cpython/Include/cpython/pylifecycle.h

#ifndef Py_CPYTHON_PYLIFECYCLE_H
#  error "this header file must not be included directly"
#endif

/* Py_FrozenMain is kept out of the Limited API until documented and present
   in all builds of Python */
PyAPI_FUNC(int) Py_FrozenMain(int argc, char **argv);

/* PEP 432 Multi-phase initialization API (Private while provisional!) */

PyAPI_FUNC(PyStatus) Py_PreInitialize(
    const PyPreConfig *src_config);
PyAPI_FUNC(PyStatus) Py_PreInitializeFromBytesArgs(
    const PyPreConfig *src_config,
    Py_ssize_t argc,
    char **argv);
PyAPI_FUNC(PyStatus) Py_PreInitializeFromArgs(
    const PyPreConfig *src_config,
    Py_ssize_t argc,
    wchar_t **argv);


/* Initialization and finalization */

PyAPI_FUNC(PyStatus) Py_InitializeFromConfig(
    const PyConfig *config);

// Python 3.8 provisional API (PEP 587)
PyAPI_FUNC(PyStatus) _Py_InitializeMain(void);

PyAPI_FUNC(int) Py_RunMain(void);


PyAPI_FUNC(void) _Py_NO_RETURN Py_ExitStatusException(PyStatus err);

PyAPI_FUNC(int) Py_FdIsInteractive(FILE *, const char *);

/* --- PyInterpreterConfig ------------------------------------ */

#define PyInterpreterConfig_DEFAULT_GIL …
#define PyInterpreterConfig_SHARED_GIL …
#define PyInterpreterConfig_OWN_GIL …

PyInterpreterConfig;

#define _PyInterpreterConfig_INIT …

// gh-117649: The free-threaded build does not currently support single-phase
// init extensions in subinterpreters. For now, we ensure that
// `check_multi_interp_extensions` is always `1`, even in the legacy config.
#ifdef Py_GIL_DISABLED
#define _PyInterpreterConfig_LEGACY_CHECK_MULTI_INTERP_EXTENSIONS …
#else
#define _PyInterpreterConfig_LEGACY_CHECK_MULTI_INTERP_EXTENSIONS …
#endif

#define _PyInterpreterConfig_LEGACY_INIT …

PyAPI_FUNC(PyStatus) Py_NewInterpreterFromConfig(
    PyThreadState **tstate_p,
    const PyInterpreterConfig *config);

atexit_datacallbackfunc;
PyAPI_FUNC(int) PyUnstable_AtExit(
        PyInterpreterState *, atexit_datacallbackfunc, void *);