private void RebuildPollset()
{
#if !NET35
Debug.Assert(m_isSchedulerThread.Value);
#endif
// Recreate the m_pollSet and m_pollact arrays.
m_pollSet = new NetMQSelector.Item[m_sockets.Count + m_pollinSockets.Count];
m_pollact = new NetMQSocket[m_sockets.Count];
// For each socket in m_sockets,
// put a corresponding SelectItem into the m_pollSet array and a reference to the socket itself into the m_pollact array.
uint index = 0;
foreach (var socket in m_sockets)
{
m_pollSet[index] = new NetMQSelector.Item(socket, socket.GetPollEvents());
m_pollact[index] = socket;
index++;
}
foreach (var socket in m_pollinSockets.Keys)
{
m_pollSet[index] = new NetMQSelector.Item(socket, PollEvents.PollError | PollEvents.PollIn);
index++;
}
// Mark this as NOT having any fresh events to attend to, as yet.
m_isPollSetDirty = false;
}
/// <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);
}
}
}
private void RebuildPollset()
{
#if !NET35
Debug.Assert(m_isSchedulerThread.Value);
#endif
// Recreate the m_pollSet and m_pollact arrays.
m_pollSet = new NetMQSelector.Item[m_sockets.Count + m_pollinSockets.Count];
m_pollact = new NetMQSocket[m_sockets.Count];
// For each socket in m_sockets,
// put a corresponding SelectItem into the m_pollSet array and a reference to the socket itself into the m_pollact array.
uint index = 0;
foreach (var socket in m_sockets)
{
m_pollSet[index] = new NetMQSelector.Item(socket, socket.GetPollEvents());
m_pollact[index] = socket;
index++;
}
foreach (var socket in m_pollinSockets.Keys)
{
m_pollSet[index] = new NetMQSelector.Item(socket, PollEvents.PollError | PollEvents.PollIn);
index++;
}
// Mark this as NOT having any fresh events to attend to, as yet.
m_isPollSetDirty = false;
}
