Re: [Boost-users] [asio] some design questions

From: Christopher Kohlhoff (chris_at_[hidden])
Date: 2007-06-12 18:50:36

Yuval Ronen wrote:
> 1. The "Proactor" page has Advantages/Disadvantages section, but it 
> doesn't specify in comparison to what (advantages and disadvantages are 
> always compared to something). I'm getting the impression that it's 
> compared to the Reactor approach. Is this correct?

Actually it is compared to both the Reactor and thread-per-connection approaches.

> 2. The "Platform-Specific Implementation" page notes that when using 
> select/epoll/kqueue, demultiplexing is performed in one of the threads 
> that calls boost::asio::io_service::run(). I assume that when this 
> thread is awaken to perform some task, one of the other threads that 
> called run() on the same boost::asio::io_service takes it position as 
> waiting on select/epoll/kqueue. Is this correct?

Yes, that's correct.

> 3. ... So I guess that if I 
> resolve() rather than async_resolve(), then no thread is created, and 
> the actual resolving is done in the thread that called resolve()?

That's also correct.

Thanks for the suggestions. I will add the clarifications to the documentation.

Cheers,
Chris