16.1.4火车站售票系统模拟程序(Event)

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

DWORD WINAPI ThreadProc1(LPVOID lpParameter);
DWORD WINAPI ThreadProc2(LPVOID lpParameter);
HANDLE hEvent;
int tickets = 100;

int main()
{
 hEvent = CreateEvent(NULL,FALSE,TRUE,NULL);
 HANDLE hThread1 = CreateThread(NULL,0,ThreadProc1,NULL,0,NULL);
 HANDLE hThread2 = CreateThread(NULL,0,ThreadProc2,NULL,0,NULL);
 DWORD nCount = 2;
 HANDLE* lpHandles = new HANDLE[nCount];
 lpHandles[0] = hThread1;
 lpHandles[1] = hThread2;
 WaitForMultipleObjects(nCount,lpHandles,TRUE,INFINITE);
 CloseHandle(hThread2);
 CloseHandle(hThread1);
 CloseHandle(hEvent);
 return 0;
}

DWORD WINAPI ThreadProc1(LPVOID lpParameter)
{
 while(true)
 {
  WaitForSingleObject(hEvent,INFINITE);
  if(tickets > 0)
  {
   cout<<"ThreadProc1 sells "<<tickets--<<endl;
   SetEvent(hEvent);
  }
  else
  {
   SetEvent(hEvent);
   break;
  }
 }
 return 0;
}

DWORD WINAPI ThreadProc2(LPVOID lpParameter)
{
 while(true)
 {
  WaitForSingleObject(hEvent,INFINITE);
  if(tickets > 0)
  {
   cout<<"ThreadProc2 sells "<<tickets--<<endl;
   SetEvent(hEvent);
  }
  else
  {
   SetEvent(hEvent);
   break;
  }
 }
 return 0;
}