简单的多线程练习两例

例1：在主线程(main)中创建一个子线程，判断7s超时。

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

DWORD WINAPI timeOutTest(LPVOID lpParamter)
{      
	   clock_t start, finish;
	   double duration; 
	   start=clock();
       while(1) 
	   { 
		  finish = clock();
		  duration = (double)(finish - start) / CLOCKS_PER_SEC; 
		  cout<<"Time duration: "<<duration<<endl; 
		  if(duration>=7.0)
			  break;
        }
	   return 0;
}

int main()
{
      HANDLE hThread = CreateThread(NULL, 0, timeOutTest, NULL, 0, NULL);
      CloseHandle(hThread);
      while(1)
	  {}
      return 0;
}

结果：

例2：含有互斥变量的简单多线程。

main和Fun互斥访问｛WaitForSingleObject.....ReleaseMutex｝之间的变量。

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



int x=0;
HANDLE hMutex;
DWORD WINAPI Fun(LPVOID lpParamter)
{      
       while(1) 
	   { 
                 WaitForSingleObject(hMutex, INFINITE);
         //        cout<<"Fun display!"<<endl; 
				 x=x+1;
				 cout<<"Fun x: "<<x<<endl;
                 Sleep(1000);
                 ReleaseMutex(hMutex);
        }
}

int main()
{
      HANDLE hThread = CreateThread(NULL, 0, Fun, NULL, 0, NULL);
      hMutex = CreateMutex(NULL, FALSE, "screen");
      CloseHandle(hThread);
      while(1) 
	  {
               WaitForSingleObject(hMutex, INFINITE);
            //   cout<<"main display!"<<endl;  
			   x=x+1;
			   cout<<"Main x: "<<x<<endl;
               Sleep(2000);
               ReleaseMutex(hMutex);
      }
      return 0;
}

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