35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
|
#ifndef _BITMAP_H
|
||
|
|
#define _BITMAP_H
|
||
|
|
|
||
|
|
/* Bit map operations to manipulate bits of a simple mask variable. */
|
||
|
|
#define bit_set(mask, n) ((mask) |= (1 << (n)))
|
||
|
|
#define bit_unset(mask, n) ((mask) &= ~(1 << (n)))
|
||
|
|
#define bit_isset(mask, n) ((mask) & (1 << (n)))
|
||
|
|
#define bit_empty(mask) ((mask) = 0)
|
||
|
|
#define bit_fill(mask) ((mask) = ~0)
|
||
|
|
|
||
|
|
/* Definitions previously in kernel/const.h */
|
||
|
|
#define BITCHUNK_BITS (sizeof(bitchunk_t) * CHAR_BIT)
|
||
|
|
#define BITMAP_CHUNKS(nr_bits) (((nr_bits)+BITCHUNK_BITS-1)/BITCHUNK_BITS)
|
||
|
|
#define MAP_CHUNK(map,bit) (map)[((bit)/BITCHUNK_BITS)]
|
||
|
|
#define CHUNK_OFFSET(bit) ((bit)%BITCHUNK_BITS)
|
||
|
|
#define GET_BIT(map,bit) ( MAP_CHUNK(map,bit) & (1 << CHUNK_OFFSET(bit) ))
|
||
|
|
#define SET_BIT(map,bit) ( MAP_CHUNK(map,bit) |= (1 << CHUNK_OFFSET(bit) ))
|
||
|
|
#define UNSET_BIT(map,bit) ( MAP_CHUNK(map,bit) &= ~(1 << CHUNK_OFFSET(bit) ))
|
||
|
|
|
||
|
|
#if defined(CONFIG_SMP) && defined(__GNUC__)
|
||
|
|
#ifndef __ASSEMBLY__
|
||
|
|
static inline void bits_fill(bitchunk_t * chunks, unsigned bits)
|
||
|
|
{
|
||
|
|
unsigned c, cnt;
|
||
|
|
|
||
|
|
cnt = BITMAP_CHUNKS(bits);
|
||
|
|
for (c = 0; c < cnt; c++)
|
||
|
|
bit_fill(chunks[c]);
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* _BITMAP_H */
|