Ruby on Rails 5.0.1
Module
ActiveSupport::Concurrency
activesupport/lib/active_support/concurrency/latch.rb
activesupport/lib/active_support/concurrency/share_lock.rb
activesupport/lib/active_support/dependencies/interlock.rb
Namespace
CLASS
ActiveSupport::Concurrency::Latch
CLASS
ActiveSupport::Concurrency::ShareLock