Use PyEval_InitThreads() as intended (#4350)

* Use `PyEval_InitThreads()` as intended (actually matters only for Python 3.6).

* Add `if defined(WITH_THREAD)` condition.

https://docs.python.org/3.6/c-api/init.html#c.PyEval_InitThreads

> This function is not available when thread support is disabled at compile time.

* Fix oversight pointed out by @EricCousineau-TRI: Remove condition that is always false.
This commit is contained in:
Ralf W. Grosse-Kunstleve 2022-11-22 15:14:49 -08:00 committed by GitHub
parent 296615ad34
commit 48949222c6
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2 changed files with 3 additions and 3 deletions

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@ -468,9 +468,6 @@ PYBIND11_NOINLINE internals &get_internals() {
internals_ptr = new internals(); internals_ptr = new internals();
#if defined(WITH_THREAD) #if defined(WITH_THREAD)
# if PY_VERSION_HEX < 0x03090000
PyEval_InitThreads();
# endif
PyThreadState *tstate = PyThreadState_Get(); PyThreadState *tstate = PyThreadState_Get();
if (!PYBIND11_TLS_KEY_CREATE(internals_ptr->tstate)) { if (!PYBIND11_TLS_KEY_CREATE(internals_ptr->tstate)) {
pybind11_fail("get_internals: could not successfully initialize the tstate TSS key!"); pybind11_fail("get_internals: could not successfully initialize the tstate TSS key!");

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@ -118,6 +118,9 @@ inline void initialize_interpreter(bool init_signal_handlers = true,
#if PY_VERSION_HEX < 0x030B0000 #if PY_VERSION_HEX < 0x030B0000
Py_InitializeEx(init_signal_handlers ? 1 : 0); Py_InitializeEx(init_signal_handlers ? 1 : 0);
# if defined(WITH_THREAD) && PY_VERSION_HEX < 0x03070000
PyEval_InitThreads();
# endif
// Before it was special-cased in python 3.8, passing an empty or null argv // Before it was special-cased in python 3.8, passing an empty or null argv
// caused a segfault, so we have to reimplement the special case ourselves. // caused a segfault, so we have to reimplement the special case ourselves.