2.6、compare_exchange_weak函数 2.7、compare_exchange_strong函数 2.8、专业化支持的操作 三、使用示例 总结 一、简介 C++中原子变量(atomic)是一种多线程编程中常用的同步机制,它能够确保对共享变量的操作在执行时不会被其他线程的操作干扰,从而避免竞态条件(race condition)和死锁(deadlock)等问题。 原子变量可以看...
1. 函数原型: bool __atomic_compare_exchange_n(type *ptr,type*expected,typedesired, bool weak, int success_memorder, int failure_memorder) 函数说明: his built-in function implements an atomic compare and exchange operation. This compares the contents of*ptrwith the contents of*expected. If e...
exchange():原子地替换原子对象的值。 compare_exchange_weak() 和compare_exchange_strong():条件性原子地替换原子对象的值。 这些操作都保证了在多线程环境中对共享数据的安全访问。 3.2.3 使用原子类型的优势 使用原子类型的主要优势是它们的操作不需要额外的锁定机制即可在多线程环境中安全运行。这降低了死锁的风...
atomic_compare_exchange_weak_explicit (Atomic operations) - C 中文开发手册 在头文件<stdatomic.h>中定义 _Bool atomic_compare_exchange_strong(volatile A * obj,C * expected,C desired); (1) (自C11以来) _Bool atomic_compare_exchange_weak(volatile A * obj,C * expected,C desired); (...
compare_exchange_weak compare_exchange_strong boolcompare_exchange_weak( T& expected, T desired, std::memory_order success, std::memory_order failure )noexcept;boolcompare_exchange_weak( T& expected, T desired, std::memory_order success, ...
C11标准(ISO/IEC 9899:2011): 7.17.7.4 atomic_compare_exchange通用函数(p: 283-284) 另请参阅 atomic_exchangeatomic_exchange_explicit(C11)用原子对象(函数)的值交换一个值 | C ++文档:atomic_compare_exchange_weak,atomic_compare_exchange_strong,atomic_compare_exchange_weak_explicit,atomic_compare_exchang...
_Bool atomic_compare_exchange_weak( volatile A *obj, C* expected, C desired ); (2) (C11 起) _Bool atomic_compare_exchange_strong_explicit( volatile A* obj, C* expected, C desired, memory_order succ, memory_order fail ); (3) (C11 起) _Bool atomic_compare_exchange_weak_expl...
compare [kəmˈpeə(r)] vt. 比较, 对照 compass [ˈkʌmpəs] n. 罗盘, 指南针 compensate [ˈkɔmpenseɪt] v. 补偿, 弥补 compete [kəmˈpiːt] vi. 比赛, 竞赛 competence [ˈkɔmpətəns] n.能力,胜任...
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atomic_compare_exchange_weak 文章/答案/技术大牛搜索 搜索关闭 发布 搜索 Bootstrap 4 Bootstrap 3 C 算法| Algorithms 原子操作 | Atomic operations Atomic operations library ATOMIC_*_LOCK_FREE atomic_compare_exchange_strong atomic_compare_exchange_strong_explicit...