进程的唤醒与阻塞

1、进程的唤醒与阻塞 #include<stdio.h>#include<stdlib.h>#include<string.h>struct jincheng_typeint pid;int youxian;int zhuangtai;/标志进程状态，0为不存在内存，1为在内存，3为挂起char info10;struct jincheng_type neicun20;int shumu=0,guaqi=0,pid,flag=0;void create()if(shumu>=20) printf(&a

2、mp;quot;n内存已满，请先换出或杀死进程n");elsefor(int i=0;i<20;i+)/定位，找到可以还未创建的进程if(neicuni.zhuangtai=0) break;printf("n请输入新进程pidn");scanf("%d",&(neicuni.pid);for(int j=0;j<i;j+)if(neicuni.pid=neicunj.pid)printf("n该进程已存在n");return

3、;printf("n请输入该进程的优先级n");scanf("%d",&(neicuni.youxian);printf("n请输入该进程的大小n");scanf("%d",&(neicuni.daxiao);printf("n请输入新进程的内容n");scanf("%s",&();/创建进程，使标记为1nei

4、cuni.zhuangtai=1;shumu+;void run()for(int i=0;i<20;i+)if(neicuni.zhuangtai=1)/输出运行进程的各个属性值printf("n pid=%d",neicuni.pid);printf("youxian=%d",neicuni.youxian);printf("daxiao=%d",neicuni.daxiao);printf("zhuangtai=%d",neicun

5、i.zhuangtai);printf("info=%s",);flag=1;if(!flag)printf("n当前没有运行的进程n");void huanchu()if(!shumu)printf("当前没有运行的进程n");return;printf("n");printf("n");scanf("%d",&pid);for(int i

6、=0;i<20;i+)/定位，找到所要换出的进程，根据其状态做相应的处理if(pid=neicuni.pid)if(neicuni.zhuangtai=1)neicuni.zhuangtai=2;guaqi+;printf("n已成功换出进程n");else if(neicuni.zhuangtai=0) printf("n要换出的进程不存在n");else printf("n要换出的进程已被挂起n");flag=1;brek;/找不到，则说明进程不存在if(flag=0)

7、 printf("n要换出的进程不存在n");void kill()if(!shumu)printf("当前没有运行的进程n");return;printf("n ");scanf("%d",&pid);for(int i=0;i<20;i+)/定位，找到所要杀死的进程，根据其状态做相应的处理if(neicuni.pid)if(pid=neicuni.zhuangtai=1)neicuni.zhuangtai=0;shum

8、u-;printf("n已成功杀死进程n");else if(neicuni.zhuangtai=0) printf("n要杀死的进程不存在n");else printf("n要杀死的进程已被挂起n");flag=1;break;/找不到，则说明进程不存在if(!flag)printf("n要杀死的进程不存在n");void huanxing()if(!shumu)printf("当前没有运行的进程n");retur

9、n;if(!guaqi)printf("当前没有挂起的进程n");return;printf("n输入pidn");scanf("%d",&pid);for(int i=0;i<20;i+)/定位， 找到所要换出的进程，根据其状态做出相应的处理if(pid=neicuni.pid)flag=false;if(neicuni.zhuangtai=2)neicuni.zhuangtai=1;gauqi-;printf("n已成功换出进程n&am

10、p;quot;);else if(neicuni.zhuangtai=0) printf("n要换出的进程不存在n");else printf("n要换出的进程已被挂起n");break;/找不到，则说明进程不存在if(flag) printf("n要换出的进程不存在n");void main()int n=1;int sum;/一开始所有进程都不在内存中for(int i=0;i<20;i+)neicuni.zhuangtai=0;while(n)printf(&

11、quot;n*");printf("n* 进程演示系统 *");printf("n*");printf("n* 1.创建新的进程 *");printf("n* 2.换出某个进程 *");printf("n* 3.唤醒某个进程 *");printf("n*");printf("n请选择(16)n");scanf("%d&qu