namespace Event_Firing_TEST_Profiler
{
public partial class Form1 : Form
{
public static int totalExecutions = 0;

public Form1()
{
InitializeComponent();
}

Record _record = new Record();
Queue _watchers = new Queue();

private void timer_Tick(object sender, EventArgs e)
{
_record.ID++;
for(int i = 0; i 10000)
{
for(int i = 0; i < _watchers.Count * 0.75; i++)
{
RecordWatcher watcher = _watchers.Dequeue();
//watcher.Dispose();
}
_record.ClearEvents();

}

_txtInfo.Text = _record.Info;
}

private void Form1_Load(object sender, EventArgs e)
{
timer.Enabled = true;
}
}

class Record
{
public delegate void UpdateHandler(object sender, EventArgs e);
private event UpdateHandler _onUpdate;

public event UpdateHandler OnUpdate
{
add { _onUpdate += value; }
remove { _onUpdate -= value; }
}

public void ClearEvents()
{
_onUpdate = null;
}

private int _id;
private int _firedThisRound;
private TimeSpan _fireSpan;
public int ID
{
get { return _id; }
set
{
_id = value;
_firedThisRound = 0;
DateTime start = DateTime.Now;
FireEventOnCallerThread(_onUpdate, this, EventArgs.Empty);
DateTime end = DateTime.Now;
_fireSpan = end.Subtract(start);
}
}
public void IncrementFired()
{
_firedThisRound++;
}
public string Info
{
get
{
int dLength = 0;
if(_onUpdate != null)
{
MulticastDelegate md = _onUpdate;
Delegate[] d = md.GetInvocationList();
dLength = d.Length;
}
return "delegate.count = " + dLength.ToString("#,0") + ", fired this round = " + _firedThisRound.ToString("#,0") + ", fireSpan = " + _fireSpan.TotalSeconds.ToString("#,0.000") + ", totalExecutions = " + Form1.totalExecutions.ToString("#,0");
}
}

public static void FireEventOnCallerThread(MulticastDelegate md, object sender, object e)
{
// If there is no event, then we have nothing to do
if(md == null) return;

// Create an argument array for the function
object[] args = new object[] { sender, e };

// Loop each delegate in the invocation list
foreach(Delegate d in md.GetInvocationList())
{
ISynchronizeInvoke isi = d.Target as ISynchronizeInvoke;
if(isi != null && isi.InvokeRequired)
isi.BeginInvoke(d, args);
else
d.DynamicInvoke(args);
}
}
}

class RecordWatcher : IDisposable
{
public Record _record;
public RecordWatcher(Record record)
{
_record = record;
_record.OnUpdate += new Record.UpdateHandler(_record_OnUpdate);
}

void _record_OnUpdate(object sender, EventArgs e)
{
Form1.totalExecutions++;
((Record)sender).IncrementFired();
}