gr_buffer Class Reference
[Implementation Details]

Single writer, multiple reader fifo. More...

#include <gr_buffer.h>

Collaboration diagram for gr_buffer:

[legend]

List of all members.

Public Member Functions
virtual	~gr_buffer ()
int	space_available () const
	return number of items worth of space available for writing
void *	write_pointer ()
	return pointer to write buffer.
void	update_write_pointer (int nitems)
	tell buffer that we wrote nitems into it
void	set_done (bool done)
bool	done () const
Protected Attributes
char *	d_base
unsigned int	d_bufsize
Friends
class	gr_buffer_reader
gr_buffer_sptr	gr_make_buffer (int nitems, size_t sizeof_item)
	Allocate a buffer that holds at least nitems of size sizeof_item.
gr_buffer_reader_sptr	gr_buffer_add_reader (gr_buffer_sptr buf, int nzero_preload)
	create a new gr_buffer_reader and attach it to buffer buf

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Detailed Description

Single writer, multiple reader fifo.

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Constructor & Destructor Documentation

virtual gr_buffer::~gr_buffer

(

)

[virtual]

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Member Function Documentation

bool gr_buffer::done

(

)

const [inline]

void gr_buffer::set_done

(

bool

done

)

[inline]

int gr_buffer::space_available

(

)

const

return number of items worth of space available for writing

void gr_buffer::update_write_pointer

(

int

nitems

)

tell buffer that we wrote nitems into it

void* gr_buffer::write_pointer

(

)

return pointer to write buffer.

The return value points at space that can hold at least space_available() items.

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Friends And Related Function Documentation

gr_buffer_reader_sptr gr_buffer_add_reader	(	gr_buffer_sptr	buf,
		int	nzero_preload
	)			[friend]

create a new gr_buffer_reader and attach it to buffer buf

Parameters:

nzero_preload

-- number of zero items to "preload" into buffer.

friend class gr_buffer_reader [friend]

gr_buffer_sptr gr_make_buffer	(	int	nitems,
		size_t	sizeof_item
	)			[friend]

Allocate a buffer that holds at least nitems of size sizeof_item.

The total size of the buffer will be rounded up to a system dependent boundary. This is typically the system page size, but under MS windows is 64KB.

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Member Data Documentation

char* gr_buffer::d_base [protected]

unsigned int gr_buffer::d_bufsize [protected]

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

• gr_buffer.h