public void Monitor(String addr, SocketEvent events)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
// Support deregistering monitoring endpoints as well
if (addr == null)
{
StopMonitor();
return;
}
string address;
string protocol;
DecodeAddress(addr, out address, out protocol);
CheckProtocol(protocol);
// Event notification only supported over inproc://
if (!protocol.Equals("inproc"))
{
throw NetMQException.Create(ErrorCode.EPROTONOSUPPORT);
}
// Register events to monitor
m_monitorEvents = events;
m_monitorSocket = Ctx.CreateSocket(ZmqSocketType.Pair);
if (m_monitorSocket == null)
{
throw NetMQException.Create(ErrorCode.EFAULT);
}
// Never block context termination on pending event messages
int linger = 0;
try
{
m_monitorSocket.SetSocketOption(ZmqSocketOptions.Linger, linger);
}
catch (NetMQException)
{
StopMonitor();
throw;
}
// Spawn the monitor socket endpoint
try
{
m_monitorSocket.Bind(addr);
}
catch (NetMQException)
{
StopMonitor();
throw;
}
}
// Processes commands sent to this socket (if any). If timeout is -1,
// returns only after at least one command was processed.
// If throttle argument is true, commands are processed at most once
// in a predefined time period.
private void ProcessCommands(int timeout, bool throttle)
{
Command cmd;
if (timeout != 0)
{
// If we are asked to wait, simply ask mailbox to wait.
cmd = m_mailbox.Recv(timeout);
}
else
{
// If we are asked not to wait, check whether we haven't processed
// commands recently, so that we can throttle the new commands.
// Get the CPU's tick counter. If 0, the counter is not available.
long tsc = Clock.Rdtsc();
// Optimised version of command processing - it doesn't have to check
// for incoming commands each time. It does so only if certain time
// elapsed since last command processing. Command delay varies
// depending on CPU speed: It's ~1ms on 3GHz CPU, ~2ms on 1.5GHz CPU
// etc. The optimisation makes sense only on platforms where getting
// a timestamp is a very cheap operation (tens of nanoseconds).
if (tsc != 0 && throttle)
{
// Check whether TSC haven't jumped backwards (in case of migration
// between CPU cores) and whether certain time have elapsed since
// last command processing. If it didn't do nothing.
if (tsc >= m_lastTsc && tsc - m_lastTsc <= Config.MaxCommandDelay)
{
return;
}
m_lastTsc = tsc;
}
// Check whether there are any commands pending for this thread.
cmd = m_mailbox.Recv(0);
}
// Process all the commands available at the moment.
while (true)
{
if (cmd == null)
{
break;
}
cmd.Destination.ProcessCommand(cmd);
cmd = m_mailbox.Recv(0);
}
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
}
public Object GetSocketOptionX(ZmqSocketOptions option)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
if (option == ZmqSocketOptions.ReceiveMore)
{
return(m_rcvMore ? 1 : 0);
}
if (option == ZmqSocketOptions.FD)
{
return(m_mailbox.FD);
}
if (option == ZmqSocketOptions.Events)
{
try
{
ProcessCommands(0, false);
}
catch (NetMQException ex)
{
Debug.Assert(false);
if (ex.ErrorCode == ErrorCode.EINTR || ex.ErrorCode == ErrorCode.ETERM)
{
return(-1);
}
else
{
throw;
}
}
int val = 0;
if (HasOut())
{
val |= ZMQ.ZmqPollout;
}
if (HasIn())
{
val |= ZMQ.ZmqPollin;
}
return(val);
}
// If the socket type doesn't support the option, pass it to
// the generic option parser.
