public NetMQScheduler(NetMQContext context, Poller poller = null)
{
m_context = context;
if (poller == null)
{
m_ownPoller = true;
m_poller = new Poller();
}
else
{
m_ownPoller = false;
m_poller = poller;
}
m_clientSockets = new ConcurrentBag <NetMQSocket>();
m_schedulerId = Interlocked.Increment(ref s_schedulerCounter);
m_address = string.Format("{0}://scheduler-{1}", NetMQ.zmq.Address.InProcProtocol, m_schedulerId);
m_serverSocket = context.CreatePullSocket();
m_serverSocket.Options.Linger = TimeSpan.Zero;
m_serverSocket.Bind(m_address);
m_currentMessageHandler = OnMessageFirstTime;
m_serverSocket.ReceiveReady += m_currentMessageHandler;
m_poller.AddSocket(m_serverSocket);
m_clientSocket = new ThreadLocal <NetMQSocket>(() =>
{
var socket = m_context.CreatePushSocket();
socket.Connect(m_address);
m_clientSockets.Add(socket);
return(socket);
});
m_schedulerThread = new ThreadLocal <bool>(() => false);
if (m_ownPoller)
{
Task.Factory.StartNew(m_poller.Start, TaskCreationOptions.LongRunning);
}
}
public static Task <(string, bool)> ReceiveFrameStringAsync(
[NotNull] this NetMQSocket socket,
[NotNull] Encoding encoding,
CancellationToken cancellationToken = default(CancellationToken))
{
if (NetMQRuntime.Current == null)
{
throw new InvalidOperationException("NetMQRuntime must be created before calling async functions");
}
socket.AttachToRuntime();
var msg = new Msg();
msg.InitEmpty();
if (socket.TryReceive(ref msg, TimeSpan.Zero))
{
var str = msg.Size > 0
? encoding.GetString(msg.Data, msg.Offset, msg.Size)
: string.Empty;
msg.Close();
return(Task.FromResult((str, msg.HasMore)));
}
TaskCompletionSource <(string, bool)> source = new TaskCompletionSource <(string, bool)>();
cancellationToken.Register(() => source.SetCanceled());
void Listener(object sender, NetMQSocketEventArgs args)
{
if (socket.TryReceive(ref msg, TimeSpan.Zero))
{
var str = msg.Size > 0
? encoding.GetString(msg.Data, msg.Offset, msg.Size)
: string.Empty;
bool more = msg.HasMore;
msg.Close();
socket.ReceiveReady -= Listener;
source.SetResult((str, more));
}
}
socket.ReceiveReady += Listener;
return(source.Task);
}
public void RunPipeline(Sockets.PairSocket shim)
{
m_pipe = shim;
shim.SignalOK();
while (!m_terminated)
{
PollItem[] pollItems = new PollItem[]
{
new PollItem(m_pipe.SocketHandle, PollEvents.PollIn),
new PollItem(m_udpSocket, PollEvents.PollIn),
};
long timeout = -1;
if (m_transmit != null)
{
timeout = m_pingAt - Clock.NowMs();
if (timeout < 0)
{
timeout = 0;
}
}
ZMQ.Poll(pollItems, m_udpSocket != null ? 2 : 1, (int)timeout);
if (pollItems[0].ResultEvent.HasFlag(PollEvents.PollIn))
{
HandlePipe();
}
if (pollItems[1].ResultEvent.HasFlag(PollEvents.PollIn))
{
HandleUdp();
}
if (m_transmit != null && Clock.NowMs() > m_pingAt)
{
SendUdpFrame(m_transmit);
m_pingAt = Clock.NowMs() + m_interval;
}
}
m_udpSocket.Dispose();
}
public void RemoveSocket(NetMQSocket socket)
{
if (socket == null)
{
throw new ArgumentNullException("stock");
}
if (m_disposed)
{
throw new ObjectDisposedException("Poller is disposed");
}
socket.EventsChanged -= OnSocketEventsChanged;
m_sockets.Remove(socket);
m_isDirty = true;
}
/// <summary>
/// Receive a single frame from <paramref name="socket"/>, asynchronously.
