source: branches/minix3-book/include/minix/bitmap.h@ 4

Last change on this file since 4 was 4, checked in by Mattia Monga, 13 years ago

Importazione sorgenti libro

File size: 356 bytes
Line 
1#ifndef _BITMAP_H
2#define _BITMAP_H
3
4/* Bit map operations to manipulate bits of a simple mask variable. */
5#define bit_set(mask, n) ((mask) |= (1 << (n)))
6#define bit_unset(mask, n) ((mask) &= ~(1 << (n)))
7#define bit_isset(mask, n) ((mask) & (1 << (n)))
8#define bit_empty(mask) ((mask) = 0)
9#define bit_fill(mask) ((mask) = ~0)
10
11#endif /* _BITMAP_H */
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