Module Mutex_m
In: mutex_m.rb
  mutex_m.rb -
      $Release Version: 3.0$
      $Revision: 1.7 $
      $Date: 1998/02/27 04:28:57 $
      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

Methods

Public Class methods

[Source]

# File mutex_m.rb, line 38
  def Mutex_m.append_features(cl)
    super
    define_aliases(cl) unless cl.instance_of?(Module)
  end

[Source]

# File mutex_m.rb, line 28
  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

[Source]

# File mutex_m.rb, line 43
  def Mutex_m.extend_object(obj)
    super
    obj.mu_extended
  end

[Source]

# File mutex_m.rb, line 114
  def initialize(*args)
    mu_initialize
    super
  end

Public Instance methods

[Source]

# File mutex_m.rb, line 48
  def mu_extended
    unless (defined? locked? and
            defined? lock and
            defined? unlock and
            defined? try_lock and
            defined? synchronize)
      Mutex_m.define_aliases(class<<self;self;end)
    end
    mu_initialize
  end

[Source]

# File mutex_m.rb, line 84
  def mu_lock
    while (Thread.critical = true; @mu_locked)
      @mu_waiting.push Thread.current
      Thread.stop
    end
    @mu_locked = true
    Thread.critical = false
    self
  end

[Source]

# File mutex_m.rb, line 69
  def mu_locked?
    @mu_locked
  end

locking

[Source]

# File mutex_m.rb, line 60
  def mu_synchronize
    begin
      mu_lock
      yield
    ensure
      mu_unlock
    end
  end

[Source]

# File mutex_m.rb, line 73
  def mu_try_lock
    result = false
    Thread.critical = true
    unless @mu_locked
      @mu_locked = true
      result = true
    end
    Thread.critical = false
    result
  end

[Source]

# File mutex_m.rb, line 94
  def mu_unlock
    return unless @mu_locked
    Thread.critical = true
    wait = @mu_waiting
    @mu_waiting = []
    @mu_locked = false
    Thread.critical = false
    for w in wait
      w.run
    end
    self
  end

[Validate]