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std::counting_semaphore<LeastMaxValue>:: max

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std::counting_semaphore
constexpr std:: ptrdiff_t max ( ) noexcept ;
(自 C++20 起)

返回内部计数器的最大可能值，该值大于或等于 LeastMaxValue 。

返回值

内部计数器的最大可能值，以 std::ptrdiff_t 表示。

注释

对于特化版本 binary_semaphore ， LeastMaxValue 等于 1 。

正如其名称所示， LeastMaxValue 是 最小 最大值，而非 实际 最大值。因此 max ( ) 可能返回大于 LeastMaxValue 的数值。