Stxxl: buf_istream< BlkTp_, BIDIteratorTp_ > Class Template Reference

Buffered input stream. More...

#include <buf_istream.h>

Collaboration diagram for buf_istream< BlkTp_, BIDIteratorTp_ >:

Collaboration graph

List of all members.

Public Types
typedef block_type::reference	reference
typedef buf_istream < block_type, bid_iterator_type >	_Self
Public Member Functions
	buf_istream (bid_iterator_type _begin, bid_iterator_type _end, int_type nbuffers)
	Constructs input stream object.
_Self &	operator>> (reference record)
	Input stream operator, reads in `record`.
reference	current ()
	Returns reference to the current record in the stream.
reference	operator* ()
	Returns reference to the current record in the stream.
_Self &	operator++ ()
	Moves to the next record in the stream.
virtual	~buf_istream ()
	Frees used internal objects.
Protected Types
typedef block_prefetcher < block_type, bid_iterator_type >	prefetcher_type
Protected Attributes
prefetcher_type *	prefetcher
bid_iterator_type	begin_bid
bid_iterator_type	end_bid
int_type	current_elem
block_type *	current_blk
int_type *	prefetch_seq
bool	not_finished

Detailed Description

template<typename BlkTp_, typename BIDIteratorTp_>
class buf_istream< BlkTp_, BIDIteratorTp_ >

Buffered input stream.

Reads data records from the stream of blocks.

Remarks:: Reading performed in the background, i.e. with overlapping of I/O and computation

Constructor & Destructor Documentation

template<typename BlkTp_ , typename BIDIteratorTp_ >

buf_istream< BlkTp_, BIDIteratorTp_ >::buf_istream	(	bid_iterator_type	_begin,
		bid_iterator_type	_end,
		int_type	nbuffers
	)			`[inline]`

Constructs input stream object.

Parameters:

	_begin	`bid_iterator` pointing to the first block of the stream
	_end	`bid_iterator` pointing to the ( last + 1 ) block of the stream
	nbuffers	number of buffers for internal use

References block_prefetcher< block_type, bid_iterator_type >::pull_block().

template<typename BlkTp_ , typename BIDIteratorTp_ >

virtual buf_istream< BlkTp_, BIDIteratorTp_ >::~buf_istream ( ) [inline, virtual]

Frees used internal objects.

Member Function Documentation

template<typename BlkTp_ , typename BIDIteratorTp_ >

reference buf_istream< BlkTp_, BIDIteratorTp_ >::current ( ) [inline]

Returns reference to the current record in the stream.

Returns:: reference to the current record in the stream

template<typename BlkTp_ , typename BIDIteratorTp_ >

reference buf_istream< BlkTp_, BIDIteratorTp_ >::operator* ( ) [inline]

Returns reference to the current record in the stream.

Returns:: reference to the current record in the stream

template<typename BlkTp_ , typename BIDIteratorTp_ >

_Self& buf_istream< BlkTp_, BIDIteratorTp_ >::operator++ ( ) [inline]

Moves to the next record in the stream.

Returns:: reference to itself after the advance

References block_prefetcher< block_type, bid_iterator_type >::block_consumed().

template<typename BlkTp_ , typename BIDIteratorTp_ >

_Self& buf_istream< BlkTp_, BIDIteratorTp_ >::operator>> ( reference record ) [inline]

Input stream operator, reads in record.

Parameters:

record

reference to the block record type, contains value of the next record in the stream after the call of the operator

Returns:: reference to itself (stream object)

References block_prefetcher< block_type, bid_iterator_type >::block_consumed().

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

buf_istream.h