关于lock unlock 和篇PV操作在同步互斥等同效果示例

1.首先是 lock unlock实现互斥：

#include <iostream>     
#include <windows.h>     
using namespace std;  
  
 HANDLE Semaphore;//声明  
  
 DWORD WINAPI MyThread1(LPVOID lpParamter)  
 {  
     while (1)   
     {  
         WaitForSingleObject(Semaphore, INFINITE);//lock  
         cout<<"Hello ";Sleep(1);  
         cout<<"world! ";Sleep(1);  
         cout<<endl;  
         ReleaseMutex(Semaphore);//unlock  
     }  
 }  
  
 DWORD WINAPI MyThread2(LPVOID lpParamter)  
 {  
     while (1)   
     {  
         WaitForSingleObject(Semaphore, INFINITE);//lock  
         cout<<"How ";Sleep(1);  
         cout<<"are ";Sleep(1);  
         cout<<"you! ";Sleep(1);  
         cout<<endl;  
         ReleaseMutex(Semaphore);//unlock  
     }  
 }  
  
  
  
  
 int main()  
{  
  
  
       
     Semaphore = CreateMutex(NULL, FALSE, "screen");//创建互斥锁  
    //创建子线程  
    CreateThread(NULL, 0, MyThread1, NULL, 0, NULL);  
    CreateThread(NULL, 0, MyThread2, NULL, 0, NULL);  
  
    Sleep(500); //线程执行时间  
    return 0;  
}  

2.PV操作实现互斥：

/*信号灯互斥*/  
#include <windows.h>  
#include <stdio.h>  
#include <iostream>  
#include "conio.h"  
using namespace std;  
  
HANDLE Semaphore;                   //声明信号量  
  
DWORD WINAPI MyThread1(PVOID pvParam)  
{  
    WaitForSingleObject(Semaphore,INFINITE);    //p(Semaphore)  
    cout<<"Hello ";  
    //Sleep(1);  
    cout<<"world! ";  
    //Sleep(1);  
    cout<<endl;  
    ReleaseSemaphore(Semaphore,1,NULL);         //v(Semaphore)  
    return 0;  
}  
  
DWORD WINAPI MyThread2(PVOID pvParam)  
{  
    WaitForSingleObject(Semaphore,INFINITE);    //p(Semaphore)  
    cout<<"How ";  
    //Sleep(1);  
    cout<<"are ";  
    //Sleep(1);  
    cout<<"you! ";  
    //Sleep(1);  
    cout<<endl;  
    ReleaseSemaphore(Semaphore,1,NULL);         //v(Semaphore)  
    return 0;  
}  
  
  
int main()  
{  
    Semaphore=CreateSemaphore(NULL,1,1,NULL);   //信号灯初始化为1，第二个参数为初始值，第三个为最大值  
  
    //创建子线程  
    CreateThread(NULL, 0, MyThread1, NULL, 0, NULL);  
    CreateThread(NULL, 0, MyThread2, NULL, 0, NULL);  
  
    Sleep(100);              //主线程等待  
    return 0;  
}  
    

备注：有些代码太长，留着方便查阅