Created
July 13, 2010 20:58
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require 'ffi' | |
require 'java' | |
module Process | |
class Foreign | |
SC_CLK_TCK = com.kenai.constantine.platform.Sysconf::_SC_CLK_TCK.value | |
extend FFI::Library | |
ffi_lib FFI::Library::LIBC | |
class Times < FFI::Struct | |
layout \ | |
:utime => :long, | |
:stime => :long, | |
:cutime => :long, | |
:cstime => :long | |
end | |
attach_function :times, [ :buffer_out ], :long | |
attach_function :sysconf, [ :int ], :long | |
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 | |
if $0 == __FILE__ | |
while true | |
10.times { system("ls -l / > /dev/null") } | |
t = Process.times | |
puts "utime=#{t.utime} stime=#{t.stime} cutime=#{t.cutime} cstime=#{t.cstime}" | |
sleep 1 | |
end | |
end |
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