A connection element that stores a single data sample. More...

#include <rtt/internal/ChannelDataElement.hpp>

Inheritance diagram for RTT::internal::ChannelDataElement< T >:

Public Types
typedef base::ChannelElement< T >::param_t	param_t

typedef base::ChannelElement< T >::reference_t	reference_t

typedef T	value_t

typedef boost::intrusive_ptr< ChannelElement< T > >	shared_ptr

Public Member Functions
	ChannelDataElement (typename base::DataObjectInterface< T >::shared_ptr sample)

virtual bool	write (param_t sample)
	Update the data sample stored in this element. More...

virtual FlowStatus	read (reference_t sample, bool copy_old_data)
	Reads the last sample given to write() More...

virtual void	clear ()
	Resets the stored sample. More...

virtual bool	data_sample (param_t sample)
	Provides a data sample to initialize this connection. More...

virtual T	data_sample ()

virtual std::string	getElementName () const
	Returns the class name of this element. More...

shared_ptr	getOutput ()

shared_ptr	getInput ()

void	removeInput ()
	Removes the input channel (if any). More...

ChannelElementBase::shared_ptr	getInputEndPoint ()
	Returns the first input channel element of this connection. More...

ChannelElementBase::shared_ptr	getOutputEndPoint ()
	Returns the last output channel element of this connection. More...

void	setOutput (shared_ptr output)
	Sets the output of this channel element to output and sets the input of output to this. More...

virtual bool	signal ()
	Signals that there is new data available on this channel By default, the channel element forwards the call to its output. More...

virtual bool	inputReady ()
	This is called by an input port when it is ready to receive data. More...

virtual void	disconnect (bool forward)
	Performs a disconnection of this channel's endpoints. More...

virtual PortInterface *	getPort () const
	Gets the port this channel element is connected to. More...

virtual internal::ConnID *	getConnID () const
	Gets the Connection ID of this channel. More...

virtual bool	isRemoteElement () const
	This function may be used to identify, if the current element uses a network transport, to send the data to the next Element in the logical chain. More...

virtual std::string	getRemoteURI () const
	This function returns the URI of the next channel element in the logical chain. More...

virtual std::string	getLocalURI () const
	This function return the URI of this element. More...

Protected Member Functions
void	ref ()
	Increases the reference count. More...

void	deref ()
	Decreases the reference count, and deletes the object if it is zero. More...

Detailed Description

template<typename T>
class RTT::internal::ChannelDataElement< T >

A connection element that stores a single data sample.

Definition at line 50 of file ChannelDataElement.hpp.

Member Typedef Documentation

template<typename T>

typedef base::ChannelElement<T>::param_t RTT::internal::ChannelDataElement< T >::param_t

Definition at line 56 of file ChannelDataElement.hpp.

template<typename T>

typedef base::ChannelElement<T>::reference_t RTT::internal::ChannelDataElement< T >::reference_t

Definition at line 57 of file ChannelDataElement.hpp.

template<typename T>

typedef boost::intrusive_ptr< ChannelElement<T> > RTT::base::ChannelElement< T >::shared_ptr

inherited

Definition at line 58 of file ChannelElement.hpp.

template<typename T>

typedef T RTT::base::ChannelElement< T >::value_t

inherited

Definition at line 57 of file ChannelElement.hpp.

Constructor & Destructor Documentation

template<typename T>

RTT::internal::ChannelDataElement< T >::ChannelDataElement ( typename base::DataObjectInterface< T >::shared_ptr sample )

inline

Definition at line 59 of file ChannelDataElement.hpp.

Member Function Documentation

template<typename T>

virtual void RTT::internal::ChannelDataElement< T >::clear ( )

inlinevirtual

Resets the stored sample.

After clear() has been called, read() returns false

Reimplemented from RTT::base::ChannelElementBase.

Definition at line 97 of file ChannelDataElement.hpp.

References RTT::base::ChannelElementBase::clear().

template<typename T>

virtual bool RTT::internal::ChannelDataElement< T >::data_sample ( param_t sample )

inlinevirtual

Provides a data sample to initialize this connection.

This is used before the first write() in order to inform this connection of the size of the data. As such enough storage space can be allocated before the actual writing begins.

Returns: false if an error occured that requires the channel to be invalidated.

Reimplemented from RTT::base::ChannelElement< T >.

Definition at line 104 of file ChannelDataElement.hpp.

References RTT::base::ChannelElement< T >::data_sample(), and RTT::base::DataObjectInterface< T >::data_sample().

template<typename T>

virtual T RTT::internal::ChannelDataElement< T >::data_sample ( )

inlinevirtual

Reimplemented from RTT::base::ChannelElement< T >.