return(m_options.GetSocketOption(option));
}
public int GetSocketOption(ZmqSocketOptions option)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
if (option == ZmqSocketOptions.ReceiveMore)
{
return(m_rcvMore ? 1 : 0);
}
if (option == ZmqSocketOptions.Events)
{
try
{
ProcessCommands(0, false);
}
catch (NetMQException ex)
{
if (ex.ErrorCode == ErrorCode.EINTR || ex.ErrorCode == ErrorCode.ETERM)
{
return(-1);
}
else
{
Debug.Assert(false);
throw;
}
}
PollEvents val = 0;
if (HasOut())
{
val |= PollEvents.PollOut;
}
if (HasIn())
{
val |= PollEvents.PollIn;
}
return((int)val);
}
return((int)GetSocketOptionX(option));
}
public bool TermEndpoint(String addr)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
// Check whether endpoint address passed to the function is valid.
if (addr == null)
{
throw InvalidException.Create();
}
// Process pending commands, if any, since there could be pending unprocessed process_own()'s
// (from launch_child() for example) we're asked to terminate now.
ProcessCommands(0, false);
if (!m_endpoints.ContainsKey(addr))
{
return(false);
}
foreach (var e in m_endpoints)
{
TermChild(e.Value);
}
m_endpoints.Clear();
// Find the endpoints range (if any) corresponding to the addr_ string.
//Iterator<Entry<String, Own>> it = endpoints.entrySet().iterator();
//while(it.hasNext()) {
// Entry<String, Own> e = it.next();
// term_child(e.getValue());
// it.remove();
//}
return(true);
}
public void SetSocketOption(ZmqSocketOptions option, Object optval)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
// First, check whether specific socket type overloads the option.
try
{
XSetSocketOption(option, optval);
return;
}
catch (InvalidException)
{
}
// If the socket type doesn't support the option, pass it to
// the generic option parser.
m_options.SetSocketOption(option, optval);
}
public SocketBase CreateSocket(ZmqSocketType type)
{
SocketBase s = null;
lock (m_slotSync)
{
if (m_starting)
{
m_starting = false;
// Initialise the array of mailboxes. Additional three slots are for
// zmq_term thread and reaper thread.
int ios;
int mazmq;
lock (m_optSync)
{
mazmq = m_maxSockets;
ios = m_ioThreadCount;
}
m_slotCount = mazmq + ios + 2;
m_slots = new Mailbox[m_slotCount];
//alloc_Debug.Assert(slots);
// Initialise the infrastructure for zmq_term thread.
m_slots[TermTid] = m_termMailbox;
// Create the reaper thread.
m_reaper = new Reaper(this, ReaperTid);
//alloc_Debug.Assert(reaper);
m_slots[ReaperTid] = m_reaper.Mailbox;
m_reaper.Start();
// Create I/O thread objects and launch them.
for (int i = 2; i != ios + 2; i++)
{
IOThread ioThread = new IOThread(this, i);
//alloc_Debug.Assert(io_thread);
m_ioThreads.Add(ioThread);
m_slots[i] = ioThread.Mailbox;
ioThread.Start();
}
// In the unused part of the slot array, create a list of empty slots.
for (int i = (int)m_slotCount - 1;
i >= (int)ios + 2; i--)
{
m_emptySlots.Push(i);
m_slots[i] = null;
}
}
// Once zmq_term() was called, we can't create new sockets.
if (m_terminating)
{
throw TerminatingException.Create();
}
// If max_sockets limit was reached, return error.
if (m_emptySlots.Count == 0)
{
throw NetMQException.Create(ErrorCode.EMFILE);
}
// Choose a slot for the socket.
int slot = m_emptySlots.Pop();
// Generate new unique socket ID.
int sid = Interlocked.Increment(ref s_maxSocketId);
// Create the socket and register its mailbox.
s = SocketBase.Create(type, this, slot, sid);
if (s == null)
{
m_emptySlots.Push(slot);
return(null);
}
m_sockets.Add(s);
m_slots[slot] = s.Mailbox;
//LOG.debug("NEW Slot [" + slot + "] " + s);
}
return(s);
}
public Msg Recv(SendReceiveOptions flags)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
Msg msg;
// Get the message.
bool isMessageAvailable = XRecv(flags, out msg);
// Once every inbound_poll_rate messages check for signals and process
// incoming commands. This happens only if we are not polling altogether
// because there are messages available all the time. If poll occurs,
// ticks is set to zero and thus we avoid this code.
