/// <summary>
/// Constructor of DiReCT threadpool
/// </summary>
/// <param name="SizeMax">
/// Maximum threadpool size
/// </param>
/// <param name="SizeMin">
/// Minimum threadpool size
/// </param>
/// <param name="ThreadIdleTime">
/// The number of seconds a thread must be idle before decreasing
/// threadpool size to SizeMin
/// </param>
public DiReCTThreadPool(int SizeMax, int SizeMin = 5,
int IdleTime = 60)
{
//check if variables are proper
if (SizeMax < SizeMin)
{
throw new ArgumentException(
"Parameter can not be less than MinThread", "MaxThread");
}
if (SizeMin < 1)
{
throw new ArgumentException(
"Parameter can not be less than 1", "MinThread");
}
if (IdleTime < 0)
{
throw new ArgumentException(
"Parameter can not be negative", "IdleTime");
}
// Create a thread pool controller
threadPoolController = new ThreadpoolController(SizeMax,
SizeMin,
IdleTime,
ThreadWork);
threadPoolController.Init();
// Ask for a ThreadItem and assign it as a leader
leaderThreadItem = threadPoolController.GetThreadItem();
leaderThreadItem.PromoteNewLeaderEvent.Set();
}
public void Init()
{
for (int i = 0; i < minThread; i++)
{
// All thread join idleThreadQueue
ThreadItem threadItem = CreateThread();
IdleThreadQueue.Enqueue(threadItem);
Debug.WriteLine("Thread[{0}] Create Done",
threadItem._Thread.ManagedThreadId);
}
}
private void DebugGetLeaderThread(ThreadItem threadItem)
{
if (threadItem != null)
{
Debug.WriteLine("Thread[{0}] is Leader Create Done",
threadItem._Thread.ManagedThreadId);
}
else
{
Debug.WriteLine("No idle threads");
}
}
protected virtual void Dispose(bool disposing)
{
if (disposed)
{
return;
}
threadPoolController.Dispose();
if (disposing)
{
leaderThreadItem = null;
workQueue = null;
workQueueLock = null;
}
disposed = true;
}
private ThreadItem CreateThread()
{
ThreadItem threadItem;
lock (CurrentThreadQuantityLock)
if (CurrentThreadQuantity < maxThread)
{
threadItem = new ThreadItem(threadWork);
ThreadItemList.Add(threadItem);
threadItem._Thread.Start(threadItem);
CurrentThreadQuantity++;
}
else
{
threadItem = null;
}
return(threadItem);
}
private void ThreadWork(object ThreadItem)
{
ThreadItem myThreadItem = (ThreadItem)ThreadItem;
// Check whether the thread pool/follower thread is terminating
while (threadPoolController.IsRunning && myThreadItem.IsRunning)
{
Debug.WriteLine("Thread[{0}] Waiting to be a Leader",
(myThreadItem)._Thread.ManagedThreadId);
myThreadItem.PromoteNewLeaderEvent.WaitOne();
// Record the time when thread becomes a leader
threadPoolController.BecomeLeaderTimePeriod = DateTime.Now;
//Wait for work to arrive
SpinWait.SpinUntil(() => (
workQueue.Count != 0 ||
!threadPoolController.IsRunning ||
!(myThreadItem.IsRunning)
));
if (threadPoolController.IsRunning &&
(myThreadItem).IsRunning)
{
// Get work from WorkQueue
WorkItem Work = null;
if (workQueue.Count != 0)
{
lock (workQueueLock)
Work = workQueue.Dequeue();
}
if (Work != null)
{
// Ask for a thread and assign it as a leader
lock (threadPoolController.ThreadVariableChangeLock)
leaderThreadItem = threadPoolController.
GetThreadItem();
if (leaderThreadItem != null)
{
leaderThreadItem.PromoteNewLeaderEvent.Set();
}
// Do work
try
{
switch (Work.GroupName)
{
//All DM Function
case FunctionGroupName.DataManagementFunction:
DMModule.DMWorkerFunctionProcessor(Work);
break;
case FunctionGroupName.QualityControlFunction:
RTQCModule.RTQCWorkerFunctionProcessor(
Work);
break;
}
}
catch
{
// Reset after the thread is aborted
if (Thread.CurrentThread.ThreadState
== System.Threading.ThreadState.AbortRequested ||
Thread.CurrentThread.ThreadState.ToString()
== "Background, AbortRequested")
{
Debug.WriteLine(
"Thread[{0}] is aborted，reset Thread[{0}]",
Thread.CurrentThread.ManagedThreadId);
Thread.ResetAbort();
}
}
}
// Become leader if no leader, else join idle thread queue
lock (threadPoolController.ThreadVariableChangeLock)
if (leaderThreadItem == null)
{
leaderThreadItem = myThreadItem;
leaderThreadItem.PromoteNewLeaderEvent.Set();
Debug.WriteLine("Thread[{0}] become a new leader",
Thread.CurrentThread.ManagedThreadId);
}
else
{
Debug.WriteLine("Thread[{0}] join idle queue",
Thread.CurrentThread.ManagedThreadId);
threadPoolController.EnqueueIdleThreadQueue
= myThreadItem;
}
}
}
// Release thread when finish
Debug.WriteLine("Thread[{0}] Close Done",
(myThreadItem)._Thread.ManagedThreadId);
threadPoolController.ReduceCurrentThreadQuantity();
threadPoolController.RemoveThread(myThreadItem);
(myThreadItem).PromoteNewLeaderEvent.Close();
(myThreadItem)._Thread = null;
}
// Removes the specified Threaditem from ThreadItemList
public void RemoveThread(ThreadItem threaditem)
{
ThreadItemList.Remove(threaditem);
}
