/usr/lib/ruby/1.9.1/mutex_m.rb is in libruby1.9.1 1.9.3.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# mutex_m.rb -
# $Release Version: 3.0$
# $Revision: 1.7 $
# Original from mutex.rb
# by Keiju ISHITSUKA(keiju@ishitsuka.com)
# modified by matz
# patched by akira yamada
#
# --
# Usage:
# require "mutex_m.rb"
# obj = Object.new
# obj.extend Mutex_m
# ...
# extended object can be handled like Mutex
# or
# class Foo
# include Mutex_m
# ...
# end
# obj = Foo.new
# this obj can be handled like Mutex
#
require 'thread'
module Mutex_m
def Mutex_m.define_aliases(cl)
cl.module_eval %q{
alias locked? mu_locked?
alias lock mu_lock
alias unlock mu_unlock
alias try_lock mu_try_lock
alias synchronize mu_synchronize
}
end
def Mutex_m.append_features(cl)
super
define_aliases(cl) unless cl.instance_of?(Module)
end
def Mutex_m.extend_object(obj)
super
obj.mu_extended
end
def mu_extended
unless (defined? locked? and
defined? lock and
defined? unlock and
defined? try_lock and
defined? synchronize)
Mutex_m.define_aliases(singleton_class)
end
mu_initialize
end
# locking
def mu_synchronize(&block)
@_mutex.synchronize(&block)
end
def mu_locked?
@_mutex.locked?
end
def mu_try_lock
@_mutex.try_lock
end
def mu_lock
@_mutex.lock
end
def mu_unlock
@_mutex.unlock
end
def sleep(timeout = nil)
@_mutex.sleep(timeout)
end
private
def mu_initialize
@_mutex = Mutex.new
end
def initialize(*args)
mu_initialize
super
end
end
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