diff options
Diffstat (limited to 'ethtool-bitops.h')
| -rw-r--r-- | ethtool-bitops.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/ethtool-bitops.h b/ethtool-bitops.h new file mode 100644 index 0000000..b1eb426 --- /dev/null +++ b/ethtool-bitops.h @@ -0,0 +1,25 @@ +#ifndef ETHTOOL_BITOPS_H__ +#define ETHTOOL_BITOPS_H__ + +#define BITS_PER_BYTE 8 +#define BITS_PER_LONG (BITS_PER_BYTE * sizeof(long)) +#define DIV_ROUND_UP(n, d) (((n) + (d) - 1) / (d)) +#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_LONG) + +static inline void set_bit(int nr, unsigned long *addr) +{ + addr[nr / BITS_PER_LONG] |= 1UL << (nr % BITS_PER_LONG); +} + +static inline void clear_bit(int nr, unsigned long *addr) +{ + addr[nr / BITS_PER_LONG] &= ~(1UL << (nr % BITS_PER_LONG)); +} + +static inline int test_bit(unsigned int nr, const unsigned long *addr) +{ + return !!((1UL << (nr % BITS_PER_LONG)) & + (((unsigned long *)addr)[nr / BITS_PER_LONG])); +} + +#endif |