py_with_gil/1

Availability::- use_module(library(janus)).(can be autoloaded)

[semidet]py_with_gil(:Goal)

Run Goal as once(Goal) while holding the Phyton GIL (Global Interpreter Lock). Note that py_call/1,2 also locks the GIL. This predicate is only required if we wish to make multiple calls to Python while keeping the GIL. The GIL is a recursive lock and thus calling py_call/1,2 while holding the GIL does not deadlock.