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c#multithreading
Pablo Honey
Pablo Honey

Reputation: 1096

Static class constructor which is called once per thread

I'm looking for static class constructor which is called once per thread. Something like this :

class MyClass 
{
    [ThreadStatic] // This is not working with a method of course. 
    static MyClass() 
    {

    }
}

What is the best way to achieve it ?

Upvotes: 0

Views: 156

Answers (2)

sstan
sstan

Reputation: 36513

I would use the ThreadLocal class for this. It's similar to using the ThreadStatic keyword, but is much more convenient to use when you need to have initialization code per thread, as seems to be your case.

So if you have:

public class MyClass 
{
    public MyClass() 
    {
        // normal constructor, with normal initialization code here.
    }
}

Wherever you are interested in having a separate instance of MyClass per thread, you can do the following:

ThreadLocal<MyClass> threadSpecificMyClass = new ThreadLocal<MyClass>(() => new MyClass());

You can then share threadSpecificMyClass between multiple threads, but they will all get different instances when invoking threadSpecificMyClass.Value. And you don't have to worry about checking for null, because the initialization happens automatically.

Upvotes: 3

Reinard
Reinard

Reputation: 3654

Can't you create a (static) property and assign a new instance to it? Then make the property Threadstatic?

Upvotes: 1

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