lib/rack/reloader.rb in rack-2.0.0.alpha vs lib/rack/reloader.rb in rack-2.0.0.rc1

@@ -24,17 +24,18 @@
       @app = app
       @cooldown = cooldown
       @last = (Time.now - cooldown)
       @cache = {}
       @mtimes = {}
+      @reload_mutex = Mutex.new
 
       extend backend
     end
 
     def call(env)
       if @cooldown and Time.now > @last + @cooldown
         if Thread.list.size > 1
-          Thread.exclusive{ reload! }
+          @reload_mutex.synchronize{ reload! }
         else
           reload!
         end
 
         @last = Time.now