ProcessReaper: single thread reaper

[Peter Levart]

On 03/25/2014 03:05 PM, Peter Levart wrote:
> That's enough races for today.

Or just one more...

The debug log("Unexpected process exit for pid:...") could also be 
reached when new process is spawned by UNIXProcess constructor and 
before the constructor manages to register new consumer for it's pid, 
the child process finishes and gets processed by reaper task, which does 
not find a registration for the pid and reports unexpected process exit. 
But that's just logging. What's important is that when consumer finally 
manages to be registered, it will be called synchronously from the same 
thread that registers it (from UNIXProcess constructor)...

Regards, Peter