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fix: support free-threaded CPython with GIL disabled (#5148)

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* Support free-threaded CPython (PEP 703)

Some additional locking is added in the free-threaded build when
`Py_GIL_DISABLED` is defined:

- Most accesses to internals are protected by a single mutex
- The registered_instances uses a striped lock to improve concurrency

Pybind11 modules can indicate support for running with the GIL disabled
by calling `set_gil_not_used()`.

* refactor: use PYBIND11_MODULE (#11)

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* Address code review

* Suppress MSVC warning

* Changes from review

* style: pre-commit fixes

* `py::mod_gil_not_used()` suggestion.

* Update include/pybind11/pybind11.h

---------

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>
Co-authored-by: Henry Schreiner <HenrySchreinerIII@gmail.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Ralf W. Grosse-Kunstleve <rwgk@google.com>
This commit is contained in:
Sam Gross
2024-06-18 16:54:38 -04:00
committed by GitHub
parent 1961b96a8c
commit baa540ec34
15 changed files with 352 additions and 137 deletions
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4
include/pybind11/numpy.h
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@@ -1553,7 +1553,9 @@ PYBIND11_NOINLINE void register_structured_dtype(any_container<field_descriptor>
auto tindex = std::type_index(tinfo);
numpy_internals.registered_dtypes[tindex] = {dtype_ptr, std::move(format_str)};
get_internals().direct_conversions[tindex].push_back(direct_converter);
with_internals([tindex, &direct_converter](internals &internals) {
internals.direct_conversions[tindex].push_back(direct_converter);
});
}
template <typename T, typename SFINAE>