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std:: atomic_load, std:: atomic_load_explicit

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atomic_load atomic_load_explicit
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定义于头文件 <atomic>
template < class T >
T atomic_load ( const std:: atomic < T > * obj ) noexcept ;
(1) (C++11 起)
template < class T >
T atomic_load ( const volatile std:: atomic < T > * obj ) noexcept ;
(2) (C++11 起)
template < class T >

T atomic_load_explicit ( const std:: atomic < T > * obj,

std:: memory_order order ) noexcept ;
(3) (C++11 起)
template < class T >

T atomic_load_explicit ( const volatile std:: atomic < T > * obj,

std:: memory_order order ) noexcept ;
(4) (C++11 起)
1,2) 以原子方式获取 obj 所指向的值，如同通过 obj - > load ( ) 执行。
3,4) 原子地获取 obj 所指向的值，如同通过 obj - > load ( order ) 执行。
如果 order 是 std:: memory_order_release 和 std:: memory_order_acq_rel 其中之一，则行为未定义。

参数

obj - 指向要修改的原子对象的指针
order - 此操作的内存同步顺序

返回值

原子对象所持有的值，该原子对象由 obj 指向。

参见

原子地获取原子对象的值
( std::atomic<T> 的公开成员函数)
(C++11) (C++11)
原子地以非原子参数替换原子对象的值
(函数模板)
(C++11)
为给定的原子操作定义内存顺序约束
(枚举)
(C++20 中弃用) (C++26 中移除)
为 std::shared_ptr 特化的原子操作
(函数模板)
C 文档 关于 atomic_load , atomic_load_explicit