atomic_exchangeatomic_exchange_explicit (C++11)(C++11) atomically replaces the value of the atomic object with non-atomic argument and returns the old value of the atomic (function template) std::atomic_compare_exchange_weak(std::shared_ptr) std::atomic_compare_exchange_strong(std::shared_ptr...
#include<iostream>#include<atomic>#include<mutex>template<classT>classTestAtomic{private:mutablestd::mutexmtx;intdata;public:intstore(intval){std::lock_guardlk(mtx);data=val;returndata;}intload()const{std::lock_guardlk(mtx);returndata;}intfetch_add(intval){std::lock_guardlk(mtx);intold_va...
std::atomic<int> is not lock-free std::atomic_flag 是 C++ 中的一个原子布尔类型,它用于实现原子锁操作。 std::atomic_flag 默认是清除状态(false)。可以使用 ATOMIC_FLAG_INIT 宏进行初始化,例如:std::atomic_flag flag = ATOMIC_FLAG_INIT; std::atomic_flag 提供了两个成员函数 test_and_set()...
bool atomic_compare_exchange_weak( volatilestd::atomic<T>* obj, typenamestd::atomic<T>::value_type* expected, typenamestd::atomic<T>::value_type desired ) noexcept; (2)(C++11 起) template< class T > bool atomic_compare_exchange_strong(std::atomic<T>* obj, ...
bool atomic_compare_exchange_weak( volatile std::atomic<T>* obj, typename std::atomic<T>::value_type* expected, typename std::atomic<T>::value_type desired ) noexcept; (2) (C++11 起) template< class T > bool atomic_compare_exchange_strong( std::atomic<T>* obj, typename std::at...
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 template<classT> boolatomic_compare_exchange_weak
head.compare_exchange_weak(old_head, new_node, // std::memory_order_release, // std::memory_order_relaxed)); } }; int main() { stack<int> s; s.push(1); s.push(2); s.push(3); }演示compare_exchange_strong 如何要么更改原子对象的值,要么将变量用于比较。
atomic_compare_exchange_XXX函数用观察到的值更新它们的“expected”参数，因此您的循环如下所示：
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) (C++11 起) bool compare_exchange_weak( T& expected, T desired, std::...
std::atomic_ref<T>::compare_exchange_weak,std::atomic_ref<T>::compare_exchange_strong boolcompare_exchange_weak (value_type&expected, value_type desired, std::memory_ordersuccess, std::memory_orderfailure)constnoexcept; (1)(constexpr since C++26) ...