class INotify::Notifier

def initialize

Raises:
  • (SystemCallError) - if inotify failed to initialize for some reason

Returns:
  • (Notifier) - 
def initialize
  @running = Mutex.new
  @pipe = IO.pipe
  # JRuby shutdown sometimes runs IO finalizers before all threads finish.
  if RUBY_ENGINE == 'jruby'
    @pipe[0].autoclose = false
    @pipe[1].autoclose = false
  end
  @watchers = {}
  fd = Native.inotify_init
  unless fd < 0
    @handle = IO.new(fd)
    @handle.autoclose = false if RUBY_ENGINE == 'jruby'
    return
  end
  raise SystemCallError.new(
    "Failed to initialize inotify" +
    case FFI.errno
    when Errno::EMFILE::Errno; ": the user limit on the total number of inotify instances has been reached."
    when Errno::ENFILE::Errno; ": the system limit on the total number of file descriptors has been reached."
    when Errno::ENOMEM::Errno; ": insufficient kernel memory is available."
    else; ""
    end,
    FFI.errno)
end