atomic_exchange, atomic_exchange_explicit
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| 在头文件 <stdatomic.h> 中定义
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| C atomic_exchange( volatile A* obj, C desired ); |
(1) | |
| C atomic_exchange_explicit( volatile A* obj, C desired, memory_order order ); |
(2) | |
Atomically replaces the value pointed by obj with desired and returns the value obj held previously. The operation is read-modify-write operation. The first version orders memory accesses according to memory_order_seq_cst, the second version orders memory accesses according to order.
这是一个通用函数定义的所有原子的对象类型。
A是一个原子对象的类型，C非原子的类型，对应于A.原文：
This is a 通用函数 defined for all atomic object types.
A is the type of an atomic object, C is the non-atomic type corresponding to A.[编辑] 参数
| obj | - | 指针的原子对象修改
原文： pointer to the atomic object to modify |
| desired | - | the value to replace the atomic object with |
| order | - | 内存同步进行此操作的顺序：所有的允许值
原文： the memory synchronization ordering for this operation: all values are permitted |
[编辑] 返回值
保存的值是原子对象所指向的
obj.原文：
The value held previously be the atomic object pointed to by
obj.[编辑] 另请参阅
| 交换价值的一个原子对象，如果旧值的期望是什么，否则读旧的值 原文： swaps a value with the an atomic object if the old value is what is expected, otherwise reads the old value （函数） | |
| C++ documentation for atomic_exchange, atomic_exchange_explicit
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