Re: I'm looking for a pvacces example to read PVStructure

[Heinz Junkes via Tech-talk <tech-talk@aps.anl.gov>]

Hi Will,

thanks for looking it up. But I always seem to try the examples that don't work.

E.G. getputmonitor.cpp

(https://github.com/epics-base/exampleCPP/blob/master/exampleClient/src/getputmonitor.cpp)

In file included from ../getputmonitor.cpp:16:

/Users/junkes/ABER_JETZT/epics-base/include/pv/pvaClient.h:1736:10: warning: 'epics::pvaClient::PvaClientMonitor::monitorConnect' hides overloaded virtual function [-Woverloaded-virtual]

    void monitorConnect(

         ^

/Users/junkes/ABER_JETZT/epics-base/include/pv/pvaClient.h:1603:18: note: hidden overloaded virtual function 'epics::pvaClient::PvaClientMonitorRequester::monitorConnect' declared here: type mismatch at 2nd parameter ('const epics::pvaClient::PvaClientMonitorPtr &' (aka 'const shared_ptr<epics::pvaClient::PvaClientMonitor> &') vs 'const epics::pvData::MonitorPtr &' (aka 'const shared_ptr<epics::pvAccess::Monitor> &'))

    virtual void monitorConnect(epics::pvData::Status const & status,

                 ^

/Users/junkes/ABER_JETZT/epics-base/include/pv/pvaClient.h:1740:10: warning: 'epics::pvaClient::PvaClientMonitor::unlisten' hides overloaded virtual function [-Woverloaded-virtual]

    void unlisten(epics::pvData::MonitorPtr const & monitor);

         ^

/Users/junkes/ABER_JETZT/epics-base/include/pv/pvaClient.h:1616:18: note: hidden overloaded virtual function 'epics::pvaClient::PvaClientMonitorRequester::unlisten' declared here: different number of parameters (0 vs 1)

    virtual void unlisten()

                 ^

2 warnings generated.

c++ -o myEx  -L/Users/junkes/pvTest/lib/darwin-x86 -L/Users/junkes/ABER_JETZT/epics-base/lib/darwin-x86        -arch x86_64            myEx_registerRecordDeviceDriver.o getputmonitor.o    -lmyExSupport -lqsrv -lpvAccessIOC -lpvAccessCA -lpvAccess -lpvData -ldbRecStd -ldbCore -lca -lCom   

Undefined symbols for architecture x86_64:

  "epics::pvaClient::PvaClientGet::issueConnect()", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientGet::setRequester(std::__1::shared_ptr<epics::pvaClient::PvaClientGetRequester> const&)", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientGet::get()", referenced from:

      ClientGetPutMonitor::get() in getputmonitor.o

  "epics::pvaClient::PvaClientGet::getData()", referenced from:

      ClientGetPutMonitor::get() in getputmonitor.o

  "epics::pvaClient::PvaClientPut::issueConnect()", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientPut::setRequester(std::__1::shared_ptr<epics::pvaClient::PvaClientPutRequester> const&)", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientPut::getData()", referenced from:

      ClientGetPutMonitor::put(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in getputmonitor.o

      ClientGetPutMonitor::getDone(epics::pvData::Status const&, std::__1::shared_ptr<epics::pvaClient::PvaClientPut> const&) in getputmonitor.o

  "epics::pvaClient::PvaClientPut::issuePut()", referenced from:

      ClientGetPutMonitor::put(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in getputmonitor.o

  "epics::pvaClient::PvaClientChannel::issueConnect()", referenced from:

      ClientGetPutMonitor::init(std::__1::shared_ptr<epics::pvaClient::PvaClient> const&) in getputmonitor.o

  "epics::pvaClient::PvaClientChannel::createMonitor(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientChannel::setStateChangeRequester(std::__1::shared_ptr<epics::pvaClient::PvaClientChannelStateChangeRequester> const&)", referenced from:

      ClientGetPutMonitor::init(std::__1::shared_ptr<epics::pvaClient::PvaClient> const&) in getputmonitor.o

  "epics::pvaClient::PvaClientChannel::createGet(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientChannel::createPut(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientGetData::showChanged(std::__1::basic_ostream<char, std::__1::char_traits<char> >&)", referenced from:

      ClientGetPutMonitor::get() in getputmonitor.o

  "epics::pvaClient::PvaClientGetData::getChangedBitSet()", referenced from:

