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// C++ program to demonstrate

// multithreading using three

// different callables.

#include <iostream>

#include <thread>

using namespace std;

/**

* 1. 调用普通函数

* 2. 调用类符号重载函数

* 3. 调用类成员函数

* 4. 调用类静态成员函数

* 5. 调用lambda

*/

// 1. A dummy function

void foo(int Z) {

for (int i = 0; i < Z; i++) {

cout << "Thread using function"

" pointer as callable\n";

}

}

// 2. A callable object

class thread_obj {

public:

void operator()(int x) {

for (int i = 0; i < x; i++)

cout << "Thread using function"

" object as callable\n";

}

};

// class definition

class Base {

public:

// 3. non-static member function

void foo();

// 4. static member function

static void foo1();

};

void Base::foo() {

cout << "Thread using non-static member function "

"as callable"

<< endl;

}

void Base::foo1() { // static类成员函数，在类外定义的时候，不能加static

cout << "Thread using static member function as "

"callable"

<< endl;

}

// Driver code

int main() {

cout << "Threads 1 and 2 and 3 "

"operating independently"

<< endl;

// This thread is launched by using

// function pointer as callable

thread th1(foo, 3);

// This thread is launched by using

// function object as callable

thread th2(thread_obj(), 3);

// 5. Define a Lambda Expression

auto f = [](int x) {

for (int i = 0; i < x; i++)

cout << "Thread using lambda"

" expression as callable\n";

};

// This thread is launched by using

// lambda expression as callable

thread th3(f, 3);

// object of Base Class

Base b;

thread th4(&Base::foo, &b);

thread th5(&Base::foo1);

// Wait for the threads to finish

// Wait for thread t1 to finish

th1.join();

// Wait for thread t2 to finish

th2.join();

// Wait for thread t3 to finish

th3.join();

// Wait for thread t4 to finish

th4.join();

// Wait for thread t5 to finish

th5.join();

return 0;

}