操作系统源代码

}#include<stdio.h> #include<time.h>#include<stdlib.h> int memoryStartAddress = -1; int memorySize = -1; struct jobList /* 作业 ID */int size; /* 作业大小（需要的存储空间大小） */ int status; /* 作业状态 0 : new job ,1 : in the memory , 2 : finished . *//* 分区起始地址 */ /* 分区中存放作业 ID */ /* 分区链表指针 *//*出现严重错误时显示信息并结束程序{printf("\n\tError !\a"); printf("\nPress any key toexit !"); getch(); exit(1);}void openFile(FILE **fp,char *filename,char *mode)/* 以要求的方式打开文件 */{if((*fp = fopen(filename,mode)) == NULL){printf("\nCan't open %s in mode %s.",filename,mode); errorMessage();int id;struct jobList *next; }; struct freeList/* 作业链表指针 */ {int startAddress; /* 分区起始地址 */int size; struct freeList*next; }; struct usedList/* 分区大小 */ /* 分区链表指针 */{int startAddress;int jobID;struct usedList *next; };void errorMessage(void)*/}void makeFreeNode(struct freeList **empty,int startAddress,int size)/* 根据参数startAddress、size 创建空闲节点，由empty 指针返回*/ {if((*empty = malloc(sizeof(struct freeList))) == NULL){ printf("\nNot enough to allocate for the free node ."); errorMessage();}(*empty)->startAddress = startAddress;(*empty)->size = size;(*empty)->next = NULL;}void iniMemory(void) /* 初始化存储空间起始地址、大小*/{char MSA[10],MS[10];printf("\nPlease input the start address of the memory !"); scanf("%s",MSA); memoryStartAddress = atoi(MSA); printf("\nPlease input the size of the memory !");scanf("%s",MS);memorySize = atoi(MS);}char selectFitMethod(void) /* 选择适应算法*/{FILE *fp;char fitMethod;do{ printf("\n\nPlease input a char as fallow to select the fit method !\ \n 1 (Best fit) \\n 2 (Worst fit) \\n 3 (First fit) \\n 4 (Last fit)\n"); fitMethod = getche();}while(fitMethod < '1' || fitMethod > '4'); openFile(&fp,"d:\\result.cl","a"); switch(fitMethod) {case '1': fprintf(fp,"\n\n\n\n\tBest fit");fprintf(fp,"\n **********************************************");break;case '2':fprintf(fp,"\n\n\n\n\tWorst fit");fprintf(fp,"\n **********************************************");break;case '3':fprintf(fp,"\n\n\n\n\tFirst fit"); fprintf(fp,"\nbreak;case '4': fprintf(fp,"\n\n\n\n\tLast fit");break;}fclose(fp);return fitMethod;}void inputJob(void) /* 从键盘输入作业到 D 盘的 JOB 文件 */ { int /*id,size, */status = 0,jobnum = 0; FILE *fp;char id[10],size[10]; openFile(&fp,"d:\\job.cl","w"); fprintf(fp,"job_ID\tsize\tstatus"); printf("\n\n\n\nPlease input the jobs as fallow !\\nEnter a integer smaller than 1 to quit .\njob_ID\tsize\n"); do{ /* scanf("%d%d",&id,&size); */ scanf("%s\t%s",id,size); if(atoi(id) > 0 &&atoi(size) > 0) {fprintf(fp,"\n%s\t%s\t%d",id,size,status);/* fprintf(fp,"\n%d\t%d\t%d",id,size,status); */ jobnum++;}else break; }while(1);if(jobnum) printf("\nFinished to input the jobs !"); else{printf("\nNo job was given ."); errorMessage();}fclose(fp);}int makeJobList(struct jobList **jobs)/* 从 JOB 文件中读出作业并创建作业链表 */ {char jobID[10],size[10],status[10]; struct jobList *rear; FILE *fp;);fprintf(fp,"\n **********************************************H );openFile(&fp,"d:\\job.cl","r"); fscanf(fp,"%s%s%s",jobID,size,status);if((*jobs = malloc(sizeof(struct jobList))) == NULL){ printf("\nNot enough to allocate for the job ."); fclose(fp);errorMessage();}rear = *jobs;(*jobs)->next = NULL; while(!feof(fp)){struct jobList *p; fscanf(fp,"%s%s%s",jobID,size,status);if((p = malloc(sizeof(struct jobList))) == NULL) {printf("\nNot enough to allocate for the job ."); fclose(fp);errorMessage();} p -> next = rear -> next; rear -> next = p; rear = rear -> next; rear -> id = atoi(jobID);rear -> size = atoi(size);rear -> status = atoi(status);}fclose(fp);return 0;}int updateJobFile(struct jobList *jobs) /* 更新作业链表中作业的状态*/{FILE *fp;struct jobList *p;openFile(&fp,"d:\\job.cl","w"); fprintf(fp,"job_ID\tsize\tstatus"); for(p = jobs -> next;p;p = p -> next)fprintf(fp,"\n%d\t%d\t%d",p->id,p->size,p->status);fclose(fp);return 0;}int showFreeList(struct freeList *empty) /* 空闲分区队列显示*/{FILE *fp;struct freeList *p = empty -> next;int count = 0; openFile(&fp,"d:\\result.cl","a");fprintf(fp,"\n\nNow show the free list..."); printf("\n\nNow show the free list...");if(p){ fprintf(fp,"\nnumber\tsize\tstartAddress"); printf("\nnumber\tsize\tstartAddress");for(;p;p = p -> next){fprintf(fp,"\n%d\t%d\t%d",++count,p -> size,p -> startAddress);printf("\n%d\t%d\t%d",count,p -> size,p -> startAddress);}fclose(fp);return 1;}elsefprintf(fp,"\nThe memory was used out !");printf("\nThe memory was used out !"); fclose(fp);return 0;} } void getJobInfo(struct jobList *jobs,int id,int *size,int *status)/* 获取作业的信息*/ {struct jobList *p = jobs->next; while(p && p->id != id) p = p->next;if(p == NULL){ printf("\nCan't find the job which id is : %d .",id); errorMessage();}else{*size = p -> size; *status = p -> status;}}void updateJobStatus(struct jobList **jobs,int id,int status){struct jobList *p = (*jobs)->next; while(p && p->id != id) p = p->next;if(p == NULL){ printf("\nCan't find the job which id is : %d .",id); errorMessage();}else p -> status = status;}int showUsedList(struct jobList *jobs,struct usedList *used)/* 作业占用链表显示*/{FILE *fp;struct usedList *p = used -> next;int count = 0,size,status; openFile(&fp,"d:\\result.cl","a"); fprintf(fp,"\n\nNow show the used list..."); printf("\n\nNow show the used list...");if(p){ fprintf(fp,"\nnumber\tjobID\tsize\tstartAddress");printf("\nnumber\tjobID\tsize\tstartAddress"); for(;p;p = p -> next){ getJobInfo(jobs,p -> jobID,&size,&status);fprintf(fp,"\n%d\t%d\t%d\t%d",++count,p->jobID,size,p-> startAddress);printf("\n%d\t%d\t%d\t%d",count,p->jobID,size,p-> startAddress);} fclose(fp); return 1;}else{fprintf(fp,"\nNo job in the memory ! You should input some jobs to it.");printf("\nNo job in the memory ! You should input some jobs to it."); fclose(fp);return 0;}}int showJobList(struct jobList *jobs) /* 显示作业链表*/{struct jobList *p; p = jobs->next; if(p == NULL) {printf("\nNo job in the list ! Try again next time."); return 0;} printf("\n\nThe job list is as fallow :\njob_ID\tsize\tstatus"); while(p) { printf("\n%d\t%d\t%d",p->id,p->size,p->status); p = p->next;}return 1;}void moveFragment(struct jobList *jobs,struct freeList **empty,struct usedList **used) {int size,status;struct usedList *p;int address = memoryStartAddress;/* 全局变量，初始化时分配存储空间始址*/if((*empty)->next == NULL) /* 空闲分区链表为空，提示并返回*/{printf("\nThe memory was used out at all.\nMay be you should finish some jobs first or press any key to try again !");getch();return;}for(p = (*used) -> next;p;p = p-> next)/* 循环的修改占用分区的始址*/{p -> startAddress = address; getJobInfo(jobs,p -> jobID,&size,&status);/* 由作业ID 获得作业大小*/ address += size;}(*empty)->next->startAddress = address;/* 修改空闲分区的首节点始址、大小*/(*empty) -> next -> size = memorySize - (address - memoryStartAddress);(*empty) -> next -> next = NULL;/* 删除首节点后的所有节点*/}void order(struct freeList **empty,int bySize,int inc){struct freeList *p,*q,*temp;int startAddress,size;for(p = (*empty) -> next;p;p = p -> next){ /* 按bySize 和inc 两个参数寻找合适的节点，用temp 指向它*/ for(temp = q = p;q;q = q -> next)switch(bySize){{{case 0 : switch(inc){case 0:if(q->size < temp->size) temp = q;break;default:if(q->size > temp->size) temp = q;break;} break; default:switch(inc){case 0:if(q->startAddress < temp->startAddress) temp =q;break;default:if(q->startAddress > temp->startAddress) temp =q;break;} break;}} /* 交换节点的成员值*/ if(temp != p){ startAddress = p->startAddress; size = p->size;p->startAddress = temp->startAddress; p->size = temp->size;temp->startAddress = startAddress; temp->size = size;}}}int allocate(struct freeList **empty,int size)/* 为作业分配存储空间、状态必须为0*/{struct freeList *p,*prep;int startAddress = -1;p = (*empty) -> next; while(p && p->size < size) p = p -> next; if(p != NULL)if(p -> size > size){startAddress = p -> startAddress;p -> startAddress += size;p -> size -= size;}else{startAddress = p -> startAddress;prep = *empty; while(prep -> next != p) prep = prep -> next;prep -> next = p -> next;free(p);}}else printf("\nMay be you should move the fragment together ."); /* Unsuccessful ! */ return startAddress;}void insertUsedNode(struct usedList **used,int id,int startAddress) /* 插入释放的空间到USed链表中(作业号为id , StartAddreSS由函数13返回)*/{StrUct USedLiSt *q,*r,*prer;if((q = malloc(Sizeof(StrUct USedLiSt))) == NULL){printf("\nNot enoUgh to allocate for the USed node .");errorMeSSage();}q -> StartAddreSS = StartAddreSS;q -> jobID = id;prer = *USed;r = (*USed) -> next;while(r && r->StartAddreSS < StartAddreSS){prer = r;r = r -> next;}q -> next = prer -> next;prer -> next = q;}int finiShJob(StrUct USedLiSt **USed,int id,int *StartAddreSS)/* 结束一个作业号为id 的作业，释放存储空间(由*startAddress 返回空间的起始地址) */ {struct usedList *p,*prep;prep = *used;p = prep -> next;while(p && p -> jobID != id){prep = p; p = p -> next;}if(p == NULL){ printf("\nThe job which id is : %d is not in the memory !",id); return 0;}else{ *startAddress = p->startAddress; prep -> next = p -> next; free(p); return 1;}}void insertFreeNode(struct freeList **empty,int startAddress,int size)/* 插入回收的空节点分区，处理回收分区与空闲分区的四种邻接关系。