Re: [boost] ASIO into the standard (was: Re: C++ committee meeting report)

Subject: Re: [boost] ASIO into the standard (was: Re: C++ committee meeting report)
From: Nat Goodspeed (nat_at_[hidden])
Date: 2014-07-11 10:47:19

On Tue, Jul 8, 2014 at 10:34 AM, pfultz2 <pfultz2_at_[hidden]> wrote:

> Ideally,
> it would be nice if there were facades that would make an async stream ->
> sync stream, and a sync stream -> async stream.

For such flexibility, you're better off to make all fundamental I/O
operations async.

ASIO already has adapters that can block until any of its async I/O
operation completes. Moreover, you can provide different adapters to
block at varying levels of granularity: block the whole thread, block
the calling fiber, block a coroutine.

But how could you adapt a synchronous operation to be async? Your code
will not regain control until the synchronous operation has completed.
You have no chance to do anything clever in the meantime.