其中一种常见的思路就是CAS(compare-and-swap)。C++的原子变量(atomic)就提供了compare_exchange_weak和compare_exchange_strong来实现CAS机制。下面的代码是基于CAS实现的多线程安全方案。 template<typename T> class cas_vector{ std::atomic<bool> flag; vector<T> mvec; void lock(){ bool expect = false; ...
问调整为所有原子bools赋值true的std::vector<std::atomic_bool>大小EN版权声明：本文内容由互联网用户...
std::atomic_flag和std::atomic (一)std::atomic_flag 1. std::atomic_flag是一个bool类型的原子变量,它有两个状态set和clear,对应着flag为true和false。 2. std::atomic_flag使用前必须被AT... 浅墨浓香 1 14554 在WinDbg中显示和搜索std::map内容 2019-12-09 17:17 − 我们希望在WinDbg中自动...
原子性操作 | Atomic operations 概念| Concepts 容器| Containers cbefore_begin Containers library Node handle operators (std::array) operators (std::deque) operators (std::forward_list) operators (std::list) operators (std::map) operators (std::multimap) operators (std::multiset) operators (std...
std::find(vector.begin(), vector.end(), item) != vector.end() This returns a bool (trueif present,falseotherwise). With your example: #include <algorithm>if( std::find(vector.begin(), vector.end(), item) !=vector.end() )
Reference <vector> vector get_allocator public member function <vector> std::vector::get_allocator C++98 C++11 allocator_type get_allocator() const; Get allocator Returns a copy of the allocator object associated with the vector. Parameters none Return Value The allocator. Member type allocator...
<atomic> C++11 <condition_variable> C++11 <future> C++11 <mutex> C++11 <thread> Other: <algorithm> <bitset> C++11 <chrono> C++11 <codecvt> <complex> <exception> <functional> C++11 <initializer_list> <iterator> <limits> <locale> ...
原子性操作 | Atomic operations 概念| Concepts 容器| Containers cbefore_begin Containers library Node handle operators (std::array) operators (std::deque) operators (std::forward_list) operators (std::list) operators (std::map) operators (std::multimap) operators (std::multiset) operators (std...
for循环执行任务 每个线程执行任务1000次后将vector[thread_inde…看到很多人说得用atomic的，实际上题主...
改成std::vector<std::atomic<bool>>看看，这样应该可以：#include<vector>#include<atomic>#include<t...