Module: Sqreen::Backport::ClockGettime

Defined in:
lib/sqreen/backport/clock_gettime.rb

Defined Under Namespace

Modules: Constants, LibC Classes: Timespec

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sqreen/backport/clock_gettime.rb', line 10

def supported?
  Process.respond_to?(:clock_gettime)
end

Instance Method Details

#clock_gettime(clock_id, unit = :float_second) ⇒ Object

Raises:

  • (SystemCallError) 


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# File 'lib/sqreen/backport/clock_gettime.rb', line 50

def clock_gettime(clock_id, unit = :float_second)
  unless unit == :float_second
    raise "Process.clock_gettime: unsupported unit #{unit.inspect}"
  end

  t = Sqreen::Backport::ClockGettime::Timespec.new
  ret = Sqreen::Backport::ClockGettime::LibC.clock_gettime(
    clock_id,
    t.pointer,
  )

  raise SystemCallError, "Errno #{FFI.errno}" if ret == -1

  t[:tv_sec].to_f + t[:tv_nsec].to_f / 1_000_000_000
end