Re: RFA: Various Windows (mingw32) additions, mostly relating to select or serial ports

[Daniel Jacobowitz <drow at false dot org>]

On Sat, Feb 04, 2006 at 04:01:07PM -0800, Ian Lance Taylor wrote:
> Well, OK, let's try this.  Create a new pipe.  Create yet another new
> thread which reads from the original pipe and writes to the new pipe.
> Freopen the new pipe onto stdin.  When the new thread writes to the
> new pipe, it signals the event loop once, and then waits.  When the
> event loop gets the signal, it indicates that it is OK to read from
> stdin, the new pipe.  When you reenter the event loop, it signals the
> new thread to tell it that it is interested in more data and more
> signals.

I'm not convinced this would work.  Remember, not only do we read from
this pipe just about everywhere, a lot of the time we don't pass
through the event loop.  We'd have to have a thread which did blocking
reads from the original pipe, wrote that data straight through to a new
pipe, and signalled an event whenever it performed a write.  Not only
would that be tricky to get right, but we've also traded off a thread
when selecting for a thread all the time.

Do you think the 10ms poll is sufficiently nasty to justify pursuing
this?  I suppose I could be convinced to give it another try...

-- 
Daniel Jacobowitz
CodeSourcery