WaitForSingleObject等待核心对象激活

最新推荐文章于 2025-12-02 14:36:04 发布

转载最新推荐文章于 2025-12-02 14:36:04 发布 · 652 阅读

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本文探讨了并发编程的概念，介绍了多线程技术的基本原理和实现方式，通过实例展示了如何使用多线程提高程序效率。

#include <iostream>
#include "windows.h"
using namespace std;
int j=0;
DWORD WINAPI MyThreadOne(LPVOID lp)
{
	int *i = (int*)lp;
	*i = *i + 1;
	//int j=0;
	while (j<20)
	{
		cout<<++j<<endl;
		Sleep(500);
	}
	//Sleep(2000);
	return *i;
}

int main()
{
	int i = 2;
	DWORD dExit = 0;
	HANDLE hONE = CreateThread(NULL,0,MyThreadOne,(LPVOID)&i,0,NULL);
	cout<<"	"<<GetExitCodeThread(hONE,&dExit)<<endl;
	cout<<"	"<<(dExit==STILL_ACTIVE)<<endl;
	WaitForSingleObject(hONE,INFINITE); //等待核心对象的激发，然后返回
	cout<<GetExitCodeThread(hONE,&dExit)<<endl;
	cout<<(dExit==STILL_ACTIVE)<<endl;
	CloseHandle(hONE);
	getchar();
	Sleep(2000);
	//ExitThread(4); //退出线程，并没有结束其他线程，
	return 0; //这里退出时调用了CRT的返回函数，然后系统会结束其他线程
}

#include <iostream>
#include "windows.h"
using namespace std;

DWORD WINAPI MyThreadOne(LPVOID lp)
{
	int i = (int)lp;
	int j = rand()%500;
	Sleep((j+500)*2);
	if (i == 3)
	{
	//	Sleep(5000);
	}
	cout<<i<<endl;
	return i;
}

int main()
{
	int i = 0;
	int j = 0; //记录传递参数
	int flag = 0;
	DWORD dExit = 0;
	HANDLE hThread[3];
	for (;i<6;i++)
	{
		if (i>2)
		{
			flag = WaitForMultipleObjects(3,hThread,FALSE,INFINITE);
			flag = flag - WAIT_OBJECT_0;
			CloseHandle(hThread[flag]);
		}
		j = i;
		hThread[flag] = CreateThread(NULL,0,MyThreadOne,(LPVOID)j,0,NULL);
		cout<<"	"<<i<<"	"<<flag<<endl;
		Sleep(2);
		flag++;
	}

	CloseHandle(hThread[0]);
	CloseHandle(hThread[1]);
	CloseHandle(hThread[2]);
	getchar();
	//ExitThread(4); //退出线程，并没有结束其他线程，
	return 0; //这里退出时调用了CRT的返回函数，然后系统会结束其他线程
}