* 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>
