WIP

lib/channel/runtime.rb

@@ -0,0 +1,15 @@
+require 'thread'
+
+module Channel::Runtime
+  module_function
+
+  def go(prc, *args)
+    Thread.new { prc.call(*args) }
+  end
+end
+
+module Kernel
+  def go(prc, *args)
+    Channel::Runtime.go(prc, *args)
+  end
+end

lib/channel/timer.rb

@@ -0,0 +1,17 @@
+class Channel::Timer
+  attr_reader :channel
+
+  def initialize(delay)
+    @channel = Channel.new(1)
+    @prc = -> { sleep delay; channel << Time.now }
+    start
+  end
+
+  def start
+    Channel::Runtime.go @prc
+  end
+
+  def self.after(delay)
+    new(delay).channel
+  end
+end