Notify_one. // condition_variable::notify_one #include // std::cout #include // std::thread #include // std::mutex, std::unique_lock #include. According to cppreference, std::atomic::notify_one () will notify at least one thread that is waiting on said atomic.
If there are ten threads blocked on the condition variable, for example, notify_one() will unblock only one thread, while notify_all() will unblock them all. The effects of notify_one () / notify_all () and each of the three atomic parts of wait () / wait_for () / wait_until () (unlock+wait, wakeup, and lock) take place in a single total order.
I == 1 \N ;
The effects of notify_one()/notify_all() and each of the three atomic parts of wait()/wait_for()/wait_until() (unlock+wait, wakeup, and lock) take place in a single total.
Consider The Following Example From Cppreference
If there is a thread blocked in an atomic waiting operation (i.e.
If There Is A Thread Blocked In Atomic Waiting Operation (I.e.
Images References
(Since C++11) If Any Threads Are Waiting On * This, Calling Notify_One Unblocks One Of The Waiting Threads.
Wait ()) on *this, then unblocks at least one such thread;.
// Condition_Variable
The effects of notify_one () / notify_all () and each of the three atomic parts of wait () / wait_for () / wait_until () (unlock+wait, wakeup, and lock) take place in a single total order.