111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup pythonintern
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*
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* This file inserts an exit callback into Python's 'atexit' module.
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* Without this `sys.exit()` can crash because blender is not properly closing
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* resources.
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*/
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#include <Python.h>
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#include "bpy.hh" /* own include */
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#include "bpy_capi_utils.hh"
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#include "WM_api.hh"
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static PyObject *bpy_atexit(PyObject * /*self*/, PyObject * /*args*/, PyObject * /*kw*/)
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{
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/* NOTE(@ideasman42): This doesn't have to match Blender shutting down exactly,
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* leaks reported by memory checking tools may be reported but are harmless
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* and don't have to be *fixed* unless doing so is trivial.
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*
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* Just handle the basics:
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* - Free resources avoiding crashes and errors on exit.
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* - Remove Blender's temporary directory.
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*
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* Anything else that prevents `sys.exit(..)` from exiting gracefully should be handled here too.
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*/
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bContext *C = BPY_context_get();
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/* As Python requested the exit, it handles shutting itself down. */
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const bool do_python_exit = false;
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/* User actions such as saving the session, preferences, recent-files for e.g.
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* should be skipped because an explicit call to exit is more likely to be used as part of
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* automated processes shouldn't impact the users session in the future. */
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const bool do_user_exit_actions = false;
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WM_exit_ex(C, do_python_exit, do_user_exit_actions);
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Py_RETURN_NONE;
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}
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#ifdef __GNUC__
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# ifdef __clang__
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# pragma clang diagnostic push
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# pragma clang diagnostic ignored "-Wcast-function-type"
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# else
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# pragma GCC diagnostic push
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# pragma GCC diagnostic ignored "-Wcast-function-type"
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# endif
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#endif
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static PyMethodDef meth_bpy_atexit = {"bpy_atexit", (PyCFunction)bpy_atexit, METH_NOARGS, nullptr};
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#ifdef __GNUC__
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# ifdef __clang__
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# pragma clang diagnostic pop
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# else
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# pragma GCC diagnostic pop
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# endif
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#endif
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static PyObject *func_bpy_atregister = nullptr; /* borrowed reference, `atexit` holds. */
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static void atexit_func_call(const char *func_name, PyObject *atexit_func_arg)
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{
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/* NOTE(@ideasman42): no error checking, if any of these fail we'll get a crash
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* this is intended, but if its problematic it could be changed. */
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PyObject *atexit_mod = PyImport_ImportModuleLevel("atexit", nullptr, nullptr, nullptr, 0);
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PyObject *atexit_func = PyObject_GetAttrString(atexit_mod, func_name);
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PyObject *args = PyTuple_New(1);
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PyObject *ret;
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PyTuple_SET_ITEM(args, 0, atexit_func_arg);
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Py_INCREF(atexit_func_arg); /* only incref so we don't dec'ref along with 'args' */
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ret = PyObject_CallObject(atexit_func, args);
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Py_DECREF(atexit_mod);
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Py_DECREF(atexit_func);
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Py_DECREF(args);
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if (ret) {
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Py_DECREF(ret);
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}
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else { /* should never happen */
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PyErr_Print();
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}
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}
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void BPY_atexit_register()
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{
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/* atexit module owns this new function reference */
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BLI_assert(func_bpy_atregister == nullptr);
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func_bpy_atregister = (PyObject *)PyCFunction_New(&meth_bpy_atexit, nullptr);
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atexit_func_call("register", func_bpy_atregister);
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}
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void BPY_atexit_unregister()
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{
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BLI_assert(func_bpy_atregister != nullptr);
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atexit_func_call("unregister", func_bpy_atregister);
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func_bpy_atregister = nullptr; /* don't really need to set but just in case */
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}
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