std::atomic_flag::clear - cppreference.com (original) (raw)
| Defined in header | ||
|---|---|---|
| void clear( std::memory_order order = std::memory_order_seq_cst ) volatile noexcept; | (1) | (since C++11) |
| void clear( std::memory_order order = std::memory_order_seq_cst ) noexcept; | (2) | (since C++11) |
Atomically changes the state of a std::atomic_flag to clear (false).
If order is one of std::memory_order_consume, std::memory_order_acquire and std::memory_order_acq_rel, the behavior is undefined.
[edit] Parameters
| order | - | the memory synchronization ordering |
|---|
[edit] Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 2138 | C++11 | order could be std::memory_order_consume | the behavior is undefined in this case |