NAME¶

std::counting_semaphore::try_acquire_for - std::counting_semaphore::try_acquire_for

Synopsis¶

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

Tries to atomically decrement the internal counter by 1 if it is greater than 0;
otherwise blocks until it is greater than 0 and can successfully decrement the
internal counter, or the rel_time duration has been exceeded.

Preconditions¶

(none)

Parameters¶

rel_time - the minimum duration the function must wait for it to fail

Return value¶

true if it decremented the internal counter, otherwise false.

Exceptions¶

May throw std::system_error or a timeout-related exception.

Notes¶

In practice the function may take longer than rel_time to fail.

See also¶

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