kernel/user space shared circular buffer More...

#include <dx_stream.h>

Public Member Functions
uint64_t	empty ()

uint64_t	empty (volatile uint64_t &position)

template<typename circular_t , typename ext_t >
bool	force_write (volatile uint64_t &position, const ext_t const src, uint64_t bulk, unsigned int channels_circular=1, unsigned int channels_src=1, unsigned int circular_offset=0, unsigned int interleaved=1)
	multi channel interleaved bulk write into circular buffer with format conversion if applicable More...

template<typename circular_t , typename ext_t >
bool	force_write (const ext_t const src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int channels_src=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename circular_t , typename ext_t >
bool	force_write (volatile uint64_t &position, const ext_t *src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)
	single channel More...

template<typename circular_t , typename ext_t >
bool	force_write (const ext_t *src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	force_write (volatile uint64_t &position, const data_t *src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)
	single channel circular_t==ext_t More...

template<typename data_t >
bool	force_write (const data_t *src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	force_write (const data_t const src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int channels_src=1, unsigned int circular_offset=0, unsigned int interleaved=1)
	multi channel circular_t==ext_t More...

template<typename circular_t , typename src_t >
bool	force_write (src_t const const *src, unsigned int clients, unsigned int channels=1, uint64_t bulk=1)
	multi channel multi client bulk mix into circular buffer with format conversion if applicable src[client][channel][sample] More...

template<typename data_t >
bool	force_write (data_t const const *src, uint64_t clients, uint64_t channels, uint64_t bulk)

void	initialize (uint64_t backingstore_size)

void	initialize ()

uint64_t	loop () const

template<typename exception_t , typename callback_t >
void	move (callback_t &callback, uint64_t max) throw (exception_t)

template<typename data_t >
bool	operator<< (const data_t &src)

template<typename data_t >
bool	operator>> (data_t &dst)

template<typename circular_t , typename ext_t >
bool	read (volatile uint64_t &position, ext_t const dst, uint64_t bulk, unsigned int channels_circular=1, unsigned int channels_dst=1, unsigned int circular_offset=0, unsigned int interleaved=1)
	multi channel interleaved bulk read from circular buffer with format conversion if applicable More...

template<typename circular_t , typename ext_t >
bool	read (ext_t const dst, uint64_t bulk, unsigned int channels_circular=1, unsigned int channels_dst=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename circular_t , typename ext_t >
bool	read (volatile uint64_t &position, ext_t *dst, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename circular_t , typename ext_t >
bool	read (ext_t *dst, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	read (volatile uint64_t &position, data_t *dst, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	read (data_t *dst, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	read (data_t const dst, uint64_t bulk, unsigned int channels_circular=1, unsigned int channels_dst=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	read (volatile uint64_t &position, data_t const dst, uint64_t bulk, unsigned int channels_circular=1, unsigned int channels_dst=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename dst_t = char>
dst_t *	simulate_read (volatile uint64_t &position, uint64_t bulk=1)

template<typename dst_t = char>
dst_t *	simulate_read (uint64_t bulk=1)

char *	simulate_write (uint64_t bulk)
	simulate write by advancing write idx and take care of wrap write optimization More...

uint64_t	used ()

uint64_t	used (volatile uint64_t &position)

template<typename circular_t , typename ext_t >
bool	write (volatile uint64_t &position, const ext_t const src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int channels_src=1, unsigned int circular_offset=0, unsigned int interleaved=1)
	bulk write into circular buffer with format conversion if applicable More...

template<typename circular_t , typename ext_t >
bool	write (const ext_t const src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int channels_src=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename circular_t , typename ext_t >
bool	write (volatile uint64_t &position, const ext_t *src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename circular_t , typename ext_t >
bool	write (const ext_t *src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	write (volatile uint64_t &position, const data_t *src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	write (const data_t *src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int circular_offset=0, unsigned int interleaved=1)

template<typename data_t >
bool	write (const data_t const src, uint64_t bulk=1, unsigned int channels_circular=1, unsigned int channels_src=1, unsigned int circular_offset=0, unsigned int interleaved=1)

Public Attributes
char	data [1]

volatile uint64_t	dropout
	drop out counter More...

volatile uint64_t	rx
	single consumers current read index More...

uint64_t	size
	size of buffer in bytes More...

volatile int64_t	timestamp
	current rx/tx timestamp More...

volatile uint64_t	tx
	producers current write index More...

struct {
volatile uint64_t count
	buffer wrap count More...

volatile int64_t timestamp
	timestamp of last buffer wrap More...

}	zero

Detailed Description

kernel/user space shared circular buffer

this buffer is non-blocking for single-consumer/single-producer configurations; multiple producer write interleaved while obtaining shadow.tx; if shadow.tx==tx the producer is allowed to write into the buffer after advancing shadow.tx to the final tx position; once tx reaches shadow.tx the write is terminated and the producer can start a write cycle. multiple consumer each hold there own rx and read between rx and cycle.tx.

