std::atomic_flag::test_and_set (3) Linux Manual Page

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