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Select	Paper	Title	Authors	Audience	Doc Date	Mailing Date
	P3255R3	Expose whether atomic notifying operations are lock-free	Brian Bi B. Bi	LWG	2026-09-03	2026-09
Doc Date 2026-09-03 Mailing Date 2026-09 Unassigned Author(s) Brian Bi Target Audience LWG Tracking issue View on GitHub Abstract The atomic notifying functions for `std::atomic_flag` are not always lock-free even though `std::atomic_flag` is specified to always be lock-free. Therefore, use of `std::atomic_flag::notify_one` or `std::atomic_flag::notify_all` may cause unpredictable behavior when called in a signal handler, even though the Standard currently claims that these functions are signal-safe. It would be useful for s

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