std::atomic_flag::clear

 

C++

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Free functions for atomic flags atomic_flag_test_and_setatomic_flag_test_and_set_explicit (C++11)(C++11) atomic_flag_clearatomic_flag_clear_explicit (C++11)(C++11) atomic_flag_testatomic_flag_test_explicit (C++20)(C++20) atomic_flag_waitatomic_flag_wait_explicit (C++20)(C++20) atomic_flag_notify_one (C++20) atomic_flag_notify_all (C++20) Memory ordering memory_order (C++11) kill_dependency (C++11) atomic_thread_fence (C++11) atomic_signal_fence (C++11) Mutual exclusion mutex (C++11) recursive_mutex (C++11) shared_mutex (C++17) timed_mutex (C++11) recursive_timed_mutex (C++11) shared_timed_mutex (C++14) Generic lock management lock_guard (C++11) scoped_lock (C++17) unique_lock (C++11) shared_lock (C++14) defer_lock_ttry_to_lock_tadopt_lock_t (C++11)(C++11)(C++11) lock (C++11) try_lock (C++11) defer_locktry_to_lockadopt_lock (C++11)(C++11)(C++11) once_flag (C++11) call_once (C++11) Condition variables condition_variable (C++11) condition_variable_any (C++11) notify_all_at_thread_exit (C++11) cv_status (C++11) Semaphores counting_semaphorebinary_semaphore (C++20)(C++20) Latches and barriers latch (C++20) barrier (C++20) Futures promise (C++11) future (C++11) shared_future (C++11) packaged_task (C++11) async (C++11) launch (C++11) future_status (C++11) future_error (C++11) future_category (C++11) future_errc (C++11)

 

std::atomic_flag

Member functions

atomic_flag::atomic_flag

atomic_flag::operator=

atomic_flag::clear

atomic_flag::test_and_set

atomic_flag::test (C++20)

atomic_flag::wait (C++20)

atomic_flag::notify_one (C++20)

atomic_flag::notify_all (C++20)

 

Defined in header <atomic>
void clear( std::memory_order order = std::memory_order_seq_cst ) volatile noexcept;	(1)	(since C++11)
void clear( std::memory_order order = std::memory_order_seq_cst ) noexcept;	(2)	(since C++11)

Atomically changes the state of a std::atomic_flag to clear (false).

Parameters

order

-

the memory synchronization ordering for this operation (cannot be std::memory_order_consume, std::memory_order_acquire, or std::memory_order_acq_rel)

See also

test_and_set	atomically sets the flag to true and obtains its previous value (public member function)
atomic_flag_clearatomic_flag_clear_explicit (C++11)(C++11)	atomically sets the value of the flag to false (function)
memory_order (C++11)	defines memory ordering constraints for the given atomic operation (enum)