std::atomic::operators (int)
STd：：原子：：运算符++，++%28 int%29，-，-%28 int%29
| T operator++( T operator++() volatile; | (1) | (member only of atomic |
|---|---|---|
| T* operator++( T* operator++() volatile; | (1) | (member only of atomic<T*> template specialization)(since C++11) |
| T operator++( int T operator++( int ) volatile; | (2) | (member only of atomic<Integral> template specialization)(since C++11) |
| T* operator++( int T* operator++( int ) volatile; | (2) | (member only of atomic<T*> template specialization)(since C++11) |
| T operator--( T operator--() volatile; | (3) | (member only of atomic<Integral> template specialization)(since C++11) |
| T* operator--( T* operator--() volatile; | (3) | (member only of atomic<T*> template specialization)(since C++11) |
| T operator--( int T operator--( int ) volatile; | (4) | (member only of atomic<Integral> template specialization)(since C++11) |
| T* operator--( int T* operator--( int ) volatile; | (4) | (member only of atomic<T*> template specialization)(since C++11) |
以原子方式增加或减少当前值。操作是读-修改-写操作.
1%29执行原子前增量.。相当于fetch_add(1)+1...
2%29执行原子后增量.。相当于fetch_add(1)...
3%29执行原子预减量.。相当于fetch_sub(1)-1
4%29执行原子后减量.。相当于fetch_sub(1)...
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
%280%29
返回值
修改后原子变量的值为1，3%29。形式上，在紧接此函数的效果之前的修改顺序成*this...
修改前原子变量的值为2，4%，29。形式上，此函数的效果之前的值在修改顺序成*this...
例外
noexcept规格：
noexcept
注记
与大多数预增量和预减量操作符不同，原子类型的预增量和预减量运算符不返回对修改对象的引用。它们返回存储值的副本。
另见
| fetch_add | atomically adds the argument to the value stored in the atomic object and obtains the value held previously (public member function) |
|---|---|
| fetch_sub | atomically subtracts the argument from the value stored in the atomic object and obtains the value held previously (public member function) |
| operator+=operator-=operator&=operator|=operator^= | adds, subtracts, or performs bitwise AND, OR, XOR with the atomic value (public member function) |
© cppreference.com
在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。
