/*
*yctc cg
*/
#include "stdio.h"
#include "dos.h"
#include "stdlib.h"
#include "conio.h"
#define SEC 3
#define NULL 0
/*定义结构体*/
typedef struct PCB
{
int PID;
int UID;
struct PCB * next;
}PCB;
PCB *really , *excute , *wait;
/*create queue header */
/*queue operation 入队*/
int enqueue(PCB *head , PCB *node)
{
PCB *p;
p = head;
if(p -> next == NULL)
{
head -> next = node;
return 1;
}
while(p)
{
if(p -> next == NULL)
{
p -> next = node;
return 1;
}
else p = p -> next;
}
}/*enquue*/
/*dequeue 出队列 */
PCB * dequeue(PCB *head)
{
PCB *p;
p = head;
if(p -> next == NULL)
{
return NULL;
}
else
{
p = p -> next;
head -> next = p -> next;
p -> next = NULL;
return p;
}
/*head to next*/
}/*dequeue*/
/*PCB operate*/
/*新建进程*/
int create()
{
PCB *p;
p = (PCB*)malloc(sizeof(PCB));
p -> next = NULL;
printf("input PID and UID to a new process\n");
scanf("%d %d",&p -> PID,&p -> UID);
if(enqueue(really , p))
printf("create a process: PID = %d UID = %d\n", p -> PID , p -> UID);
else
printf("create Failed\n");
}/*create*/
/*执行 fexcute*/
int fexcute()
{
PCB *p = dequeue(really);
if(p == NULL)
{
printf("NO process in queue \n");
return 0;
}
else
{
enqueue(excute , p);
printf("add a process into excute queue process: PID = %d UID= %d \n" ,p->PID , p->UID);
return 1;
}
}/*excute*/
int suspend()
{
PCB *p = dequeue(excute);
if(p == NULL)
{
printf("NO process in queue \n");
return 0;
}
else
{
enqueue(really , p);
printf("add a process into really queue process: PID = %d UID= %d \n" ,p->PID , p->UID);
return 1;
}
}
int wake()
{
PCB *p = dequeue(wait);
if(p == NULL)
{
printf("NO process in queue \n");
return 0;
}
else
{
enqueue(really , p);
printf("add a process into wait really process: PID = %d UID= %d \n" ,p->PID , p->UID);
return 1;
}
}
int block()
{
PCB *p = dequeue(excute);
if(p == NULL)
{
printf("NO process in queue \n");
return 0;
}
else
{
enqueue(wait , p);
printf("add a process into wait queue process: PID = %d UID= %d \n" ,p->PID , p->UID);
return 1;
}
}/*block*/
/*输出队列 outputqueue*/
int outputqueue(PCB *head)
{
PCB *p;
if(head -> next == NULL)
{/*队列为空*/
printf("queue is null \n");
return 1;
}
p = head -> next; /*node pointer*/
while(p)
{/*打印process id UID*/
printf("PID = %d UID = %d \n" , p -> PID , p -> UID);
p = p -> next;
}
return 0;
}
/*output输出*/
int output()
{
printf("REALLLY QUEUE:\n");
outputqueue(really);
printf("EXCUTE QUEUE: \n");
outputqueue(excute);
printf("WAIT QUEUE: \n");
outputqueue(wait);
}/*output*/
/*init 初始化*/
int init()
{
PCB *p;
clrscr();
really = (PCB*)malloc(sizeof(PCB));
really -> next=NULL;
excute = (PCB*)malloc(sizeof(PCB));
excute -> next=NULL;
wait = (PCB*)malloc(sizeof(PCB));
wait -> next = NULL;
printf("____________PROCESS SECHUDLE__________\n");
printf("now initing.....................\n");
printf("input PID and UID as integer , 0 0 as over\n");
while(1)
{
p = (PCB*)malloc(sizeof(PCB));
p -> next = NULL;
scanf("%d %d",&p -> PID , &p -> UID);
if(p -> PID == 0 && p -> UID == 0)
break;
else
{
if(enqueue(really , p))
{
printf("new process PID = %d UID = %d added!\n",p -> PID , p -> UID);
}
else return 0;
}
}
return 1;
}/*init*/
/*运行一个process*/
int run()
{
PCB *p = excute;
int s = SEC;
if(excute -> next == NULL)
{
printf("no process in excute queue \n");
return 0;
}
else
{
p = excute -> next;
printf("system will sleep %ds as process running\n",s);
sleep(3);/*sleep as process runing time*/
printf("process: PID = %d UID= %d excute successed..\n" , p -> PID , p -> UID );
excute -> next = p -> next;
free(p);
}
}/*run*/
/*离开*/
int leave()
{
PCB *p,*t;
while(really->next || excute->next || wait->next)
{
p = really -> next;
while(p)
{
t = p -> next;
free(p);
p = t;
}
really -> next = NULL;
p = wait -> next;
while(p)
{
t = p -> next;
free(p);
p = t;
}
wait -> next = NULL;
p = excute -> next;
while(p)
{
t = p -> next;
free(p);
p = t;
}
excute -> next = NULL;
}
exit(0);
}/*leace*/
int help()
{
printf("_____________________HELP MENU_____________________\n");
printf("\t-h HELP show help option\n");
printf("\t-c CREATE create a new process , and put to really queue\n");
printf("\t-b BLOCK block a process in excute queue\n");
printf("\t-w WAKE wake a process in wait queue\n");
printf("\t-e EXCUTE excute a process in really queue\n");
printf("\t-s SUSPEND suspend a process in excute queue\n");
printf("\t-o OUTPUT output all processes in queues\n");
printf("\t-r RUN excute a process in excute queue\n");
printf("\t-x EXIT exit this program\n");
printf("___________________________________________________\n");
printf("\t type 'H' will show this menu\n");
}/*help*/
int main()
{
char COMMAND = NULL;
if( init() != 1)
{
printf("init falied ! \n ");
getch();
exit(0);
}
else
{
printf("init...OK\n");
output();
help();
}
while(1)
{
/*当三队列都不空 执行调度 */
printf(">");
scanf("%c",&COMMAND);
switch(COMMAND)
{
case '\n': break;
case 'H':
case 'h': help(); break;
case 'C':
case 'c': create(); break;
case 'B':
case 'b': block(); break;
case 'W':
case 'w': wake(); break;
case 'S':
case 's': suspend(); break;
case 'E':
case 'e': fexcute(); break;
case 'O':
case 'o': output(); break;
case 'X':
case 'x': leave(); break;
case 'R':
case 'r': run(); break;
}
}
}/*main*/
本文作者:网友 来源:网络CG的技术博客
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