require File.expand_path(File.join(File.dirname(__FILE__), "bench_helper"))

module Posix
  extend FFI::Library
  ffi_lib FFI::Library::LIBC
  attach_function :time, [ :buffer_out ], :ulong, :ignore_error => true
end

puts "Benchmark FFI time(3) with nil argument performance, #{ITER}x"
10.times {
  puts Benchmark.measure {
    ITER.times { Posix.time(nil) }
  }
}

puts "Benchmark FFI time(3) with pre-allocated buffer performance, #{ITER}x"
buf = FFI::Buffer.new(:time_t)
10.times {
  puts Benchmark.measure {
    ITER.times { Posix.time(buf) }
  }
}


puts "Benchmark FFI time(3) with loop-allocated buffer performance, #{ITER}x"
10.times {
  puts Benchmark.measure {
    ITER.times { Posix.time(FFI::Buffer.new(:time_t)) }
  }
}

puts "Benchmark FFI time(3) with pre-allocated pointer performance, #{ITER}x"
buf = FFI::MemoryPointer.new(:time_t)
10.times {
  puts Benchmark.measure {
    ITER.times { Posix.time(buf) }
  }
}

puts "Benchmark Time.now performance, #{ITER}x"
10.times {
  puts Benchmark.measure {
    ITER.times { Time.now }
  }
}