p1_utils is an application containing ProcessOne modules and tools that are leveraged in other development projects:

• p1_fsm and p1_server are drop-in replacements of Erlang gen_fsm and gen_server, offering extra option for better reliability in production. They support mostly priority messages and message queue length controls.
• p1_nif_utils is an helper utilities for handling NIF code.
• treap is a treap algorithm implementation. It is a randomized binary search tree. See: https://en.wikipedia.org/wiki/Treap
• p1_time_compat is a module to ease support and migration of Erlang time management function from Erlang R16/R17 to Erlang R18.

If you have rebar binary, you can generate p1_utils documentation by running rebar3 edoc.