std::counting_semaphore<LeastMaxValue>::try_acquire_for

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std::counting_semaphore

Member functions
counting_semaphore::counting_semaphore
counting_semaphore::~counting_semaphore
Operations
counting_semaphore::release
counting_semaphore::acquire
counting_semaphore::try_acquire
counting_semaphore::try_acquire_for
counting_semaphore::try_acquire_until
Constants
counting_semaphore::max

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template<class Rep,class Period> bool try_acquire_for(conststd::chrono::duration<Rep, Period>& rel_time);		(since C++20)

Tries to atomically decrement the internal counter by1 if it is greater than0; otherwise blocks until it is greater than0 and can successfully decrement the internal counter, or therel_time duration has been exceeded.

[edit]Preconditions

(none)

[edit]Parameters

rel_time

theminimum duration the function must wait for it to fail

[edit]Return value

true if it decremented the internal counter, otherwisefalse.

[edit]Exceptions

May throwstd::system_error or a timeout-related exception.

[edit]Notes

In practice the function may take longer thanrel_time to fail.

[edit]See also

release	increments the internal counter and unblocks acquirers (public member function)[edit]
acquire	decrements the internal counter or blocks until it can (public member function)[edit]
try_acquire	tries to decrement the internal counter without blocking (public member function)[edit]
try_acquire_until	tries to decrement the internal counter, blocking until a point in time (public member function)[edit]