Contents

module Tins
  module Once
    include File::Constants

    module_function

    def only_once(lock_filename = nil, locking_constant = nil)
      lock_filename ||= $0
      locking_constant ||= LOCK_EX
      f = File.new(lock_filename, RDONLY)
      f.flock(locking_constant) and yield
    ensure
      if f
        f.flock LOCK_UN
        f.close
      end
    end

    def try_only_once(lock_filename = nil, locking_constant = nil, &block)
      only_once(lock_filename, locking_constant || LOCK_EX | LOCK_NB, &block)
    end
  end
end

require 'tins/alias'

Version data entries

176 entries across 158 versions & 9 rubygems

Version	Path
tins-1.4.1	lib/tins/once.rb
tins-1.4.0	lib/tins/once.rb
tins-1.3.5	lib/tins/once.rb
tins-1.3.4	lib/tins/once.rb
tins-1.3.3	lib/tins/once.rb
tins-1.3.2	lib/tins/once.rb
tins-1.3.1	lib/tins/once.rb
tins-1.3.0	lib/tins/once.rb
tins-1.2.0	lib/tins/once.rb
tins-1.1.0	lib/tins/once.rb
tins-1.0.1	lib/tins/once.rb
tins-1.0.0	lib/tins/once.rb
tins-0.13.2	lib/tins/once.rb
social_url_stats-0.0.1	vendor/ruby/1.9.1/gems/tins-0.13.1/lib/tins/once.rb
tins-0.13.1	lib/tins/once.rb
tins-0.13.0	lib/tins/once.rb
tins-0.12.0	lib/tins/once.rb
tins-0.11.0	lib/tins/once.rb
tins-0.10.0	lib/tins/once.rb
tins-0.9.0	lib/tins/once.rb