//
// Note that 'recv' uses different command throttling algorithm (the one
// described above) from the one used by 'send'. This is because counting
// ticks is more efficient than doing RDTSC all the time.
if (++m_ticks == Config.InboundPollRate)
{
ProcessCommands(0, false);
m_ticks = 0;
}
// If we have the message, return immediately.
if (isMessageAvailable && msg != null)
{
ExtractFlags(msg);
return(msg);
}
// If the message cannot be fetched immediately, there are two scenarios.
// For non-blocking recv, commands are processed in case there's an
// activate_reader command already waiting int a command pipe.
// If it's not, return EAGAIN.
if ((flags & SendReceiveOptions.DontWait) > 0 || m_options.ReceiveTimeout == 0)
{
ProcessCommands(0, false);
m_ticks = 0;
isMessageAvailable = XRecv(flags, out msg);
if (!isMessageAvailable)
{
throw AgainException.Create();
}
else if (msg == null)
{
return(null);
}
ExtractFlags(msg);
return(msg);
}
// Compute the time when the timeout should occur.
// If the timeout is infite, don't care.
int timeout = m_options.ReceiveTimeout;
long end = timeout < 0 ? 0 : (Clock.NowMs() + timeout);
// In blocking scenario, commands are processed over and over again until
// we are able to fetch a message.
bool block = (m_ticks != 0);
while (true)
{
ProcessCommands(block ? timeout : 0, false);
isMessageAvailable = XRecv(flags, out msg);
if (isMessageAvailable && msg != null)
{
m_ticks = 0;
break;
}
block = true;
if (timeout > 0)
{
timeout = (int)(end - Clock.NowMs());
if (timeout <= 0)
{
throw AgainException.Create();
}
}
}
ExtractFlags(msg);
return(msg);
}
public void Send(Msg msg, SendReceiveOptions flags)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
// Check whether message passed to the function is valid.
if (msg == null)
{
throw NetMQException.Create(ErrorCode.EFAULT);
}
// Process pending commands, if any.
ProcessCommands(0, true);
// Clear any user-visible flags that are set on the message.
msg.ResetFlags(MsgFlags.More);
// At this point we impose the flags on the message.
if ((flags & SendReceiveOptions.SendMore) > 0)
{
msg.SetFlags(MsgFlags.More);
}
// Try to send the message.
bool isMessageSent = XSend(msg, flags);
if (isMessageSent)
{
return;
}
// In case of non-blocking send we'll simply propagate
// the error - including EAGAIN - up the stack.
if ((flags & SendReceiveOptions.DontWait) > 0 || m_options.SendTimeout == 0)
{
throw AgainException.Create();
}
// Compute the time when the timeout should occur.
// If the timeout is infite, don't care.
int timeout = m_options.SendTimeout;
long end = timeout < 0 ? 0 : (Clock.NowMs() + timeout);
// Oops, we couldn't send the message. Wait for the next
// command, process it and try to send the message again.
// If timeout is reached in the meantime, return EAGAIN.
while (true)
{
ProcessCommands(timeout, false);
isMessageSent = XSend(msg, flags);
if (isMessageSent)
{
break;
}
if (timeout > 0)
{
timeout = (int)(end - Clock.NowMs());
if (timeout <= 0)
{
throw AgainException.Create();
}
}
}
}
public void Connect(String addr)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
// Process pending commands, if any.
ProcessCommands(0, false);
string address;
string protocol;
DecodeAddress(addr, out address, out protocol);
CheckProtocol(protocol);
if (protocol.Equals("inproc"))
{
// TODO: inproc connect is specific with respect to creating pipes
// as there's no 'reconnect' functionality implemented. Once that
// is in place we should follow generic pipe creation algorithm.
