VC下线程同步的三种方法

首选使用临界区对象,主要原因是使用简单。
 
#include <windows.h>
#include <iostream>
using namespace std;
DWORD WINAPI Fun1Proc(LPVOID lpParameter);
DWORD WINAPI Fun2Proc(LPVOID lpParameter);
int tickets=100;
CRITICAL_SECTION g_csA;
CRITICAL_SECTION g_csB;
void main()
{
 HANDLE hThread1;
 HANDLE hThread2;
 hThread1=CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);
 hThread2=CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);
 CloseHandle(hThread1);
 CloseHandle(hThread2);
 InitializeCriticalSection(&g_csA);
 InitializeCriticalSection(&g_csB);
 Sleep(40000);
 DeleteCriticalSection(&g_csA);
 DeleteCriticalSection(&g_csB);
}
DWORD WINAPI Fun1Proc(LPVOID lpParameter)
{
 while (TRUE)
 {
  EnterCriticalSection(&g_csA);
  Sleep(1);

  //EnterCriticalSection(&g_csB);//临界区的同步和互锁
  if (tickets>0)
  {
   Sleep(1);
   cout<<"Thread1 sell ticket :"<<tickets--<<endl;
   //LeaveCriticalSection(&g_csB);
   LeaveCriticalSection(&g_csA);
  }
  else
  {
   //LeaveCriticalSection(&g_csB);
   LeaveCriticalSection(&g_csA);
   break;
  }
 }
 return 0;
}
DWORD WINAPI Fun2Proc(LPVOID lpParameter)
{
 while (TRUE)
 {
  EnterCriticalSection(&g_csB);
  Sleep(1);
  EnterCriticalSection(&g_csA);
  if (tickets>0)
  {
   Sleep(1);
   cout<<"Thread2 sell ticket :"<<tickets--<<endl;
   LeaveCriticalSection(&g_csA);
   LeaveCriticalSection(&g_csB);