About Thread Completion Notify.

hi to all folks,
i want to create the following senario:
i have a T1 (Thread 1) that acts like http server that receives incoming
requests.
From that T1, i want to spawn from T1 to Tn thread jobs and beeing able to
be
notified when each of these threads finished it's job.

I would like to implement it with the functionality of the ThreadPool,
i also looked at WaitHandle, WaitAny etc etc.

I also noticed from the msdn example that if i use the
AutoResetEvent. Set()
method, i just set the state of the event to signaled but i see no way of
quering this and find it's state so i can understand that it is completed
, and the WaitAll and WaitAny stuff just blocks my T1 so all or any Tn
finishes it's job.

But how i can automate this procedure and each thread notify the main T1
of
the completion of it's job ??
the following is from the msdn help:
using System;
using System.Threadin g;

public sealed class App {
// Define an array with two AutoResetEvent WaitHandles.
static WaitHandle[] waitHandles = new WaitHandle[] {
new AutoResetEvent( false),
new AutoResetEvent( false)
};

// Define a random number generator for testing.
static Random r = new Random();

static void Main() {
AutoResetEvent are = new AutoResetEvent( false);
are.Set
// Queue up two tasks on two different threads;
// wait until all tasks are completed.
DateTime dt = DateTime.Now;
Console.WriteLi ne("Main thread is waiting for BOTH tasks to complete.");
ThreadPool.Queu eUserWorkItem(n ew WaitCallback(Do Task), waitHandles[0]);
ThreadPool.Queu eUserWorkItem(n ew WaitCallback(Do Task), waitHandles[1]);
WaitHandle.Wait All(waitHandles );

// The time shown below should match the longest task.
Console.WriteLi ne("Both tasks are completed (time waited={0})",
(DateTime.Now - dt).TotalMillis econds);

// Queue up two tasks on two different threads;
// wait until any tasks are completed.
dt = DateTime.Now;
Console.WriteLi ne();
Console.WriteLi ne("The main thread is waiting for either task to
complete.");
ThreadPool.Queu eUserWorkItem(n ew WaitCallback(Do Task), waitHandles[0]);
ThreadPool.Queu eUserWorkItem(n ew WaitCallback(Do Task), waitHandles[1]);

int index = WaitHandle.Wait Any(waitHandles );
// The time shown below should match the shortest task.
Console.WriteLi ne("Task {0} finished first (time waited={1}).",
index + 1, (DateTime.Now - dt).TotalMillis econds);
}

static void DoTask(Object state) {
AutoResetEvent are = (AutoResetEvent ) state;
int time = 1000 * r.Next(2, 10);
Console.WriteLi ne("Performing a task for {0} milliseconds.", time);
Thread.Sleep(ti me);
are.Set();
}
}

thanks in advance fro any help

objectref,

Instead of using events and whatnot, why not just have the DoWork
method call a function at the end to indicate that the task is done, and
then perform whatever work you need to do at that point? Unless you have
a thread somewhere else waiting on the fact that these tasks are done
(which you probably don't since you are servicing requests in separate
threads anyways), you shouldn't have a need for waiting on events.

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"objectref" <ob*******@medi atrel.com> wrote in message
news:%2******** ********@TK2MSF TNGP14.phx.gbl. ..

hi to all folks,
i want to create the following senario:
i have a T1 (Thread 1) that acts like http server that receives incoming
requests.
From that T1, i want to spawn from T1 to Tn thread jobs and beeing able
to be
notified when each of these threads finished it's job.

I would like to implement it with the functionality of the ThreadPool,
i also looked at WaitHandle, WaitAny etc etc.

I also noticed from the msdn example that if i use the
AutoResetEvent. Set()
method, i just set the state of the event to signaled but i see no way of
quering this and find it's state so i can understand that it is completed
, and the WaitAll and WaitAny stuff just blocks my T1 so all or any Tn
finishes it's job.

But how i can automate this procedure and each thread notify the main T1
of
the completion of it's job ??
the following is from the msdn help:
using System;
using System.Threadin g;

public sealed class App {
// Define an array with two AutoResetEvent WaitHandles.
static WaitHandle[] waitHandles = new WaitHandle[] {
new AutoResetEvent( false),
new AutoResetEvent( false)
};

// Define a random number generator for testing.
static Random r = new Random();

static void Main() {
AutoResetEvent are = new AutoResetEvent( false);
are.Set
// Queue up two tasks on two different threads;
// wait until all tasks are completed.
DateTime dt = DateTime.Now;
Console.WriteLi ne("Main thread is waiting for BOTH tasks to complete.");
ThreadPool.Queu eUserWorkItem(n ew WaitCallback(Do Task), waitHandles[0]);
ThreadPool.Queu eUserWorkItem(n ew WaitCallback(Do Task), waitHandles[1]);
WaitHandle.Wait All(waitHandles );

// The time shown below should match the longest task.
Console.WriteLi ne("Both tasks are completed (time waited={0})",
(DateTime.Now - dt).TotalMillis econds);

// Queue up two tasks on two different threads;
// wait until any tasks are completed.
dt = DateTime.Now;
Console.WriteLi ne();
Console.WriteLi ne("The main thread is waiting for either task to
complete.");
ThreadPool.Queu eUserWorkItem(n ew WaitCallback(Do Task), waitHandles[0]);
ThreadPool.Queu eUserWorkItem(n ew WaitCallback(Do Task), waitHandles[1]);

int index = WaitHandle.Wait Any(waitHandles );
// The time shown below should match the shortest task.
Console.WriteLi ne("Task {0} finished first (time waited={1}).",
index + 1, (DateTime.Now - dt).TotalMillis econds);
}

static void DoTask(Object state) {
AutoResetEvent are = (AutoResetEvent ) state;
int time = 1000 * r.Next(2, 10);
Console.WriteLi ne("Performing a task for {0} milliseconds.", time);
Thread.Sleep(ti me);
are.Set();
}
}

thanks in advance fro any help