New submission from STINNER Victor <vstin...@python.org>:
Similarly to bpo-39573 (PyObject) and bpo-40170 (PyTypeObject), I propose to make the PyGC_Head structure opaque in the C API. See https://bugs.python.org/issue39573#msg361513 for the rationale. In short, my plan is to hide all implementation details from the C API. The PyGC_Head structure caused ABI issues recently: bpo-39599 "ABI breakage between Python 3.7.4 and 3.7.5: change in PyGC_Head structure". Making the structure opaque would reduce the risk of such ABI issue. In fact, the reporter of bpo-39599 really require to access PyGC_Head structure to write a profiler, so this issue doesn't fix all use cases, but it should benefit to most people ;-) PyGC_Head structure will remain accessible via the internal C API which doesn't provide any backward compatibility warranty. ---------- components: C API messages: 366064 nosy: vstinner priority: normal severity: normal status: open title: [C API] Make PyGC_Head structure opaque, or even more it to the internal C API versions: Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40241> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
