ParaSail (programming language)
Parallel Specification and Implementation Language (ParaSail) is an object-oriented parallel programming language. Its design and ongoing implementation is described in a blog and on its official website.
Logo for ParaSail Programming Language | |
| Paradigm | compiled, concurrent, imperative, structured, object-oriented |
|---|---|
| Designed by | S. Tucker Taft |
| Developer | AdaCore |
| First appeared | 2009 |
| Stable release | 9.3
/ 6 June 2021 |
| Typing discipline | strong, static |
| Platform | x86 |
| OS | Linux, macOS, Windows |
| License | GPL v3 |
| Filename extensions | .psi, .psl |
| Website | parasail-lang |
| Major implementations | |
| psli, pslc | |
| Influenced by | |
| Modula, Ada, Pascal, ML | |
| Influenced | |
| Nim | |
ParaSail uses a pointer-free programming model, where objects can grow and shrink, and value semantics are used for assignment. It has no global garbage collected heap. Instead, region-based memory management is used throughout. Types can be recursive, so long as the recursive components are declared optional. There are no global variables, no parameter aliasing, and all subexpressions of an expression can be evaluated in parallel. Assertions, preconditions, postconditions, class invariants, etc., are part of the standard syntax, using a Hoare-like notation. Any possible race conditions are detected at compile time.
Initial design of ParaSail began in September 2009, by S. Tucker Taft.
Both an interpreter using the ParaSail virtual machine, and an LLVM-based ParaSail compiler are available. Work stealing is used for scheduling ParaSail's light-weight threads. The latest version can be downloaded from the ParaSail website.