root@ubuntu:~/c++# g++ -std=c++11weak.cpp -o weak -pthread root@ubuntu:~/c++# ./weak29282723262524222120191817161514131211109876543210root@ubuntu:~/c++# 在看c++11的CAS用法的时候,主要是产生了两个问题: compare_swap_strong 与 compare_swap_weak 有啥区别? c++11 CAS原语系列后面还有两个memory_order参...
expected-reference to the value expected to be found in the object referenced by theatomic_refobject desired-the value to store in the referenced object if it is as expected success-the memory synchronization ordering for the read-modify-write operation if the comparison succeeds ...
cppreference.com 创建账户 页面 讨论 变换 查看 编辑 历史 std::atomic<T>::compare_exchange_weak, std::atomic<T>::compare_exchange_strong C++ 并发支持库 std::atomic bool compare_exchange_weak( T& expected, T desired, std::memory_order success, std::memory_order failure ) noexcept; (1)...
泛型函数的名字是宏还是声明有外部链接的标识符是未指定的。若为访问实际函数而压制宏定义(例如像(atomic_compare_exchange)(...)这样加括号),或程序定义了拥有泛型函数名的外部标识符,则行为未定义。 参数 obj-指向要测试及修改的原子对象的指针 expected-指向期待在原子对象中找到的值的指针 ...
expected-reference to the value expected to be found in the atomic object desired-the value to store in the atomic object if it is as expected success-the memory synchronization ordering for the read-modify-write operation if the comparison succeeds ...
原子性（Atomicity）：一个操作或者多个操作，要么全部执行并且执行的过程不会被任何因素打断，要么就都不...
From http://en.cppreference.com/w/cpp/atomic/atomic/compare_exchange : "The weak forms (1-2) of the functions are allowed to fail spuriously, that is, act as if *this != expected even if they are equal. " I see that effect with MTR tests on an ARM64 machine, which is failing ...
修复需要两个不同的过期的weak_ptr在compare_exchange期间可靠地相互比较相等。 std::weak_ptr 没有相等运算符,因此其文档对此保持沉默。我能找到的关于 std::atomic<> 专业化的文档(例如 CPPReference)都没有描述指针过期时比较交换的行为。我不知道它是否恰好适用于我的特定编译器,或者 C++ 标准是否保证它。
设置环境变量时 -bash: export: ` ': not a valid identifier不多说，直接上代码 localBranch=$(git...
#include <atomic> template<class T> struct node { T data; node* next; node(const T& data) : data(data), next(nullptr) {} }; template<class T> class stack {std::atomic<node<T>*> head; public: void push(const T& data) { node<T>* new_node = new node<T>(data); // 将 ...