# \[ANN\] Ruby-VPI 21.0.0 **URL:** \ **Category:** Ruby\ **Created:** [June 9, 2008, 1:01am UTC](https://www.ruby-forum.com/t/ann-ruby-vpi-21-0-0/139913 "2008-06-09T01:01:01Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![snk](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/d9b06d/32.png) [@snk](https://www.ruby-forum.com/u/snk)\ **Post date:** [June 9, 2008, 1:01am UTC](https://www.ruby-forum.com/t/ann-ruby-vpi-21-0-0/139913/1 "2008-06-09T01:01:01Z")
Ruby-VPI is a Ruby interface to IEEE 1364-2005 Verilog VPI and a platform for unit testing, rapid prototyping, and systems integration of Verilog modules through Ruby. It lets you create complex Verilog test benches easily and wholly in Ruby. ``` http://ruby-vpi.rubyforge.org ``` ########################################################### Ruby-VPI 21.0.0 This release adds support for Ruby 1.9.0 and, in an awesome twist of fate, breaks compatibility[1] with Cadence NC-Sim while restoring compatibility with Mentor Modelsim. 1 Caution Cadence NC-Sim is not compatible with this release. 2 Improvements • Added support for Ruby 1.9.0 by replacing the pthreads-based relay implementation with a simpler that uses rb\_create\_thread() for stack decoupling and Ruby’s thread-safe Queue class for synchronization. See this[2] blog entry for details about the implementation. ``` One side benefit of this change is that it restored support for Mentor Modelsim. On the other hand, it also broke support[1] for Cadence NC-Sim, as mentioned above. ``` • The POSIX threads library (pthreads) is no longer required by Ruby-VPI. 3 Repairs The pipelined ALU example (one of my homework assignments which motivated the creation of Ruby-VPI) has been removed because it was buggy. Farewell, old friend! [1] [http://ruby-vpi.rubyforge.org/#problem.ncsim](http://ruby-vpi.rubyforge.org/#problem.ncsim) [2] [http://snk.rubyforge.org/web/2008-03-31-ruby-1-9-support-c-extension-breakthrough.html](http://snk.rubyforge.org/web/2008-03-31-ruby-1-9-support-c-extension-breakthrough.html)