Class: FlockMutex

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

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ FlockMutex

Returns a new instance of FlockMutex.



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# File 'lib/flock_mutex.rb', line 2

def initialize(path)
  @file = File.open(path, 'a')
end

Instance Method Details

#lock ⇒ Object 



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# File 'lib/flock_mutex.rb', line 6

def lock
  @file.flock(File::LOCK_EX)
  self
end

#locked? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/flock_mutex.rb', line 23

def locked?
  File.open(@file.path, 'a') do |f|
    ! f.flock(File::LOCK_EX | File::LOCK_NB)
  end
end

#synchronize ⇒ Object 



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# File 'lib/flock_mutex.rb', line 16

def synchronize
  lock
  yield
ensure
  unlock
end

#unlock ⇒ Object 



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# File 'lib/flock_mutex.rb', line 11

def unlock
  @file.flock(File::LOCK_UN)
  self
end