多线程5 Critical_Section

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

using namespace std;
int tickets = 100;
CRITICAL_SECTION  g_cs;
DWORD  WINAPI func1(LPVOID lpParameter)
{
 while(true)
 {
  EnterCriticalSection(&g_cs);
  if(tickets>0)
  {
   Sleep(1);
   cout<<"Thread1 sells tickets"<<tickets--<<endl;
  }
  else
   break;
  LeaveCriticalSection(&g_cs);
 }
 return 0;
}

DWORD WINAPI func2(LPVOID lpParameter)
{
 while(true)
 {
  EnterCriticalSection(&g_cs);
  if(tickets>0)
  {
   Sleep(1);
   cout<<"Thread2 sells tickets"<<tickets--<<endl;
  }
  else
  {
   break;
  }
  LeaveCriticalSection(&g_cs);
 }
 return 0;
}
int _tmain(int argc, _TCHAR* argv[])
{
    HANDLE hThread1 = CreateThread(NULL,0,func1,NULL,0,NULL);
 HANDLE hThread2 = CreateThread(NULL,0,func2,NULL,0,NULL);
 CloseHandle(hThread1);
 CloseHandle(hThread2);
 InitializeCriticalSection(&g_cs);
 Sleep(4000);
 DeleteCriticalSection(&g_cs);
 return 0;
}