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 boolcompare_exchange_weak(T&expected, T desired, std::memory_ordersuccess, ...
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 ...
https://en.cppreference.com/w/cpp/atomic/atomic/compare_exchangeen.cppreference.com/w/cpp/atomic/atomic/compare_exchange 及: 【公开课】C++11开始的多线程编程(#5)_哔哩哔哩_bilibiliwww.bilibili.com/video/BV1Ya411q7y4 有: main.cpp #include<iostream>#include<atomic>#include<mutex>templat...
compare_exchange_weakis allowed to fail spuriously, that is, acts as if*this!=expectedeven if they are equal. When a compare-and-exchange is in a loop,compare_exchange_weakwill yield better performance on some platforms. Whencompare_exchange_weakwould require a loop andcompare_exchange_strongwo...
_Bool atomic_compare_exchange_strong_explicit(volatileA*obj, C*expected, C desired, memory_ordersucc, memory_orderfail); (3)(since C11) _Bool atomic_compare_exchange_weak_explicit(volatileA*obj, C*expected, C desired, memory_ordersucc, ...
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开发者ID:CCJY,项目名称:coliru,代码行数:16,代码来源:main.cpp 示例5: thread_2 ▲点赞 1▼ voidthread_2(){intexpected=1;while(!flag.compare_exchange_strong(expected,2,std::memory_order_acq_rel)) { expected =1; } } 开发者ID:CCJY,项目名称:coliru,代码行数:7,代码来源:main.cpp ...
Example from the cppreference also shows that after two calls compare_exchange_strong will succeed.#include <atomic> #include <iostream> std::atomic<int> ai; int tst_val= 4; int new_val= 5; bool exchanged= false; void valsout()
std::atomic_compare_exchange_weak_explicit( &head, &new_node->next, new_node, std::memory_order_release, std::memory_order_relaxed)) ; // 循环体为空 // 注意:上述循环非线程安全,至少在 // 早于 4.8.3 的 GCC ( bug 60272 ),早于 2014-05-05 的 clang ( bug 18899) // 早于 2014...
cppreference.com 创建账户 页面 讨论 变换 查看 编辑 历史 std::atomic_compare_exchange_weak,std::atomic_compare_exchange_strong,std::atomic_compare_exchange_weak_explicit,std::atomic_compare_exchange_strong_explicit C++ 并发支持库 在标头<atomic>定义 ...