Definition at line 110 of file ChannelDataElement.hpp.

References RTT::base::DataObjectInterface< T >::Get().

void ChannelElementBase::deref ( )

protectedinherited

Decreases the reference count, and deletes the object if it is zero.

Definition at line 165 of file ChannelInterface.cpp.

References oro_atomic_dec_and_test().

Referenced by RTT::corba::RemoteChannelElement< T >::_remove_ref(), and RTT::base::intrusive_ptr_release().

void ChannelElementBase::disconnect ( bool forward )

virtualinherited

Performs a disconnection of this channel's endpoints.

If forward is true, then the disconnection is initiated by the input endpoint. Otherwise, it has been initiated by the output endpoint.

Reimplemented in RTT::corba::RemoteChannelElement< T >, RTT::internal::ConnOutputEndpoint< T >, and RTT::internal::ConnInputEndpoint< T >.

Definition at line 76 of file ChannelInterface.cpp.

References RTT::base::ChannelElementBase::getInput(), and RTT::base::ChannelElementBase::getOutput().

Referenced by RTT::internal::ConnInputEndpoint< T >::disconnect(), RTT::internal::ConnOutputEndpoint< T >::disconnect(), RTT::corba::RemoteChannelElement< T >::disconnect(), and RTT::corba::RemoteChannelElement< T >::remoteDisconnect().

internal::ConnID * ChannelElementBase::getConnID ( ) const

virtualinherited

Gets the Connection ID of this channel.

This is only stored in connection endpoints.

Returns: null if no ConnID is associated with this element.

Reimplemented in RTT::internal::ConnOutputEndpoint< T >, and RTT::internal::ConnInputEndpoint< T >.

Definition at line 136 of file ChannelInterface.cpp.

template<typename T>

virtual std::string RTT::internal::ChannelDataElement< T >::getElementName ( ) const

inlinevirtual

Returns the class name of this element.

This is primary useful for special case handling in the connection tracking.

Returns: The name of the class of the ChannelElement

Reimplemented from RTT::base::ChannelElementBase.

Definition at line 115 of file ChannelDataElement.hpp.

template<typename T>

shared_ptr RTT::base::ChannelElement< T >::getInput ( )

inlineinherited

Definition at line 68 of file ChannelElement.hpp.

References RTT::base::ChannelElementBase::getInput().

Referenced by RTT::base::ChannelElement< T >::data_sample(), RTT::corba::RemoteChannelElement< T >::inputReady(), RTT::base::ChannelElement< T >::read(), and RTT::mqueue::MQChannelElement< T >::signal().

ChannelElementBase::shared_ptr ChannelElementBase::getInputEndPoint ( )

inherited

Returns the first input channel element of this connection.

Will return the channel element the furthest away from the input port, or this if none.

Returns: getInput() ? getInput()->getInputEndPoint() : this

Definition at line 97 of file ChannelInterface.cpp.

References RTT::base::ChannelElementBase::getInput().

std::string ChannelElementBase::getLocalURI ( ) const

virtualinherited

This function return the URI of this element.

The URI must be unique.

Returns: URI of this element.

Reimplemented in RTT::corba::RemoteChannelElement< T >, and RTT::mqueue::MQChannelElement< T >.

Definition at line 152 of file ChannelInterface.cpp.

Referenced by RTT::mqueue::MQChannelElement< T >::getLocalURI(), and RTT::corba::RemoteChannelElement< T >::getLocalURI().

template<typename T>

shared_ptr RTT::base::ChannelElement< T >::getOutput ( )

inlineinherited

Definition at line 62 of file ChannelElement.hpp.

References RTT::base::ChannelElementBase::getOutput().

Referenced by RTT::base::ChannelElement< T >::data_sample(), RTT::mqueue::MQChannelElement< T >::data_sample(), RTT::corba::RemoteChannelElement< T >::data_sample(), RTT::mqueue::MQChannelElement< T >::inputReady(), RTT::mqueue::MQChannelElement< T >::signal(), and RTT::base::ChannelElement< T >::write().

ChannelElementBase::shared_ptr ChannelElementBase::getOutputEndPoint ( )

inherited

Returns the last output channel element of this connection.

Will return the channel element the furthest away from the output port, or this if none.

Returns: getOutput() ? getOutput()->getOutputEndPoint() : this

Definition at line 102 of file ChannelInterface.cpp.

References RTT::base::ChannelElementBase::getOutput().

PortInterface * ChannelElementBase::getPort ( ) const

virtualinherited

Gets the port this channel element is connected to.

Returns: null if no port is connected to this element, the port (or a proxy representing the port) otherwise.

