NAME¶

std::atomic_flag::test_and_set - std::atomic_flag::test_and_set

Synopsis¶

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

Parameters¶

order - the memory synchronization order

See also¶

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