The filehandle isn't going out of scope. If you look at the code snippet, you'll see that threadA() enqueue()'s the fileno to threadB...and Thread::Queue::Duplex::enqueue() is a blocking operation until threadB respond()s...which it doesn't do until it has dequeue()'d and reconstituted the file handle.

In reply to Re^2: Passing sockets between segregated threads by renodino
in thread Passing sockets between segregated threads by renodino

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