exposing activecnt

Ryan Dahl ry at tinyclouds.org
Tue Nov 23 23:07:39 CET 2010

I would like to have make some actions after ev_loop() drops out due
to the ref count going to zero. These actions might setup new watchers
or may not. Exposing activecnt will allow me to re-enter ev_loop if
the reference count is increased.

Example: https://github.com/ry/node/blob/f123a1ab40d33dbfe35667e9357b4b03c4549ab1/src/node.cc#L1970-1980

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