ChimeraTK::async::AsyncVariableImpl< UserType > Struct Template Reference

AsyncVariableImpl contains a weak pointer to an AsyncNDRegisterAccessor<UserType> and a send buffer NDRegisterAccessor<UserType>::Buffer. More...

#include <AsyncAccessorManager.h>

Inheritance diagram for ChimeraTK::async::AsyncVariableImpl< UserType >:

Collaboration diagram for ChimeraTK::async::AsyncVariableImpl< UserType >:

Public Member Functions
	AsyncVariableImpl (size_t nChannels, size_t nElements)
void	send () final
	Send the value from the _sendBuffer of the AsyncVariableImpl.
void	sendException (std::exception_ptr e) final
	Send an exception to all subscribers.
unsigned int	getNumberOfChannels () override
	Helper functions for the creation of an AsyncNDRegisterAccessor.
unsigned int	getNumberOfSamples () override
Public Member Functions inherited from ChimeraTK::async::AsyncVariable
virtual	~AsyncVariable ()=default
virtual const std::string &	getUnit ()=0
virtual const std::string &	getDescription ()=0
virtual void	fillSendBuffer ()=0
	Fill the send buffer with data and version number.

Public Attributes
NDRegisterAccessor< UserType >::Buffer	_sendBuffer

Detailed Description

template<typename UserType>
struct ChimeraTK::async::AsyncVariableImpl< UserType >

AsyncVariableImpl contains a weak pointer to an AsyncNDRegisterAccessor<UserType> and a send buffer NDRegisterAccessor<UserType>::Buffer.

This class provides implementation for those functions of the AsyncVariable which touch the AsyncNDRegisterAccessor. It does implement the functions which provide the information needed to create an AsyncNDRegisterAccessor, like getNumberOfChannels(). These are backend specific and need a dedicated implementation per backend.

The AsyncVariableManager cannot hold a shared pointer of the AsyncNDRegisterAccessor because then you could never get rid of a created accessor, which means the manager would just keep growing in memory if accessors are dynamically created and removed. Hence a weak pointer is used, and this class provides all the functions that access this weak pointer and do all the locking and nullptr checking.

Definition at line 175 of file AsyncAccessorManager.h.

Constructor & Destructor Documentation

AsyncVariableImpl()

template<typename UserType >

ChimeraTK::async::AsyncVariableImpl< UserType >::AsyncVariableImpl	(	size_t	nChannels,
		size_t	nElements
	)

Definition at line 223 of file AsyncAccessorManager.h.

Member Function Documentation

getNumberOfChannels()

template<typename UserType >

unsigned int ChimeraTK::async::AsyncVariableImpl< UserType >::getNumberOfChannels ( )

overridevirtual

Helper functions for the creation of an AsyncNDRegisterAccessor.

As the creating code cannot use the catalogue, each backend has to implement these functions appropriately.

Implements ChimeraTK::async::AsyncVariable.

Reimplemented in ChimeraTK::async::PolledAsyncVariable< UserType >.

Definition at line 208 of file AsyncAccessorManager.h.

getNumberOfSamples()

template<typename UserType >

unsigned int ChimeraTK::async::AsyncVariableImpl< UserType >::getNumberOfSamples ( )

overridevirtual

Implements ChimeraTK::async::AsyncVariable.

Reimplemented in ChimeraTK::async::PolledAsyncVariable< UserType >.

Definition at line 214 of file AsyncAccessorManager.h.

send()

template<typename UserType >

void ChimeraTK::async::AsyncVariableImpl< UserType >::send ( )

finalvirtual

Send the value from the _sendBuffer of the AsyncVariableImpl.

The buffer has to be prepared before calling this function (incl. version number and data validity flag). The buffer is swapped out to avoid unnecessary copies. If you need a copy, you have to make one before calling this function.

Implements ChimeraTK::async::AsyncVariable.

Definition at line 228 of file AsyncAccessorManager.h.

sendException()

template<typename UserType >

void ChimeraTK::async::AsyncVariableImpl< UserType >::sendException ( std::exception_ptr  e )

finalvirtual

Send an exception to all subscribers.

Must only be called from within deactivateAsyncAndExecute().

Implements ChimeraTK::async::AsyncVariable.

Definition at line 199 of file AsyncAccessorManager.h.

Member Data Documentation

_sendBuffer

template<typename UserType >

NDRegisterAccessor<UserType>::Buffer ChimeraTK::async::AsyncVariableImpl< UserType >::_sendBuffer

Definition at line 183 of file AsyncAccessorManager.h.

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

• /scratch/dragon/sources/ChimeraTK-DeviceAccess/include/async/AsyncAccessorManager.h