[boost] boost::future and exceptions

Subject: [boost] boost::future and exceptions
From: Andy Venikov (avenikov_at_[hidden])
Date: 2011-03-10 11:24:01

What's the proper way to make sure user-created exceptions are 
propagated between threads?

When a user exception is thrown from packaged_task, future.get() throws 
"boost::unknown_exception".

I understand that without a language support it's impossible to 
propagate the exception correctly, but I couldn't find any documentation 
that describes proper steps. I tried deriving my_exception from 
std::exception - didn't help.

Thanks,
   Andy.

P.S. There's no boost::async() equivalent to std::async(), is there?