CODEWITHSUNDEEP
c#multithreadingexecutioncontext
David
David

Reputation: 1136

Thread safe usage of CallContext.LogicalSetData

I am using CallContext.LogicalGetData in order to share information across asynchronous code.

I want to perform this kind of call in a 'thread-safe' fashion: 

var val = CallContext.LogicalGetData(key);
if(val==null)
{
   CallContext.LogicalSetData(key, initialValue);
}
return val;

Any idea on how to do that ?

Upvotes: 1

Views: 1149

Answers (1)

Matias Cicero
Matias Cicero

Reputation: 26281

Use a lock:

private static readonly object _lock = new object();

public static object GetData(string key, object initialValue)
{
    lock(_lock)
    {
       object val = CallContext.LogicalGetData(key);
       if (val == null)
           CallContext.LogicalSetData(key, initialValue);
       return val;
    }
}

Note: The class or method do not have to be static. Just make sure that all the threads use the same lock when accesing the critical section.

Upvotes: 1

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