// Find the peer endpoint.
Ctx.Endpoint peer = FindEndpoint(addr);
// The total HWM for an inproc connection should be the sum of
// the binder's HWM and the connector's HWM.
int sndhwm;
int rcvhwm;
if (m_options.SendHighWatermark == 0 || peer.Options.ReceiveHighWatermark == 0)
{
sndhwm = 0;
}
else
{
sndhwm = m_options.SendHighWatermark + peer.Options.ReceiveHighWatermark;
}
if (m_options.ReceiveHighWatermark == 0 || peer.Options.SendHighWatermark == 0)
{
rcvhwm = 0;
}
else
{
rcvhwm = m_options.ReceiveHighWatermark + peer.Options.SendHighWatermark;
}
// Create a bi-directional pipe to connect the peers.
ZObject[] parents = { this, peer.Socket };
int[] hwms = { sndhwm, rcvhwm };
bool[] delays = { m_options.DelayOnDisconnect, m_options.DelayOnClose };
Pipe[] pipes = Pipe.PipePair(parents, hwms, delays);
// Attach local end of the pipe to this socket object.
AttachPipe(pipes[0]);
// If required, send the identity of the peer to the local socket.
if (peer.Options.RecvIdentity)
{
Msg id = new Msg(peer.Options.IdentitySize);
id.Put(peer.Options.Identity, 0, peer.Options.IdentitySize);
id.SetFlags(MsgFlags.Identity);
bool written = pipes[0].Write(id);
Debug.Assert(written);
pipes[0].Flush();
}
// If required, send the identity of the local socket to the peer.
if (m_options.RecvIdentity)
{
Msg id = new Msg(m_options.IdentitySize);
id.Put(m_options.Identity, 0, m_options.IdentitySize);
id.SetFlags(MsgFlags.Identity);
bool written = pipes[1].Write(id);
Debug.Assert(written);
pipes[1].Flush();
}
// Attach remote end of the pipe to the peer socket. Note that peer's
// seqnum was incremented in find_endpoint function. We don't need it
// increased here.
SendBind(peer.Socket, pipes[1], false);
// Save last endpoint URI
m_options.LastEndpoint = addr;
return;
}
// Choose the I/O thread to run the session in.
IOThread ioThread = ChooseIOThread(m_options.Affinity);
if (ioThread == null)
{
throw NetMQException.Create("Empty IO Thread", ErrorCode.EMTHREAD);
}
Address paddr = new Address(protocol, address);
// Resolve address (if needed by the protocol)
if (protocol.Equals("tcp"))
{
paddr.Resolved = (new TcpAddress());
paddr.Resolved.Resolve(
address, m_options.IPv4Only);
}
else if (protocol.Equals("Ipc"))
{
paddr.Resolved = (new IpcAddress());
paddr.Resolved.Resolve(address, true);
}
else if (protocol.Equals("pgm") || protocol.Equals("epgm"))
{
if (m_options.SocketType == ZmqSocketType.Sub || m_options.SocketType == ZmqSocketType.Xsub)
{
Bind(addr);
return;
}
paddr.Resolved = new PgmAddress();
paddr.Resolved.Resolve(address, m_options.IPv4Only);
}
// Create session.
SessionBase session = SessionBase.Create(ioThread, true, this, m_options, paddr);
Debug.Assert(session != null);
// PGM does not support subscription forwarding; ask for all data to be
// sent to this pipe.
bool icanhasall = protocol.Equals("pgm") || protocol.Equals("epgm");
if (!m_options.DelayAttachOnConnect || icanhasall)
{
// Create a bi-directional pipe.
ZObject[] parents = { this, session };
int[] hwms = { m_options.SendHighWatermark, m_options.ReceiveHighWatermark };
bool[] delays = { m_options.DelayOnDisconnect, m_options.DelayOnClose };
Pipe[] pipes = Pipe.PipePair(parents, hwms, delays);
// Attach local end of the pipe to the socket object.
