How to be sure all sub thread finished?

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Hi all,
I have a function like that

// initial some thread
Thread td1 = new ...
Thread td2 = new ...
Thread td3 = new ...

// start those thread
td1.Start();
td2.Start();
td3.Start();

// wait for all thread finished.
???? => what is solution for this?

// this action have to wait all threads finish before be started.
doNextAction();

Could you show me how to be sure all child thread finished?
Thank so much,
TuanNM

Posted 15-Feb-12 4:02am

TuanNGUYEN

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Dave Kreskowiak · Accepted Answer · 2012-02-15T04:10:00

Solution 1

See Thread.Join[^].

In your example:

td1.Join();
td2.Join();
td3.Join();

Posted 15-Feb-12 4:10am

Dave Kreskowiak

Updated 15-Feb-12 4:11am

v2

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TuanNGUYEN 15-Feb-12 10:56am

Thanks.

OriginalGriff · Accepted Answer · 2012-02-15T04:12:00

Solution 2

You could use Thread.Join, but that will block until the thread is indeed finished.
You could poll Thread.IsAlive, but that isn't a brilliant idea either.
I would have a ThreadFinished event handler, in which I checked all three threads IsAlive property. When they are all done, you can continue.

Posted 15-Feb-12 4:12am

OriginalGriff

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TuanNGUYEN 15-Feb-12 10:56am

Thanks.