Method: LIBUSB::Context#on_pollfd_added

Defined in:
lib/libusb/context.rb

#on_pollfd_added {|pollfd| ... } ⇒ Object

Register a notification block for file descriptor additions.

This block will be invoked for every new file descriptor that libusb uses as an event source.

To disable the notification callback, execute on_pollfd_added without a block.

Note that file descriptors may have been added even before you register these notifiers (e.g. at #initialize time).

Yield Parameters:

  • pollfd (Pollfd) —

    The added file descriptor is yielded to the block



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# File 'lib/libusb/context.rb', line 472

def on_pollfd_added &block
  @on_pollfd_added = if block
    proc do |fd, events, _|
      pollfd = Pollfd.new fd, events
      block.call pollfd
    end
  end
  Call.libusb_set_pollfd_notifiers @ctx, @on_pollfd_added, @on_pollfd_removed, nil
end