std::lock_guard和std::mutex是 C++ 标准库中用于实现互斥锁的类和对象。 std::mutex是一个基本的互斥量类,用于保护共享资源,防止多个线程同时访问和修改。在需要对临界区进行保护时,可以使用std::mutex来创建一个互斥量对象。 下面是一个简单的例子,展示了如何使用std::mutex和std::lock_guard进行互斥访问: #...
std::recursive_mutex:递归mutex类,能多次锁定而不死锁。 std::time_mutex:定时mutex类,可以锁定一定的时间。 std::recursive_timed_mutex:定时递归mutex类。 ——> > > std::mutex:std::mutex是C++中最基本的互斥量,提供了独占所有权的特性,std::mutex提供了以下成员函数: 构造函数:std::mutex不允许拷贝构造...
{ // using a local lock_guard to lock mtx guarantees unlocking on destruction / exception: std::lock_guard<std::mutex> lck (mtx); print_even(id); } catch (std::logic_error&) { std::cout << "[exception caught]\n"; } } int main () { std::thread threads[10]; // spawn 10...
// using a local lock_guard to lock mtx guarantees unlocking on destruction / exception: std::lock_guard<std::mutex> lck (mtx); print_even(id); } catch (std::logic_error&) { std::cout << "[exception caught]\n"; } } int main(int argc, char *argv[]) ...
std::lock_guard<std::mutex> (this->mtx_); }private: std::mutex mtx_; }; But, the following code is not ok. intmain(){ std::lock_guard<std::mutex> (mtx); std::lock_guard<std::mutex> (mtx); } You declared the variablemtxtwice ...
std::lock_guard是RAII模板类的简单实现,功能简单。 booltry_pop(T&value){std::lock_guard<std::mutex>lk(mut);if(data_queue.empty()){returnfalse;}returnTrue;//析构时自动解锁} std::unique_lock std::unique_lock为锁管理模板类,是对通用mutex的封装。std::unique_lock对象以独占所有权的方式(uniqu...
std::lock_guard<std::mutex>_lock_guard(_mtx);staticintnum =0;for(inti =0; i < len; i++) { std::stringtemp_str =get_uuid(); _mtx_map.insert(std::pair<int, std::string>(++num, temp_str)); } }voidmt_fill_mtx_map(constint&x,constint&y,constint&z,constint&w) ...
I'm attempting to access a shared std::queue using a std::mutex and a std::lock_guard. The mutex (pending_md_mtx_) is a member variable of another object (whose address is valid). My code seems to be segfault'ing on the construction of the lock_guard. ...
auto beginTime=std::chrono::high_resolution_clock::now();//std::lock_guard<std::mutex> lock(my_lock);std::unique_lock<std::mutex>sbguard(my_lock, std::try_to_lock); auto endTime=std::chrono::high_resolution_clock::now();