c++多线程运行多个类的相同函数

c++多线程运行多个类的相同函数

注：本代码是在VS2019编译器上运行的。

以下所有代码都在同一个CPP里。

顺序是从上到下的。按照这个顺序赋值代码块粘贴到cpp里就完全OK。

头文件

#include 
#include 
#include 

 全局变量

std::mutex theMutex;
using uLock = std::unique_lock;


void ShowBigAndSmallNumber(int iBigNumber, int iSmallNumber) {
	std::cout << "模块::" << iBigNumber << ",id是::" << iSmallNumber <<  std::endl;
}

类的定义 成员 和 函数

class MyClass {
public:
	MyClass() {}
	~MyClass() {}
	MyClass(int iBigIndex);

	void FomrBigMap();
private:
	int iBigIndex = -1;
};

MyClass::MyClass(int iBigIndex) {
	this->iBigIndex = iBigIndex;
}

void MyClass::FomrBigMap() {
	for (int index = 1; index <= 200; index++) {
		Sleep(50); //先sleep50ms，方便观察，以免单个线程抢占太多
		uLock lock(theMutex);
		ShowBigAndSmallNumber(this->iBigIndex, index);
	}
	Sleep(3 * 1000);
	std::cout << "" << std::endl;
	std::cout << "模块::" << this->iBigIndex << "执行完毕" << std::endl;
	std::cout << "" << std::endl;
}

主函数

void main() {
	std::vector> vecConTextAndThread;
	for (size_t index = 1; index <= 10; index++) {
		MyClass* newClass = new MyClass(index);
		vecConTextAndThread.push_back(std::pair(newClass ,new std::thread(&MyClass::FomrBigMap, newClass)) );
	}

	//下面这个For循环，会等到所有线程都运行完毕，才会继续走for循环下面的部分。
	for (size_t index = 0; index < vecConTextAndThread.size(); index++) {
		if (vecConTextAndThread[index].second != nullptr) {
			if (vecConTextAndThread[index].second->joinable() == true) {
				vecConTextAndThread[index].second->join();
                std::cout << "线程id::" << (index + 1) << "join" << std::endl;
			}
		}
	}
	
	std::cout << "所有线程执行完毕" << std::endl;

	//将堆中的数据清除
	for (size_t index = 0; index < vecConTextAndThread.size(); index++) {
		if (vecConTextAndThread[index].first != nullptr) {
			delete vecConTextAndThread[index].first;
			vecConTextAndThread[index].first = nullptr;
		}

		if (vecConTextAndThread[index].second != nullptr) {
			delete vecConTextAndThread[index].second;
			vecConTextAndThread[index].second = nullptr;
		}
	}

	system("pause");

}

 以下是打印结果。