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std::counting_semaphore<LeastMaxValue>:: counting_semaphore

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std::counting_semaphore
constexpr explicit counting_semaphore ( std:: ptrdiff_t desired ) ;
(1) (自 C++20 起)
counting_semaphore ( const counting_semaphore & ) = delete ;
(2) (自 C++20 起)
1) 构造一个 std::counting_semaphore 类型的对象，其内部计数器初始化为 desired 。
2) 复制构造函数被删除。

前置条件

1) 同时满足 desired >= 0 和 desired <= max ( ) 的条件为 true 。

参数

desired - 用于初始化 counting_semaphore 计数器的值

异常

不抛出任何异常。