< ChannelElementBase >
|virtual void||clear ()|
|virtual void||disconnect (bool forward)|
|virtual PortInterface *||getPort () const|
|virtual bool||inputReady ()|
|void||setOutput (shared_ptr output)|
|virtual bool||signal ()|
|void RTT_API||intrusive_ptr_add_ref (ChannelElementBase *e)|
|void RTT_API||intrusive_ptr_release (ChannelElementBase *e)|
In the data flow implementation, a channel is created by chaining ChannelElementBase objects.
ChannelElementBase objects are refcounted. In the chain, an element maintains the refcount for its successor, and holds a simple pointer to its predecessor.
Clears any data stored by the channel. It means that ChannelElement::read() will return false afterwards (provided that no new data has been written on the meantime of course)
By default, the channel element forwards the calls to its input
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.
Gets the port this channel element is connected to.
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.
Removes the input channel (if any). This call may delete channels from memory.
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.|
Signals that there is new data available on this channel By default, the channel element forwards the call to its output