A filter to block samples while disabled. More...

#include <DisableFilter.h>

Inheritance diagram for DisableFilter:

Public Member Functions
	DisableFilter (ProcessVariableListener *listener)
	Construct a DisableFilter. More...

OrderedMutex &	getMutex ()
	Allow concurrent access from ProcessVariableListener and enable/disable. More...

void	disable (Guard &guard)
	Temporarily disable sampling. More...

void	enable (Guard &guard, ProcessVariable &pv, const epicsTime &when)
	Re-enable sampling. More...

void	pvConnected (ProcessVariable &pv, const epicsTime &when)
	React to connection, then pass on to listener. More...

void	pvDisconnected (ProcessVariable &pv, const epicsTime &when)
	React to disconnect, then pass on to listener. More...

void	pvValue (ProcessVariable &pv, const RawValue::Data *data)
	React to new value and filter it. More...

Public Member Functions inherited from ProcessVariableFilter
	ProcessVariableFilter (ProcessVariableListener *listener)
	Create a PV filter which passes filtered events on to the provided listener.

Public Member Functions inherited from ProcessVariableStateListener
virtual	~ProcessVariableStateListener ()
	Constructor.

Detailed Description

A filter to block samples while disabled.

Meant to be installed right after the ProcessVariable:

When the SampleMechanism is disabled, it instructs the DisableFilter to block all further samples. Actually, it keeps a copy of the most recent sample, so we start out with that last good sample when 'enabled' again, without having to wait for another new sample.