std::atomic::fetch_sub
STD：：原子：：获取[医]分
| | | (since C++11) (member only of atomic |
|---|---|---|
| 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) |
|---|
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