416 lines
12 KiB
C++
416 lines
12 KiB
C++
#include <iostream>
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#include <pv/clientFactory.h>
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#include <pv/pvAccess.h>
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#include <stdio.h>
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#include <epicsStdlib.h>
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#include <epicsGetopt.h>
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#include <epicsThread.h>
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#include <pv/logger.h>
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#include <pv/lock.h>
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#include <vector>
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#include <string>
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#include <sstream>
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#include <pv/event.h>
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#include <epicsExit.h>
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#include "pvutils.cpp"
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#include <pv/convert.h>
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using namespace std;
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using namespace std::tr1;
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using namespace epics::pvData;
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using namespace epics::pvAccess;
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#define DEFAULT_TIMEOUT 3.0
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#define DEFAULT_REQUEST "field(value)"
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double timeOut = DEFAULT_TIMEOUT;
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string request(DEFAULT_REQUEST);
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enum PrintMode { ValueOnlyMode, StructureMode, TerseMode };
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PrintMode mode = ValueOnlyMode;
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char fieldSeparator = ' ';
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//PVStructure::shared_pointer pvRequest;
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void usage (void)
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{
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fprintf (stderr, "\nUsage: pvput [options] <PV name> <values>...\n\n"
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" -h: Help: Print this message\n"
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"options:\n"
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" -r <pv request>: Request, specifies what fields to return and options, default is '%s'\n"
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" -w <sec>: Wait time, specifies timeout, default is %f second(s)\n"
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" -t: Terse mode - print only successfully written value, without names\n"
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" -d: Enable debug output\n"
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" -F <ofs>: Use <ofs> as an alternate output field separator"
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"\nExample: pvput double01 1.234\n\n"
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, DEFAULT_REQUEST, DEFAULT_TIMEOUT);
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}
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struct AtomicBoolean_null_deleter
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{
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void operator()(void const *) const {}
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};
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// standard performance on set/clear, use of tr1::shared_ptr lock-free counter for get
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// alternative is to use boost::atomic
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class AtomicBoolean
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{
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public:
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AtomicBoolean() : counter(static_cast<void*>(0), AtomicBoolean_null_deleter()) {};
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void set() { mutex.lock(); setp = counter; mutex.unlock(); }
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void clear() { mutex.lock(); setp.reset(); mutex.unlock(); }
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bool get() const { return counter.use_count() == 2; }
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private:
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std::tr1::shared_ptr<void> counter;
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std::tr1::shared_ptr<void> setp;
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epics::pvData::Mutex mutex;
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};
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class ChannelPutRequesterImpl : public ChannelPutRequester
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{
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private:
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ChannelPut::shared_pointer m_channelPut;
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PVStructure::shared_pointer m_pvStructure;
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BitSet::shared_pointer m_bitSet;
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Mutex m_pointerMutex;
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Mutex m_eventMutex;
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auto_ptr<Event> m_event;
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String m_channelName;
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AtomicBoolean m_supressGetValue;
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public:
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ChannelPutRequesterImpl(String channelName) : m_channelName(channelName)
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{
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resetEvent();
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}
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virtual String getRequesterName()
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{
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return "ChannelPutRequesterImpl";
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}
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virtual void message(String const & message, MessageType messageType)
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{
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std::cerr << "[" << getRequesterName() << "] message(" << message << ", " << getMessageTypeName(messageType) << ")" << std::endl;
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}
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virtual void channelPutConnect(const epics::pvData::Status& status,
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ChannelPut::shared_pointer const & channelPut,
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epics::pvData::PVStructure::shared_pointer const & pvStructure,
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epics::pvData::BitSet::shared_pointer const & bitSet)
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{
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if (status.isSuccess())
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{
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// show warning
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if (!status.isOK())
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{
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std::cerr << "[" << m_channelName << "] channel put create: " << status.toString() << std::endl;
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}
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// assign smart pointers
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{
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Lock lock(m_pointerMutex);
