操作系统实习示例答案.doc

附录一 银行排号系统程序示例 #includewindows.h //SDK头文件,提供API编程 #includestring //字符数组定义头文件 #includeiostream #include time.h //日期和时间头文件 using namespace std; #define MAXTHREADNUM 200 //每天来的顾客量 HANDLE seats; //空座位信号量 HANDLE cu1; //高级客户信号量 HANDLE ser1; //对公服务窗口 HANDLE cu2; //普通客户信号量 HANDLE ser2; //对私服务窗口 HANDLE h_mutex; //互斥量 HANDLE shuzu[MAXTHREADNUM]; //存储线程句柄的数组 int g=1; //高级客户号数 int p=1; //普通客户号数 DWORD WINAPI customer1(PVOID cu1pv)//高级客户线程代码 { int N; DWORD WaitForSemaphor,WaitForSemaphor1,WaitForMutex,m_delay=997, n_dalay=7099;//等待状态，等待时间 WaitForSemaphor=WaitForSingleObject(seats,-1);//等待座位 WaitForMutex= WaitForSingleObject(h_mutex,-1);//等待取号 coutg号高级客户正在取号endl; //取号 N=g; g++; coutN号高级客户取号成功，等待服务endl; Sleep(m_delay); // 等待服务 ReleaseMutex(h_mutex); //打开互斥锁 ReleaseSemaphore(cu1,1,NULL); // WaitForSemaphor1=WaitForSingleObject(ser1,-1); coutN号高级客户得到服务endl; Sleep(n_dalay); //对高级客户进行服务时间 ReleaseSemaphore(seats,1,NULL); coutN号高级客户已离开endl; coutendl; return 0; } DWORD WINAPI server1(PVOID ser1pv) //营业员(对共）线程代码 { while(true) { DWORD WaitForSemaphor,m_delay=1000; WaitForSemaphor=WaitForSingleObject(cu1,-1); Sleep(m_delay); //叫号服务 ReleaseSemaphore(ser1,1,NULL);// } } DWORD WINAPI customer2(PVOID cu2pv)//普通客户 { int M; DWORD WaitForSemaphor,WaitForSemaphor1,WaitForMutex,m_delay=997, n_dalay=6199; WaitForSemaphor==WaitForSingleObject(seats,-1);//等待座位 WaitForMutex= WaitForSingleObject(h_mutex,-1);//等待取号 coutp号普通客户正在取号endl; //取号 M=p;p++; coutM号普通客户取号成功，等待服务endl; Sleep(m_delay); ReleaseMutex(h_mutex); //打开互斥锁 ReleaseSemaphore(cu2,1,NULL); WaitForSemaphor1=WaitForSingleObject(ser2,-1); coutM号普通客户得到服务endl; Sleep(n