std::atomic...:notify_all(3)

✨ NAME ✨

okay so bestie, welcome to std::atomic...:notify_all(3) from the C++ Standard Libary manual 💅 — the actual star of the page is std::atomic_flag::notify_all. That’s the name, that’s the vibe, periodt.

🌸 Synopsis 🌸

void notify_all() noexcept;          (1) (since C++20)
void notify_all() volatile noexcept; (2) (since C++20)

It performs atomic notifying operations ✨

What does that mean? It unblocks all threads that are blocked in atomic waiting operations (i.e. wait()) on *this, if there are any; otherwise it does nothing. Literally nothing. A whole lot of nothing. 🫶

🦋 Return value 🦋

(none) — yep, it returns absolutely nothing, and that’s iconic of it.

🎀 Notes 🎀

This form of change-detection is often more efficient than simple polling or pure spinlocks. No cap, that’s the note. 💖

😭 Example 😭

This section is incomplete.

Reason: no example 🫠

🔥 See also 🔥

• wait — blocks the thread until notified and the atomic value changes. (C++20) (public member function)
• atomic_flag_wait — (C++20)
• atomic_flag_wait_explicit — blocks the thread until notified and the flag changes. (C++20) (function)
• atomic_flag_notify_one — notifies a thread blocked in atomic_flag_wait. (C++20) (function)

🧚 Category 🧚

• Todo no example

mwah 💋 this page is from http://cppreference.com, version/date 2024.06.10, and its footer title is std::atomic...:notify_all(3). Slay. 🌈👑