/// </summary>
/// <param name="socket">The socket to receive from.</param>
/// <param name="cancellationToken">The token used to propagate notification that this operation should be canceled.</param>
/// <returns>The content of the received message frame and boolean indicate if another frame of the same message follows.</returns>
public static Task <(byte[], bool)> ReceiveFrameBytesAsync(
this NetMQSocket socket,
CancellationToken cancellationToken = default(CancellationToken)
)
{
if (NetMQRuntime.Current == null)
{
throw new InvalidOperationException("NetMQRuntime must be created before calling async functions");
}
socket.AttachToRuntime();
var msg = new Msg();
msg.InitEmpty();
if (socket.TryReceive(ref msg, TimeSpan.Zero))
{
var data = msg.CloneData();
bool more = msg.HasMore;
msg.Close();
return(Task.FromResult((data, more)));
}
TaskCompletionSource <(byte[], bool)> source = new TaskCompletionSource <(byte[], bool)>();
cancellationToken.Register(() => source.SetCanceled());
void Listener(object sender, NetMQSocketEventArgs args)
{
if (socket.TryReceive(ref msg, TimeSpan.Zero))
{
var data = msg.CloneData();
bool more = msg.HasMore;
msg.Close();
socket.ReceiveReady -= Listener;
source.SetResult((data, more));
}
}
socket.ReceiveReady += Listener;
return(source.Task);
}
/// <summary>
/// Create a new instance of a Proxy (NetMQ.Proxy)
/// with the given sockets to serve as a front-end, a back-end, and a control socket.
/// </summary>
/// <param name="frontend">the socket that messages will be forwarded from</param>
/// <param name="backend">the socket that messages will be forwarded to</param>
/// <param name="control">this socket will have messages also sent to it - you can set this to null if not needed</param>
/// <param name="poller">an optional external poller to use within this proxy</param>
/// <exception cref="InvalidOperationException"><paramref name="poller"/> is not <c>null</c> and either <paramref name="frontend"/> or <paramref name="backend"/> are not contained within it.</exception>
public Proxy([NotNull] NetMQSocket frontend, [NotNull] NetMQSocket backend, [CanBeNull] NetMQSocket control = null, Poller poller = null)
{
if (poller != null)
{
if (!poller.ContainsSocket(backend) || !poller.ContainsSocket(frontend))
{
throw new InvalidOperationException("When using an external poller, both the frontend and backend sockets must be added to it.");
}
m_externalPoller = true;
m_poller = poller;
}
m_frontend = frontend;
m_backend = backend;
m_control = control;
}
public static Task SendFrameAsync(
this NetMQSocket socket,
byte[] data,
bool more = false,
CancellationToken cancellationToken = default(CancellationToken)
)
{
if (NetMQRuntime.Current == null)
{
throw new InvalidOperationException("NetMQRuntime must be created before calling async functions");
}
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
socket.AttachToRuntime();
if (socket.TrySendFrame(TimeSpan.Zero, data, more))
{
return(Task.CompletedTask);
}
TaskCompletionSource <object> source = new TaskCompletionSource <object>();
cancellationToken.Register(() =>
{
socket.SendReady -= Listener;
source.TrySetCanceled();
});
void Listener(object sender, NetMQSocketEventArgs args)
{
if (socket.TrySendFrame(TimeSpan.Zero, data, more))
{
socket.SendReady -= Listener;
source.TrySetResult(null);
}
}
socket.SendReady += Listener;
return(source.Task);
}
public NetMQScheduler(NetMQContext context, Poller poller = null)
{
m_context = context;
if (poller == null)
{
m_ownPoller = true;
m_poller = new Poller();
}
else
{
m_ownPoller = false;
m_poller = poller;
}
m_tasksQueue = new ConcurrentQueue <Task>();
m_syncObject = new object();
m_schedulerId = Interlocked.Increment(ref s_schedulerCounter);
m_address = string.Format("{0}://scheduler-{1}", NetMQ.zmq.Address.InProcProtocol, m_schedulerId);
m_serverSocket = context.CreatePullSocket();
m_serverSocket.Options.Linger = TimeSpan.Zero;
m_serverSocket.Bind(m_address);
m_currentMessageHandler = OnMessageFirstTime;
m_serverSocket.ReceiveReady += m_currentMessageHandler;
m_poller.AddSocket(m_serverSocket);
m_clientSocket = m_context.CreatePushSocket();
m_clientSocket.Connect(m_address);
m_schedulerThread = new ThreadLocal <bool>(() => false);
if (m_ownPoller)
{
m_poller.PollTillCancelledNonBlocking();
}
}
/// <summary>
/// Receive a single frame from <paramref name="socket"/>, asynchronously.
