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Contents
# typed: ignore
# Copyright (c) 2015 Sqreen. All Rights Reserved.
# Please refer to our terms for more information: https://www.sqreen.com/terms.html
require 'sqreen/backport'
module Sqreen
module Backport
module ClockGettime
class << self
def supported?
Process.respond_to?(:clock_gettime)
end
end
unless supported?
require 'ffi'
class Timespec < FFI::Struct
layout :tv_sec => :time_t, :tv_nsec => :long
end
module LibC
extend FFI::Library
ffi_lib FFI::Library::LIBC
# TODO: FFI::NotFoundError
if RUBY_PLATFORM =~ /darwin/
attach_function :mach_absolute_time, [], :uint64
end
attach_function :clock_gettime, [:int, :pointer], :int
end
module Constants
case RUBY_PLATFORM
when /darwin/
CLOCK_REALTIME = 0
CLOCK_MONOTONIC = 6
CLOCK_PROCESS_CPUTIME_ID = 12
CLOCK_THERAD_CPUTIME_ID = 16
when /linux/
CLOCK_REALTIME = 0
CLOCK_MONOTONIC = 1
CLOCK_PROCESS_CPUTIME_ID = 2
CLOCK_THREAD_CPUTIME_ID = 3
end
end
def clock_gettime(clock_id, unit = :float_second)
unless unit == :float_second
raise "Process.clock_gettime: unsupported unit #{unit.inspect}"
end
t = Timespec.new
ret = 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
end
end
end
end
unless Sqreen::Backport::ClockGettime.supported?
Process.instance_eval do
extend Sqreen::Backport::ClockGettime
include Sqreen::Backport::ClockGettime::Constants
end
end
Version data entries
10 entries across 10 versions & 1 rubygems