This header is part of thethread support library.
Classes | |
(C++20) | semaphore that models a non-negative resource count (class template)[edit] |
(C++20) | semaphore that has only two states (typedef)[edit] |
namespace std{template<ptrdiff_t LeastMaxValue=/* implementation-defined */>class counting_semaphore; using binary_semaphore= counting_semaphore<1>;}
namespace std{template<ptrdiff_t LeastMaxValue=/* implementation-defined */>class counting_semaphore{public:staticconstexpr ptrdiff_t max()noexcept; constexprexplicit counting_semaphore(ptrdiff_t desired); ~counting_semaphore(); counting_semaphore(const counting_semaphore&)= delete; counting_semaphore& operator=(const counting_semaphore&)= delete; void release(ptrdiff_t update=1);void acquire();bool try_acquire()noexcept;template<class Rep,class Period>bool try_acquire_for(const chrono::duration<Rep, Period>& rel_time);template<class Clock,class Duration>bool try_acquire_until(const chrono::time_point<Clock, Duration>& abs_time); private: ptrdiff_t counter;// exposition only};}
