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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
1.7 KiB
C
69 lines
1.7 KiB
C
#include "Python.h"
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#include "clinic/_contextvarsmodule.c.h"
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/*[clinic input]
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module _contextvars
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=a0955718c8b8cea6]*/
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/*[clinic input]
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_contextvars.copy_context
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[clinic start generated code]*/
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static PyObject *
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_contextvars_copy_context_impl(PyObject *module)
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/*[clinic end generated code: output=1fcd5da7225c4fa9 input=89bb9ae485888440]*/
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{
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return PyContext_CopyCurrent();
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}
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PyDoc_STRVAR(module_doc, "Context Variables");
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static PyMethodDef _contextvars_methods[] = {
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_CONTEXTVARS_COPY_CONTEXT_METHODDEF
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{NULL, NULL}
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};
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static int
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_contextvars_exec(PyObject *m)
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{
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if (PyModule_AddType(m, &PyContext_Type) < 0) {
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return -1;
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}
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if (PyModule_AddType(m, &PyContextVar_Type) < 0) {
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return -1;
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}
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if (PyModule_AddType(m, &PyContextToken_Type) < 0) {
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return -1;
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}
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return 0;
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}
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static struct PyModuleDef_Slot _contextvars_slots[] = {
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{Py_mod_exec, _contextvars_exec},
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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 struct PyModuleDef _contextvarsmodule = {
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PyModuleDef_HEAD_INIT, /* m_base */
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"_contextvars", /* m_name */
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module_doc, /* m_doc */
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0, /* m_size */
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_contextvars_methods, /* m_methods */
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_contextvars_slots, /* m_slots */
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NULL, /* m_traverse */
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NULL, /* m_clear */
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NULL, /* m_free */
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};
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PyMODINIT_FUNC
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PyInit__contextvars(void)
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{
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return PyModuleDef_Init(&_contextvarsmodule);
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}
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