main.cpp #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);...
std::atomic<T>::compare_exchange_weak,std::atomic<T>::compare_exchange_strong 定义于头文件<atomic> (1)(C++11 起) boolcompare_exchange_weak(T&expected, T desired, std::memory_ordersuccess, std::memory_orderfailure)noexcept; boolcompare_exchange_weak(T&expected, T desired, ...
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, std::memory_orderfailure)noexcept; (1)(C++11 起)
bool atomic_compare_exchange_strong_explicit(A* object, C * expected, C desired, memory_order success, memory_order failure); bool A::compare_exchange_weak(C & expected, C desired, memory_order success, memory_order failure) volatile; bool A::compare_exchange_weak(C & expected, C desired,...
std::atomic<T>::compare_exchange_weak,std::atomic<T>::compare_exchange_strong C++ Concurrency support library std::atomic boolcompare_exchange_weak(T&expected, T desired, std::memory_ordersuccess, std::memory_orderfailure)noexcept; (1)(since C++11) ...
bool atomic_compare_exchange_strong( std::atomic<T>* obj, typename std::atomic<T>::value_type* expected, typename std::atomic<T>::value_type desired ) noexcept; template< class T > bool atomic_compare_exchange_strong( volatile std::atomic<T>* obj, typename std::atomic<T>::value_type...
注意,compare_exchange_weak函数是一个弱化版本的原子操作函数,因为在某些平台上它可能会失败并重试。如果需要保证严格的原子性,则应该使用compare_exchange_strong函数。 示例: #include <iostream> // std::cout #include <atomic> // std::atomic #include <thread> // std::thread #include <vector> // st...
std::atomic_compare_exchange_weak,std::atomic_compare_exchange_strong,std::atomic_compare_exchange_weak_explicit,std::atomic_compare_exchange_strong_explicit 定义于头文件<atomic> (1)(C++11 起) template<classT> boolatomic_compare_exchange_weak(std::atomic<T>*obj, ...
template< class T > bool atomic_compare_exchange_strong_explicit( volatile std::atomic<T>* obj, T* expected, T desired, std::memory_order succ, std::memory_order fail ); 原子比较对象表示所指向的对象的obj所指向的对象的对象表示形式。expected,好像std::memcmp,如果这些是按位相等的,则将...
boolatomic_compare_exchange_weak (volatilestd::atomic<T>*obj, typenamestd::atomic<T>::value_type*expected, typenamestd::atomic<T>::value_typedesired)noexcept; (2)(C++11 起) template<classT> boolatomic_compare_exchange_strong (std::atomic<T>*obj,typenamestd::atomic<T>::value_type*expected...