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m_channelPut = channelPut;
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m_pvStructure = pvStructure;
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m_bitSet = bitSet;
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}
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// we always put all
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m_bitSet->set(0);
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// get immediately old value
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channelPut->get();
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}
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else
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{
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std::cerr << "[" << m_channelName << "] failed to create channel put: " << status.toString() << std::endl;
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}
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}
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virtual void getDone(const epics::pvData::Status& status)
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{
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if (status.isSuccess())
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{
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// show warning
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if (!status.isOK())
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{
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std::cerr << "[" << m_channelName << "] channel get: " << status.toString() << std::endl;
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}
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// access smart pointers
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// do not print old value in terseMode
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if (!m_supressGetValue.get())
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{
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Lock lock(m_pointerMutex);
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{
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// needed since we access the data
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ScopedLock dataLock(m_channelPut);
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if (mode == ValueOnlyMode)
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{
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PVField::shared_pointer value = m_pvStructure->getSubField("value");
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if (value.get() == 0)
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{
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std::cerr << "no 'value' field" << std::endl;
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return;
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}
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if (fieldSeparator == ' ' && value->getField()->getType() == scalar)
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std::cout << std::setw(30) << std::left << m_channelName;
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else
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std::cout << m_channelName;
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std::cout << fieldSeparator;
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terse(std::cout, value) << std::endl;
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}
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else if (mode == TerseMode)
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terseStructure(std::cout, m_pvStructure) << std::endl;
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else
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std::cout << std::endl << *(m_pvStructure.get()) << std::endl << std::endl;
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}
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}
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m_event->signal();
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}
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else
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{
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std::cerr << "[" << m_channelName << "] failed to get: " << status.toString() << std::endl;
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}
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}
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virtual void putDone(const epics::pvData::Status& status)
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{
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if (status.isSuccess())
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{
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// show warning
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if (!status.isOK())
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{
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std::cerr << "[" << m_channelName << "] channel put: " << status.toString() << std::endl;
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}
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m_event->signal();
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}
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else
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{
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std::cerr << "[" << m_channelName << "] failed to get: " << status.toString() << std::endl;
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}
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}
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PVStructure::shared_pointer getStructure()
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{
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Lock lock(m_pointerMutex);
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return m_pvStructure;
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}
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void resetEvent()
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{
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Lock lock(m_eventMutex);
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m_event.reset(new Event());
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}
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bool waitUntilDone(double timeOut)
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{
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Event* event;
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{
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Lock lock(m_eventMutex);
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event = m_event.get();
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}
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return event->wait(timeOut);
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}
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void supressGetValue(bool flag)
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{
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if (flag)
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m_supressGetValue.set();
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else
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m_supressGetValue.clear();
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}
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};
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/*+**************************************************************************
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*
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* Function: main
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*
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* Description: pvput main()
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* Evaluate command line options, set up CA, connect the
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* channels, print the data as requested
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*
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* Arg(s) In: [options] <pv-name> <values>...
