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Contents
# encoding: UTF-8
#
# Author: Stefano Harding <riddopic@gmail.com>
# License: Apache License, Version 2.0
# Copyright: (C) 2014-2015 Stefano Harding
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
module Garcon
# Clock that cannot be set and represents monotonic time since
# some unspecified starting point.
# @!visibility private
GLOBAL_MONOTONIC_CLOCK = Class.new {
if defined?(Process::CLOCK_MONOTONIC)
# @!visibility private
def get_time
Process.clock_gettime(Process::CLOCK_MONOTONIC)
end
else
require 'thread'
# @!visibility private
def initialize
@mutex = Mutex.new
@last_time = Time.now.to_f
end
# @!visibility private
def get_time
@mutex.synchronize do
now = Time.now.to_f
if @last_time < now
@last_time = now
else # clock has moved back in time
@last_time += 0.000_001
end
end
end
end
}.new
private_constant :GLOBAL_MONOTONIC_CLOCK
# @!macro [attach] monotonic_get_time
#
# Returns the current time a tracked by the application monotonic clock.
#
# @return [Float] The current monotonic time when `since` not given else
# the elapsed monotonic time between `since` and the current time
#
# @!macro monotonic_clock_warning
def monotonic_time
GLOBAL_MONOTONIC_CLOCK.get_time
end
module_function :monotonic_time
end
Version data entries
10 entries across 10 versions & 1 rubygems