大连理工大学软件学院操作系统第二次上机.docx

1、大连理工大学软件学院操作系统第二次上机1、代码：#include#include#include#include#include#include#include#include#include/*定义常量*/#define SHM_MAX_SIZE 80 /定义共享内存最大空间#define SHM_MODE 0600#define SEM_MODE 0600#define MUTEX 2#define SEM_FULL 1#define SEM_EMPTY 0/*const型全局变量*/const int N_CONSUMER=2;const int N_PRODUCER=1;const i

2、nt N_BUFFER=20; /缓冲区容量const int N_WORKTIME=20; /工作时间/*全局变量*/int shm_id=-1;int sem_id=-1;pid_t child; /子程序IDpid_t parent; /父程序ID/*缓冲区*/struct my_buffer int head; int tail; int strSHM_MAX_SIZE/4; int num; /缓冲区内的数的个数 int is_empty;/*生产随机数*/int g_random() int random; srand(unsigned)(getpid()+time(NULL);

3、random=rand()%10; /09随机数 return random;int getRandomNum() int random; srand(unsigned)(getpid()+time(NULL); random=rand()%21; /020随机数 return random;/*PV操作*/sem_id 指的是信号量集合的ID/sem_num 指的是即将处理的信号量在信号量集合中的索引/P操作int waitSem(int sem_id, int sem_num) struct sembuf sb; sb.sem_num=sem_num; sb.sem_op=-1; /信号量

4、-1 sb.sem_flg=SEM_UNDO; if(semop(sem_id,&sb,1)0) perror(waitSem failed!n); exit(1); /V操作int sigSem(int sem_id,int sem_num) struct sembuf sb; sb.sem_num=sem_num; sb.sem_op=1; /信号量加1 sb.sem_flg=SEM_UNDO; if(semop(sem_id,&sb,1)0) perror(sigSem failed!n); exit(1); /*打印结果时间*/void printTime() time_t now;

5、struct tm* timenow; time(&now); timenow=localtime(&now); printf(Actual execute time: %s,asctime(timenow);/*函数主体*/int main() shm_id=shmget(IPC_PRIVATE,SHM_MAX_SIZE,IPC_CREAT|0666); /申请共享内存 if(shm_id0) /创建失败退出程序 perror(Create shared memory failed!n); exit(1); struct my_buffer *shmptr; shmptr=(struct m

6、y_buffer*)shmat(shm_id,NULL,1); /连接共享内存和通信进程空间 if(shmptr=(void*)-1) /连接失败退出程序 perror(Add buffer to shared memory failed!n); exit(1); /创建信号量,失败则退出 if(sem_id=semget(IPC_PRIVATE,3,SEM_MODE)head=0; shmptr-tail=0; shmptr-num=0; shmptr-is_empty=1; /生产者部分 parent=fork(); if(parent0) perror(Producer fork fai

7、led!n); exit(1); else if(parent=0) shmptr=shmat(shm_id,0,0); /连接空间至共享内存 if(shmptr=(void*)-1) perror(Add buffer to the shared momory failed!n); exit(1); int count=0; for(int i=0;istrshmptr-tail=x; shmptr-tail=(shmptr-tail+1)%SHM_MAX_SIZE; shmptr-is_empty=0; shmptr-num+; /输出生产时间 printTime(); int p; pr

8、intf(The number in buffer is %d.n,shmptr-num+1); /放入内存 p=(shmptr-tail-1=shmptr-head)?(shmptr-tail-1):(shmptr-tail-1+SHM_MAX_SIZE); for(p;!(shmptr-is_empty)&p=shmptr-head;p-) printf(%d ,shmptr-strp%SHM_MAX_SIZE); printf(Producer puts %d into the memory!n,x); printf(-No.%d end-n,i+1); fflush(stdout);

9、sigSem(sem_id,MUTEX); sigSem(sem_id,SEM_FULL); /断开连接 shmdt(shmptr); exit(0); /消费者程序 for(int i=0;iN_CONSUMER;i+) child=fork(); if(child0) perror(Child fork failed!n); exit(1); else if(child=0) shmptr=shmat(shm_id,0,0); /连接空间至共享内存 if(shmptr=(void*)-1) perror(Add buffer to the shared momory failed!n);

10、exit(1); int count=0; for(int j=0; jnum!=0) /消费 int y=shmptr-strshmptr-head; shmptr-head=(shmptr-head+1)%SHM_MAX_SIZE; shmptr-is_empty=(shmptr-head=shmptr-tail); shmptr-num-; int p; printf(The number in buffer is %d.n,shmptr-num+1); /取出内存 p=(shmptr-tail-1=shmptr-head)?(shmptr-tail-1):(shmptr-tail-1+

