102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* pvAccessCPP is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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#define epicsExportSharedSymbols
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#include <pv/beaconHandler.h>
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#include <pv/transportRegistry.h>
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using namespace std;
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using namespace epics::pvData;
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using namespace epics::pvAccess;
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namespace epics {
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namespace pvAccess {
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BeaconHandler::BeaconHandler(Context::shared_pointer const & context,
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const osiSockAddr* responseFrom) :
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_context(Context::weak_pointer(context)),
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_responseFrom(*responseFrom),
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_mutex(),
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_serverGUID(),
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_serverChangeCount(-1),
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_first(true)
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{
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}
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BeaconHandler::~BeaconHandler()
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{
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}
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void BeaconHandler::beaconNotify(osiSockAddr* /*from*/, int8 remoteTransportRevision,
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TimeStamp* timestamp, ServerGUID const & guid, int16 sequentalID,
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int16 changeCount,
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PVFieldPtr /*data*/)
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{
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bool networkChanged = updateBeacon(remoteTransportRevision, timestamp, guid, sequentalID, changeCount);
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if (networkChanged)
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changedTransport();
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}
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bool BeaconHandler::updateBeacon(int8 /*remoteTransportRevision*/, TimeStamp* /*timestamp*/,
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ServerGUID const & guid, int16 /*sequentalID*/, int16 changeCount)
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{
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Lock guard(_mutex);
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// first beacon notification check
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if (_first)
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{
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_first = false;
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_serverGUID = guid;
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_serverChangeCount = changeCount;
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// new server up..
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_context.lock()->newServerDetected();
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return false;
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}
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bool networkChange = (memcmp(_serverGUID.value, guid.value, sizeof(guid.value)) != 0);
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if (networkChange)
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{
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// update startup time and change count
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_serverGUID = guid;
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_serverChangeCount = changeCount;
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_context.lock()->newServerDetected();
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return true;
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}
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else if (_serverChangeCount != changeCount)
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{
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// update change count
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_serverChangeCount = changeCount;
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// TODO be more specific (possible optimizations)
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_context.lock()->newServerDetected();
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return true;
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}
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return false;
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}
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void BeaconHandler::changedTransport()
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{
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TransportRegistry::transportVector_t transports;
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_context.lock()->getTransportRegistry()->toArray(transports, &_responseFrom);
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// notify all
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for (TransportRegistry::transportVector_t::iterator iter(transports.begin()), end(transports.end());
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iter != end; iter++)
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{
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(*iter)->changedTransport();
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}
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}
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}
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}
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