c++筆記 Thread

// CTest.cpp : 定義控制檯應用程序的入口點。
//

#include "stdafx.h"
#include <thread>
#include <iostream>
void f1(int n)
{
	for (int i = 0; i < 5; ++i)
	{
		std::cout << "Thread 1 executing\n";
		++n;
		std::this_thread::sleep_for(std::chrono::milliseconds(10));
	}
}

void f2(int& n)
{
	for (int i = 0; i < 1; ++i)
	{
		std::cout << "Thread 2 executing\n";
		++n;
		std::this_thread::sleep_for(std::chrono::milliseconds(10));
	}

}

void f3()
{
	for (int i = 0; i < 5; ++i)
	{
		std::cout << "Thread 3 executing\n";
		std::this_thread::sleep_for(std::chrono::milliseconds(10));
	}
}
int _tmain(int argc, _TCHAR* argv[])
{
	int n = 0;
	std::thread t1;
	std::thread t2(f1, n);<span style="white-space:pre">		</span>//傳參的構造函數
	std::thread t3(f2, std::ref(n)); //傳引用的構造函數
	std::thread t4(std::move(t3));<span style="white-space:pre">	</span>//將線程t3的所有者轉移給t4

	std::thread t5(f3);<span style="white-space:pre">		</span>//不傳參的構造函數

	std::cout << std::thread::hardware_concurrency() << std::endl;<span style="white-space:pre">	</span>//當前線程數
	std::cout << t2.native_handle() << std::endl;<span style="white-space:pre">			</span>//當前線程的指針地址


	std::cout << "Final value of n is " << n <<"\n";
	
	std::cout << "before swap\n";
	std::cout << "t2_id:" << t2.get_id() << "\n";
	std::cout << "t4_id:" << t4.get_id() << "\n";

	std::cout << "after swap \n";
	std::swap(t2, t4);<span style="white-space:pre">			</span>//轉換t2 t4
	std::cout << "t2_id:" << t2.get_id() << "\n";
	std::cout << "t4_id:" << t4.get_id() << "\n";

<span style="white-space:pre">	</span><pre name="code" class="cpp">	t5.detach();<span style="white-space:pre">		</span>//獨立出線程t5

t2.join(); // 等待t2 線程結束 t4.join();

<span style="white-space:pre">	</span>
	return 0;
}