/// </summary>
/// <param name="socket">The socket to receive from.</param>
/// <param name="expectedFrameCount">Specifies the initial capacity of the <see cref="List{T}"/> used
/// to buffer results. If the number of frames is known, set it here. If more frames arrive than expected,
/// an extra allocation will occur, but the result will still be correct.</param>
/// <param name="cancellationToken">The token used to propagate notification that this operation should be canceled.</param>
/// <returns>The content of the received message.</returns>
public static async Task <NetMQMessage> ReceiveMultipartMessageAsync(
this NetMQSocket socket,
int expectedFrameCount = 4,
CancellationToken cancellationToken = default(CancellationToken))
{
var message = new NetMQMessage(expectedFrameCount);
while (true)
{
(byte[] bytes, bool more) = await socket.ReceiveFrameBytesAsync(cancellationToken);
message.Append(bytes);
if (!more)
{
break;
}
}
return(message);
}
public void Run(PairSocket shim)
{
m_pipe = shim;
shim.SignalOK();
m_pipe.ReceiveReady += OnPipeReady;
m_pingTimer = new NetMQTimer(interval: TimeSpan.Zero);
m_pingTimer.Elapsed += PingElapsed;
m_pingTimer.Enable = false;
m_poller = new NetMQPoller {
m_pipe, m_pingTimer
};
m_poller.Run();
// the beacon might never been configured
m_udpSocket?.Close();
}
public static NetMQMessage ReceiveMessage(this NetMQSocket socket, TimeSpan timeout)
{
var item = new PollItem(socket.SocketHandle, PollEvents.PollIn);
var items = new[] { item };
ZMQ.Poll(items, (int)timeout.TotalMilliseconds);
if (item.ResultEvent.HasFlag(PollEvents.PollError) && !socket.IgnoreErrors)
{
throw new ErrorPollingException("Error while polling", socket);
}
if (!item.ResultEvent.HasFlag(PollEvents.PollIn))
{
return(null);
}
var msg = socket.ReceiveMessage();
return(msg);
}
/// <summary>
/// Receive a single frame from <paramref name="socket"/>, asynchronously, then ignore its content.
/// </summary>
/// <param name="socket">The socket to receive from.</param>
/// <returns>Boolean indicate if another frame of the same message follows</returns>
public static Task <bool> SkipFrameAsync([NotNull] this NetMQSocket socket)
{
if (NetMQRuntime.Current == null)
{
throw new InvalidOperationException("NetMQRuntime must be created before calling async functions");
}
socket.AttachToRuntime();
var msg = new Msg();
msg.InitEmpty();
if (socket.TryReceive(ref msg, TimeSpan.Zero))
{
bool more = msg.HasMore;
msg.Close();
return(more ? s_trueTask : s_falseTask);
}
TaskCompletionSource <bool> source = new TaskCompletionSource <bool>();
void Listener(object sender, NetMQSocketEventArgs args)
{
if (socket.TryReceive(ref msg, TimeSpan.Zero))
{
bool more = msg.HasMore;
msg.Close();
socket.ReceiveReady -= Listener;
source.SetResult(more);
}
}
socket.ReceiveReady += Listener;
return(source.Task);
}
public void AddSocket(NetMQSocket socket)
{
if (socket == null)
{
throw new ArgumentNullException("stock");
}
if (m_sockets.Contains(socket))
{
throw new ArgumentException("Socket already added to poller");
}
if (m_disposed)
{
throw new ObjectDisposedException("Poller is disposed");
}
m_sockets.Add(socket);
socket.EventsChanged += OnSocketEventsChanged;
m_isDirty = true;
}
private NetMQScheduler(Poller poller, PushSocket pushSocket, PullSocket pullSocket)