Reimplemented in RTT::internal::ConnOutputEndpoint< T >, and RTT::internal::ConnInputEndpoint< T >.

Definition at line 132 of file ChannelInterface.cpp.

std::string ChannelElementBase::getRemoteURI ( ) const

virtualinherited

This function returns the URI of the next channel element in the logical chain.

The URI must be unique. E.g: In the local case output->getLocalURI() In the remote case the URI of the remote channel element.

Returns: URI of the next element.

Reimplemented in RTT::corba::RemoteChannelElement< T >, and RTT::mqueue::MQChannelElement< T >.

Definition at line 144 of file ChannelInterface.cpp.

Referenced by RTT::mqueue::MQChannelElement< T >::getRemoteURI(), and RTT::corba::RemoteChannelElement< T >::getRemoteURI().

bool ChannelElementBase::inputReady ( )

virtualinherited

This is called by an input port when it is ready to receive data.

Each channel element has the responsibility to pass this notification on to the next, in the direction of the output.

Returns: false if a fatal connection failure was encountered and the channel needs to be destroyed.

Reimplemented in RTT::corba::RemoteChannelElement< T >, RTT::mqueue::MQChannelElement< T >, RTT::internal::ConnOutputEndpoint< T >, and RTT::internal::ConnInputEndpoint< T >.

Definition at line 108 of file ChannelInterface.cpp.

References RTT::base::ChannelElementBase::getInput().

Referenced by RTT::internal::ConnOutputEndpoint< T >::inputReady(), and RTT::corba::RemoteChannelElement< T >::inputReady().

bool ChannelElementBase::isRemoteElement ( ) const

virtualinherited

This function may be used to identify, if the current element uses a network transport, to send the data to the next Element in the logical chain.

Returns: true if a network transport is used.

Reimplemented in RTT::corba::RemoteChannelElement< T >, and RTT::mqueue::MQChannelElement< T >.

Definition at line 140 of file ChannelInterface.cpp.

template<typename T>

virtual FlowStatus RTT::internal::ChannelDataElement< T >::read	(	reference_t	sample,
		bool	copy_old_data
	)

inlinevirtual

Reads the last sample given to write()

Returns: false if no sample has ever been written, true otherwise

Reimplemented from RTT::base::ChannelElement< T >.

Definition at line 76 of file ChannelDataElement.hpp.

References RTT::base::DataObjectInterface< T >::Get(), RTT::NewData, RTT::NoData, and RTT::OldData.

void ChannelElementBase::ref ( )

protectedinherited

Increases the reference count.

Definition at line 160 of file ChannelInterface.cpp.

References oro_atomic_inc().

Referenced by RTT::corba::RemoteChannelElement< T >::_add_ref(), RTT::base::intrusive_ptr_add_ref(), and RTT::corba::RemoteChannelElement< T >::RemoteChannelElement().

void RTT::base::ChannelElementBase::removeInput ( )

inherited

Removes the input channel (if any).

This call may delete channels from memory.

void ChannelElementBase::setOutput ( shared_ptr output )

inherited

Sets the output of this channel element to output and sets the input of output to this.

This implies that this channel element becomes the input of output. There is no setInput function since this function does both setting input and output of this and output.

Parameters

output the next element in chain.

Definition at line 69 of file ChannelInterface.cpp.

Referenced by RTT::internal::ConnFactory::buildBufferedChannelInput(), RTT::internal::ConnFactory::buildBufferedChannelOutput(), RTT::internal::ConnFactory::buildChannelInput(), and RTT::corba::CDataFlowInterface_i::deregisterChannel().

bool ChannelElementBase::signal ( )

virtualinherited

Signals that there is new data available on this channel By default, the channel element forwards the call to its output.

Returns: false if an error occured that requires the channel to be invalidated. In no ways it indicates that the sample has been received by the other side of the channel.

Reimplemented in RTT::mqueue::MQChannelElement< T >, RTT::corba::RemoteChannelElement< T >, and RTT::internal::ConnOutputEndpoint< T >.

Definition at line 124 of file ChannelInterface.cpp.

References RTT::base::ChannelElementBase::getOutput().

Referenced by RTT::corba::RemoteChannelElement< T >::remoteSignal(), RTT::corba::RemoteChannelElement< T >::signal(), and RTT::internal::ChannelDataElement< T >::write().

template<typename T>

virtual bool RTT::internal::ChannelDataElement< T >::write ( param_t sample )

inlinevirtual

Update the data sample stored in this element.

It always returns true.

Reimplemented from RTT::base::ChannelElement< T >.

Definition at line 64 of file ChannelDataElement.hpp.

References RTT::base::DataObjectInterface< T >::Set(), and RTT::base::ChannelElementBase::signal().