bitops.h File Reference

bit manipulation functions More...

#include <l4/sys/l4int.h>
#include <l4/sys/compiler.h>
#include <l4/util/bitops_arch.h>
#include <l4/util/atomic.h>

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Macros
#define	l4util_test_and_clear_bit(b, dest)   l4util_btr(b, dest)
	define some more usual names

Functions
void	l4util_set_bit (int b, volatile l4_umword_t *dest)
	Set bit in memory.
void	l4util_clear_bit (int b, volatile l4_umword_t *dest)
	Clear bit in memory.
void	l4util_complement_bit (int b, volatile l4_umword_t *dest)
	Complement bit in memory.
int	l4util_test_bit (int b, const volatile l4_umword_t *dest)
	Test bit (return value of bit)
int	l4util_bts (int b, volatile l4_umword_t *dest)
	Bit test and set.
int	l4util_btr (int b, volatile l4_umword_t *dest)
	Bit test and reset.
int	l4util_btc (int b, volatile l4_umword_t *dest)
	Bit test and complement.
int	l4util_bsr (l4_umword_t word)
	Bit scan reverse.
int	l4util_bsf (l4_umword_t word)
	Bit scan forward.
int	l4util_find_first_set_bit (const void *dest, l4_size_t size)
	Find the first set bit in a memory region.
int	l4util_find_first_zero_bit (const void *dest, l4_size_t size)
	Find the first zero bit in a memory region.
int	l4util_next_power2 (unsigned long val)
	Find the next power of 2 for a given number.

Detailed Description

bit manipulation functions

Date

07/03/2001

Author

Lars Reuther reuth.nosp@m.er@o.nosp@m.s.inf.nosp@m..tu-.nosp@m.dresd.nosp@m.en.d.nosp@m.e

Definition in file bitops.h.