文章目录
线程定义
实现并行，避免主线程的阻塞
线程实现
void func()
{
cout<<"thread func :"<<this_thread::get_id()<<endl;
}
int main()
{
cout<<"main thread :"<<this_thread::get_id()<<endl;
thread t(func);
t.join();
cout<<"thread is over"<<endl;
return 0;
}
输出：
main thread :1
thread func :2
ref：修改线程函数变量作用域
void func(int &n)
{
cout<<n<<endl;
n = 10;
}
int main()
{
int n = 5;
thread t(func,ref(n));
t.join();
cout<<n<<endl; // 10
cout<<"thread is over"<<endl;
return 0;
}
输出：
5
10
thread is over
join
join：阻塞主线程，子线程调用jion后，主线程需要等待子线程执行完后，再继续执行
join阻塞主进程结束，对子线程的执行没有影响
code:
void func()
{
cout<<"thread func :"<<this_thread::get_id()<<endl;
this_thread::sleep_for(chrono::seconds(10));
}
void func2