buf_istream< BlkTp_, BIDIteratorTp_ > Class Template Reference

Buffered input stream. More...

#include <buf_istream.h>

Collaboration diagram for buf_istream< BlkTp_, BIDIteratorTp_ >:

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. More...
_Self &	operator>> (reference record)
	Input stream operator, reads in record. More...
reference	current ()
	Returns reference to the current record in the stream. More...
reference	operator* ()
	Returns reference to the current record in the stream. More...
_Self &	operator++ ()
	Moves to the next record in the stream. More...
virtual	~buf_istream ()
	Frees used internal objects. More...

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 ( )

inlinevirtual

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().

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

• buf_istream.h