require 'ffi'

# To change this template, choose Tools | Templates
# and open the template in the editor.
module Process
  class Foreign
    FFI = JRuby::FFI if JRUBY_VERSION =~ /1.1.4/
    extend FFI::Library
    class Times < FFI::Struct
      layout \
        :utime => :clock_t,
        :stime => :clock_t,
        :cutime => :clock_t,
        :cstime => :clock_t
    end
    attach_function :times, [ :pointer ], :clock_t
    attach_function :sysconf, [ :int ], :long
    SC_CLK_TCK = 3
    Tms = Struct.new("Foreign::Tms", :utime, :stime, :cutime, :cstime)
  end
  def self.times
    hz = Foreign.sysconf(Foreign::SC_CLK_TCK).to_f
    t = Foreign::Times.alloc_out(false)
    Foreign.times(t.pointer)
    Foreign::Tms.new(t[:utime] / hz, t[:stime] / hz, t[:cutime] / hz, t[:cstime] / hz)
  end

end
puts "Hello World"
while true
  t = Process.times
  i = 0
  100.times { f = File.open("/dev/null", File::RDONLY); f.close}
  10.times { system("ls -l / > /dev/null") }
  puts "utime=#{t.utime} stime=#{t.stime} cutime=#{t.cutime} cstime=#{t.cstime}"
  sleep 1
end