class DEBUGGER__::ProcessGroup

def after_fork
end

def initialize
  @lock_file = nil
end

def lock
  true
end

def locked?
  true
end

def multi?
  @lock_file
end

def multi_process!
  require 'tempfile'
  @lock_tempfile = Tempfile.open("ruby-debug-lock-")
  @lock_tempfile.close
  extend MultiProcessGroup
end

def sync
  yield
end

def trylock
  true
end

def unlock
  true
end