osal_bitmap

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.

详细描述

函数说明

osal_bitmap_change_bit()

void osal_bitmap_change_bit	(	int	nr,
		unsigned long *	addr
	)

Used to change bit for bitmap.

Description:

Used to change bit for bitmap.

参数

nr	[in] bit number in bit array.
addr	[in] address of the bit array to be change.

Support System:

linux.

osal_bitmap_clear_bit()

void osal_bitmap_clear_bit	(	int	nr,
		unsigned long *	addr
	)

Used to clear bit for bitmap.

Description:

Used to clear bit for bitmap.

参数

nr	[in] bit number in bit array.
addr	[in] address of the bit array to be clear.

Support System:

linux.

osal_bitmap_find_first_bit()

int osal_bitmap_find_first_bit	(	const unsigned long *	name,
		unsigned	size
	)

find the first set bit in a memory region.

Description:

find the first set bit in a memory region.

参数

name	[in] The name to base the search on.
size	[in] The bitmap size in bits.

返回

The position of first set bit in *addr

Support System:

linux.

osal_bitmap_find_first_zero_bit()

int osal_bitmap_find_first_zero_bit	(	const unsigned long *	name,
		unsigned	size
	)

find the first cleared bit in a memory region.

Description:

find the first cleared bit in a memory region.

参数

name	[in] The name to base the search on.
size	[in] The bitmap size in bits.

返回

The position of first zero bit in *addr

Support System:

linux.

osal_bitmap_find_next_bit()

int osal_bitmap_find_next_bit	(	const unsigned long *	name,
		unsigned	size,
		int	offset
	)

find the next set bit in a memory region.

Description:

find the next set bit in a memory region.

参数

name	[in] The name to base the search on.
size	[in] The bitmap size in bits.
offset	[in] The bitnumber to start searching at.

返回

The position of next set bit in *addr >= bit

Support System:

linux.

osal_bitmap_find_next_zero_bit()

int osal_bitmap_find_next_zero_bit	(	const unsigned long *	name,
		int	size,
		int	offset
	)

find the next cleared bit in a memory region.

Description:

find the next cleared bit in a memory region.

参数

name	[in] The name to base the search on.
size	[in] The bitmap size in bits.
offset	[in] The bitnumber to start searching at.

返回

The position of next zero bit in *addr >= bit

Support System:

linux.

osal_bitmap_set_bit()

void osal_bitmap_set_bit	(	int	nr,
		unsigned long *	addr
	)

Used to set bit for bitmap.

Description:

Used to set bit for bitmap.

参数

nr	[in] bit number in bit array.
addr	[in] address of the bit array to be set.

Support System:

linux.

osal_bitmap_test_and_change_bit()

int osal_bitmap_test_and_change_bit	(	int	nr,
		unsigned long *	addr
	)

Change bit and return old value.

Description:

Change bit and return old value.

参数

nr	[in] bit number in bit array.
addr	[in] address of the bit array to be change.

返回

return old value.

Support System:

linux.

osal_bitmap_test_and_clear_bit()

int osal_bitmap_test_and_clear_bit	(	int	nr,
		unsigned long *	addr
	)

Clear bit and return old value.

Description:

Clear bit and return old value.

参数

nr	[in] bit number in bit array.
addr	[in] address of the bit array to be change.

返回

return old value.

Support System:

linux.

osal_bitmap_test_and_set_bit()

int osal_bitmap_test_and_set_bit	(	int	nr,
		unsigned long *	addr
	)

Set bit and return old value.

Description:

Set bit and return old value.

参数

nr	[in] bit number in bit array.
addr	[in] address of the bit array to be change.

返回

return old value.

Support System:

linux.

osal_bitmap_test_bit()

int osal_bitmap_test_bit	(	int	nr,
		unsigned long *	addr
	)

Tests whether a given bit in an array of bits is set.

Description:

Tests whether a given bit in an array of bits is set.

参数

nr	[in] bit number in bit array.
addr	[in] address of the bit array to be change.

返回

true/false

Support System:

linux.