与atomic_compare_exchange_strong 不同,weak版本的 compare-and-exchange 操作允许(spuriously 地)返回 false(即原子对象所封装的值与参数expected的物理内容相同,但却仍然返回 false),不过在某些需要循环操作的算法下这是可以接受的,并且在一些平台下 compare_exchange_weak 的性能更好 。如果 atomic_compare_exchange_...
std::memory_order_seq_cst )noexcept;boolcompare_exchange_strong( T& expected, T desired, std::memory_order order = std::memory_order_seq_cst )volatilenoexcept; 而compare_exchange_weak和compare_exchange_strong则是著名的CAS(compare and set)。参数会要求在这里传入期待的数值和新的数值。它们对比变量...
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); (...
_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...
atomic_compare_exchange_strong_explicit 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...
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exchange…with…意为“用…交换…”。男人说,既然你们相信我,那你们愿意用自己的孩子来做交换(exchange)吗?由下文中人们的沉默可知,男人是想要人们用自己的孩子来做交换。compare 意为“比较”,take 意为“带走”,treat 意为“对待”,均不符合题意。故正确答案为A。2013年郑州市高中毕业年级第一次质量预测:英语...
static inline int opal_atomic_trylock(opal_atomic_lock_t *lock) { int32_t unlocked = OPAL_ATOMIC_LOCK_UNLOCKED; bool ret = opal_atomic_compare_exchange_strong_acq_32(lock, &unlocked, OPAL_ATOMIC_LOCK_LOCKED); return (ret == false) ? 1 : 0; } I don't see a memory barrier there...
解析:选C 作者打算用AND来代替它(指BUT)。substitute“(用……)代替,取代”,符合语境。connect“连接”;compare“对比,比较”;exchange“交换;交流”。 Ⅱ.任务型阅读 (2019·南通、泰州模拟)Climate change has had a big impact on the timing of river floods across Europe over the past 50 years, accord...