Closing out threads - C# / C Sharp

Lilith

Maybe I'm making some assumptions about how threads work. I have a
form that, on the press of a button, starts monitoring some SMTP
connections. On occasions I make changes while the thread is running
in the background. To reload the changed options I have to exit the
function the thread is running and restart it. I have an indicator
that tells me the function is exiting. But on restart I get an
exception that, to the best of my understanding, says that the thread
is still running and cannot be restarted.

So, does the thread keep running after I exit the function? Or is
there something I should be doing to tell the thread to terminate? Do
I need to design the function to run the thread until program's end
but read flags from the UI to stop and reload options?

TIA,
Lilith

Sep 1 '07 #1

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"Lilith" <li****@dcccd.eduwrote in message
news:2q********************************@4ax.com...

Maybe I'm making some assumptions about how threads work. I have a
form that, on the press of a button, starts monitoring some SMTP
connections. On occasions I make changes while the thread is running
in the background. To reload the changed options I have to exit the
function the thread is running and restart it. I have an indicator
that tells me the function is exiting. But on restart I get an
exception that, to the best of my understanding, says that the thread
is still running and cannot be restarted.

What is the exception?

>
So, does the thread keep running after I exit the function? Or is
there something I should be doing to tell the thread to terminate? Do
I need to design the function to run the thread until program's end
but read flags from the UI to stop and reload options?

You can't restart a thread after it has exited. You have to start a new
thread. If you want to keep the same thread running, then what you ought to
do is have some sort of queue that it can access (using some sort of locking
mechanism like lock() or Monitor.Enter()/Monitor.Exit()) and simply have it
periodically check to see if there's information it needs, but don't have it
exit until the app is done.

Alternatively, you can simply let the thread close and fire off a new thread
in its place..

Sep 1 '07 #2

=?Utf-8?B?TW9kZWxCdWlsZGVy?=

How are you currently telling the function running the thread, from the main
app, that the function needs to exit?

It would seem that the executing function just needs to check the settings
as it progresses, rather than restarting it with new settings.

Sep 1 '07 #3

Lilith

On Fri, 31 Aug 2007 20:08:01 -0700, ModelBuilder
<Mo**********@discussions.microsoft.comwrote:

>"Lilith" wrote:

>On Fri, 31 Aug 2007 19:10:00 -0700, ModelBuilder
<Mo**********@discussions.microsoft.comwrote:

>How are you currently telling the function running the thread, from the main
app, that the function needs to exit?

>Probably in a most inappropriate way. :-)

>OK, I vote for unorthodox, but not necessarilly inappropriate... :-)

I try to be inventive with visuals even though anything I write is
generally limited to a small audience. In this case it was a matter
of one button to rule them all.

--
Lilith

Sep 1 '07 #4

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