Member Function Documentation

uint64_t dx::circular::empty ( )

inline

Here is the call graph for this function:

Here is the caller graph for this function:

uint64_t dx::circular::empty ( volatile uint64_t & position )

inline

template<typename circular_t , typename ext_t >

bool dx::circular::force_write	(	volatile uint64_t &	position,
		const ext_t const	src,
		uint64_t	bulk,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_src = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

multi channel interleaved bulk write into circular buffer with format conversion if applicable

return true if data fit into circular space

Here is the caller graph for this function:

template<typename circular_t , typename ext_t >

bool dx::circular::force_write	(	const ext_t const	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_src = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename circular_t , typename ext_t >

bool dx::circular::force_write	(	volatile uint64_t &	position,
		const ext_t *	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

single channel

template<typename circular_t , typename ext_t >

bool dx::circular::force_write	(	const ext_t *	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::force_write	(	volatile uint64_t &	position,
		const data_t *	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

single channel circular_t==ext_t

template<typename data_t >

bool dx::circular::force_write	(	const data_t *	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::force_write	(	const data_t const	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_src = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

multi channel circular_t==ext_t

template<typename circular_t , typename src_t >

bool dx::circular::force_write	(	src_t const const *	src,
		unsigned int	clients,
		unsigned int	channels = `1`,
		uint64_t	bulk = `1`
	)

inline

multi channel multi client bulk mix into circular buffer with format conversion if applicable src[client][channel][sample]

return true if data fit into empty space

template<typename data_t >

bool dx::circular::force_write	(	data_t const const *	src,
		uint64_t	clients,
		uint64_t	channels,
		uint64_t	bulk
	)

inline

void dx::circular::initialize ( uint64_t backingstore_size )

inline

Here is the call graph for this function:

Here is the caller graph for this function:

void dx::circular::initialize ( )

inline

Here is the caller graph for this function:

uint64_t dx::circular::loop ( ) const

inline

Here is the caller graph for this function:

template<typename exception_t , typename callback_t >

void dx::circular::move	(	callback_t &	callback,
		uint64_t	max
	)
throw	(	exception_t
	)

inline

Here is the call graph for this function:

template<typename data_t >

bool dx::circular::operator<< ( const data_t & src )

inline

template<typename data_t >

bool dx::circular::operator>> ( data_t & dst )

inline

template<typename circular_t , typename ext_t >

bool dx::circular::read	(	volatile uint64_t &	position,
		ext_t const	dst,
		uint64_t	bulk,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_dst = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

multi channel interleaved bulk read from circular buffer with format conversion if applicable

return true if enough data is available in circular space

Here is the call graph for this function:

Here is the caller graph for this function:

template<typename circular_t , typename ext_t >

bool dx::circular::read	(	ext_t const	dst,
		uint64_t	bulk,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_dst = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename circular_t , typename ext_t >

bool dx::circular::read	(	volatile uint64_t &	position,
		ext_t *	dst,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename circular_t , typename ext_t >

bool dx::circular::read	(	ext_t *	dst,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::read	(	volatile uint64_t &	position,
		data_t *	dst,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::read	(	data_t *	dst,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::read	(	data_t const	dst,
		uint64_t	bulk,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_dst = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::read	(	volatile uint64_t &	position,
		data_t const	dst,
		uint64_t	bulk,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_dst = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename dst_t = char>

dst_t* dx::circular::simulate_read	(	volatile uint64_t &	position,
		uint64_t	bulk = `1`
	)

inline

Here is the call graph for this function:

Here is the caller graph for this function:

template<typename dst_t = char>

dst_t* dx::circular::simulate_read ( uint64_t bulk = 1 )

inline

char* dx::circular::simulate_write ( uint64_t bulk )

inline

simulate write by advancing write idx and take care of wrap write optimization

uint64_t dx::circular::used ( )

inline

Here is the call graph for this function:

Here is the caller graph for this function:

uint64_t dx::circular::used ( volatile uint64_t & position )

inline

template<typename circular_t , typename ext_t >

bool dx::circular::write	(	volatile uint64_t &	position,
		const ext_t const	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_src = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

bulk write into circular buffer with format conversion if applicable

return true if data fit into empty space

Here is the call graph for this function:

Here is the caller graph for this function:

template<typename circular_t , typename ext_t >

bool dx::circular::write	(	const ext_t const	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_src = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

Here is the call graph for this function:

template<typename circular_t , typename ext_t >

bool dx::circular::write	(	volatile uint64_t &	position,
		const ext_t *	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename circular_t , typename ext_t >

bool dx::circular::write	(	const ext_t *	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::write	(	volatile uint64_t &	position,
		const data_t *	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::write	(	const data_t *	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

template<typename data_t >

bool dx::circular::write	(	const data_t const	src,
		uint64_t	bulk = `1`,
		unsigned int	channels_circular = `1`,
		unsigned int	channels_src = `1`,
		unsigned int	circular_offset = `0`,
		unsigned int	interleaved = `1`
	)

inline

Member Data Documentation

volatile uint64_t dx::circular::count

buffer wrap count

char dx::circular::data[1]

volatile uint64_t dx::circular::dropout

drop out counter

volatile uint64_t dx::circular::rx

single consumers current read index

uint64_t dx::circular::size

size of buffer in bytes

volatile int64_t dx::circular::timestamp

current rx/tx timestamp

timestamp of last buffer wrap

volatile uint64_t dx::circular::tx

producers current write index

struct { ... } dx::circular::zero

The documentation for this struct was generated from the following file:

dx_stream.h

Public Member Functions

Public Attributes

Detailed Description

Member Function Documentation

Member Data Documentation