11、SHM_MAX_SIZE); for(p;!(shmptr-is_empty)&p=shmptr-head;p-) printf(%d ,shmptr-strp%SHM_MAX_SIZE); printf(Consumer gets %d out of the memory!n,y); else printf(The memory is empty!n); printf(-Consumer N0.%d process No.%d end-n,i+1,j+1); fflush(stdout); sigSem(sem_id,MUTEX); sigSem(sem_id,SEM_EMPTY); /断开

12、连接 shmdt(shmptr); exit(0); /退出主程序 while(wait(0)!=-1); /解除连接 shmdt(shmptr); shmctl(shm_id,IPC_RMID,0); shmctl(sem_id,IPC_RMID,0); printf(Exit the main process!n); fflush(stdout); exit(0); return 0;截图：2、代码：#include #include #include #include #include #include #include #include #include /*定义常量*/#define

13、 SHM_MAX_SIZE 2 /定义共享内存最大空间#define SHM_MODE 0600#define SEM_MODE 0600#define MUTEX 2#define SEM_FULL 1#define SEM_EMPTY 0/*const型全局变量*/const int N_CONSUMER = 2;const int N_PRODUCER = 2;const int N_BUFFER = 2; /缓冲区容量const int N_WORKTIME = 10; /工作时间/*全局变量*/int shm_id = -1;int sem_id = -1;pid_t child;

14、/子程序IDpid_t parent; /父程序ID/*缓冲区*/struct my_buffer int head; int tail; int strSHM_MAX_SIZE; int num; /缓冲区内的数的个数 int is_empty;/*生产随机数*/int g_random() int random; srand(unsigned)(getpid() + time(NULL); random = rand() % 10; /010随机数 return random;int getRandomNum() int random; srand(unsigned)(getpid() +

15、 time(NULL); random = rand() % 2; /01随机数 return random;/*PV操作*/sem_id 指的是信号量集合的ID/sem_num 指的是即将处理的信号量在信号量集合中的索引/P操作int waitSem(int sem_id, int sem_num) struct sembuf sb; sb.sem_num = sem_num; sb.sem_op = -1; /信号量-1 sb.sem_flg = SEM_UNDO; if (semop(sem_id, &sb, 1) 0) perror(waitSem failed!n); exit(1)

16、; /V操作int sigSem(int sem_id, int sem_num) struct sembuf sb; sb.sem_num = sem_num; sb.sem_op = 1; /信号量加1 sb.sem_flg = SEM_UNDO; if (semop(sem_id, &sb, 1) 0) perror(sigSem failed!n); exit(1); /*打印结果时间*/void printTime() time_t now; struct tm *timenow; time(&now); timenow = localtime(&now); printf(Actua

17、l execute time: %s, asctime(timenow);/*函数主体*/int main() shm_id = shmget(IPC_PRIVATE, SHM_MAX_SIZE*4, IPC_CREAT | 0666); /申请共享内存 if (shm_id 0) /创建失败退出程序 perror(Create shared memory failed!n); exit(1); struct my_buffer *shmptr; shmptr = (struct my_buffer *)shmat(shm_id, NULL, 1); /连接共享内存和通信进程空间 if (sh

18、mptr = (void *)-1) /连接失败退出程序 perror(Add buffer to shared memory failed!n); exit(1); /创建信号量,失败则退出 if (sem_id = semget(IPC_PRIVATE, 3, SEM_MODE) head = 0; shmptr-tail = 0; shmptr-num = 0; shmptr-is_empty = 1; /父亲部分 parent = fork(); if (parent 0) perror(Father fork failed!n); exit(1); else if (parent =

19、 0) shmptr = shmat(shm_id, 0, 0); /连接空间至共享内存 if (shmptr = (void *)-1) perror(Add buffer to the shared momory failed!n); exit(1); int count = 0; for (int i = 0; i strshmptr-tail = x; shmptr-tail = (shmptr-tail + 1) % SHM_MAX_SIZE; shmptr-is_empty = 0; shmptr-num+; /输出生产时间 printTime(); int p; printf(T

20、he number of fruit in plant is %d.n, shmptr-num); /放入内存 p = (shmptr-tail - 1 = shmptr-head) ? (shmptr-tail - 1) : (shmptr-tail - 1 + SHM_MAX_SIZE); if (x = 0) printf(It is apple in the plant.n); else if (x = 1) printf(It is orange in the plant.n); printf(-No.%d end-n, i + 1); fflush(stdout); sigSem(sem_id, MUTEX); sigSem(sem_id, SEM_FULL); /断开连接 shmdt(shmptr); exit(0); /儿子女儿程序,0儿子，1女儿 for (int i = 0; i N_CONSUMER; i+) child = fork(); if (child 0) perror(Child fork failed!n); exit(1); else if (child = 0) shmptr = shmat(shm_id, 0, 0); /连接空间至共享内存 if (shmptr = (void *)-1) perror(Add b