/// <summary>
/// Prevent any additional threads from starting and return once all existing workers have completed.
/// </summary>
/// <param name="threadShutdownTimeoutMS"></param>
public void EndShutdown(int threadShutdownTimeoutMS = 1000)
{
#if NETFX_CORE
foreach (var pair in scheduledTasks)
{
if (!pair.Value.Wait(threadShutdownTimeoutMS))
{
taskCancellationTokens[pair.Key].Cancel();
if (!pair.Value.Wait(threadShutdownTimeoutMS))
{
LogTools.LogException(new CommsSetupShutdownException("Managed threadpool shutdown error"), "ManagedThreadPoolShutdownError");
}
}
}
#else
List <Thread> allWorkerThreads = new List <Thread>();
lock (SyncRoot)
{
foreach (var thread in threadDict)
{
workerInfoDict[thread.Key].ThreadSignal.Set();
allWorkerThreads.Add(thread.Value);
}
}
//Wait for all threads to finish
foreach (Thread thread in allWorkerThreads)
{
try
{
if (!thread.Join(threadShutdownTimeoutMS))
{
thread.Abort();
}
}
catch (Exception ex)
{
LogTools.LogException(ex, "ManagedThreadPoolShutdownError");
}
}
#endif
lock (SyncRoot)
{
jobQueue.Clear();
taskCancellationTokens.Clear();
scheduledTasks.Clear();
shutdown = false;
}
}
/// <summary>
/// Shutdown any background threads in the host tools
/// </summary>
/// <param name="threadShutdownTimeoutMS"></param>
internal static void ShutdownThreads(int threadShutdownTimeoutMS = 1000)
{
#if !WINDOWS_PHONE && !ANDROID && !NETFX_CORE
try
{
if (NetworkLoadThread != null)
{
NetworkLoadThreadWait.Set();
if (!NetworkLoadThread.Join(threadShutdownTimeoutMS))
{
NetworkLoadThread.Abort();
throw new CommsSetupShutdownException("Timeout waiting for NetworkLoadThread thread to shutdown after " + threadShutdownTimeoutMS.ToString() + " ms. ");
}
}
}
catch (Exception ex)
{
LogTools.LogException(ex, "CommsShutdownError");
}
#endif
}
/// <summary>
/// Takes a network load snapshot (CurrentNetworkLoad) every NetworkLoadUpdateWindowMS
/// </summary>
private static void NetworkLoadWorker()
{
NetworkLoadThreadWait = new ManualResetEvent(false);
//Get all interfaces
NetworkInterface[] interfacesToUse = NetworkInterface.GetAllNetworkInterfaces();
long[] startSent, startReceived, endSent, endReceived;
while (!NetworkComms.commsShutdown)
{
try
{
//we need to look at the load across all adaptors, by default we will probably choose the adaptor with the highest usage
DateTime startTime = DateTime.Now;
IPv4InterfaceStatistics[] stats = new IPv4InterfaceStatistics[interfacesToUse.Length];
startSent = new long[interfacesToUse.Length];
startReceived = new long[interfacesToUse.Length];
for (int i = 0; i < interfacesToUse.Length; ++i)
{
stats[i] = interfacesToUse[i].GetIPv4Statistics();
startSent[i] = stats[i].BytesSent;
startReceived[i] = stats[i].BytesReceived;
}
if (NetworkComms.commsShutdown)
{
return;
}
//Thread.Sleep(NetworkLoadUpdateWindowMS);
#if NET2
NetworkLoadThreadWait.WaitOne(NetworkLoadUpdateWindowMS, false);
#else
NetworkLoadThreadWait.WaitOne(NetworkLoadUpdateWindowMS);
#endif
if (NetworkComms.commsShutdown)
{
return;
}
stats = new IPv4InterfaceStatistics[interfacesToUse.Length];
endSent = new long[interfacesToUse.Length];
endReceived = new long[interfacesToUse.Length];
for (int i = 0; i < interfacesToUse.Length; ++i)
{
stats[i] = interfacesToUse[i].GetIPv4Statistics();
endSent[i] = stats[i].BytesSent;
endReceived[i] = stats[i].BytesReceived;
}
DateTime endTime = DateTime.Now;
List <double> outUsage = new List <double>();
List <double> inUsage = new List <double>();
for (int i = 0; i < startSent.Length; i++)
{
outUsage.Add((double)(endSent[i] - startSent[i]) / ((double)(InterfaceLinkSpeed * (endTime - startTime).TotalMilliseconds) / 8000));
inUsage.Add((double)(endReceived[i] - startReceived[i]) / ((double)(InterfaceLinkSpeed * (endTime - startTime).TotalMilliseconds) / 8000));
}
//double loadValue = Math.Max(outUsage.Max(), inUsage.Max());
double inMax = double.MinValue, outMax = double.MinValue;
for (int i = 0; i < startSent.Length; ++i)
{
if (inUsage[i] > inMax)
{
inMax = inUsage[i];
}
if (outUsage[i] > outMax)
{
outMax = outUsage[i];
}
}
//If either of the usage levels have gone above 2 it suggests we are most likely on a faster connection that we think
//As such we will bump the interface link speed up to 1Gbps so that future load calculations more accurately reflect the
//actual load.
if (inMax > 2 || outMax > 2)
{
InterfaceLinkSpeed = 950000000;
}
//Limit to one
CurrentNetworkLoadIncoming = (inMax > 1 ? 1 : inMax);
CurrentNetworkLoadOutgoing = (outMax > 1 ? 1 : outMax);
currentNetworkLoadValuesIncoming.AddValue(CurrentNetworkLoadIncoming);
currentNetworkLoadValuesOutgoing.AddValue(CurrentNetworkLoadOutgoing);
//We can only have up to 255 seconds worth of data in the average list
int maxListSize = (int)(255000.0 / NetworkLoadUpdateWindowMS);
currentNetworkLoadValuesIncoming.TrimList(maxListSize);
currentNetworkLoadValuesOutgoing.TrimList(maxListSize);
}
catch (Exception ex)
{
//There is no need to log if the exception is due to a change in interfaces
if (ex.GetType() != typeof(NetworkInformationException))
{
LogTools.LogException(ex, "NetworkLoadWorker");
}
//It may be the interfaces available to the OS have changed so we will reset them here
interfacesToUse = NetworkInterface.GetAllNetworkInterfaces();
//If an error has happened we don't want to thrash the problem, we wait for 5 seconds and hope whatever was wrong goes away
Thread.Sleep(5000);
}
}
}
