Contents

# frozen_string_literal: true

# (The MIT License)
#
# Copyright (c) 2018 Yegor Bugayenko
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the 'Software'), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

require 'socket'

module RandomPort
  # Pool of TPC ports.
  # Author:: Yegor Bugayenko ([e-mail])
  # Copyright:: Copyright (c) 2018 Yegor Bugayenko
  # License:: MIT
  class Pool
    def initialize
      @ports = []
      @mutex = Mutex.new
    end

    # Application wide pool of ports
    SINGLETON = Pool.new

    def acquire
      @mutex.synchronize do
        loop do
          server = TCPServer.new('127.0.0.1', 0)
          port = server.addr[1]
          server.close
          next if @ports.include?(port)
          @ports << port
          return port unless block_given?
          yield port
          @ports.delete(port)
          break
        end
      end
    end

    def release(port)
      @mutex.synchronize do
        @ports.delete(port)
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
random-port-0.2.0	lib/random-port/pool.rb