bool SerialPort::waitForData(const Misc::Time& timeout) const
{
/* Check if there is unread data in the buffer: */
if(getUnreadDataSize()>0)
return true;
/* Wait for data on the socket and return whether data is available: */
Misc::FdSet readFds(fd);
return Misc::pselect(&readFds,0,0,timeout)>=0&&readFds.isSet(fd);
}
bool TCPPipeSlave::waitForData(const Misc::Time& timeout) const
{
/* Check if there is unread data in the buffer: */
if(getUnreadDataSize()>0)
return true;
/* Read the status packet from the master node: */
Packet* statusPacket=multiplexer->receivePacket(pipeId);
Packet::Reader reader(statusPacket);
int result=reader.read<int>();
multiplexer->deletePacket(statusPacket);
return result!=0;
}
bool TCPPipeMaster::waitForData(const Misc::Time& timeout) const
{
/* Check if there is unread data in the buffer: */
if(getUnreadDataSize()>0)
return true;
/* Wait for data on the socket and return whether data is available: */
Misc::FdSet readFds(fd);
bool result=Misc::pselect(&readFds,0,0,timeout)>=0&&readFds.isSet(fd);
/* Send a status message to the slaves: */
Packet* statusPacket=multiplexer->newPacket();
{
Packet::Writer writer(statusPacket);
writer.write<int>(result?1:0);
}
multiplexer->sendPacket(pipeId,statusPacket);
return result;
}
bool TCPPipeSlave::waitForData(const Misc::Time& timeout) const
{
if(isReadCoupled())
{
/* Check if there is unread data in the buffer: */
if(getUnreadDataSize()>0)
return true;
/* Read the status packet from the master node: */
Packet* statusPacket=multiplexer->receivePacket(pipeId);
Packet::Reader reader(statusPacket);
int result=reader.read<int>();
multiplexer->deletePacket(statusPacket);
return result!=0;
}
else
{
/* Return no new data; slave shouldn't be reading in decoupled state: */
return false;
}
}
