μC++, also called uC++, is a programming language, an extension of C++ designed for concurrent programming. Among other features, it adds coroutines, tasks, and monitors, and extends existing language constructs to integrate with them. Its compiler, named u++, operates as a source-to-source translator targeting C++.
μC++ is part of the μSystem project, at the University of Waterloo, Ontario, Canada, a large-scale project led by professor Peter Buhr with the goal to create a "highly-concurrent shared-memory programming system".
It is used in the CS 343 course at the University of Waterloo.
Every μC++ program should include the uC++.h header file before any other header, although this is not necessary for more recent versions. uC++ is now open source, available on GitHub.
The following keywords are implemented in uC++ to provide extended functionality on class implementations, exception handling capabilities, and scheduling:
- _Accept - enables external scheduling within monitors. _Accept allows a caller permission to obtain mutual exclusion over a method within the monitor
- _At - raises a non-local exception at the argument
- _CatchResume - catches an exception but follows the rules of resumption of a caller
- _Monitor - an extension of a C++ class that permits a class to also operate as a monitor
- _Cormonitor - an extension of a C++ class that permits use of a class as both a monitor and a coroutine (using suspension and resumption as well as mutual exclusion)
- _Coroutine - an extension of a C++ class that permits coroutine based functionality
- _Enable - enables non-local exception handling within a task
- _Disable - disables non-local exception handling within a task (default)
- _Mutex - enables mutual exclusion on a class member
- _Nomutex - disables mutual exclusion on a class member
- _Select - allows blocking on wait for access to a future (Future_ISM<T>, Future_ESM<T>)
- _Task - an extension of a C++ class with its own stack and thread control; mutually exclusive by default
- _Throw - allows non local exception throwing
- _When - an argument condition to an accept statement similar to a condition
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