116 lines
2.8 KiB
C++
116 lines
2.8 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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#ifndef BEACONHANDLER_H
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#define BEACONHANDLER_H
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#ifdef epicsExportSharedSymbols
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# define beaconHandlerEpicsExportSharedSymbols
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# undef epicsExportSharedSymbols
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#endif
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#include <osiSock.h>
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#include <pv/timeStamp.h>
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#include <pv/lock.h>
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#ifdef beaconHandlerEpicsExportSharedSymbols
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# define epicsExportSharedSymbols
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# undef beaconHandlerEpicsExportSharedSymbols
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#endif
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#include <pv/remote.h>
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#include <pv/pvAccess.h>
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namespace epics {
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namespace pvAccess {
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/**
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* BeaconHandler
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*/
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class BeaconHandler
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{
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public:
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POINTER_DEFINITIONS(BeaconHandler);
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/**
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* Constructor.
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*/
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BeaconHandler(Context::shared_pointer const & context, std::string const & protocol,
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const osiSockAddr* responseFrom);
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virtual ~BeaconHandler();
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/**
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* Update beacon period and do analitical checks (server restared, routing problems, etc.)
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* @param from who is notifying.
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* @param remoteTransportRevision encoded (major, minor) revision.
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* @param guid server GUID.
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* @param sequentalID sequential ID.
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* @param changeCount change count.
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* @param data server status data, can be <code>NULL</code>.
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*/
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void beaconNotify(osiSockAddr* from,
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epics::pvData::int8 remoteTransportRevision,
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epics::pvData::TimeStamp* timestamp,
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GUID const &guid,
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epics::pvData::int16 sequentalID,
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epics::pvData::int16 changeCount,
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epics::pvData::PVFieldPtr data);
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private:
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/**
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* Context instance.
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*/
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Context::weak_pointer _context;
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/**
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* The procotol (transport), "tcp" for pvAccess TCP/IP.
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*/
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std::string _protocol;
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/**
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* Remote address.
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*/
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const osiSockAddr _responseFrom;
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/**
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* Mutex
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*/
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epics::pvData::Mutex _mutex;
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/**
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* Server GUID.
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*/
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GUID _serverGUID;
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/**
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* Server startup timestamp.
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*/
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epics::pvData::int16 _serverChangeCount;
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/**
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* First beacon flag.
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*/
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bool _first;
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/**
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* Update beacon.
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* @param remoteTransportRevision encoded (major, minor) revision.
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* @param timestamp time when beacon was received.
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* @param guid server GUID.
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* @param sequentalID sequential ID.
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* @param changeCount change count.
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* @return network change (server restarted) detected.
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*/
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bool updateBeacon(epics::pvData::int8 remoteTransportRevision,
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epics::pvData::TimeStamp* timestamp,
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GUID const &guid,
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epics::pvData::int16 sequentalID,
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epics::pvData::int16 changeCount);
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/**
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* Changed transport (server restarted) notify.
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*/
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void changedTransport();
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};
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}}
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#endif /* INTROSPECTIONREGISTRY_H */
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