c++11新特性之多线程总结

c++11新特性之多线程总结

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一、线程初始化方式

//初始化
	std::thread thread_1(thread1);
	if (thread_1.joinable()) thread_1.join();
	std::thread thread_2(thread2, 2);
	if (thread_2.joinable()) thread_2.join();
	std::thread(thread2, 3).detach();
	auto lambda = [](int a) {
   
   

		std::cout << "lambda : " << a << std::endl;
	};
	std::thread thread_3(thread3, 3);
	std::this_thread::sleep_for(std::chrono::seconds(5));//主线程延时

	std::thread thread_4(thread4, 4);
	std::thread thread_5(lambda, 5);
	std::cout << "当前 cpu 个数 " << std::thread::hardware_concurrency() << std::endl;

	if (thread_3.joinable())
		thread_3.join();

	if (thread_4.joinable())
		thread_4.join();

	if (thread_5.joinable())
		thread_5.join();

二、总结

1.detach()是将子线程与主线程分离，成为孤儿线程

2.孤儿线程通信方式：

#include <queue>

std::mutex cv_mutex;

void produceA(std::queue<char>& q) {
   
   
	std::unique_lock<std::mutex> lock;
	f