C++线程同步实例分析

// countError.cpp : 定义控制台应用程序的入口点。 // #include "stdafx.h" #include <Windows.h>  DWORD g_cnt1; DWORD g_cnt2; BOOL g_bContinue = TRUE; DWORD WINAPI ThreadProc(__in LPVOID lpParameter) {   while(g_bContinue)   {     g_cnt1++;     g_cnt2++;   }   return 0; }  int _tmain(int argc, _TCHAR* argv[]) {   HANDLE hThread[2];   g_cnt1 = g_cnt2 = 0;    hThread[0] = ::CreateThread(NULL, 0, ThreadProc, NULL, 0, NULL);   hThread[1] = ::CreateThread(NULL, 0, ThreadProc, NULL, 0, NULL);    Sleep(1000);   g_bContinue = FALSE;   ::WaitForMultipleObjects(2, hThread, TRUE, INFINITE);   printf("g_cnt1=%d/n",g_cnt1);   printf("g_cnt2=%d/n",g_cnt2);   ::CloseHandle(hThread[0]);   ::CloseHandle(hThread[1]);   return 0; }