classmutex; (since C++11) Themutexclass is a synchronization primitive that can be used to protect shared data from being simultaneously accessed by multiple threads. mutexoffers exclusive, non-recursive owners
1. 多个线程访问同一资源时,为了保证数据的一致性,最简单的方式就是使用 mutex(互斥锁)。 引用cppreference 的介绍: 1 The mutexclassis a synchronization primitive that can be used to protect shared data from being simultaneously accessed by multiple threads. 方法1:直接操作 mutex,即直接调用 mutex 的lock...
classrecursive_mutex; (since C++11) Therecursive_mutexclass is a synchronization primitive that can be used to protect shared data from being simultaneously accessed by multiple threads. recursive_mutexoffers exclusive, recursive ownership semantics: ...
3. std::lock_guard的第二个构造函数 实际上,std::lock_guard有两个构造函数,具体的(参考:cppreference): explicitlock_guard( mutex_type& m ); (1) (since C++11) lock_guard( mutex_type& m, std::adopt_lock_t t ); (2) (since C++11) lock_guard(constlock_guard& ) = delete; (3) (...
classtimed_mutex; (since C++11) Thetimed_mutexclass is a synchronization primitive that can be used to protect shared data from being simultaneously accessed by multiple threads. In a manner similar tomutex,timed_mutexoffers exclusive, non-recursive ownership semantics. In addition,timed_mutexprovides...
cppreference.com Create account Page Discussion Standard revision:DiffC++98/03C++11C++14C++17C++20C++23C++26 View Edit History Standard library header<mutex>(C++11) C++ Standard library headers <cfloat> <climits> <compare> <contracts> <coroutine> ...
1.std::move std::move - cppreference.comstd::move主要使用在以下场景: C++ 标准库使用比如vector::push_back 等这类函数时,会对参数的对象进行复制,连数据也会复制.这就会造成对象内存… HipHo...发表于C++语法... std::move的作用是什么? 直接看std::move中的源码实现:// move template <class ...
代码例子:(参考了 CPP Reference 当中例子) classBrainBox{public:std::mutexc_mutex;intvalue=0;};voidChangeValue(BrainBox&skylake,BrainBox&coffeelake){std::unique_lock<std::mutex>locker1(skylake.c_mutex,std::defer_lock);std::unique_lock<std::mutex>locker2(coffeelake.c_mutex,std::defer_lock)...
shared_mutex的适用场景比较特殊:一个或多个读线程同时读取共享资源,且只有一个写线程来修改这个资源,这种情况下才能从shared_mutex获取性能优势。 cppreference文档 http://en.cppreference.com/w/cpp/thread/shared_mutex Shared mutexes are usually used in situations when multiple readers can access the same ...
https://en.cppreference.com/w/cpp/thread 代码: // ConsoleApplication10.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。 // #include <iostream> #include <windows.h> #include <mutex> int main() { /* WINDOWS MUTEX, unlock 一个没锁上的锁不会有任何异常 ...