Concurrent Euclid
A concurrent extension of a subset of
Euclid ("Simple Euclid") developed by J.R. Cordy and R.C. Holt of the University of Toronto in 1980.
It features separate compilation, modules, processes and
monitors,
signal and wait on condition variables, 'converters' to defeat strong type checking, absolute addresses.
All procedures and functions are
re-entrant. TUNIS (a
Unix-like
operating system) is written in Concurrent Euclid.
["Specification of Concurrent Euclid", J.R. Cordy & R.C. Holt, Reports CSRI-115 & CSRI-133, CSRI, U Toronto, Jul 1980, rev. Aug 1981].
["Concurrent Euclid, The Unix System, and Tunis," R.C. Holt, A-W, 1983].