Rev 4055 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1200 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2006 Jakub Jermar |
| 1200 | 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 | |||
| 1888 | jermar | 29 | /** @addtogroup genericadt |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
||
| 32 | /** @file |
||
| 33 | */ |
||
| 34 | |||
| 1888 | jermar | 35 | #ifndef KERN_BITMAP_H_ |
| 36 | #define KERN_BITMAP_H_ |
||
| 1200 | jermar | 37 | |
| 38 | #include <arch/types.h> |
||
| 39 | |||
| 1251 | jermar | 40 | #define BITS2BYTES(bits) (bits ? ((((bits)-1)>>3)+1) : 0) |
| 1200 | jermar | 41 | |
| 42 | typedef struct { |
||
| 1780 | jermar | 43 | uint8_t *map; |
| 4537 | trochtova | 44 | size_t bits; |
| 1200 | jermar | 45 | } bitmap_t; |
| 46 | |||
| 4537 | trochtova | 47 | extern void bitmap_initialize(bitmap_t *bitmap, uint8_t *map, size_t bits); |
| 48 | extern void bitmap_set_range(bitmap_t *bitmap, size_t start, size_t bits); |
||
| 49 | extern void bitmap_clear_range(bitmap_t *bitmap, size_t start, size_t bits); |
||
| 50 | extern void bitmap_copy(bitmap_t *dst, bitmap_t *src, size_t bits); |
||
| 1200 | jermar | 51 | |
| 4537 | trochtova | 52 | static inline int bitmap_get(bitmap_t *bitmap, size_t bit) |
| 4055 | trochtova | 53 | { |
| 54 | if(bit >= bitmap->bits) |
||
| 55 | return 0; |
||
| 4537 | trochtova | 56 | |
| 4055 | trochtova | 57 | return !! ((bitmap->map)[bit/8] & (1 << (bit & 7))); |
| 58 | } |
||
| 59 | |||
| 60 | |||
| 1200 | jermar | 61 | #endif |
| 1702 | cejka | 62 | |
| 1888 | jermar | 63 | /** @} |
| 1702 | cejka | 64 | */ |