mirror of
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).
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
// _sysconfig provides data for the Python sysconfig module
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#ifndef Py_BUILD_CORE_BUILTIN
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# define Py_BUILD_CORE_MODULE 1
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#endif
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#include "Python.h"
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#include "pycore_importdl.h" // _PyImport_DynLoadFiletab
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#include "pycore_long.h" // _PyLong_GetZero, _PyLong_GetOne
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/*[clinic input]
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module _sysconfig
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=0a7c02d3e212ac97]*/
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#include "clinic/_sysconfig.c.h"
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#ifdef MS_WINDOWS
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static int
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add_string_value(PyObject *dict, const char *key, const char *str_value)
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{
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PyObject *value = PyUnicode_FromString(str_value);
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if (value == NULL) {
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return -1;
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}
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int err = PyDict_SetItemString(dict, key, value);
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Py_DECREF(value);
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return err;
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}
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#endif
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/*[clinic input]
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_sysconfig.config_vars
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Returns a dictionary containing build variables intended to be exposed by sysconfig.
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[clinic start generated code]*/
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static PyObject *
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_sysconfig_config_vars_impl(PyObject *module)
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/*[clinic end generated code: output=9c41cdee63ea9487 input=391ff42f3af57d01]*/
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{
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PyObject *config = PyDict_New();
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if (config == NULL) {
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return NULL;
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}
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#ifdef MS_WINDOWS
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if (add_string_value(config, "EXT_SUFFIX", PYD_TAGGED_SUFFIX) < 0) {
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Py_DECREF(config);
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return NULL;
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}
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if (add_string_value(config, "SOABI", PYD_SOABI) < 0) {
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Py_DECREF(config);
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return NULL;
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}
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#endif
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#ifdef Py_GIL_DISABLED
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PyObject *py_gil_disabled = _PyLong_GetOne();
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#else
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PyObject *py_gil_disabled = _PyLong_GetZero();
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#endif
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if (PyDict_SetItemString(config, "Py_GIL_DISABLED", py_gil_disabled) < 0) {
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Py_DECREF(config);
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return NULL;
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}
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return config;
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}
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PyDoc_STRVAR(sysconfig__doc__,
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"A helper for the sysconfig module.");
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static struct PyMethodDef sysconfig_methods[] = {
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_SYSCONFIG_CONFIG_VARS_METHODDEF
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{NULL, NULL}
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};
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static PyModuleDef_Slot sysconfig_slots[] = {
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{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_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 PyModuleDef sysconfig_module = {
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.m_base = PyModuleDef_HEAD_INIT,
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.m_name = "_sysconfig",
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.m_doc = sysconfig__doc__,
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.m_methods = sysconfig_methods,
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.m_slots = sysconfig_slots,
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};
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PyMODINIT_FUNC
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PyInit__sysconfig(void)
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{
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return PyModuleDef_Init(&sysconfig_module);
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}
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