JackCpp is a couple c++ classes which wrap the Jack audio io api and lock-free ring buffer. It was written by Alex Norman. The documentation includes some text taken directly from the JACK Audio Connection Kit API reference by Paul Davis (and others).
Copyright Alex Norman, GNU GPL licence Version 3.
JackCpp is available here: JackCpp webpage. There you will find the source code as well as some brief examples.
1.7.1