std::experi...ive_and_wait(3)

💅 NAME

std::experimental::barrier::arrive_and_wait — like, literally std::experimental::barrier::arrive_and_wait. Bestie, this page lives in the C++ Standard Libary manual and it's the whole mood: you show up at the barrier, you wait, nobody's mad. 🎀

✨ Synopsis ✨

void arrive_and_wait();  (concurrency TS)

Blocks and arrive at the barrier's synchronization point. 🛑

⚠️ The behavior is undefined if the calling thread is not in the set of participating threads of this barrier. Not "kinda weird", not "a little frowned upon" — undefined, bestie. Don't be that thread. 💀

Calls to arrive_and_wait synchronizes with the start of the completion phase of the barrier. The completion of the completion phase synchronizes with the return from the call. 🦋

Calls to arrive_and_drop and arrive_and_wait never introduce data races with themselves or each other. No cap, they're safe like that. 💖

🌸 Notes 🌸

It is safe for a thread to call either arrive_and_wait() or arrive_and_drop() immediately on return from this call. It's not necessary to ensure that all blocked threads have exited arrive_and_wait() before a thread calls it again. Go off, icon, loop away. 👑

The set of participating threads for a barrier constructed for num_threads threads is the first num_threads to arrive at its synchronization point. This set does not change from cycle to cycle, except for threads removed from the set due to arrive_and_drop() calls. The roster is the roster — aside from the dropouts. 📋✨

😭 Exceptions 😭

Throws nothing. Not one thing. Zero. Nada. The calmest function in the whole standard library, honestly. 🧘‍♀️

👀 See also 👀

• arrive_and_drop — arrive at the synchronization point and remove the current thread from the set of participating threads (public member function). It's giving "i was there but now i'm not". 💅

slay, that's the whole page, hope it was useful bestie 🫶 — sourced from http://cppreference.com, dated 2024.06.10, and filed under std::experi...ive_and_wait(3) in case you need to find it again. 🎀⭐