32 Concurrency support library [thread]

32.7 Condition variables [thread.condition]

32.7.5 Class condition_variable_any [thread.condition.condvarany]

32.7.5.3 Interruptible waits [thread.condvarany.intwait]

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The following wait functions will be notified when there is a stop request on the passed stop_token.
In that case the functions return immediately, returning false if the predicate evaluates to false.
🔗
template<class Lock, class Predicate> bool wait(Lock& lock, stop_token stoken, Predicate pred);
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Effects: Registers for the duration of this call *this to get notified on a stop request on stoken during this call and then equivalent to: while (!stoken.stop_requested()) { if (pred()) return true; wait(lock); } return pred();
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[Note 1: 
The returned value indicates whether the predicate evaluated to true regardless of whether there was a stop request.
— end note]
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Postconditions: lock is locked by the calling thread.
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Throws: Any exception thrown by pred.
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Remarks: If the function fails to meet the postcondition, terminate is called ([except.terminate]).
[Note 2: 
This can happen if the re-locking of the mutex throws an exception.
— end note]
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template<class Lock, class Clock, class Duration, class Predicate> bool wait_until(Lock& lock, stop_token stoken, chrono::time_point<Clock, Duration> abs_time, Predicate pred);
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Effects: Registers for the duration of this call *this to get notified on a stop request on stoken during this call and then equivalent to: while (!stoken.stop_requested()) { if (pred()) return true; if (wait_until(lock, abs_time) == cv_status::timeout) return pred(); } return pred();
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[Note 3: 
There is no blocking if pred() is initially true, stoken.stop_requested() was already true or the timeout has already expired.
— end note]
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[Note 4: 
The returned value indicates whether the predicate evaluated to true regardless of whether the timeout was triggered or a stop request was made.
— end note]
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Postconditions: lock is locked by the calling thread.
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Throws: Timeout-related exceptions ([thread.req.timing]), or any exception thrown by pred.
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Remarks: If the function fails to meet the postcondition, terminate is called ([except.terminate]).
[Note 5: 
This can happen if the re-locking of the mutex throws an exception.
— end note]
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template<class Lock, class Rep, class Period, class Predicate> bool wait_for(Lock& lock, stop_token stoken, chrono::duration<Rep, Period> rel_time, Predicate pred);
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Effects: Equivalent to: return wait_until(lock, std::move(stoken), chrono::steady_clock::now() + rel_time, std::move(pred));