The Real-Time Priority Inheritance Library (librtpi) is intended to bridge the gap between the glibc pthread implementation and a functionally correct priority inheritance for pthread locking primitives, such as pthread_mutex and pthread_condvar.

Specifically, priority based wakeup is required for correct operation, in contrast to the more time-based ordered wakeup groups in the glibc pthread condvar implementation.

A C library with C++ bindings is provided.