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require 'concurrent/synchronization'
module Concurrent
class_definition = Class.new(Synchronization::LockableObject) do
def initialize
@last_time = Time.now.to_f
super()
end
if defined?(Process::CLOCK_MONOTONIC)
# @!visibility private
def get_time
Process.clock_gettime(Process::CLOCK_MONOTONIC)
end
elsif Concurrent.on_jruby?
# @!visibility private
def get_time
java.lang.System.nanoTime() / 1_000_000_000.0
end
else
# @!visibility private
def get_time
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
end
# Clock that cannot be set and represents monotonic time since
# some unspecified starting point.
#
# @!visibility private
GLOBAL_MONOTONIC_CLOCK = class_definition.new
private_constant :GLOBAL_MONOTONIC_CLOCK
# @!macro monotonic_get_time
#
# Returns the current time a tracked by the application monotonic clock.
#
# @return [Float] The current monotonic time since some unspecified
# starting point
#
# @!macro monotonic_clock_warning
def monotonic_time
GLOBAL_MONOTONIC_CLOCK.get_time
end
module_function :monotonic_time
end
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