Class: ZenDebugger::Mutex

Inherits:
Object
  • Object
show all
Defined in:
lib/zendebug.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Mutex

Returns a new instance of Mutex.



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# File 'lib/zendebug.rb', line 24

def initialize
  @locker = nil
  @waiting = []
  @locked = false;
end

Instance Method Details

#lock ⇒ Object 



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# File 'lib/zendebug.rb', line 34

def lock
  return if Thread.critical
  return if @locker == Thread.current
  while (Thread.critical = true; @locked)
    @waiting.push Thread.current
    Thread.stop
  end
  @locked = true
  @locker = Thread.current
  Thread.critical = false
  self
end

#locked? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/zendebug.rb', line 30

def locked?
  @locked
end

#unlock ⇒ Object 



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# File 'lib/zendebug.rb', line 47

def unlock
  return if Thread.critical
  return unless @locked
  unless @locker == Thread.current
    raise RuntimeError, "unlocked by other"
  end
  Thread.critical = true
  t = @waiting.shift
  @locked = false
  @locker = nil
  Thread.critical = false
  t.run if t
  self
end