How we keep track of the readers of a gr::buffer. More...

#include <buffer.h>

Public Member Functions
	~buffer_reader ()
int	items_available () const
	Return number of items available for reading.
buffer_sptr	buffer () const
	Return buffer this reader reads from.
int	max_possible_items_available () const
	Return maximum number of items that could ever be available for reading. This is used as a sanity check in the scheduler to avoid looping forever.
const void *	read_pointer ()
	return pointer to read buffer.
void	update_read_pointer (int nitems)
void	set_done (bool done)
bool	done () const
gr::thread::mutex *	mutex ()
uint64_t	nitems_read ()
size_t	get_sizeof_item ()
block_sptr	link ()
	Return the block that reads via this reader.
void	get_tags_in_range (std::vector< tag_t > &v, uint64_t abs_start, uint64_t abs_end, long id)
	Given a [start,end), returns a vector all tags in the range.
Friends
class	buffer
GR_RUNTIME_API buffer_reader_sptr	buffer_add_reader (buffer_sptr buf, int nzero_preload, block_sptr link)
	Create a new gr::buffer_reader and attach it to buffer `buf`.

Detailed Description

How we keep track of the readers of a gr::buffer.

Constructor & Destructor Documentation

gr::buffer_reader::~buffer_reader ( )

buffer_sptr gr::buffer_reader::buffer ( ) const [inline]

Return buffer this reader reads from.

bool gr::buffer_reader::done ( ) const [inline]

size_t gr::buffer_reader::get_sizeof_item ( ) [inline]

void gr::buffer_reader::get_tags_in_range	(	std::vector< tag_t > &	v,
		uint64_t	abs_start,
		uint64_t	abs_end,
		long	id
	)

Given a [start,end), returns a vector all tags in the range.

Get a vector of tags in given range. Range of counts is from start to end-1.

Tags are tuples of: (item count, source id, key, value)

Parameters:

v	a vector reference to return tags into
abs_start	a uint64 count of the start of the range of interest
abs_end	a uint64 count of the end of the range of interest
id	the unique ID of the block to make sure already deleted tags are not returned

int gr::buffer_reader::items_available ( ) const

Return number of items available for reading.

block_sptr gr::buffer_reader::link ( ) [inline]

Return the block that reads via this reader.

int gr::buffer_reader::max_possible_items_available ( ) const [inline]

Return maximum number of items that could ever be available for reading. This is used as a sanity check in the scheduler to avoid looping forever.

gr::thread::mutex* gr::buffer_reader::mutex ( ) [inline]

uint64_t gr::buffer_reader::nitems_read ( ) [inline]

const void* gr::buffer_reader::read_pointer ( )

return pointer to read buffer.

The return value points to items_available() number of items

void gr::buffer_reader::set_done ( bool done ) [inline]

void gr::buffer_reader::update_read_pointer ( int nitems )

friend class buffer [friend]

GR_RUNTIME_API buffer_reader_sptr buffer_add_reader	(	buffer_sptr	buf,
		int	nzero_preload,
		block_sptr	link
	)		`[friend]`

Create a new gr::buffer_reader and attach it to buffer buf.

Parameters:

buf	is the buffer the `gr::buffer_reader` reads from.
nzero_preload	-- number of zero items to "preload" into buffer.
link	is the block that reads from the buffer using this gr::buffer_reader.

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