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Multiple Threads Within the IDE

I was noticing that when I run a multi-threaded app from within the IDE and
then I close the main form (which spun off all of the threads), that the
Stop/Pause VCR buttons in the debugger are still available & working. It's
like closing the form did not actually cancel the threads.

From my earlier discussions on the newsgroup, I know how people already feel
about Thread.Abort(), so I was wondering what I need to do to "clean up"
when closing a main form that has spun off worker threads (I was under the
impression that this cleanup would automatically happen, but seeing the
Stop/Pause VCR buttons on the debugger being active & working tell me
otherwise).

Any thoughts would be appreciated.

--
Doug Thews
Director, Customer Solutions
D&D Consulting Services
----------------
Visit my Tech Blog at:
http://www.ddconsult.com/blogs/illuminati/


Nov 16 '05
21 1654
Agreed. It's probably better to just use "true" instead of a variable, and
then catch the Interrupted exception (if you want a thread that runs
continuously and only quits when the app quits - as I was suggesting):

try
{
while( true )
{
// perform whatever
}
}
catch (ThreadInterrup tedException)
{
// Perform cleanup - then return
return;
}
--
Doug Thews
Director, Customer Solutions
D&D Consulting Services
----------------
Visit my Tech Blog at:
http://www.ddconsult.com/blogs/illuminati/

"Jon Skeet [C# MVP]" <sk***@pobox.co m> wrote in message
news:MP******** *************** @msnews.microso ft.com...
Santi <__***********@ ibcentre.es> wrote:
A thread ends when it exists the function that it is executing. If the
thread performs a continuos loop you usually use a boolean to control the
execution, something like:

bool run;

void Foo()
{
while( run )
{
// perform whatever
}
}

So what I do to stop and end the thread in a clean way is:

run = false;

this makes the executuion flow to exit the function and end the thread.


Note that as written, this isn't thread-safe. Either run should be made
volatile, or you should put a lock round both the reading and writing
of it.

See http://www.pobox.com/~skeet/csharp/t...latility.shtml

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

Nov 16 '05 #21
Doug Thews <do*******@remo veme.ddconsult. com> wrote:
Agreed. It's probably better to just use "true" instead of a variable, and
then catch the Interrupted exception (if you want a thread that runs
continuously and only quits when the app quits - as I was suggesting):

try
{
while( true )
{
// perform whatever
}
}
catch (ThreadInterrup tedException)
{
// Perform cleanup - then return
return;
}


No, I don't agree with that. It means that you don't really know where
you were when you were interrupted. I prefer to still use an orderly
stopping procedure, but do it in a thread-safe way.

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too
Nov 16 '05 #22

This thread has been closed and replies have been disabled. Please start a new discussion.

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