std::atomic::fetch_sub
? | ? | (since C++11) (member only of atomic<Integral> template specialization) |
|---|---|---|
T fetch_sub( T arg, std::memory_order order = std::memory_order_seq_cst ); | ? | ? |
T fetch_sub( T arg, std::memory_order order = std::memory_order_seq_cst ) volatile; | ? | ? |
? | ? | (since C++11) (member only of atomic<T*> template specialization) |
T* fetch_sub( std::ptrdiff_t arg, std::memory_order order = std::memory_order_seq_cst ); | ? | ? |
T* fetch_sub( std::ptrdiff_t arg, std::memory_order order = std::memory_order_seq_cst ) volatile; | ? | ? |
将当前值替换为值的算术减法结果，arg.操作是读-修改-写操作.。的值影响内存。order...
签名Integral类型，算法定义为使用两种补码表示形式。没有未定义的结果。为T*类型，结果可能是一个未定义的地址，但否则操作就没有未定义的行为。
参数
arg | - | the other argument of arithmetic subtraction |
|---|---|---|
order | - | memory order constraints to enforce |
返回值
中此函数的效果之前的值。修改顺序成*this...
例外
noexcept规格：
noexcept
另见
atomic_fetch_subatomic_fetch_sub_explicit (C++11)(C++11) | subtracts a non-atomic value from an atomic object and obtains the previous value of the atomic (function template) |
|---|
? cppreference.com在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
