Module: Facter::Aix::FfiHelper

Defined in:
lib/resolvers/aix/ffi/ffi_helper.rb

Defined Under Namespace

Modules: Libc

Constant Summary collapse

KINFO_GET_AVENRUN = 
1
KINFO_READ = 
8 << 8

Class Method Summary collapse

Class Method Details

.read_load_averages ⇒ Object 



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# File 'lib/resolvers/aix/ffi/ffi_helper.rb', line 24

def self.read_load_averages
  averages = FFI::MemoryPointer.new(:long_long, 3)
  averages_size = FFI::MemoryPointer.new(:int, 1)
  averages_size.write_int(averages.size)

  return if Libc.getkerninfo(KINFO_READ | KINFO_GET_AVENRUN, averages, averages_size, 0).negative?

  averages.read_array_of_long_long(3).map { |x| (x / 65_536.0).round(5) }
end