epics::pvDatabase::ChannelGetLocal Class Reference

Inheritance diagram for epics::pvDatabase::ChannelGetLocal:

Collaboration diagram for epics::pvDatabase::ChannelGetLocal:

Public Member Functions
	POINTER_DEFINITIONS (ChannelGetLocal)
virtual	~ChannelGetLocal ()
virtual void	destroy ()
virtual void	get ()
virtual std::tr1::shared_ptr< Channel >	getChannel ()
virtual void	cancel ()
virtual void	lock ()
virtual void	unlock ()
virtual void	lastRequest ()
Public Member Functions inherited from epics::pvAccess::ChannelGet
	POINTER_DEFINITIONS (ChannelGet)
virtual	~ChannelGet ()
Public Member Functions inherited from epics::pvAccess::ChannelRequest
	POINTER_DEFINITIONS (ChannelRequest)
	ChannelRequest ()
virtual	~ChannelRequest ()
Public Member Functions inherited from epics::pvAccess::Destroyable
	POINTER_DEFINITIONS (Destroyable)
Public Member Functions inherited from epics::pvAccess::Lockable
	POINTER_DEFINITIONS (Lockable)
virtual	~Lockable ()

Static Public Member Functions
static ChannelGetLocalPtr	create (ChannelLocalPtr const &channelLocal, ChannelGetRequester::shared_pointer const &channelGetRequester, PVStructurePtr const &pvRequest, PVRecordPtr const &pvRecord)

Additional Inherited Members
Public Types inherited from epics::pvAccess::ChannelGet
typedef ChannelGetRequester	requester_type
Static Public Attributes inherited from epics::pvAccess::ChannelRequest
static size_t	num_instances
Protected Member Functions inherited from epics::pvAccess::Destroyable
virtual	~Destroyable ()

Detailed Description

Definition at line 206 of file channelLocal.cpp.

Constructor & Destructor Documentation

epics::pvDatabase::ChannelGetLocal::~ChannelGetLocal ( )

virtual

Definition at line 302 of file channelLocal.cpp.

{
//cout << "~ChannelGetLocal()\n";
}

Member Function Documentation

virtual void epics::pvDatabase::ChannelGetLocal::cancel ( )

inlinevirtual

Cancel any pending request. Completion will be reported via request's response callback:

• if cancel() request is issued after the request was already complete, request success/failure completion will be reported and cancel() request ignored.
• if the request was actually canceled, cancellation completion is reported.

Implements epics::pvAccess::ChannelRequest.

Definition at line 221 of file channelLocal.cpp.

{}

ChannelGetLocalPtr epics::pvDatabase::ChannelGetLocal::create ( ChannelLocalPtr const &  channelLocal, ChannelGetRequester::shared_pointer const &  channelGetRequester, PVStructurePtr const &  pvRequest, PVRecordPtr const &  pvRecord  )

static

Definition at line 260 of file channelLocal.cpp.

{
    PVCopyPtr pvCopy = PVCopy::create(
        pvRecord->getPVRecordStructure()->getPVStructure(),
        pvRequest,
        "");
    if(!pvCopy) {
        Status status(
            Status::STATUSTYPE_ERROR,
            "invalid pvRequest");
        ChannelGet::shared_pointer channelGet;
        channelGetRequester->channelGetConnect(
            status,
            channelGet,
            nullStructure);
        ChannelGetLocalPtr localGet;
        return localGet;
    }
    PVStructurePtr pvStructure = pvCopy->createPVStructure();
    BitSetPtr   bitSet(new BitSet(pvStructure->getNumberFields()));
    ChannelGetLocalPtr get(new ChannelGetLocal(
        getProcess(pvRequest,false),
        channelLocal,
        channelGetRequester,
        pvCopy,
        pvStructure,
        bitSet,
        pvRecord));
    if(pvRecord->getTraceLevel()>0)
    {
        cout << "ChannelGetLocal::create";
        cout << " recordName " << pvRecord->getRecordName() << endl;
    }
    channelGetRequester->channelGetConnect(
        Status::Ok,get,pvStructure->getStructure());
    return get;
}

virtual void epics::pvDatabase::ChannelGetLocal::destroy ( )

inlinevirtual

Destroy this instance.

Implements epics::pvAccess::Destroyable.

Definition at line 213 of file channelLocal.cpp.

{} // DEPRECATED

void epics::pvDatabase::ChannelGetLocal::get ( )

virtual

Get data from the channel.

Ownership of the PVStructure passed to ChannelGetRequester::getDone() is returned to the ChannelGet.

Completion status is reported by calling ChannelGetRequester::getDone() callback.

Implements epics::pvAccess::ChannelGet.

Definition at line 327 of file channelLocal.cpp.

{
    ChannelGetRequester::shared_pointer requester = channelGetRequester.lock();
    if(!requester) return;
    PVRecordPtr pvr(pvRecord.lock());
    if(!pvr) throw std::logic_error("pvRecord is deleted");
    try {
        bool notifyClient = true;
        bitSet->clear();
        {
            epicsGuard <PVRecord> guard(*pvr);
            if(callProcess) {
                pvr->beginGroupPut();
                pvr->process();
                pvr->endGroupPut();
            }
            notifyClient = pvCopy->updateCopySetBitSet(pvStructure, bitSet);
        }
        if(firstTime) {
            bitSet->clear();
            bitSet->set(0);
            firstTime = false;
            notifyClient = true;
        }
        if(notifyClient) {
            requester->getDone(
                Status::Ok,
                getPtrSelf(),
                pvStructure,
                bitSet);
            bitSet->clear();
        } else {
            BitSetPtr temp(new BitSet(bitSet->size()));
            requester->getDone(
                Status::Ok,
                getPtrSelf(),
                pvStructure,
                temp);
        }
        if(pvr->getTraceLevel()>1)
        {
            cout << "ChannelGetLocal::get" << endl;
        }
    } catch(std::exception& ex) {
        Status status = Status(Status::STATUSTYPE_FATAL, ex.what());
        requester->getDone(status,getPtrSelf(),pvStructure,bitSet);
    }

}

std::tr1::shared_ptr< Channel > epics::pvDatabase::ChannelGetLocal::getChannel ( )

virtual

Get a channel instance this request belongs to.

Returns

the channel instance.

Implements epics::pvAccess::ChannelRequest.

Definition at line 307 of file channelLocal.cpp.

{
   ChannelLocalPtr channel(channelLocal.lock());
   return channel;
}

virtual void epics::pvDatabase::ChannelGetLocal::lastRequest ( )

inlinevirtual

Announce next request as last request. When last request will be completed (regardless of completion status) the remote and local instance will be destroyed.

Implements epics::pvAccess::ChannelRequest.

Definition at line 224 of file channelLocal.cpp.

{}

void epics::pvDatabase::ChannelGetLocal::lock ( )

virtual

Reimplemented from epics::pvAccess::Lockable.

Definition at line 313 of file channelLocal.cpp.

{
    PVRecordPtr pvr(pvRecord.lock());
    if(!pvr) throw std::logic_error("pvRecord is deleted");
    pvr->lock();
}

epics::pvDatabase::ChannelGetLocal::POINTER_DEFINITIONS

(

ChannelGetLocal

)

void epics::pvDatabase::ChannelGetLocal::unlock ( )

virtual

Reimplemented from epics::pvAccess::Lockable.

Definition at line 319 of file channelLocal.cpp.

{
    PVRecordPtr pvr(pvRecord.lock());
    if(!pvr) throw std::logic_error("pvRecord is deleted");
    pvr->unlock();
}

---

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

• modules/pvDatabase/src/pvAccess/channelLocal.cpp