/usr/local/lib/swipl/library/ext/pengines/pengines.pl
All Application Manual Name SummaryHelp

 prepare_module(+Module, +Application, +Options) is semidet[multifile, library(pengines)]
Hook, called to initialize the temporary private module that provides the working context of a pengine. This hook is executed by the pengine's thread. Preparing the source consists of three steps:
  1. Add Application as (first) default import module for Module
  2. Call this hook
  3. Compile the source provided by the the src_text and src_url options
Arguments:
Module- is a new temporary module (see in_temporary_module/3) that may be (further) prepared by this hook.
Application- (also a module) associated to the pengine.
Options- is passed from the environment and should (currently) be ignored.