std::latch:: try_wait

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std::latch
bool try_wait ( ) const noexcept ;
(since C++20)

Returns true only if the internal counter has reached zero. This function may spuriously return false with very low probability even if the internal counter has reached zero.

Parameters

(none)

Return value

With very low probability false , otherwise cnt == 0 , where cnt is the value of the internal counter.

Notes

The reason why a spurious result is permitted is to allow implementations to use a memory order more relaxed than std::memory_order_seq_cst .

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