René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add a C API to assign a new version to a PyTypeObject","articleBody":"# Feature or enhancement\r\n\r\nI would like to add an API function like this:\r\n```\r\n/* Attempt to assign a version tag to the given type.\r\n *\r\n * Returns 1 if the type already had a valid version tag or a new one was\r\n * assigned, or 0 if a new tag could not be assigned.\r\n */\r\nPyAPI_FUNC(int) _PyType_AssignVersionTag(PyTypeObject* type);\r\n```\r\n\r\nIt would be a thin wrapper around the existing [`assign_version_tag`](https://github.com/python/cpython/blob/main/Objects/typeobject.c#L568-L599) function, and is modeled after a similar function we added to Cinder as part of https://github.com/facebookincubator/cinder/commit/43c4e2dfe0e4a967251a72468adfc6602011dbda.\r\n\r\n# Pitch\r\n\r\nCinder (and possibly other JITs or optimizing interpreters) would benefit from being able to ensure that type has a valid version tag without having to call `_PyType_Lookup()` just for the version-assigning side-effect. We rely on notifications from `PyType_Modified()` to invalidate code in our JIT when types change, and this only works when the types in question have valid version tags.\r\n\r\n# Previous discussion\r\n\r\nThere's no written discussion I'm aware of, but @carljm and @markshannon have discussed this offline.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-103095\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/swtaarrs","@type":"Person","name":"swtaarrs"},"datePublished":"2023-03-28T18:20:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":10},"url":"https://github.com/103091/cpython/issues/103091"}