dueca::StreamReaderLatest< T > Class Template Reference

This is a "light weight object" that enables you to read the latest set of data on a StreamChannelEnd. More...

#include <StreamReaderLatest.hxx>

Inheritance diagram for dueca::StreamReaderLatest< T >:

Collaboration diagram for dueca::StreamReaderLatest< T >:

Public Member Functions
	StreamReaderLatest (StreamChannelReadToken< T > &token)
	Constructor.
	StreamReaderLatest (StreamChannelReadToken< T > &token, const TimeSpec &dum)
	Second Constructor.
	~StreamReaderLatest ()
	Destructor.
bool	ok ()
	Check whether access can be successful.
Public Member Functions inherited from dueca::DataReader< T, MatchIntervalStartOrEarlier >
	DataReader (ChannelReadToken &token, const DataTimeSpec &ts)
	Constructor.
	DataReader (ChannelReadToken &token, const TimeSpec &ts)
	Constructor with TimeSpec.
	DataReader (ChannelReadToken &token, TimeTickType ts=MAX_TIMETICK)
	Constructor with time tick.
const T &	data ()
	Access to the data.
const DataTimeSpec &	timeSpec ()
	Return the time specification of the data.
const GlobalId &	origin ()
	Return the origin.
	~DataReader ()
	Destructor.

Additional Inherited Members
Protected Member Functions inherited from dueca::DataReaderBase
	DataReaderBase (ChannelReadToken &token, const DataTimeSpec &t_request)
	Constructor.
Protected Attributes inherited from dueca::DataReaderBase
ChannelReadToken &	token
	Reference to the channel access token.
DataTimeSpec	t_request
	Time span or point requested.
DataTimeSpec	ts_data
	Time specification as realised.
GlobalId	data_origin
	Data origin.
bool	firstaccess
	First access flag.

Detailed Description

template<class T>
class dueca::StreamReaderLatest< T >

This is a "light weight object" that enables you to read the latest set of data on a StreamChannelEnd.

The idea is that this object is created "on the stack" (so new StreamReaderLatest<YourType>(token); will not work!). The access token, which you must have made and validated earlier, is used to gain access to the data. If successfull, you can call the data() method to get access to the data, and the timeSpec() method to find out about the time stamp of this data.

Note that it is seldom necessary to use StreamReaderLatest, normally you should use StreamReader.

Constructor & Destructor Documentation

StreamReaderLatest() [1/2]

template<class T >

dueca::StreamReaderLatest< T >::StreamReaderLatest ( StreamChannelReadToken< T > & token )

inline

Constructor.

Gains access to the channel for which the token was made.

Parameters

token

Read access token.

StreamReaderLatest() [2/2]

template<class T >

dueca::StreamReaderLatest< T >::StreamReaderLatest ( StreamChannelReadToken< T > & token, const TimeSpec & dum )

inline

Second Constructor.

Gains access to the channel for which the token was made. The TimeSpec argument is ignored. This constructor is only added for compatibility.

Parameters

token	Read access token.
dum	TimeSpec, ignored.

~StreamReaderLatest()

template<class T >

dueca::StreamReaderLatest< T >::~StreamReaderLatest ( )

inline

Destructor.

Releases the access again with a token.

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

• /home/abuild/rpmbuild/BUILD/dueca-4.1.1/dueca/StreamReaderLatest.hxx