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Ractor::TVar

Software transactional memory implementation for Ractor and Thread on Ruby 3.0.

require 'ractor/tvar'

tv = Ractor::TVar.new(0)

N = 10_000

r = Ractor.new tv do |tv|
  N.times do
    Ractor.atomically do
      tv.value += 1
    end
   end
end

N.times do
  Ractor.atomically do
    tv.value += 1
  end
end

r.take # wait for the ractor

p tv.value #=> 20000 (= N * 2)

This script shows that there is no race between ractors.

Installation

You need recent Ruby 3.0 (development).

Add this line to your application's Gemfile:

gem 'ractor-tvar'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install ractor-tvar

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test-unit to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/ko1/ractor-tvar.

License

The gem is available as open source under the terms of the MIT License.

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