Add hup-test example.

Author: ioquatix

examples/hup-test/child.rb

@@ -0,0 +1,42 @@
+#!/usr/bin/env ruby
+
+require_relative '../../lib/async'
+require 'console'
+
+Async do |task|
+	while true
+		task.async do
+			Console.logger.info("Child running.")
+			sleep 0.1
+		end.wait
+	end
+end
+
+# ruby3-tcp-server-mini-benchmark$ ruby loop.rb async-scheduler.rb 
+# spawn
+# /usr/bin/wrk -t1 -c1 -d1s http://localhost:9090
+# waiting for process to die
+# spawn
+# /usr/bin/wrk -t1 -c1 -d1s http://localhost:9090
+# waiting for process to die
+# ^Cloop.rb:24:in `waitpid': Interrupt
+# 	from loop.rb:24:in `block in <main>'
+# 	from loop.rb:15:in `loop'
+# 	from loop.rb:15:in `<main>'
+# /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/list.rb:250:in `initialize': Interrupt
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/list.rb:298:in `new'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/list.rb:298:in `each'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/list.rb:176:in `each'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/node.rb:240:in `terminate'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/scheduler.rb:52:in `close'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/scheduler.rb:46:in `ensure in scheduler_close'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/scheduler.rb:46:in `scheduler_close'
+# /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/node.rb:110:in `transient?': SIGHUP (SignalException)
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/node.rb:47:in `removed'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/list.rb:132:in `remove!'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/list.rb:121:in `remove'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/node.rb:182:in `remove_child'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/node.rb:197:in `consume'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/task.rb:287:in `finish!'
+# 	from /home/jsaak/.gem/ruby/3.2.1/gems/async-2.6.1/lib/async/task.rb:360:in `block in schedule'
+

examples/hup-test/main.rb

@@ -0,0 +1,13 @@
+#!/usr/bin/env ruby
+
+require 'console'
+
+while true
+	pid = Process.spawn("./child.rb")
+	Console.logger.info("Spawned child.", pid: pid)
+	sleep 2
+	Console.logger.info("Sending HUP to child.", pid: pid)
+	Process.kill(:HUP, pid)
+	status = Process.waitpid(pid)
+	Console.logger.info("Child exited.", pid: pid, status: status)
+end