gr-baz Package
gr_buffer_reader Class Reference

How we keep track of the readers of a gr_buffer. More...

#include <gr_buffer.h>

Public Member Functions

 ~gr_buffer_reader ()
int items_available () const
 Return number of items available for reading.
gr_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 voidread_pointer ()
 return pointer to read buffer.
void update_read_pointer (int nitems)
void set_done (bool done)
bool done () const
gruel::mutexmutex ()
uint64_t nitems_read ()
size_t get_sizeof_item ()
gr_block_sptr link ()
 Return the block that reads via this reader.
void get_tags_in_range (std::vector< gr_tag_t > &v, uint64_t abs_start, uint64_t abs_end)
 Given a [start,end), returns a vector all tags in the range.

Friends

class gr_buffer
GR_CORE_API gr_buffer_reader_sptr gr_buffer_add_reader (gr_buffer_sptr buf, int nzero_preload, gr_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::~gr_buffer_reader ( )

Member Function Documentation

gr_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< gr_tag_t > &  v,
uint64_t  abs_start,
uint64_t  abs_end 
)

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
va vector reference to return tags into
abs_starta uint64 count of the start of the range of interest
abs_enda uint64 count of the end of the range of interest
int gr_buffer_reader::items_available ( ) const

Return number of items available for reading.

gr_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.

gruel::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)

Friends And Related Function Documentation

friend class gr_buffer
friend
GR_CORE_API gr_buffer_reader_sptr gr_buffer_add_reader ( gr_buffer_sptr  buf,
int  nzero_preload,
gr_block_sptr  link 
)
friend

Create a new gr_buffer_reader and attach it to buffer buf.

Parameters
bufis the buffer the gr_buffer_reader reads from.
nzero_preload– number of zero items to "preload" into buffer.
linkis the block that reads from the buffer using this gr_buffer_reader.

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