From: Philip Mak <pmak@...>
Date: 2003-09-21T03:21:25+09:00
Subject: Re: Deadlock?

Nobu Nokada wrote:
> Mutex uses Thread#stop to wait to be unlocked.

I don't think I'm doing very much with Mutex, though. I only have
these two things:

	@@mutex.synchronize do
		@@num_sending += 1
	end

	@@mutex.synchronize do
		@@num_sending -= 1
	end

Those should be executed fairly quickly, shouldn't they? Since I'm
just incrementing and decrementing a number.

>> Anyone know what to make of this 62.65% time consumption by
>> Thread#stop? Could it be that somehow my threads are deadlocking
>> each other?
>
> Do you define the signal handler?

The only signal handling code in my program is this, which happens in
the main thread:

	["SIGTERM", "SIGINT"].each do |sig|
		trap(sig) { shutdown }
	end

Is that what you're referring to when you say "signal handler"?