Re: [boost] [futures] boost::futures

From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2007-03-09 14:57:52

Braddock Gaskill wrote:

> I just started looking at the boost::futures zip file in the 
> vault as well. I'd really like to use it for a current 
> project if it is near maturity.

It's far from mature. Just a first (but functional) sketch.

> Can I use it in conjunction with my own thread pool or with 
> an active object?

If you write the thread pool or active object support, certainly. The
library as is doesn't know anything about thread pools or active objects. It
just spawns a new thread for every future. 

> For example, I'd want something like: 
> int f();
> future<int> val = myThreadPool.queue<int>(f);
> val.ready()
> val.cancel()
> etc..

val.cancel() isn't supported at all, mainly because Boost.Thread doesn't
support cancel.

> The documentation is incomplete except for the simple case, 
> which appears to spawn a new thread for every new future?

Yes.

> The ability to use a future with the asio::io_service in 
> particular would be quite powerful.

Agreed. And I'm happy to assist, if needed.

Regards Hartmut

> Thanks,
> Braddock Gaskill
> Dockside Vision Inc
> 
> On Tue, 20 Feb 2007 12:11:56 -0800, Sohail Somani wrote:
> > I was looking at the futures implementation in the boost vault. It 
> > looks very promising, I must say. One of the open issues however is 
> > thread cancellation which I imagine will be important in 
> the case of the "or"
> > futures group.
> > 
> > Has there been any progress on this front? One of the 
> coolest things 
> > about boost libraries has been the gradual improvement of 
> legacy C/C++ 
> > code by non-invasive means. I can't imagine solving this problem 
> > without invasive means (or traditionally undesirable means, i.e. 
> > something like
> > thread->die()). I'm not saying that its non-invasive or nothing, but
> > there are people smarter than me working on this problem!
> > 
> > Thanks in advance,
> > 
> > Sohail
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