Orocos Real-Time Toolkit
2.5.0
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A connection element that stores a single data sample. More...
#include <rtt/internal/ChannelDataElement.hpp>
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. | |
virtual FlowStatus | read (reference_t sample, bool copy_old_data) |
Reads the last sample given to write() | |
virtual void | clear () |
Resets the stored sample. | |
virtual bool | data_sample (param_t sample) |
Provides a data sample to initialize this connection. | |
shared_ptr | getOutput () |
Returns the next channel element in the channel's propagation direction. | |
shared_ptr | getInput () |
Returns the current input channel element. | |
void | removeInput () |
Removes the input channel (if any). | |
ChannelElementBase::shared_ptr | getInputEndPoint () |
Returns the first input channel element of this connection. | |
ChannelElementBase::shared_ptr | getOutputEndPoint () |
Returns the last output channel element of this connection. | |
void | setOutput (shared_ptr output) |
Sets the output of this channel element to output and sets the input of output to this. | |
virtual bool | signal () |
Signals that there is new data available on this channel By default, the channel element forwards the call to its output. | |
virtual bool | inputReady () |
This is called by an input port when it is ready to receive data. | |
virtual void | disconnect (bool forward) |
Performs a disconnection of this channel's endpoints. | |
virtual PortInterface * | getPort () const |
Gets the port this channel element is connected to. | |
Protected Member Functions | |
void | ref () |
Increases the reference count. | |
void | deref () |
Decreases the reference count, and deletes the object if it is zero. |
A connection element that stores a single data sample.
Definition at line 50 of file ChannelDataElement.hpp.
virtual void RTT::internal::ChannelDataElement< T >::clear | ( | ) | [inline, virtual] |
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.
virtual bool RTT::internal::ChannelDataElement< T >::data_sample | ( | param_t | sample | ) | [inline, virtual] |
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.
Reimplemented from RTT::base::ChannelElement< T >.
Definition at line 104 of file ChannelDataElement.hpp.
void ChannelElementBase::disconnect | ( | bool | forward | ) | [virtual, inherited] |
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 75 of file ChannelInterface.cpp.
References RTT::base::ChannelElementBase::getInput(), and RTT::base::ChannelElementBase::getOutput().
shared_ptr RTT::base::ChannelElement< T >::getInput | ( | ) | [inline, inherited] |
Returns the current input channel element.
This will only return a valid channel element if another element has received this object as an argument to setOutput().
Reimplemented from RTT::base::ChannelElementBase.
Definition at line 68 of file ChannelElement.hpp.
Referenced by 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.
Definition at line 96 of file ChannelInterface.cpp.
References RTT::base::ChannelElementBase::getInput().
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.
Definition at line 101 of file ChannelInterface.cpp.
References RTT::base::ChannelElementBase::getOutput().
PortInterface * ChannelElementBase::getPort | ( | ) | const [virtual, inherited] |
Gets the port this channel element is connected to.
Reimplemented in RTT::internal::ConnOutputEndpoint< T >, and RTT::internal::ConnInputEndpoint< T >.
Definition at line 131 of file ChannelInterface.cpp.
bool ChannelElementBase::inputReady | ( | ) | [virtual, inherited] |
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.
Reimplemented in RTT::corba::RemoteChannelElement< T >, RTT::mqueue::MQChannelElement< T >, RTT::internal::ConnOutputEndpoint< T >, and RTT::internal::ConnInputEndpoint< T >.
Definition at line 107 of file ChannelInterface.cpp.
References RTT::base::ChannelElementBase::getInput().
virtual FlowStatus RTT::internal::ChannelDataElement< T >::read | ( | reference_t | sample, |
bool | copy_old_data | ||
) | [inline, virtual] |
Reads the last sample given to write()
Reimplemented from RTT::base::ChannelElement< T >.
Definition at line 76 of file ChannelDataElement.hpp.
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.
output | the next element in chain. |
Definition at line 68 of file ChannelInterface.cpp.
Referenced by RTT::internal::ConnFactory::buildBufferedChannelInput(), RTT::internal::ConnFactory::buildBufferedChannelOutput(), and RTT::internal::ConnFactory::buildChannelInput().
bool ChannelElementBase::signal | ( | ) | [virtual, inherited] |
Signals that there is new data available on this channel By default, the channel element forwards the call to its output.
Reimplemented in RTT::mqueue::MQChannelElement< T >, RTT::corba::RemoteChannelElement< T >, and RTT::internal::ConnOutputEndpoint< T >.
Definition at line 123 of file ChannelInterface.cpp.
References RTT::base::ChannelElementBase::getOutput().
Referenced by RTT::internal::ChannelDataElement< T >::write(), and RTT::internal::ChannelBufferElement< T >::write().
virtual bool RTT::internal::ChannelDataElement< T >::write | ( | param_t | sample | ) | [inline, virtual] |
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::ChannelElementBase::signal().