{
if (poller == null)
{
m_ownPoller = true;
m_poller = new Poller();
}
else
{
m_ownPoller = false;
m_poller = poller;
}
var address = string.Format("{0}://scheduler-{1}",
Address.InProcProtocol,
Interlocked.Increment(ref s_schedulerCounter));
m_serverSocket = pullSocket;
m_serverSocket.Options.Linger = TimeSpan.Zero;
m_serverSocket.Bind(address);
m_currentMessageHandler = OnMessageFirstTime;
m_serverSocket.ReceiveReady += m_currentMessageHandler;
m_poller.AddSocket(m_serverSocket);
m_clientSocket = pushSocket;
m_clientSocket.Connect(address);
m_isSchedulerThread = new ThreadLocal <bool>(() => false);
if (m_ownPoller)
{
m_poller.PollTillCancelledNonBlocking();
}
}
public void Run(PairSocket shim)
{
m_pipe = shim;
shim.SignalOK();
m_pipe.ReceiveReady += OnPipeReady;
m_pingTimer = new NetMQTimer(0);
m_pingTimer.Elapsed += PingElapsed;
m_pingTimer.Enable = false;
m_poller = new Poller();
m_poller.AddSocket(m_pipe);
m_poller.AddTimer(m_pingTimer);
m_poller.PollTillCancelled();
// the beacon might never been configured
if (m_udpSocket != null)
{
m_udpSocket.Close();
}
}
/// <summary>
/// Runs the poller on the caller's thread. Only returns when <see cref="Stop"/> or <see cref="StopAsync"/> are called from another thread.
/// </summary>
private void RunPoller()
{
try
{
// Recalculate all timers now
foreach (var timer in m_timers)
{
if (timer.Enable)
{
timer.When = Clock.NowMs() + timer.Interval;
}
}
// Run until stop is requested
while (!m_stopSignaler.IsStopRequested)
{
if (m_isPollSetDirty)
{
RebuildPollset();
}
var pollStart = Clock.NowMs();
// Set tickless to "infinity"
long tickless = pollStart + int.MaxValue;
// Find the When-value of the earliest timer..
foreach (var timer in m_timers)
{
// If it is enabled but no When is set yet,
if (timer.When == -1 && timer.Enable)
{
// Set this timer's When to now plus it's Interval.
timer.When = pollStart + timer.Interval;
}
// If it has a When and that is earlier than the earliest found thus far,
if (timer.When != -1 && tickless > timer.When)
{
// save that value.
tickless = timer.When;
}
}
// Compute a timeout value - how many milliseconds from now that the earliest-timer will expire.
var timeout = tickless - pollStart;
// Use zero to indicate it has already expired.
if (timeout < 0)
{
timeout = 0;
}
var isItemAvailable = false;
if (m_pollSet.Length != 0)
{
isItemAvailable = m_netMqSelector.Select(m_pollSet, m_pollSet.Length, timeout);
}
else if (timeout > 0)
{
//TODO: Do we really want to simply sleep and return, doing nothing during this interval?
//TODO: Should a large value be passed it will sleep for a month literally.
// Solution should be different, but sleep is more natural here than in selector (timers are not selector concern).
Debug.Assert(timeout <= int.MaxValue);
Thread.Sleep((int)timeout);
}
// Get the expected end time in case we time out. This looks redundant but, unfortunately,
// it happens that Poll takes slightly less than the requested time and 'Clock.NowMs() >= timer.When'
// may not true, even if it is supposed to be. In other words, even when Poll times out, it happens
// that 'Clock.NowMs() < pollStart + timeout'
var expectedPollEnd = !isItemAvailable ? pollStart + timeout : -1L;
// that way we make sure we can continue the loop if new timers are added.
