/usr/lib/ruby/vendor_ruby/celluloid/uuid.rb is in ruby-celluloid 0.16.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | require 'securerandom'
module Celluloid
# Clearly Ruby doesn't have enough UUID libraries
# This one aims to be fast and simple with good support for multiple threads
# If there's a better UUID library I can use with similar multithreaded
# performance, I certainly wouldn't mind using a gem for this!
module UUID
values = SecureRandom.hex(9).match(/(.{8})(.{4})(.{3})(.{3})/)
PREFIX = "#{values[1]}-#{values[2]}-4#{values[3]}-8#{values[4]}".freeze
BLOCK_SIZE = 0x10000
@counter = 0
@counter_mutex = Mutex.new
def self.generate
thread = Thread.current
unless thread.uuid_limit
@counter_mutex.synchronize do
block_base = @counter
@counter += BLOCK_SIZE
thread.uuid_counter = block_base
thread.uuid_limit = @counter - 1
end
end
counter = thread.uuid_counter
if thread.uuid_counter >= thread.uuid_limit
thread.uuid_counter = thread.uuid_limit = nil
else
thread.uuid_counter += 1
end
"#{PREFIX}-#{sprintf("%012x", counter)}".freeze
end
end
end
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