buffered_writer< block_type > Class Template Reference [Block scheduling sublayer]

Encapsulates asynchronous buffered block writing engine. More...

#include <buf_writer.h>

Collaboration diagram for buffered_writer< block_type >:

List of all members.

Public Member Functions
	buffered_writer (unsigned_type write_buf_size, unsigned_type write_batch_size)
	Constructs an object.
block_type *	get_free_block ()
	Returns free block from the internal buffer pool.
block_type *	write (block_type *filled_block, const bid_type &bid)
	Submits block for writing.
void	flush ()
	Flushes not yet written buffers.
virtual	~buffered_writer ()
	Flushes not yet written buffers and frees used memory.

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Detailed Description

template<typename block_type>
class buffered_writer< block_type >

Encapsulates asynchronous buffered block writing engine.

buffered_writer overlaps I/Os with filling of output buffer.

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Constructor & Destructor Documentation

template<typename block_type >

buffered_writer< block_type >::buffered_writer	(	unsigned_type	write_buf_size,
		unsigned_type	write_batch_size
	)			[inline]

Constructs an object.

Parameters:

	write_buf_size	number of write buffers to use
	write_batch_size	number of blocks to accumulate in order to flush write requests (bulk buffered writing)

template<typename block_type >

virtual buffered_writer< block_type >::~buffered_writer

(

)

[inline, virtual]

Flushes not yet written buffers and frees used memory.

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Member Function Documentation

template<typename block_type >

void buffered_writer< block_type >::flush

(

)

[inline]

Flushes not yet written buffers.

template<typename block_type >

block_type* buffered_writer< block_type >::get_free_block

(

)

[inline]

Returns free block from the internal buffer pool.

Returns:

pointer to the block from the internal buffer pool

References wait_any().

Referenced by buffered_writer< block_type >::write().

template<typename block_type >

block_type* buffered_writer< block_type >::write	(	block_type *	filled_block,
		const bid_type &	bid
	)			[inline]

Submits block for writing.

Parameters:

filled_block

pointer to the block

Remarks:

parameter filled_block must be value returned by get_free_block() or write() methods

Parameters:

bid

block identifier, a place to write data of the filled_block

Returns:

pointer to the new free block from the pool

References buffered_writer< block_type >::get_free_block().

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

• buf_writer.h