多進程間的互斥對象通信

代碼程序進程1：

#include<iostream>
#include <Windows.h>
#include <process.h>//使用進程
using namespace std;

HANDLE hMutex;//定義一個句柄給互斥對象使用
DWORD WINAPI Mythread(LPVOID lp1)
{
   char ct1;
   WaitForSingleObject(hMutex,INFINITE);
   cout<<"Get Mutex"<<endl;
   cout<<"Please input the control charater:";
   while(1)
   {
      cin>>ct1;
      if(ct1=='q'||ct1=='Q')
      {
          cout<<"Finished"<<endl;
          break;
      }
      else
          cout<<"Please input again:"<<endl;
   }
   ReleaseMutex(hMutex);
   cout<<"Release the Mutex"<<endl;
   cout<<"Come to your turn:"<<endl;
   return 0;

}

int main(int argc,char* argv[])
{
  HANDLE hHandle;
  DWORD dw1;

  hMutex=CreateMutex(NULL,
      FALSE,
     "MyMutexObject");//有名的互斥對象，可用於進程間的同步
//檢查互斥變量是否創建成功，嚴格；來說，每次都要在程序中檢查這種
  if(hMutex==NULL)
  {
      cout<<"CreateMutex error :"<<GetLastError();
      CloseHandle(hMutex);//關閉互斥變量的句柄
  }
  else
  {
     if(GetLastError()==ERROR_ALREADY_EXISTS)
     {
         cout<<"Mutex has been created!"<<endl;
     }
     else
     {
         cout<<"createMutex successfully"<<endl;
     }

     hHandle=CreateThread(NULL,0,Mythread,NULL,0,&dw1);
     cout<<"create worker handle"<<endl;
  }


  Sleep(70000);
  CloseHandle(hHandle);
  CloseHandle(hMutex);
  return 0;

}

進程2：

include <iostream>
#include <Windows.h>
#include <process.h>
using namespace std;


HANDLE hMutex;

DWORD WINAPI MyThread(LPVOID lp)
{
   WaitForSingleObject(hMutex,INFINITE);
   cout<<"Get the Mutex"<<endl;
   cout<<"Hello!everyone come to my turn"<<endl;

   ReleaseMutex(hMutex);
   cout<<"Release the mutex"<<endl;
   return 0;
}

int main(int argc,char *argv[])
{


    DWORD dw;

    hMutex=OpenMutex(MUTEX_ALL_ACCESS,FALSE,"MyMutexObject");

    if(hMutex==NULL)
    {
        cout<<"OpenMutex error:"<<endl;
        CloseHandle(hMutex);

    }
    else
    {
      if (GetLastError()==ERROR_ALREADY_EXISTS)
      {
          cout<<"Mutex has been opened"<<endl;

      }
      else
          cout<<"Open Mutex successfully"<<endl;
    HANDLE hHandle=CreateThread(NULL,0,MyThread,NULL,0,&dw);
    CloseHandle(hHandle);//得把句柄關閉放在這兒，不然會提示句柄沒有初始化
      cout<<"create worker Mutex "<<endl;

    }
    Sleep(70000);//把時間用的很長，便於操作得到反應
    CloseHandle(hMutex);
    //CloseHandle();
    return 0;

}