"p44utils" is a set of free (opensource, GPLv3) C++ utility classes and functions for creating single-threaded, mainloop event based applications, mainly targeted at linux deamons for automation.

"p44utils" have been developed as part of the vdcd project (a digitalSTROM virtual device container daemon), but are of more generic use, and thus have been separated from the vdcd repository (and made vdcd and other tools use p44utils as a submodule)

"p44utils" makes very light use of boost (intrusive_ptr, bind), and has some classes that use mongoose, sqlitepp, json-c.

p44utils are meant to be included as .cpp and .hpp files into a project and compiled together with the project's other sources. The repository does not contain or directly reference any external dependencies (sqlitepp etc.) some of the classes have. If you use classes that have dependenices, you need to include these in your main project.

p44utils are licensed under the GPLv3 License (see COPYING).

If that's a problem for your particular application, I am open to provide a commercial license, please contact me at luz@plan44.ch.

• common base class implementing a reference counted memory management model via boost intrusive_ptr (more efficient and easier to use than shared_ptr)
• Mainloop as central event dispatcher, supports timers, I/O based events and idle handlers.
• Application base class implementing command line parsing, option handling and usage message formatting
• logging with loglevels, efficiently avoiding disabled log levels to waste CPU time
• support for using unix file descriptors with the I/O based mainloop events
• helper classes for serial line communication
• helper class for socket communication
• helper class for socket based generic JSON and JSON RPC 2 protocols
• wrapper class for json-c JSON objects
• helper class for implementing persistent storage of parameters for object trees with automatic schema updating
• wrappers to abstract various sources of digital and analog inputs (such as GPIO and I2C peripherals) into easy to use input or output objects, including debouncing for inputs and blinking sequences for indicator outputs.
• other stuff :-)

(c) 2013-2015 by Lukas Zeller / plan44.ch