std::atomic_flag::test_and_set

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

Atomically changes the state of a std::atomic_flag to set (true) and returns the value it held before.

Parameters

order - the memory synchronization ordering for this operation


See also

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