// timers cannot be removed
foreach (var timer in m_timers)
{
if ((Clock.NowMs() >= timer.When || expectedPollEnd >= timer.When) && timer.When != -1)
{
timer.InvokeElapsed(this);
if (timer.Enable)
{
timer.When = Clock.NowMs() + timer.Interval;
}
}
}
for (var i = 0; i < m_pollSet.Length; i++)
{
NetMQSelector.Item item = m_pollSet[i];
if (item.Socket != null)
{
NetMQSocket socket = m_pollact[i];
if (item.ResultEvent.HasError())
{
if (++socket.Errors > 1)
{
Remove(socket);
item.ResultEvent = PollEvents.None;
}
}
else
{
socket.Errors = 0;
}
if (item.ResultEvent != PollEvents.None)
{
socket.InvokeEvents(this, item.ResultEvent);
}
}
else if (item.ResultEvent.HasError() || item.ResultEvent.HasIn())
{
if (m_pollinSockets.TryGetValue(item.FileDescriptor, out Action <Socket> action))
{
action(item.FileDescriptor);
}
}
}
}
#if !NET35
// Try to dequeue and execute all pending tasks before stopping poller
while (m_tasksQueue.TryDequeue(out Task task, TimeSpan.Zero))
{
TryExecuteTask(task);
}
#endif
}
finally
{
foreach (var socket in m_sockets.ToList())
{
Remove(socket);
}
}
}
/// <summary>
/// Poll as long as the given Func evaluates to true.
/// </summary>
/// <param name="condition">a Func that returns a boolean value, to evaluate on each poll-iteration to decide when to exit the loop</param>
/// <exception cref="ObjectDisposedException">This poller must not have already been disposed.</exception>
/// <exception cref="InvalidOperationException">This poller must not have already been started.</exception>
private void PollWhile([NotNull, InstantHandle] Func <bool> condition)
{
if (m_disposed)
{
throw new ObjectDisposedException("Poller is disposed");
}
if (m_isStarted)
{
throw new InvalidOperationException("Poller is started");
}
if (Thread.CurrentThread.Name == null)
{
Thread.CurrentThread.Name = "NetMQPollerThread";
}
m_isStoppedEvent.Reset();
m_isStarted = true;
try
{
// the sockets may have been created in another thread, to make sure we can fully use them we do full memory barrier
// at the beginning of the loop
Thread.MemoryBarrier();
// Recalculate all timers now
foreach (var timer in m_timers)
{
if (timer.Enable)
{
timer.When = Clock.NowMs() + timer.Interval;
}
}
// Do this until the given Func evaluates to false...
while (condition())
{
if (m_isDirty)
{
RebuildPollset();
}
var pollStart = Clock.NowMs();
var timeout = TicklessTimer();
var isItemsAvailable = false;
if (m_pollSize > 0)
{
isItemsAvailable = m_selector.Select(m_pollset, m_pollSize, timeout);
}
else
{
// Don't pass anything less than 0 to sleep or risk an out of range exception or worse - infinity. Do not sleep on 0 from orginal code.
if (timeout > 0)
{
//TODO: Do we really want to simply sleep and return, doing nothing during this interval?
//TODO: Should a large value be passed it will sleep for a month literaly.
// Solution should be different, but sleep is more natural here than in selector (timers are not selector concern).
Thread.Sleep(timeout);
}
}
// Get the expected end time in case we time out. This looks redundant but, unfortunately,
// it happens that Poll takes slightly less than the requested time and 'Clock.NowMs() >= timer.When'
// may not true, even if it is supposed to be. In other words, even when Poll times out, it happens
// that 'Clock.NowMs() < pollStart + timeout'
var expectedPollEnd = !isItemsAvailable ? pollStart + timeout : -1;
// that way we make sure we can continue the loop if new timers are added.
