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class ::Object
  SIGNALS = {
    1  => "SIGHUP", 2  => "SIGINT", 3  => "SIGQUIT", 4  => "SIGILL", 5  => "SIGTRAP", 6  => "SIGABRT",
    7  => "SIGPOLL", 8  => "SIGFPE", 9  => "SIGKILL", 10 => "SIGBUS", 11 => "SIGSEGV", 12 => "SIGSYS",
    13 => "SIGPIPE", 14 => "SIGALRM", 15 => "SIGTERM", 16 => "SIGURG", 17 => "SIGSTOP", 18 => "SIGTSTP",
    19 => "SIGCONT", 20 => "SIGCHLD", 21 => "SIGTTIN", 22 => "SIGTTOU", 24 => "SIGXCPU", 25 => "SIGXFSZ",
    26 => "SIGVTALRM", 27 => "SIGPROF", 30 => "SIGUSR1", 31 => "SIGUSR2"
  }
  
  begin
    def __jtrap(sig, cmd = nil, &block)
      sig = SIGNALS[sig] if sig.kind_of?(Fixnum)
      sig = sig.to_s.sub(/^SIG(.+)/,'\1')

      if block
        Signal::__jtrap_kernel(block, sig)
      elsif cmd
        case cmd
        when Proc
          Signal::__jtrap_kernel(cmd, sig)
        when 'EXIT'
          Signal::__jtrap_kernel(proc{exit}, sig)
        when 'SIG_IGN', 'IGNORE'
          Signal::__jtrap_kernel(proc{}, sig)
        when 'SIG_DFL', 'DEFAULT'
          # do nothing...because I don't think we can return to old default
        when String
          Signal::__jtrap_kernel(proc{eval cmd, TOPLEVEL_BINDING}, sig)
        else
          Signal::__jtrap_kernel(proc{cmd.call}, sig)
        end
      end
    rescue Exception
      warn "The signal #{sig} is in use by the JVM and will not work correctly on this platform"
    end
  rescue NameError
    def __jtrap(*args, &block)
      warn "trap not supported or not allowed by this VM"
    end
  end
end