      ClientGetPutMonitor::get() in getputmonitor.o

  "epics::pvaClient::PvaClientMonitor::issueConnect()", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientMonitor::releaseEvent()", referenced from:

      ClientGetPutMonitor::event(std::__1::shared_ptr<epics::pvaClient::PvaClientMonitor> const&) in getputmonitor.o

  "epics::pvaClient::PvaClientMonitor::setRequester(std::__1::shared_ptr<epics::pvaClient::PvaClientMonitorRequester> const&)", referenced from:

      ClientGetPutMonitor::channelStateChange(std::__1::shared_ptr<epics::pvaClient::PvaClientChannel> const&, bool) in getputmonitor.o

  "epics::pvaClient::PvaClientMonitor::poll()", referenced from:

      ClientGetPutMonitor::event(std::__1::shared_ptr<epics::pvaClient::PvaClientMonitor> const&) in getputmonitor.o

  "epics::pvaClient::PvaClientMonitor::stop()", referenced from:

      simple(char*) in getputmonitor.o

  "epics::pvaClient::PvaClientMonitor::start()", referenced from:

      simple(char*) in getputmonitor.o

      ClientGetPutMonitor::monitorConnect(epics::pvData::Status const&, std::__1::shared_ptr<epics::pvaClient::PvaClientMonitor> const&, std::__1::shared_ptr<epics::pvData::Structure const> const&) in getputmonitor.o

      non-virtual thunk to ClientGetPutMonitor::monitorConnect(epics::pvData::Status const&, std::__1::shared_ptr<epics::pvaClient::PvaClientMonitor> const&, std::__1::shared_ptr<epics::pvData::Structure const> const&) in getputmonitor.o

  "epics::pvaClient::PvaClientMonitor::getData()", referenced from:

      ClientGetPutMonitor::event(std::__1::shared_ptr<epics::pvaClient::PvaClientMonitor> const&) in getputmonitor.o

  "epics::pvaClient::PvaClientPutData::getPVStructure()", referenced from:

      ClientGetPutMonitor::put(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in getputmonitor.o

      ClientGetPutMonitor::getDone(epics::pvData::Status const&, std::__1::shared_ptr<epics::pvaClient::PvaClientPut> const&) in getputmonitor.o

  "epics::pvaClient::PvaClientMonitorData::showChanged(std::__1::basic_ostream<char, std::__1::char_traits<char> >&)", referenced from:

      ClientGetPutMonitor::event(std::__1::shared_ptr<epics::pvaClient::PvaClientMonitor> const&) in getputmonitor.o

  "epics::pvaClient::PvaClient::createChannel(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:

      ClientGetPutMonitor::init(std::__1::shared_ptr<epics::pvaClient::PvaClient> const&) in getputmonitor.o

  "epics::pvaClient::PvaClient::get(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from:

      simple(char*) in getputmonitor.o

ld: symbol(s) not found for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

make[3]: *** [myEx] Error 1

make[2]: *** [install.darwin-x86] Error 2

make[1]: *** [src.install] Error 2

make: *** [myExApp.install] Error 2

On 12. Mar 2019, at 09:57, will.rogers@diamond.ac.uk wrote:

Hi Heinz,


I have recently tested some of the examples in https://github.com/epics-base/exampleCPP and they are working with EPICS 7.0.2.


Cheers,

Will


________________________________
From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> on behalf of Heinz Junkes via Tech-talk <tech-talk@aps.anl.gov>
Sent: 11 March 2019 16:41:54
To: tech-talk
Subject: I'm looking for a pvacces example to read PVStructure

I'm looking for a pva example c++ program which I can currently use (with Epics 7).

Unfortunately the examples I've found on the net don't work at all.

Above all, there seems to be a little confusion between PVAClient and pvac? (Or I don't get it)

I have a client that wants to read the PVStructure of a PV and then put new data  into
NTTable vector fields (x, y, z and time_index):

humma-kavula:~ junkes$ pvlist 0xB9EC6A5C00000000C2AFA421
CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK

humma-kavula:~ junkes$ pvinfo CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK
CHANNEL  : CRYVISIL:STM:FASTSCAN:IMAGE_CHUNK
STATE    : CONNECTED
ADDRESS  : 141.14.133.59:53379
epics:nt/NTTable:1.0
   string[] labels
   structure value
       double[] x
       double[] y
       double[] z
       int[] time_index
   string descriptor
   alarm_t alarm
       int severity
       int status
       string message
   time_t timeStamp
       long secondsPastEpoch
       int nanoseconds
       int userTag
   int counter


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