// timers cannot be removed
int timersCount = m_timers.Count;
for (int i = 0; i < timersCount; i++)
{
var timer = m_timers[i];
if ((Clock.NowMs() >= timer.When || expectedPollEnd >= timer.When) && timer.When != -1)
{
timer.InvokeElapsed(this);
if (timer.Enable)
{
timer.When = timer.Interval + Clock.NowMs();
}
}
}
for (int itemNbr = 0; itemNbr < m_pollSize; itemNbr++)
{
SelectItem item = m_pollset[itemNbr];
if (item.Socket != null)
{
NetMQSocket socket = m_pollact[itemNbr];
if (item.ResultEvent.HasError())
{
socket.Errors++;
if (socket.Errors > 1)
{
RemoveSocket(socket);
item.ResultEvent = PollEvents.None;
}
}
else
{
socket.Errors = 0;
}
if (item.ResultEvent != PollEvents.None)
{
socket.InvokeEvents(this, item.ResultEvent);
}
}
else
{
if (item.ResultEvent.HasError() || item.ResultEvent.HasIn())
{
Action <Socket> action;
if (m_pollinSockets.TryGetValue(item.FileDescriptor, out action))
{
action(item.FileDescriptor);
}
}
}
}
if (m_zombies.Count > 0)
{
// Now handle any timer zombies
// This is going to be slow if we have many zombies
foreach (var netMQTimer in m_zombies)
{
m_timers.Remove(netMQTimer);
}
m_zombies.Clear();
}
}
}
finally
{
try
{
foreach (var socket in m_sockets.ToList())
{
RemoveSocket(socket);
}
}
finally
{
m_isStarted = false;
m_isStoppedEvent.Set();
}
}
}
public void Add(NetMQSocket socket)
{
m_poller.Add(socket);
m_sockets.Add(socket);
}
public void Remove(NetMQSocket socket)
{
m_poller.Remove(socket);
m_sockets.Remove(socket);
}
/// <summary>
/// Create a new instance of a Proxy (NetMQ.Proxy)
/// with the given sockets to serve as a front-end, a back-end, and a control socket.
/// </summary>
/// <param name="frontend">the socket that messages will be forwarded from</param>
/// <param name="backend">the socket that messages will be forwarded to</param>
/// <param name="controlIn">this socket will have incoming messages also sent to it - you can set this to null if not needed</param>
/// <param name="controlOut">this socket will have outgoing messages also sent to it - you can set this to null if not needed</param>
/// <param name="poller">an optional external poller to use within this proxy</param>
public Proxy([NotNull] NetMQSocket frontend, [NotNull] NetMQSocket backend, [CanBeNull] NetMQSocket controlIn, [CanBeNull] NetMQSocket controlOut, [CanBeNull] INetMQPoller poller = null)
{
if (poller != null)
{
m_externalPoller = true;
m_poller = poller;
}
m_frontend = frontend;
m_backend = backend;
m_controlIn = controlIn;
m_controlOut = controlOut ?? controlIn;
}
/// <summary>
/// Create a new instance of a Proxy (NetMQ.Proxy)
/// with the given sockets to serve as a front-end, a back-end, and a control socket.
/// </summary>
/// <param name="frontend">the socket that messages will be forwarded from</param>
/// <param name="backend">the socket that messages will be forwarded to</param>
/// <param name="control">this socket will have messages also sent to it - you can set this to null if not needed</param>
/// <param name="poller">an optional external poller to use within this proxy</param>
/// <exception cref="InvalidOperationException"><paramref name="poller"/> is not <c>null</c> and either <paramref name="frontend"/> or <paramref name="backend"/> are not contained within it.</exception>
public Proxy([NotNull] NetMQSocket frontend, [NotNull] NetMQSocket backend, [CanBeNull] NetMQSocket control = null, [CanBeNull] INetMQPoller poller = null)
: this(frontend, backend, control, null, poller)
{
}
public SocketOptions([NotNull] NetMQSocket socket)
{
m_socket = socket;
}
/// <summary>
/// Create a new SocketOptions that references the given NetMQSocket.
/// </summary>
/// <param name="socket">the NetMQSocket for this SocketOptions to hold a reference to</param>
public SocketOptions(NetMQSocket socket)
{
m_socket = socket;
}
/// <summary>
/// Create a new NetMQSocketEventArgs referencing the given socket.
