Sleepy_penguin 3.1.0 - Linux I/O events for Ruby

sleepy_penguin provides access to newer, Linux-only system calls to wait
on events from traditionally non-I/O sources. Bindings to the eventfd,
timerfd, inotify, signalfd (not recommended) and epoll interfaces are


  • add TimerFD::CANCEL_ON_SET constant
    ref: Linux and glibc API changes
  • fix concurrent Epoll#wait on the same epoll fd
  • SignalFD interface removed (unworkable with Ruby runtimes)
  • use rb_update_max_fd() if available (Ruby 1.9.3)
  • reintroduce SLEEPY_PENGUIN_VERSION constant (“3.1.0”)