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# std::atomic_flag::clear

From cppreference.com
< cpp‎ | atomic‎ | atomic flag

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

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

### [edit] 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)

### [edit] Exceptions

`noexcept` specification:
noexcept

### [edit] See also

test_and_set | atomically sets the flag to true and obtains its previous value (public member function) [edit]
atomic_flag_clear atomic_flag_clear_explicit (C++11)(C++11) | atomically sets the value of the flag to false (function) [edit]
memory_order (C++11) | defines memory ordering constraints for the given atomic operation (typedef) [edit]

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