public int select(ref UDTSOCKET[] readfds, ref UDTSOCKET[] writefds, ref UDTSOCKET[] exceptfds, timeval timeout)
{
Int64 entertime = CClock.getTime();
Int64 to;
if (null == timeout)
to = 0xFFFFFFFFFFFFFFFF;
else
to = timeout.tv_sec * 1000000 + timeout.tv_usec;
// initialize results
int count = 0;
HashSet<UDTSOCKET> rs = new HashSet<int>();
HashSet<UDTSOCKET> ws = new HashSet<int>();
HashSet<UDTSOCKET> es = new HashSet<int>();
// retrieve related UDT sockets
List<UdtSocket> ru = new List<UdtSocket>();
List<UdtSocket> wu = new List<UdtSocket>();
List<UdtSocket> eu = new List<UdtSocket>();
UdtSocket s;
if (null != readfds)
{
foreach (UDTSOCKET sockid in readfds)
{
if (UDTSTATUS.BROKEN == getStatus(sockid))
{
rs.Add(sockid);
++count;
}
else if (null == (s = locate(sockid)))
throw new CUDTException(5, 4, 0);
else
ru.Add(s);
}
}
if (null != writefds)
{
foreach (UDTSOCKET i2 in writefds)
{
if (UDTSTATUS.BROKEN == getStatus(i2))
{
ws.Add(i2);
++count;
}
else if (null == (s = locate(i2)))
throw new CUDTException(5, 4, 0);
else
wu.Add(s);
}
}
if (null != exceptfds)
{
//for (set<UDTSOCKET>::iterator i3 = exceptfds.begin(); i3 != exceptfds.end(); ++ i3)
foreach (UDTSOCKET i3 in exceptfds)
{
if (UDTSTATUS.BROKEN == getStatus(i3))
{
es.Add(i3);
++count;
}
else if (null == (s = locate(i3)))
throw new CUDTException(5, 4, 0);
else
eu.Add(s);
}
}
do
{
// query read sockets
//for (vector<UdtSocket*>::iterator j1 = ru.begin(); j1 != ru.end(); ++ j1)
foreach (UdtSocket j1 in ru)
{
s = j1;
if ((s.m_pUDT.m_bConnected && (s.m_pUDT.m_pRcvBuffer.getRcvDataSize() > 0) && ((s.m_pUDT.m_iSockType == UDTSockType.UDT_STREAM) || (s.m_pUDT.m_pRcvBuffer.getRcvMsgNum() > 0)))
|| (!s.m_pUDT.m_bListening && (s.m_pUDT.m_bBroken || !s.m_pUDT.m_bConnected))
|| (s.m_pUDT.m_bListening && (s.m_pQueuedSockets.size() > 0))
|| (s.m_Status == UDTSTATUS.CLOSED))
{
rs.insert(s.m_SocketID);
++count;
}
}
// query write sockets
//for (vector<UdtSocket*>::iterator j2 = wu.begin(); j2 != wu.end(); ++ j2)
foreach (UdtSocket j2 in wu)
{
s = j2;
if ((s.m_pUDT.m_bConnected && (s.m_pUDT.m_pSndBuffer.getCurrBufSize() < s.m_pUDT.m_iSndBufSize))
|| s.m_pUDT.m_bBroken || !s.m_pUDT.m_bConnected || (s.m_Status == UDTSTATUS.CLOSED))
{
ws.insert(s.m_SocketID);
++count;
}
}
// query exceptions on sockets
//for (vector<UdtSocket*>::iterator j3 = eu.begin(); j3 != eu.end(); ++ j3)
foreach (UdtSocket j3 in eu)
{
// check connection request status, not supported now
}
if (0 < count)
break;
CClock.waitForEvent();
} while (to > CClock.getTime() - entertime);
if (null != readfds)
readfds = rs.ToArray();
if (null != writefds)
writefds = ws.ToArray();
if (null != exceptfds)
exceptfds = es.ToArray();
return count;
}