std::atomic_flag::test_and_set
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< cpp | atomic | atomic flag
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std::atomic_flag
Member functions
atomic_flag::test_and_set
(C++20)
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Defined in header
<atomic>
bool test_and_set( std::memory_order order =
std::memory_order_seq_cst ) volatile noexcept;
(1)
(since C++11)
std::memory_order_seq_cst ) volatile noexcept;
bool test_and_set( std::memory_order order =
std::memory_order_seq_cst ) noexcept;
(2)
(since C++11)
std::memory_order_seq_cst ) noexcept;
Atomically changes the state of a std::atomic_flag to set (true) and returns the value it held before.
[edit] Parameters
order
-
the memory synchronization order