NbGuard.h

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/*
** Interpreter init without pybind11.
**
** Polarity:
**   * Preferred: Python owns the process (eon-server + pyeonclient).
*Interpreter
**     already exists; ensure_interpreter() is a no-op.
**   * Fallback: standalone eonclient needs a pot that calls into Python (ASE).
**     Use Py_InitializeEx — do NOT depend on pybind11::embed.
**
** Object/array marshalling for pots should use nanobind (nb::object,
*nb::ndarray)
** once the interpreter is up, matching pyeonclient.
*/
#pragma once
 
#include <Python.h>
 
namespace eonc {
 
inline void ensure_interpreter() {
  if (!Py_IsInitialized()) {
    // 0 = skip signal handlers (same idea as pybind11 embed defaults)
    Py_InitializeEx(0);
  }
}
 
} // namespace eonc