/// <summary>
/// Get an abortable thread from the pool. Wait until Run() is called on the returned IThreadControl.
/// </summary>
/// <param name="work">actual work to be executed by this thread</param>
/// <param name="arg">application arg</param>
/// <param name="done">called when the work is finished</param>
/// <returns>control object for the abortable thread</returns>
public IThreadControl GetThread(WaitCallback work, object arg, CompletionCallback done)
{
ThreadControl ctl;
lock (_Sync)
{
if (_Free.Count > 0)
{
ctl = _Free.Pop();
ctl.Proc = work;
ctl.Arg = arg;
}
else if (_Busy.Count < _Capacity)
{
ctl = new ThreadControl(_Prefix, this) { Proc = work, Arg = arg };
ctl.Start();
}
else return null;
_Busy.Add(ctl);
}
ctl.OnCompletion = done;
return ctl;
}
public void Start(int minThreads, int maxThreads)
{
lock (_Sync)
{
if (_Recycler != null && _Recycler.IsAlive) throw new InvalidOperationException("Thread pool already initialized");
_Capacity = maxThreads;
_Free = new Stack<ThreadControl>(maxThreads);
_Busy = new HashSet<ThreadControl>();
_Run = true;
_Recycler = new Thread(RecyclerAborter) { Name = _Prefix + "-recycler", IsBackground = true };
_Recycler.Start();
for (int i = 0; i < minThreads; i++)
{
var ctl = new ThreadControl(_Prefix, this);
_Free.Push(ctl);
ctl.Start();
}
}
}