 57 | struct buddy_system { |
66 | struct buddy_system { |
| 58 | uint8_t max_order; /**< Maximal order of block which can be stored by buddy system. */ |
67 | /** Maximal order of block which can be stored by buddy system. */ |
| - | 68 | uint8_t max_order; |
|
| 59 | link_t *order; |
69 | link_t *order; |
| 60 | buddy_system_operations_t *op; |
70 | buddy_system_operations_t *op; |
| 61 | void *data; /**< Pointer to be used by the implementation. */ |
71 | /** Pointer to be used by the implementation. */ |
| - | 72 | void *data; |
|
| 62 | }; |
73 | }; |
| 63 | 74 | ||
| 64 | extern void buddy_system_create(buddy_system_t *b, |
75 | extern void buddy_system_create(buddy_system_t *b, uint8_t max_order, |
| 65 | uint8_t max_order, |
- | |
| 66 | buddy_system_operations_t *op, void *data); |
76 | buddy_system_operations_t *op, void *data); |
| 67 | extern link_t *buddy_system_alloc(buddy_system_t *b, uint8_t i); |
77 | extern link_t *buddy_system_alloc(buddy_system_t *b, uint8_t i); |
| 68 | extern bool buddy_system_can_alloc(buddy_system_t *b, uint8_t order); |
78 | extern bool buddy_system_can_alloc(buddy_system_t *b, uint8_t order); |
| 69 | extern void buddy_system_free(buddy_system_t *b, link_t *block); |
79 | extern void buddy_system_free(buddy_system_t *b, link_t *block); |
| 70 | extern void buddy_system_structure_print(buddy_system_t *b, size_t elem_size); |
80 | extern void buddy_system_structure_print(buddy_system_t *b, size_t elem_size); |
| 71 | extern size_t buddy_conf_size(int max_order); |
81 | extern size_t buddy_conf_size(int max_order); |