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This commit is contained in:
Bahadir Balban
2008-01-13 13:53:52 +00:00
commit e2b791a3d8
789 changed files with 95825 additions and 0 deletions
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51
tasks/mm0/tests/idpool_test/bit.h Normal file
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#ifndef __LIB_BIT_H__
#define __LIB_BIT_H__
/* Minimum excess needed for word alignment */
#define SZ_WORD sizeof(unsigned int)
#define WORD_BITS 32
#define WORD_BITS_LOG2 5
#define BITWISE_GETWORD(x) ((x) >> WORD_BITS_LOG2) /* Divide by 32 */
#define BITWISE_GETBIT(x) (1 << ((x) % WORD_BITS))
typedef unsigned int u32;
unsigned int __clz(unsigned int bitvector);
int find_and_set_first_free_bit(u32 *word, unsigned int lastbit);
int check_and_clear_bit(u32 *word, int bit);
int check_and_clear_contig_bits(u32 *word, int first, int nbits);
int find_and_set_first_free_contig_bits(u32 *word, unsigned int limit,
int nbits);
/* Set */
static inline void setbit(unsigned int *w, unsigned int flags)
{
*w |= flags;
}
/* Clear */
static inline void clrbit(unsigned int *w, unsigned int flags)
{
*w &= ~flags;
}
/* Test */
static inline int tstbit(unsigned int *w, unsigned int flags)
{
return *w & flags;
}
/* Test and clear */
static inline int tstclr(unsigned int *w, unsigned int flags)
{
int res = tstbit(w, flags);
clrbit(w, flags);
return res;
}
#endif /* __LIB_BIT_H__ */