typename std::atomic<T>::difference_type arg, std::memory_order order ) noexcept; template< class T > T atomic_fetch_add_explicit( volatile std::atomic<T>* obj, typename std::atomic<T>::difference_type arg, std::memory_order order ) noexcept;进行...
a.store(value, std::memory_order::memory_order_relaxed)不能保证当前写入立即生效,有可能这个值会被...
T fetch_add( T arg, std::memory_order order = std::memory_order_seq_cst ) noexcept; T fetch_add( T arg, std::memory_order order = std::memory_order_seq_cst ) volatile noexcept; 仅为atomic<T*> 模板特化的成员 (2) T* fetch_add( std::ptrdiff_t arg, std::memory_order or...
fetch_add 原子地将参数加到存储于原子对象的值,并返回先前保有的值 (std::atomic<T> 的公开成员函数) atomic_fetch_subatomic_fetch_sub_explicit (C++11)(C++11) 从原子对象减去非原子值,并获得原子对象的先前值 (函数模板) atomic_fetch_add, atomic_fetch_add_explicit 的C 文档 ...
这两种方式在使用上没有区别,你可以根据自己的喜好选择使用哪一种。例如,你可以这样声明和使用一个原子布尔变量: std::atomic_bool b1(false);std::atomic<bool> b2(false);b1.store(true);b2.store(true);bool v1 = b1.load();bool v2 = b2.load(); ...
std::atomic<int> a = 0; // 初始值 // Thread 1 a.store(0xFFFFFFFF); // Thread 2 ...
是操作的伪代码atomic_add_fetch. std::atomic<T>如果T是整型,则有一个operator+=执行相同操作的成员。它与所有其他原子复合赋值运算符一起在\xc2\xa729.6.5/30-32 \n \n CA::operator op=(M 操作数) 易失性 noexcept; \n CA::operator op=(M 操作数) noexcept; ...
#include <iostream> #include <thread> #include <atomic> std::atomic<long long> data; void do_work() { data.fetch_add(1, std::memory_order_relaxed); } int main() { std::thread th1(do_work); std::thread th2(do_work); std::thread th3(do_work); std::thread th4(do_work); ...
T fetch_add( T arg, std::memory_order order = std::memory_order_seq_cst ) volatile; (2) (since C++11) (member only of atomic<T*> template specialization) T* fetch_add( std::ptrdiff_t arg, std::memory_order order = std::memory_order_seq_cst ); ...
atomic_compare_exchange_weak_explicitstd::atomic_exchangestd::atomic_exchange_explicitstd::atomic_fetch_addstd::atomic_fetch_add_explicitstd::atomic_fetch_andstd::atomic_fetch_and_explicitstd::atomic_fetch_orstd::atomic_fetch_or_explicitstd::atomic_fetch_substd::atomic_fetch_sub_explicitstd::...