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std::atomic_flag:: test

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C++
Concurrency support library
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Atomic types
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Initialization of atomic types
(C++11) (deprecated in C++20)
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Memory ordering
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Free functions for atomic operations
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Free functions for atomic flags
(C++11) (C++11)
(C++11) (C++11)
(C++20) (C++20)
(C++20) (C++20)
(C++20)
(C++20)
std::atomic_flag
bool test ( std:: memory_order order =
std:: memory_order_seq_cst ) const volatile noexcept ;
(1) (自 C++20 起)
bool test ( std:: memory_order order =
std:: memory_order_seq_cst ) const noexcept ;
(2) (自 C++20 起)

原子地读取 * this 的值并返回该值。

如果 order 是 std:: memory_order_release 和 std:: memory_order_acq_rel 之一，则行为未定义。

目录

参数

order - 内存同步顺序

返回值

原子读取的值。

示例

本节内容不完整
原因：缺少示例

参见

(C++20) (C++20)
原子地返回标志的值
(函数)