Rev 683 | Rev 756 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 377 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 13 | * documentation and/or other materials provided with the distribution. |
||
| 14 | * - The name of the author may not be used to endorse or promote products |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | #ifndef __BUDDY_H__ |
||
| 30 | #define __BUDDY_H__ |
||
| 31 | |||
| 32 | #include <arch/types.h> |
||
| 33 | #include <typedefs.h> |
||
| 34 | |||
| 378 | jermar | 35 | #define BUDDY_SYSTEM_INNER_BLOCK 0xff |
| 36 | |||
| 489 | jermar | 37 | /** Buddy system operations to be implemented by each implementations. */ |
| 381 | jermar | 38 | struct buddy_system_operations { |
| 489 | jermar | 39 | link_t *(* find_buddy)(buddy_system_t *, link_t *); /**< Return pointer to left-side or right-side buddy for block passed as argument. */ |
| 40 | link_t *(* bisect)(buddy_system_t *, link_t *); /**< Bisect the block passed as argument and return pointer to the new right-side buddy. */ |
||
| 41 | link_t *(* coalesce)(buddy_system_t *, link_t *, link_t *); /**< Coalesce two buddies into a bigger block. */ |
||
| 42 | void (*set_order)(buddy_system_t *, link_t *, __u8); /**< Set order of block passed as argument. */ |
||
| 43 | __u8 (*get_order)(buddy_system_t *, link_t *); /**< Return order of block passed as argument. */ |
||
| 533 | bondari | 44 | void (*mark_busy)(buddy_system_t *, link_t *); /**< Mark block as busy */ |
| 377 | jermar | 45 | }; |
| 46 | |||
| 47 | struct buddy_system { |
||
| 48 | __u8 max_order; |
||
| 49 | link_t *order; |
||
| 381 | jermar | 50 | buddy_system_operations_t *op; |
| 489 | jermar | 51 | void *data; /**< Pointer to be used by the implementation. */ |
| 377 | jermar | 52 | }; |
| 53 | |||
| 489 | jermar | 54 | extern buddy_system_t *buddy_system_create(__u8 max_order, buddy_system_operations_t *op, void *data); |
| 377 | jermar | 55 | extern link_t *buddy_system_alloc(buddy_system_t *b, __u8 i); |
| 533 | bondari | 56 | extern bool buddy_system_can_alloc(buddy_system_t *b, __u8 order); |
| 377 | jermar | 57 | extern void buddy_system_free(buddy_system_t *b, link_t *block); |
| 686 | bondari | 58 | extern void buddy_system_structure_print(buddy_system_t *b, size_t elem_size); |
| 377 | jermar | 59 | |
| 683 | bondari | 60 | |
| 377 | jermar | 61 | #endif |