std::atomic_flag::test_and_set
STD：：原子[医]旗子：：测试[医]和[医]集
| Defined in header | | |
|---|---|---|
| bool test_and_set(std::memory_order order = std::memory_order_seq_cst) volatile; | (1) | (since C++11) |
| bool test_and_set(std::memory_order order = std::memory_order_seq_cst | (2) | (since C++11) |
原子地更改std::atomic_flag设置%28true%29并返回它以前持有的值。
参数
| order | - | the memory synchronization ordering for this operation |
|---|
例外
noexcept规格：
noexcept
另见
| clear | atomically sets flag to false (public member function) |
|---|---|
| atomic_flag_test_and_setatomic_flag_test_and_set_explicit (C++11)(C++11) | atomically sets the flag to true and returns its previous value (function) |
| memory_order (C++11) | defines memory ordering constraints for the given atomic operation (typedef) |
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