AttachPipe(pipes[0], icanhasall);
// Attach remote end of the pipe to the session object later on.
session.AttachPipe(pipes[1]);
}
// Save last endpoint URI
m_options.LastEndpoint = paddr.ToString();
AddEndpoint(addr, session);
return;
}
public void Bind(String addr)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
// Process pending commands, if any.
ProcessCommands(0, false);
string protocol;
string address;
DecodeAddress(addr, out address, out protocol);
CheckProtocol(protocol);
if (protocol.Equals("inproc"))
{
Ctx.Endpoint endpoint = new Ctx.Endpoint(this, m_options);
RegisterEndpoint(addr, endpoint);
// Save last endpoint URI
m_options.LastEndpoint = addr;
return;
}
if ((protocol.Equals("pgm") || protocol.Equals("epgm")) && (
m_options.SocketType == ZmqSocketType.Pub || m_options.SocketType == ZmqSocketType.Xpub))
{
// For convenience's sake, bind can be used interchageable with
// connect for PGM and EPGM transports.
Connect(addr);
return;
}
// Remaining trasnports require to be run in an I/O thread, so at this
// point we'll choose one.
IOThread ioThread = ChooseIOThread(m_options.Affinity);
if (ioThread == null)
{
throw NetMQException.Create(ErrorCode.EMTHREAD);
}
if (protocol.Equals("tcp"))
{
TcpListener listener = new TcpListener(
ioThread, this, m_options);
try
{
listener.SetAddress(address);
}
catch (NetMQException ex)
{
listener.Destroy();
EventBindFailed(addr, ex.ErrorCode);
throw;
}
// Save last endpoint URI
m_options.LastEndpoint = listener.Address;
AddEndpoint(addr, listener);
return;
}
if (protocol.Equals("pgm") || protocol.Equals("epgm"))
{
PgmListener listener = new PgmListener(ioThread, this, m_options);
try
{
listener.Init(address);
}
catch (NetMQException ex)
{
listener.Destroy();
EventBindFailed(addr, ex.ErrorCode);
throw;
}
m_options.LastEndpoint = addr;
AddEndpoint(addr, listener);
return;
}
if (protocol.Equals("ipc"))
{
IpcListener listener = new IpcListener(
ioThread, this, m_options);
try
{
listener.SetAddress(address);
}
catch (NetMQException ex)
{
listener.Destroy();
EventBindFailed(addr, ex.ErrorCode);
throw;
}
// Save last endpoint URI
m_options.LastEndpoint = listener.Address;
AddEndpoint(addr, listener);
return;
}
Debug.Assert(false);
throw NetMQException.Create(ErrorCode.EFAULT);
}
public void TermEndpoint(String addr)
{
if (m_ctxTerminated)
{
throw TerminatingException.Create();
}
// Check whether endpoint address passed to the function is valid.
if (addr == null)
{
throw InvalidException.Create();
}
// Process pending commands, if any, since there could be pending unprocessed process_own()'s
// (from launch_child() for example) we're asked to terminate now.
ProcessCommands(0, false);
string protocol;
string address;
DecodeAddress(addr, out address, out protocol);
CheckProtocol(protocol);
if (protocol == Address.InProcProtocol)
{
try
{
UnregisterEndpoint(addr, this);
return;
}
catch (NetMQException ex)
{
if (ex.ErrorCode != ErrorCode.ENOENT)
{
throw;
}
}
Pipe pipe;
if (m_inprocs.TryGetValue(addr, out pipe))
{
pipe.Terminate(true);
m_inprocs.Remove(addr);
}
else
{
throw NetMQException.Create(ErrorCode.ENOENT);
}
}
else
{
Own endpoint;
if (m_endpoints.TryGetValue(addr, out endpoint))
{
TermChild(endpoint);
m_endpoints.Remove(addr);
}
else
{
throw NetMQException.Create(ErrorCode.ENOENT);
}
}
}