exposing activecnt

[Marc Lehmann]

On Wed, Nov 24, 2010 at 02:23:45PM +0100, Zsbán Ambrus <ambrus at math.bme.hu> wrote:
> On Wed, Nov 24, 2010 at 1:34 PM, Marc Lehmann <schmorp at schmorp.de> wrote:
> 
> That much works.  But now suppose Ryan's program calls some finalizer,
> and possibly wants to know whether there are active watchers after
> that.  He can recall ev_run, but does ev have a way of telling you
> whether it's returned immediately because there are no watchers?

ev_run returns only when he calls ev_break OR when activecnt is zero, both
events visible to him already.

at most he has to keep an extra flag whether he called ev_break, but note
that his example program already maintains an extra flag, so likely this
can be solved with no extra code.

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