Hi,
I have followed the directives from the client/server tutorial and
from one of the entries to roottalk to send/receive a TClonesArray:
sender code:
fEmCal = new TClonesArray("CAREmCell", 4);
for (Int_t i=0; i<4; i++){
new( (*fEmCal)[i]) CAREmCell(i, i*10, i*20, i*30) ;
}
TMessage mess(kMESS_OBJECT); // sends a message
mess.Reset();
mess.WriteObject(fEmCal);
fSocket->Send(mess)
receiver code :
TSocket * s;
TMessage * mess=0;
TClonesArray * det=0;
s = fMonitor->Select();
s->SetOption(kNoBlock,0);
Int_t status = s->Recv(mess);
if (mess->What() == kMESS_OBJECT) {
TClass* clas = mess->GetClass();
if (clas) cout << clas->GetName() << endl ;
det = (TClonesArray *)mess->ReadObject(clas);
for (Int_t i=0; i < det->GetEntries(); i++){
CAREmCell * c = (CAREmCell *)(det->At(i));
// c->Print();
}
}
I get a segmentation fault on the line:
det = (TClonesArray *)mess->ReadObject(clas);
with the following traceback:
#2 0x........ in TBuffer::ReadObject()
#1 0x........ in TClonesArray::Streamer()
#0 0x........ in TClass::New()
It becomes really ennoying when I uncomment the line:
// c->Print();
then .... everything works fine!
Anybody has a clue to that ?
Thanks ... Yves
--
__________________________________________________________________
|Yves SCHUTZ (IN2P3 - CNRS) collaboration TAPS/WA98/ALICE |
|SUBATECH |
|Ecole des Mines de Nantes Telephone: (+33/0) 2 51 85 84 71 |
|4, rue Alfred Kastler Fax : (+33/0) 2 51 85 84 79 |
|F-44070 Nantes cedex 03 e-mail : yves.schutz@subatech.in2p3.fr|
|__________________________________________________________________|
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