C++多线程编程例子 Demo 关键代码段 临界区 实现线程同步

DWORD WINAPI Fun1Proc(LPVOID lParam);DWORD WINAPI Fun2Proc(LPVOID lParam);int balance = 110;//账户余额[最少10元保底]CRITICAL_SECTION critical;//代码临界区/* 运用关键代码端[临界区]实现线程间同步 */void main(){InitializeCriticalSection(&critical);HANDLE hThread1 = CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);//线程1存钱[每次存100元,账户最多110元]HANDLE hThread2 = CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);//线程2取钱[每次取100元,账户至少留10元]CloseHandle(hThread1);CloseHandle(hThread2);Sleep(5000);DeleteCriticalSection(&critical);}DWORD WINAPI Fun1Proc(LPVOID lParam){int i = 50;while (i-- > 0){EnterCriticalSection(&critical);if (balance 0){EnterCriticalSection(&critical);if (balance-100<10){printf("线程2:\t账户余额:%d元,余额不足,线程2不能取款,等待线程1存款...\n",balance);LeaveCriticalSection(&critical);continue;}printf("线程2:\t账户余额%d元,线程2取款100元\n",balance);balance-=100;LeaveCriticalSection(&critical);}return 0;}