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Diffstat (limited to 'Include/internal/pycore_interp.h')
| -rw-r--r-- | Include/internal/pycore_interp.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/Include/internal/pycore_interp.h b/Include/internal/pycore_interp.h index ae2a3d3..068b0a7 100644 --- a/Include/internal/pycore_interp.h +++ b/Include/internal/pycore_interp.h @@ -123,6 +123,25 @@ struct _is { // sys.modules dictionary PyObject *modules; + /* This is the list of module objects for all legacy (single-phase init) + extension modules ever loaded in this process (i.e. imported + in this interpreter or in any other). Py_None stands in for + modules that haven't actually been imported in this interpreter. + + A module's index (PyModuleDef.m_base.m_index) is used to look up + the corresponding module object for this interpreter, if any. + (See PyState_FindModule().) When any extension module + is initialized during import, its moduledef gets initialized by + PyModuleDef_Init(), and the first time that happens for each + PyModuleDef, its index gets set to the current value of + a global counter (see _PyRuntimeState.imports.last_module_index). + The entry for that index in this interpreter remains unset until + the module is actually imported here. (Py_None is used as + a placeholder.) Note that multi-phase init modules always get + an index for which there will never be a module set. + + This is initialized lazily in _PyState_AddModule(), which is also + where modules get added. */ PyObject *modules_by_index; // Dictionary of the sys module PyObject *sysdict; |