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*
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* Arg(s) Out: none
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*
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* Return(s): Standard return code (0=success, 1=error)
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*
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**************************************************************************-*/
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int main (int argc, char *argv[])
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{
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int opt; /* getopt() current option */
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bool debug = false;
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setvbuf(stdout,NULL,_IOLBF,BUFSIZ); /* Set stdout to line buffering */
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while ((opt = getopt(argc, argv, ":hr:w:tdF:")) != -1) {
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switch (opt) {
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case 'h': /* Print usage */
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usage();
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return 0;
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case 'w': /* Set CA timeout value */
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if(epicsScanDouble(optarg, &timeOut) != 1)
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{
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fprintf(stderr, "'%s' is not a valid timeout value "
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"- ignored. ('pvput -h' for help.)\n", optarg);
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timeOut = DEFAULT_TIMEOUT;
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}
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break;
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case 'r': /* Set CA timeout value */
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request = optarg;
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// do not override terse mode
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if (mode == ValueOnlyMode) mode = StructureMode;
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break;
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case 't': /* Terse mode */
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mode = TerseMode;
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break;
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case 'd': /* Debug log level */
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debug = true;
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break;
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case 'F': /* Store this for output formatting */
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fieldSeparator = (char) *optarg;
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break;
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case '?':
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fprintf(stderr,
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"Unrecognized option: '-%c'. ('pvput -h' for help.)\n",
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optopt);
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return 1;
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case ':':
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fprintf(stderr,
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"Option '-%c' requires an argument. ('pvput -h' for help.)\n",
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optopt);
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return 1;
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default :
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usage();
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return 1;
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}
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}
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if (argc <= optind)
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{
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fprintf(stderr, "No pv name specified. ('pvput -h' for help.)\n");
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return 1;
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}
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string pvName = argv[optind++];
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int nVals = argc - optind; /* Remaining arg list are PV names */
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if (nVals < 1)
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{
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fprintf(stderr, "No value(s) specified. ('pvput -h' for help.)\n");
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return 1;
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}
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vector<string> values; /* Array of values */
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for (int n = 0; optind < argc; n++, optind++)
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values.push_back(argv[optind]); /* Copy values from command line */
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Requester::shared_pointer requester(new RequesterImpl("pvput"));
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PVStructure::shared_pointer pvRequest = getCreateRequest()->createRequest(request, requester);
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if(pvRequest.get()==NULL) {
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fprintf(stderr, "failed to parse request string\n");
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return 1;
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}
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SET_LOG_LEVEL(debug ? logLevelDebug : logLevelError);
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std::cout << std::boolalpha;
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terseSeparator(fieldSeparator);
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ClientFactory::start();
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ChannelProvider::shared_pointer provider = getChannelAccess()->getProvider("pvAccess");
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bool allOK = true;
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try
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{
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do
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{
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// first connect
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shared_ptr<ChannelRequesterImpl> channelRequesterImpl(new ChannelRequesterImpl());
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Channel::shared_pointer channel = provider->createChannel(pvName, channelRequesterImpl);
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if (channelRequesterImpl->waitUntilConnected(timeOut))
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{
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shared_ptr<ChannelPutRequesterImpl> putRequesterImpl(new ChannelPutRequesterImpl(channel->getChannelName()));
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if (mode == TerseMode)
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putRequesterImpl->supressGetValue(true);
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else
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std::cout << "Old : ";
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ChannelPut::shared_pointer channelPut = channel->createChannelPut(putRequesterImpl, pvRequest);
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allOK &= putRequesterImpl->waitUntilDone(timeOut);
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if (allOK)
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{
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// convert value from string
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// since we access structure from another thread, we need to lock
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{
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ScopedLock lock(channelPut);
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// TODO SIGSEG
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getConvert()->fromString(putRequesterImpl->getStructure(), values);
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}
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// we do a put
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putRequesterImpl->resetEvent();
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channelPut->put(false);
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allOK &= putRequesterImpl->waitUntilDone(timeOut);
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if (allOK)
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{
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// and than a get again to verify put
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if (mode != TerseMode) std::cout << "New : ";
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putRequesterImpl->supressGetValue(false);
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putRequesterImpl->resetEvent();
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channelPut->get();
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allOK &= putRequesterImpl->waitUntilDone(timeOut);
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}
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}
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}
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else
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{
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allOK = false;
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channel->destroy();
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std::cerr << "[" << channel->getChannelName() << "] connection timeout" << std::endl;
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break;
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}
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}
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while (false);
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} catch (std::out_of_range& oor) {
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allOK = false;
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std::cerr << "parse error: not enough of values" << std::endl;
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} catch (std::exception& ex) {
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allOK = false;
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std::cerr << ex.what() << std::endl;
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} catch (...) {
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allOK = false;
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std::cerr << "unknown exception caught" << std::endl;
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}
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ClientFactory::stop();
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return allOK ? 0 : 1;
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}
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