/*
* cac::beaconNotify
*/
void cac::beaconNotify ( const inetAddrID & addr, const epicsTime & currentTime,
ca_uint32_t beaconNumber, unsigned protocolRevision )
{
epicsGuard < epicsMutex > guard ( this->mutex );
if ( ! this->pudpiiu ) {
return;
}
/*
* look for it in the hash table
*/
bhe *pBHE = this->beaconTable.lookup ( addr );
if ( pBHE ) {
/*
* return if the beacon period has not changed significantly
*/
if ( ! pBHE->updatePeriod ( guard, this->programBeginTime,
currentTime, beaconNumber, protocolRevision ) ) {
return;
}
}
else {
/*
* This is the first beacon seen from this server.
* Wait until 2nd beacon is seen before deciding
* if it is a new server (or just the first
* time that we have seen a server's beacon
* shortly after the program started up)
*/
pBHE = new ( this->bheFreeList )
bhe ( this->mutex, currentTime, beaconNumber, addr );
if ( pBHE ) {
if ( this->beaconTable.add ( *pBHE ) < 0 ) {
pBHE->~bhe ();
this->bheFreeList.release ( pBHE );
}
}
return;
}
this->beaconAnomalyCount++;
this->pudpiiu->beaconAnomalyNotify ( guard );
# ifdef DEBUG
{
char buf[128];
addr.name ( buf, sizeof ( buf ) );
::printf ( "New server available: %s\n", buf );
}
# endif
}
/*
* set average to -1.0 so that when the next beacon
* occurs we can distinguish between:
* o new server
* o existing server's beacon we are seeing
* for the first time shortly after program
* start up
*
* if creating this in response to a search reply
* and not in response to a beacon then
* we set the beacon time stamp to
* zero (so we can correctly compute the period
* between the 1st and 2nd beacons)
*/
bhe::bhe ( epicsMutex & mutexIn, const epicsTime & initialTimeStamp,
unsigned initialBeaconNumber, const inetAddrID & addr ) :
inetAddrID ( addr ), timeStamp ( initialTimeStamp ), averagePeriod ( - DBL_MAX ),
mutex ( mutexIn ), pIIU ( 0 ), lastBeaconNumber ( initialBeaconNumber )
{
# ifdef DEBUG
{
char name[64];
addr.name ( name, sizeof ( name ) );
::printf ( "created beacon entry for %s\n", name );
}
# endif
}