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fix: allow subinterp support to be disabled

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Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>
This commit is contained in:
Henry Schreiner
2025-05-30 21:11:27 -04:00
committed by Henry Schreiner
parent 33fb53335e
commit e4873e8f59
8 changed files with 23 additions and 11 deletions
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10
include/pybind11/detail/common.h
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@@ -256,9 +256,13 @@
// Slightly faster code paths are available when PYBIND11_HAS_SUBINTERPRETER_SUPPORT is *not*
// defined, so avoid defining it for implementations that do not support subinterpreters. However,
// defining it unnecessarily is not expected to break anything.
#if PY_VERSION_HEX >= 0x030C0000 && !defined(PYPY_VERSION) && !defined(GRAALVM_PYTHON)
# define PYBIND11_HAS_SUBINTERPRETER_SUPPORT
// defining it unnecessarily is not expected to break anything (other than old iOS targets).
#ifndef PYBIND11_HAS_SUBINTERPRETER_SUPPORT
# if PY_VERSION_HEX >= 0x030C0000 && !defined(PYPY_VERSION) && !defined(GRAALVM_PYTHON)
# define PYBIND11_HAS_SUBINTERPRETER_SUPPORT 1
# else
# define PYBIND11_HAS_SUBINTERPRETER_SUPPORT 0
# endif
#endif
// 3.12 Compatibility

2
include/pybind11/detail/internals.h
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@@ -324,7 +324,7 @@ inline std::atomic<int> &get_num_interpreters_seen() {
template <typename InternalsType>
inline std::unique_ptr<InternalsType> *&get_internals_pp() {
#ifdef PYBIND11_HAS_SUBINTERPRETER_SUPPORT
#if PYBIND11_HAS_SUBINTERPRETER_SUPPORT
if (get_num_interpreters_seen() > 1) {
// Internals is one per interpreter. When multiple interpreters are alive in different
// threads we have to allow them to have different internals, so we need a thread_local.

2
include/pybind11/subinterpreter.h
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@@ -15,7 +15,7 @@
#include <stdexcept>
#if !defined(PYBIND11_HAS_SUBINTERPRETER_SUPPORT)
#if !PYBIND11_HAS_SUBINTERPRETER_SUPPORT
# error "This platform does not support subinterpreters, do not include this file."
#endif