std::atomic_flag::test_and_set
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. This operation is a read-modify-write operation. Memory is affected according to the value of order.
Parameters
| order | - | the memory synchronization order |
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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