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gh-117514: Add sys._is_gil_enabled() function (#118514)

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The function returns `True` or `False` depending on whether the GIL is
currently enabled. In the default build, it always returns `True`
because the GIL is always enabled.
This commit is contained in:
Sam Gross 2024-05-03 11:09:57 -04:00 • committed by GitHub
parent 24e643d4ef
commit 2dae505e87
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GPG key ID: B5690EEEBB952194
5 changed files with 67 additions and 1 deletions
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30
Python/clinic/sysmodule.c.h generated
View file

@ -1485,6 +1485,34 @@ exit:
return return_value;
}
PyDoc_STRVAR(sys__is_gil_enabled__doc__,
"_is_gil_enabled($module, /)\n"
"--\n"
"\n"
"Return True if the GIL is currently enabled and False otherwise.");
#define SYS__IS_GIL_ENABLED_METHODDEF \
{"_is_gil_enabled", (PyCFunction)sys__is_gil_enabled, METH_NOARGS, sys__is_gil_enabled__doc__},
static int
sys__is_gil_enabled_impl(PyObject *module);
static PyObject *
sys__is_gil_enabled(PyObject *module, PyObject *Py_UNUSED(ignored))
{
PyObject *return_value = NULL;
int _return_value;
_return_value = sys__is_gil_enabled_impl(module);
if ((_return_value == -1) && PyErr_Occurred()) {
goto exit;
}
return_value = PyBool_FromLong((long)_return_value);
exit:
return return_value;
}
#ifndef SYS_GETWINDOWSVERSION_METHODDEF
#define SYS_GETWINDOWSVERSION_METHODDEF
#endif /* !defined(SYS_GETWINDOWSVERSION_METHODDEF) */
@ -1528,4 +1556,4 @@ exit:
#ifndef SYS_GETANDROIDAPILEVEL_METHODDEF
#define SYS_GETANDROIDAPILEVEL_METHODDEF
#endif /* !defined(SYS_GETANDROIDAPILEVEL_METHODDEF) */
/*[clinic end generated code: output=518424ee03e353b0 input=a9049054013a1b77]*/
/*[clinic end generated code: output=352ac7a0085e8a1f input=a9049054013a1b77]*/

20
Python/sysmodule.c
View file

@ -2393,6 +2393,25 @@ sys__get_cpu_count_config_impl(PyObject *module)
return config->cpu_count;
}
/*[clinic input]
sys._is_gil_enabled -> bool
Return True if the GIL is currently enabled and False otherwise.
[clinic start generated code]*/
static int
sys__is_gil_enabled_impl(PyObject *module)
/*[clinic end generated code: output=57732cf53f5b9120 input=7e9c47f15a00e809]*/
{
#ifdef Py_GIL_DISABLED
PyInterpreterState *interp = _PyInterpreterState_GET();
return interp->ceval.gil->enabled;
#else
return 1;
#endif
}
static PerfMapState perf_map_state;
PyAPI_FUNC(int) PyUnstable_PerfMapState_Init(void) {
@ -2565,6 +2584,7 @@ static PyMethodDef sys_methods[] = {
SYS__STATS_DUMP_METHODDEF
#endif
SYS__GET_CPU_COUNT_CONFIG_METHODDEF
SYS__IS_GIL_ENABLED_METHODDEF
{NULL, NULL} // sentinel
};