std::counting_semaphore<LeastMaxValue>::try_acquire_until
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C++
Concurrency support library
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std::counting_semaphore
| Member functions | ||||
| Operations | ||||
counting_semaphore::try_acquire_until | ||||
| Constants | ||||
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template
<
class Clock, class Duration >
bool try_acquire_until( const std::chrono::time_point <Clock, Duration> & abs_time ) ; |
(since C++20) | |
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 abs_time
The programs is ill-formed if std::chrono::is_clock_v <Clock> is false
Preconditions
Clock meets the Clock requirements.
Parameters
| abs_time | - | the earliest time the function must wait until in order 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 abs_time to fail.
See also
| increments the internal counter and unblocks acquirers (public member function) |
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| decrements the internal counter or blocks until it can (public member function) |
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| tries to decrement the internal counter without blocking (public member function) |
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| tries to decrement the internal counter, blocking for up to a duration time (public member function) |