Design and Implementation of Concurrent C0

  author    = {Max Willsey and
              Rokhini Prabhu and
              Frank Pfenning},
  title     = {Design and Implementation of Concurrent {C0}},
  booktitle = {Proceedings Fourth International Workshop on Linearity, {LINEARITY}
              2016, Porto, Portugal, 25 June 2016.},
  pages     = {73--82},
  year      = {2016},
  url       = {},
  doi       = {10.4204/EPTCS.238.8},


We describe Concurrent C0, a type-safe C-like language with contracts and session-typed communication over channels. Concurrent C0 supports an operation called forwarding which allows channels to be combined in a well-defined way. The languageā€™s type system enables elegant expression of session types and message-passing concurrent programs. We provide a Go-based implementation with language based optimizations that outperforms traditional message passing techniques.