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https://github.com/python/cpython
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c2627d6eea
This PR adds the ability to enable the GIL if it was disabled at interpreter startup, and modifies the multi-phase module initialization path to enable the GIL when loading a module, unless that module's spec includes a slot indicating it can run safely without the GIL. PEP 703 called the constant for the slot `Py_mod_gil_not_used`; I went with `Py_MOD_GIL_NOT_USED` for consistency with gh-104148. A warning will be issued up to once per interpreter for the first GIL-using module that is loaded. If `-v` is given, a shorter message will be printed to stderr every time a GIL-using module is loaded (including the first one that issues a warning).
69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
/*
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* C extensions module to test importing multiple modules from one compiled
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* file (issue16421). This file defines 3 modules (_testimportmodule,
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* foo, bar), only the first one is called the same as the compiled file.
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*/
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#include "pyconfig.h" // Py_GIL_DISABLED
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#ifndef Py_GIL_DISABLED
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# define Py_LIMITED_API 0x030d0000
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#endif
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#include <Python.h>
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static PyModuleDef_Slot shared_slots[] = {
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{Py_mod_multiple_interpreters, Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED},
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{Py_mod_gil, Py_MOD_GIL_NOT_USED},
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{0, NULL},
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};
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static struct PyModuleDef _testimportmultiple = {
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PyModuleDef_HEAD_INIT,
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"_testimportmultiple",
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"_testimportmultiple doc",
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0,
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NULL,
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shared_slots,
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NULL,
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NULL,
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NULL
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};
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PyMODINIT_FUNC PyInit__testimportmultiple(void)
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{
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return PyModuleDef_Init(&_testimportmultiple);
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}
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static struct PyModuleDef _foomodule = {
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PyModuleDef_HEAD_INIT,
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"_testimportmultiple_foo",
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"_testimportmultiple_foo doc",
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0,
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NULL,
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shared_slots,
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NULL,
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NULL,
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NULL
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};
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PyMODINIT_FUNC PyInit__testimportmultiple_foo(void)
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{
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return PyModuleDef_Init(&_foomodule);
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}
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static struct PyModuleDef _barmodule = {
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PyModuleDef_HEAD_INIT,
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"_testimportmultiple_bar",
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"_testimportmultiple_bar doc",
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0,
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NULL,
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shared_slots,
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NULL,
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NULL,
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NULL
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};
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PyMODINIT_FUNC PyInit__testimportmultiple_bar(void){
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return PyModuleDef_Init(&_barmodule);
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}
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