Bitmap manipulation. More...

Functions
struct bitmap *	numa_parse_nodestring (char *string)
	parses a character string list of nodes into a bit mask. More...

struct bitmap *	numa_parse_cpustring (char *string)
	parses a character string list of cpus into a bit mask. More...

struct bitmap *	numa_allocate_cpumask (void)
	allocating a bitmap to hold all the configured CPUs More...

void	numa_free_cpumask (struct bitmap *cpumask)
	frees a previously allocated CPU bitmask More...

struct bitmap *	numa_allocate_nodemask (void)
	allocates a bit mask to represent the nodes in the system More...

void	numa_free_nodemask (struct bitmap *nodemask)
	frees a previously allocated node bitmask More...

struct bitmap *	numa_bitmask_alloc (unsigned int n)
	allocates a bitmask structure and its associated bit mask More...

struct bitmap *	numa_bitmask_clearall (struct bitmap *bmp)
	sets all bits in the bit mask to 0. More...

struct bitmap *	numa_bitmask_clearbit (struct bitmap *bmp, unsigned int n)
	clears the n-th bit of a bitmask More...

bool	numa_bitmask_equal (const struct bitmap bmp1, const struct bitmap bmp2)
	checks if two bitmasks are equal More...

void	numa_bitmask_free (struct bitmap *bmp)
	frees the memory of a bitmask More...

bool	numa_bitmask_isbitset (const struct bitmap *bmp, unsigned int n)
	checks if the n-th bit is set in the bitmask More...

size_t	numa_bitmask_nbytes (struct bitmap *bmp)
	returns the size (in bytes) of the bit mask More...

struct bitmap *	numa_bitmask_setall (struct bitmap *bmp)
	sets all bits of a bitmask to 1 More...

struct bitmap *	numa_bitmask_setbit (struct bitmap *bmp, unsigned int n)
	sets the n-th bit of a bitmask to 1 More...

void	copy_bitmask_to_nodemask (struct bitmap bmp, nodemask_t nodemask)
	copies the bitmask to a nodemask More...

void	copy_nodemask_to_bitmask (nodemask_t nodemask, struct bitmap bmp)
	copies the contents of a nodemask into the bitmask More...

void	copy_bitmask_to_bitmask (struct bitmap bmpfrom, struct bitmap bmpto)
	copies one bitmask into another More...

uint32_t	numa_bitmask_weight (const struct bitmap *bmp)
	returns a count of the bits that are set in the body of the bitmask More...

Detailed Description

Bitmap manipulation.

Function Documentation

void copy_bitmask_to_bitmask	(	struct bitmap *	bmpfrom,
		struct bitmap *	bmpto
	)

copies one bitmask into another

Parameters

bmpfrom	the source bitmask
bmpto	the destination bitmask

If the two areas differ in size, the copy is truncated to the size of the receiving field or zero-filled.

void copy_bitmask_to_nodemask	(	struct bitmap *	bmp,
		nodemask_t *	nodemask
	)

copies the bitmask to a nodemask

Parameters

bmp	the bitmask to copy
nodemask	the destination nodemask

If the two areas differ in size, the copy is truncated to the size of the receiving field or zero-filled.

void copy_nodemask_to_bitmask	(	nodemask_t *	nodemask,
		struct bitmap *	bmp
	)

copies the contents of a nodemask into the bitmask

Parameters

nodemask	node mask to copy from
bmp	bitmap to copy into

If the two areas differ in size, the copy is truncated to the size of the receiving field or zero-filled.

struct bitmap* numa_allocate_cpumask ( void )

allocating a bitmap to hold all the configured CPUs

allocates a bit mask to represent the cores in the system

Returns

struct bitmap* numa_allocate_nodemask ( void )

allocates a bit mask to represent the nodes in the system

Returns: pointer to a new bitmask NULL on failure

struct bitmap* numa_bitmask_alloc ( unsigned int n )

allocates a bitmask structure and its associated bit mask

Parameters

n	the number of bits

Returns: pointer to the bitmask NULL on error

struct bitmap* numa_bitmask_clearall ( struct bitmap * bmp )

sets all bits in the bit mask to 0.

Parameters

bmp	pointer to the bitmap

Returns: pointer to the cleared bit map

struct bitmap* numa_bitmask_clearbit	(	struct bitmap *	bmp,
		unsigned int	n
	)

clears the n-th bit of a bitmask

Parameters

bmp	the bitmask
n	the bit to clear

Returns: pointer to the bitmask

bool numa_bitmask_equal	(	const struct bitmap *	bmp1,
		const struct bitmap *	bmp2
	)

checks if two bitmasks are equal

Parameters

bmp1	bitmask 1
bmp2	bitmask 2

Returns: TRUE if the bitmasks are equal FALSE if the are distinct

void numa_bitmask_free ( struct bitmap * bmp )

frees the memory of a bitmask

Parameters

bmp	the bitmask to be freed

bool numa_bitmask_isbitset	(	const struct bitmap *	bmp,
		unsigned int	n
	)

checks if the n-th bit is set in the bitmask

Parameters

bmp	the bitmap
n	which bit to check

Returns: TRUE if the n-th bit is set FALSE otherwise

size_t numa_bitmask_nbytes ( struct bitmap * bmp )

returns the size (in bytes) of the bit mask

Parameters

bmp	the bitmask

Returns: the size of the memory in bytes rounded up to a multiple of wordsize

struct bitmap* numa_bitmask_setall ( struct bitmap * bmp )

sets all bits of a bitmask to 1

Parameters

bmp	the bitmask

Returns: the bitmask

struct bitmap* numa_bitmask_setbit	(	struct bitmap *	bmp,
		unsigned int	n
	)

sets the n-th bit of a bitmask to 1

Parameters

bmp	the bitmask
n	which bit to activate

Returns: the bitmask

uint32_t numa_bitmask_weight ( const struct bitmap * bmp )

returns a count of the bits that are set in the body of the bitmask

Parameters

bmp	the bitmask to count the set bits

Returns: number of set bits in this bitmask

void numa_free_cpumask ( struct bitmap * cpumask )

frees a previously allocated CPU bitmask

Parameters

cpumask pointer to a previously allocated CPU bitmask

void numa_free_nodemask ( struct bitmap * nodemask )

frees a previously allocated node bitmask

Parameters

nodemask pointer to a previously allocated node bitmask

struct bitmap* numa_parse_cpustring ( char * string )

parses a character string list of cpus into a bit mask.

Parameters

string character string to parse

Returns: NUMA bitmask on SUCCESS NULL if the string is invalid

The string is a comma-separated list of cpu numbers or cpu ranges Examples: 1-5,7,10 !4-5 +0-3

struct bitmap* numa_parse_nodestring ( char * string )

parses a character string list of nodes into a bit mask.

Parameters

string character string to parse

Returns: NUMA bitmask on SUCCESS NULL if the string is invalid

The string is a comma-separated list of node numbers or node ranges Examples: 1-5,7,10 !4-5 +0-3

If the string length is zero, then the numa_no_nodes_ptr is returned

Functions

Detailed Description

Function Documentation