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Threading problem

Posted on 2003-11-13
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Last Modified: 2010-04-16
I have a bunch of threads that perform some of the longer operations in my program.  I am using the form:

ThreadStart starter = new ThreadStart(func);
Thread t = new Thread(starter);
t.Start();

1.  Should I change it all to delegates, does it matter?

2.  When I close my main application window, threads still run to completion, I want to kill them all.
3.  When a user logs off but the program is still running, I want to kill all open threads (or at least notify the UI to wait until they have completed).

What is the best way to structure this?
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Question by:jjacksn
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7 Comments
 
LVL 11

Expert Comment

by:Agarici
ID: 9741587
if you want to stop the working when your main window has been closed, you can call Abort() on each runing thread in your main windows close event handler.

to have a thread waiting for another thread to terminate, use Join() on the first thread.
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Author Comment

by:jjacksn
ID: 9741858
so I just have a list of threads Thread[] and call t.WhatyouSaid from my main, calling thread?  

when the thread completes, will calling t.Join() or t.Abort() throw an error, or just do nothing?
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Author Comment

by:jjacksn
ID: 9741893
Should I be using thread pools for this?  If so, how do I do that (can you point me to a tutorial).
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LVL 48

Expert Comment

by:AlexFM
ID: 9742042
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Expert Comment

by:AlexFM
ID: 9742081
This article describes how to run a worker thread, send information from it to main thread and stop worker thread correctly.

About thread pool - thread pool is used when all threads make the same work which may be done by same thread function. For example, threads talking with clients in HTTP server. If this is your case, and number of clients is not restricted, consider using thread pool.
If all your threads are different, each one of them make it's own work, use the way described in the article for each thread.
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Author Comment

by:jjacksn
ID: 9744924
They are pretty simple threads, I'm just using them for calls to remote objects that take a while.
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Accepted Solution

by:
_TAD_ earned 250 total points
ID: 9745466


ThreadStart starter = new ThreadStart(func);
Thread t = new Thread(starter);
t.isBackground = true;
t.Start();


By setting the thread to a background thread means that when the main thread is killed, all other threads die immediately
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