// The "choose me" signal from a candidate.
void
ArbitMgr::doChoose(const Uint32* theData)
{
ArbitSignal aSignal;
aSignal.init(GSN_ARBIT_CHOOSEREQ, theData);
sendSignalToThread(aSignal);
}
// Stop arbitrator thread via stop signal from the kernel
// or when exiting API program.
void
ArbitMgr::doStop(const Uint32* theData)
{
DBUG_ENTER("ArbitMgr::doStop");
ArbitSignal aSignal;
NdbMutex_Lock(theThreadMutex);
if (theThread != NULL) {
aSignal.init(GSN_ARBIT_STOPORD, theData);
if (theData == 0) {
aSignal.data.code = StopExit;
} else {
aSignal.data.code = StopRequest;
}
sendSignalToThread(aSignal);
void* value;
NdbThread_WaitFor(theThread, &value);
NdbThread_Destroy(&theThread);
theState = StateInit;
}
NdbMutex_Unlock(theThreadMutex);
DBUG_VOID_RETURN;
}
// Start arbitrator thread. This is kernel request.
// First stop any previous thread since it is a left-over
// which was never used and which now has wrong ticket.
void
ArbitMgr::doStart(const Uint32* theData)
{
ArbitSignal aSignal;
NdbMutex_Lock(theThreadMutex);
if (theThread != NULL) {
aSignal.init(GSN_ARBIT_STOPORD, NULL);
aSignal.data.code = StopRestart;
sendSignalToThread(aSignal);
void* value;
NdbThread_WaitFor(theThread, &value);
NdbThread_Destroy(&theThread);
theState = StateInit;
theInputFull = false;
}
aSignal.init(GSN_ARBIT_STARTREQ, theData);
sendSignalToThread(aSignal);
theThread = NdbThread_Create(
runArbitMgr_C, (void**)this, 32768, "ndb_arbitmgr",
NDB_THREAD_PRIO_HIGH);
NdbMutex_Unlock(theThreadMutex);
}
void
ArbitMgr::sendSignalToThread(ArbitSignal& aSignal)
{
#ifdef DEBUG_ARBIT
char buf[17] = "";
ndbout << "arbit recv: ";
ndbout << " gsn=" << aSignal.gsn;
ndbout << " send=" << aSignal.data.sender;
ndbout << " code=" << aSignal.data.code;
ndbout << " node=" << aSignal.data.node;
ndbout << " ticket=" << aSignal.data.ticket.getText(buf, sizeof(buf));
ndbout << " mask=" << aSignal.data.mask.getText(buf, sizeof(buf));
ndbout << endl;
#endif
aSignal.setTimestamp(); // signal arrival time
NdbMutex_Lock(theInputMutex);
while (theInputFull) {
NdbCondition_WaitTimeout(theInputCond, theInputMutex, 1000);
}
theInputBuffer = aSignal;
theInputFull = true;
NdbCondition_Signal(theInputCond);
NdbMutex_Unlock(theInputMutex);
}