Class: Locky

Inherits:
Object
  • Object
show all
Defined in:
lib/locky.rb,
lib/locky/version.rb

Defined Under Namespace

Classes: Error

Constant Summary collapse

VERSION = 
'0.0.3'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, storage = {}) ⇒ Locky

Returns a new instance of Locky.



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# File 'lib/locky.rb', line 15

def initialize(name, storage={})
  @name = name
  @storage = storage
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/locky.rb', line 13

def name
  @name
end

Instance Method Details

#lock(process) ⇒ Object

Raises:



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# File 'lib/locky.rb', line 20

def lock(process)
  raise Error, self if locked? && locked_by != process
  register process
  begin
    yield
  ensure
    unregister
  end
end

#lock!(process) ⇒ Object

Raises:



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

def lock!(process)
  raise Error, self if locked?
  lock(process) { yield }
end

#locked? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/locky.rb', line 40

def locked?
  storage.key? name
end

#locked_by ⇒ Object 



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# File 'lib/locky.rb', line 44

def locked_by
  storage[name]
end

#unlock! ⇒ Object 



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# File 'lib/locky.rb', line 35

def unlock!
  storage.delete name
  storage.delete counter
end