【多线程】两个线程交替执行

最新推荐文章于 2024-05-14 07:00:00 发布

bxyill

最新推荐文章于 2024-05-14 07:00:00 发布

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分类专栏： OS/多进程/多线程

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本文介绍了一个使用Windows API实现的线程交替输出示例，通过互斥量控制两个或多个线程间的交替打印字符，展示了如何利用`CreateThread`、`CreateMutex`、`WaitForSingleObject`和`ReleaseMutex`等函数实现线程同步。

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#include <iostream>
#include <windows.h>

using namespace std;
HANDLE hMutex;

DWORD WINAPI Fun(LPVOID lpParamter)
{
    while(1)
	{
		WaitForSingleObject(hMutex, INFINITE);
		cout<<"A"<<endl; 
		Sleep(1000);
		ReleaseMutex(hMutex);
    }
	return 0;
}

DWORD WINAPI Fun1(LPVOID lpParamter)
{
	while(1) 
	{ 
		 WaitForSingleObject(hMutex, INFINITE);
		 cout<<"B"<<endl; 
		 Sleep(1000);
		 ReleaseMutex(hMutex);
	}
	return 0;
}

int main()
{
	HANDLE hThread = CreateThread(NULL, 0, Fun, NULL, 0, NULL);
	hMutex = CreateMutex(NULL, FALSE, (LPWSTR)"screen");
	CloseHandle(hThread);

	HANDLE hThread1 = CreateThread(NULL, 0, Fun1, NULL, 0, NULL);
	CloseHandle(hThread1);
	
	while(1);
	return 0;
}

以上是两个子线程之间交替。主线程闲着。

下面是主线程和一个子线程之间交替

#include <iostream>
#include <windows.h>
using namespace std;
HANDLE hMutex;
DWORD WINAPI Fun(LPVOID lpParamter)
{
	while(1) 
	{ 
		 WaitForSingleObject(hMutex, INFINITE);
		 Sleep(1000);
		 cout<<"Fun display!"<<endl;
		 ReleaseMutex(hMutex);
	}
}

int main()
{
	HANDLE hThread = CreateThread(NULL, 0, Fun, NULL, 0, NULL);
	hMutex = CreateMutex(NULL, FALSE, (LPWSTR)"screen");
	CloseHandle(hThread);
	while(1) 
	{
	   WaitForSingleObject(hMutex, INFINITE);
	   Sleep(1000);
	   cout<<"main display!"<<endl;
	   ReleaseMutex(hMutex);
	}
	return 0;
}

各位大神，如果我想只输出10次呢？怎么改呢？