osal_bitmap.h 文件参考

浏览源代码.

宏定义
#define	OSAL_BITS_PER_BYTE   8
#define	OSAL_BITS_PER_LONG   (OSAL_BITS_PER_BYTE * sizeof(unsigned long))
#define	OSAL_BIT_MASK(nr)   (1UL << ((nr) % OSAL_BITS_PER_LONG))
#define	OSAL_BIT_WORD(nr)   ((nr) / OSAL_BITS_PER_LONG)
#define	OSAL_BITS_TO_LONGS(nr)   (((nr) + (OSAL_BITS_PER_LONG)-1) / (OSAL_BITS_PER_LONG))
#define	OSAL_DECLARE_BITMAP(name, bits)   unsigned long name[OSAL_BITS_TO_LONGS(bits)]
#define	osal_for_each_set_bit(bit, addr, size)
#define	osal_for_each_clear_bit(bit, addr, size)

函数
void	osal_bitmap_set_bit (int nr, unsigned long *addr)
	Used to set bit for bitmap.
void	osal_bitmap_clear_bit (int nr, unsigned long *addr)
	Used to clear bit for bitmap.
void	osal_bitmap_change_bit (int nr, unsigned long *addr)
	Used to change bit for bitmap.
int	osal_bitmap_test_bit (int nr, unsigned long *addr)
	Tests whether a given bit in an array of bits is set.
int	osal_bitmap_test_and_set_bit (int nr, unsigned long *addr)
	Set bit and return old value.
int	osal_bitmap_test_and_clear_bit (int nr, unsigned long *addr)
	Clear bit and return old value.
int	osal_bitmap_test_and_change_bit (int nr, unsigned long *addr)
	Change bit and return old value.
int	osal_bitmap_find_first_zero_bit (const unsigned long *name, unsigned size)
	find the first cleared bit in a memory region.
int	osal_bitmap_find_first_bit (const unsigned long *name, unsigned size)
	find the first set bit in a memory region.
int	osal_bitmap_find_next_zero_bit (const unsigned long *name, int size, int offset)
	find the next cleared bit in a memory region.
int	osal_bitmap_find_next_bit (const unsigned long *name, unsigned size, int offset)
	find the next set bit in a memory region.

宏定义说明

OSAL_BIT_MASK

#define OSAL_BIT_MASK

(

nr

)

(1UL << ((nr) % OSAL_BITS_PER_LONG))

OSAL_BIT_WORD

#define OSAL_BIT_WORD

(

nr

)

((nr) / OSAL_BITS_PER_LONG)

OSAL_BITS_PER_BYTE

#define OSAL_BITS_PER_BYTE   8

OSAL_BITS_PER_LONG

#define OSAL_BITS_PER_LONG   (OSAL_BITS_PER_BYTE * sizeof(unsigned long))

OSAL_BITS_TO_LONGS

#define OSAL_BITS_TO_LONGS

(

nr

)

(((nr) + (OSAL_BITS_PER_LONG)-1) / (OSAL_BITS_PER_LONG))

OSAL_DECLARE_BITMAP

#define OSAL_DECLARE_BITMAP	(		name,
			bits
	)		unsigned long name[OSAL_BITS_TO_LONGS(bits)]

osal_for_each_clear_bit

#define osal_for_each_clear_bit	(		bit,
			addr,
			size
	)

值:

    for ((bit) = osal_bitmap_find_first_zero_bit((addr), (size)); (bit) < (size); \
        (bit) = osal_bitmap_find_next_zero_bit((addr), (size), (bit) + 1))

osal_for_each_set_bit

#define osal_for_each_set_bit	(		bit,
			addr,
			size
	)

值:

    for ((bit) = osal_bitmap_find_first_bit((addr), (size)); (bit) < (size); \
        (bit) = osal_bitmap_find_next_bit((addr), (size), (bit) + 1))