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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"_PyOS_SigintEvent() is needed for interruptible waiting on main thread","articleBody":"# Bug report\n\n### Bug description:\n\nMoved from https://github.com/python/cpython/pull/108605#issuecomment-2521215855\n\nIn https://github.com/python/cpython/pull/108605, `_PyOS_SigintEvent` was removed from the public headers.\n\nTensorStore relies on that function here: https://github.com/google/tensorstore/blob/eda046b10158e7d82fdb0f23aeecdfdeb8ac5aa3/python/tensorstore/future.cc#L105 to enable synchronously blocking on the readiness of a custom Future type while allowing Ctrl+C to interrupt when running on the main thread.\n\nThe current workaround is to manually declare the function since the symbol is still available.\n\nI'm not aware of a usable alternative.  Since `signal.set_wakeup_fd` only allows a single fd to be set globally, it isn't usable from a library.  The best alternative would probably be to poll by waking up every few hundred milliseconds.\n\n\n### CPython versions tested on:\n\n3.13\n\n### Operating systems tested on:\n\n_No response_","author":{"url":"https://github.com/jbms","@type":"Person","name":"jbms"},"datePublished":"2025-01-09T17:16:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/128684/cpython/issues/128684"}