多线程同步

#include <iostream.h>
#include <windows.h>
#include <process.h>  //缺少将出现error   C2039:   '_beginthreadex'   :   is   not   a   member   of   '`global   namespace''，

long int one=0,two=0;

CRITICAL_SECTION g_cs;

UINT WINAPI Threahfun(LPVOID lpParam)
{
while(1){
  ::EnterCriticalSection(&g_cs);  //保护共享数据
  one++;
  two++;
     ::LeaveCriticalSection(&g_cs);
}
return 0;
}
int main()
{
::InitializeCriticalSection(&g_cs);  //初始化临界区
UINT uID1,uID2;
HANDLE mythread[2];      //声明句柄数组
mythread[0]=(HANDLE)::_beginthreadex(NULL,0,Threahfun,NULL,0,&uID1);   //开始构造新的线程1
mythread[1]=(HANDLE)::_beginthreadex(NULL,0,Threahfun,NULL,0,&uID2);   //开始构造新的线程2
Sleep(1000);
::WaitForSingleObject(mythread,INFINITE);
::CloseHandle(mythread[0]);   //关闭句柄
::CloseHandle(mythread[1]);
cout<<one<<endl;
cout<<two<<endl;
return 0;
}