Class: Ro::Lock
- Inherits:
-
Object
- Object
- Ro::Lock
- Defined in:
- lib/ro/lock.rb
Instance Method Summary collapse
-
#initialize(path) ⇒ Lock
constructor
A new instance of Lock.
- #lock(&block) ⇒ Object
- #lock! ⇒ Object
- #open! ⇒ Object
- #unlock! ⇒ Object
Constructor Details
#initialize(path) ⇒ Lock
Returns a new instance of Lock.
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# File 'lib/ro/lock.rb', line 3 def initialize(path) @path = path.to_s @fd = false end |
Instance Method Details
#lock(&block) ⇒ Object
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# File 'lib/ro/lock.rb', line 8 def lock(&block) open! if block begin lock! block.call ensure unlock! end else self end end |
#lock! ⇒ Object
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# File 'lib/ro/lock.rb', line 43 def lock! open! @fd.flock File::LOCK_EX end |
#open! ⇒ Object
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# File 'lib/ro/lock.rb', line 23 def open! @fd ||= ( fd = begin open(@path, 'ab+') rescue unless test(?e, @path) FileUtils.mkdir_p(@path) FileUtils.touch(@path) end open(@path, 'ab+') end fd.close_on_exec = true fd ) end |
#unlock! ⇒ Object
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# File 'lib/ro/lock.rb', line 48 def unlock! open! @fd.flock File::LOCK_UN end |