/// </summary>
/// <param name="socket">the NetMQSocket that this is about</param>
public NetMQSocketEventArgs([NotNull] NetMQSocket socket)
{
Socket = socket;
}
public Proxy(NetMQSocket frontend, NetMQSocket backend, NetMQSocket control)
{
m_frontend = frontend;
m_backend = backend;
m_control = control;
}
internal static Context CreateContext(Model.IUser user, Header header, Model.Model dbContext, NetMQ.NetMQSocket socket)
{
return(new Context()
{
Header = header,
User = user,
Socket = socket,
DbContext = dbContext
});
}
private void PollWhile(Func <bool> condition)
{
if (m_disposed)
{
throw new ObjectDisposedException("Poller is disposed");
}
if (m_isStarted)
{
throw new InvalidOperationException("Poller is started");
}
if (Thread.CurrentThread.Name == null)
{
Thread.CurrentThread.Name = "NetMQPollerThread";
}
m_isStoppedEvent.Reset();
m_isStarted = true;
try
{
// the sockets may have been created in another thread, to make sure we can fully use them we do full memory barried
// at the begining of the loop
Thread.MemoryBarrier();
// Recalculate all timers now
foreach (NetMQTimer netMQTimer in m_timers)
{
if (netMQTimer.Enable)
{
netMQTimer.When = Clock.NowMs() + netMQTimer.Interval;
}
}
while (condition())
{
if (m_isDirty)
{
RebuildPollset();
}
var pollStart = Clock.NowMs();
var timeout = TicklessTimer();
var nbEvents = ZMQ.Poll(m_pollset, m_pollSize, timeout);
// Get the expected end time in case we time out. This looks redundant but, unfortunately,
// it happens that Poll takes slightly less than the requested time and 'Clock.NowMs() >= timer.When'
// may not true, even if it is supposed to be. In other words, even when Poll times out, it happens
// that 'Clock.NowMs() < pollStart + timeout'
var expectedPollEnd = nbEvents == 0 ? pollStart + timeout : -1;
// that way we make sure we can continue the loop if new timers are added.
// timers cannot be removed
int timersCount = m_timers.Count;
for (int i = 0; i < timersCount; i++)
{
var timer = m_timers[i];
if ((Clock.NowMs() >= timer.When || expectedPollEnd >= timer.When) && timer.When != -1)
{
timer.InvokeElapsed(this);
if (timer.Enable)
{
timer.When = timer.Interval + Clock.NowMs();
}
}
}
for (int itemNbr = 0; itemNbr < m_pollSize; itemNbr++)
{
PollItem item = m_pollset[itemNbr];
if (item.Socket != null)
{
NetMQSocket socket = m_pollact[itemNbr] as NetMQSocket;
if (item.ResultEvent.HasFlag(PollEvents.PollError) && !socket.IgnoreErrors)
{
socket.Errors++;
if (socket.Errors > 1)
{
RemoveSocket(socket);
item.ResultEvent = PollEvents.None;
}
}
else
{
socket.Errors = 0;
}
if (item.ResultEvent != PollEvents.None)
{
socket.InvokeEvents(this, item.ResultEvent);
}
}
else
{
if (item.ResultEvent.HasFlag(PollEvents.PollError) || item.ResultEvent.HasFlag(PollEvents.PollIn))
{
Action <Socket> action;
if (m_pollinSockets.TryGetValue(item.FileDescriptor, out action))
{
action(item.FileDescriptor);
}
}
}
}
if (m_zombies.Any())
{
// Now handle any timer zombies
// This is going to be slow if we have many zombies
foreach (NetMQTimer netMQTimer in m_zombies)
{
m_timers.Remove(netMQTimer);
}
m_zombies.Clear();
}
}
}
finally
{
m_isStoppedEvent.Set();
foreach (var socket in m_sockets.ToList())
{
RemoveSocket(socket);
}
}
}
/// <summary>
/// Create a new ErrorPollingException containing the given message and a reference to the given socket.
/// </summary>
/// <param name="message">the textual description of what gave rise to this exception, to be exposed as the Message property</param>
/// <param name="socket">a reference to the socket, to be exposed via the Socket property</param>
public ErrorPollingException(string message, NetMQSocket socket)
: base(message)
{
Socket = socket;
}
public PollerPollItem(NetMQSocket socket, PollEvents events)
: base(socket.SocketHandle, events)
{
m_socket = socket;
}
/// <summary>
/// Gets whether <paramref name="socket"/> has been added to this <see cref="Poller"/>.
/// </summary>
public bool ContainsSocket(NetMQSocket socket)
{
return(m_sockets.Contains(socket));
}
