嵌入式操作系统-实验3-实验报告

信息学部软件学院嵌入式操作系统ADDINCNKISM.UserStyle北京工业大学2022-2023学年第一学期软件学院课程名称嵌入式操作系统报告性质实验三任课教师严海蓉课程性质专业选修课学分2.00学时32

实验题目：任务控制块的OS_Resume()、OS_Suspend()和信号量的发送OS_Sempend()函数要求：OS_Resume():任务恢复，可能恢复到就绪态也可能恢复后仍然在等待态。OS_Suspend():任务挂起。OS_Sempend():信号量的发送。代码：OS.cpp/*==========================================*任务控制块的OS_Resume()、OS_Suspend()*信号量的发送OS_Sempend()==========================================*/#include<stdio.h>#include<iostream>#include"Tasklist.h"#include<Task.h>#include<OSRdyTbl.h>#include<OS.h>Node*CurrentTCB=NULL;/***@brief任务恢复*@paramOSTCBWaitList任务等待链*@paramOSTCBReadyList任务就绪链*@paramOSTCBFreeList空任务表链*@paramOSTCB恢复的任务TCB*@paramOSTCBPrioTb1任务就绪组*@returnbool:true恢复到就绪态/false未能恢复到就绪态*/boolOS_Resume(Node**OSTCBWaitList,Node**OSTCBReadyList,Node**OSTCBFreeList,Node*OSTCB,Node*OSTCBPrioTb1[]){intsem;if(OSTCB==CurrentTCB)returnfalse;if(!OS_Sempend(OSTCB,&sem)){//判断任务是否被挂起if(sem==-1){OSTCB->sem++;OSTCB->sem++;//从挂起列表中移除intlocation[1]={0};DeletelistNodebyAdd(OSTCBWaitList,OSTCB);Node*TempNode[1]={OSTCB};if(OSTCB->priority<=CurrentTCB->priority){//完成一次任务切换//当前任务加入//OSTCB->m_lock.lock();TempNode[0]=CurrentTCB;InsertlistNode(OSTCBReadyList,TempNode,location,1);CreatTaskPriority(CurrentTCB->priority);OSTCBPrioTb1[CurrentTCB->priority]=CurrentTCB;CurrentTCB=OSTCB;//OSTCB->m_lock.unlock();}else{InsertlistNode(OSTCBReadyList,TempNode,location,1);CreatTaskPriority(OSTCB->priority);OSTCBPrioTb1[OSTCB->priority]=CurrentTCB;}returntrue;}else{OSTCB->sem++;OSTCB->sem++;returnfalse;}}}/***@brief任务挂起*@paramOSTCBFreeList空任务表链*@paramOSTCBWaitList任务等待链*@paramOSTCBReadyList任务就绪链*@paramOSTCB挂起的任务TCB*@paramOSTCBPrioTb1任务就绪组*/voidOS_Suspend(Node**OSTCBFreeList,Node**OSTCBWaitList,Node**OSTCBReadyList,Node*OSTCB,Node*OSTCBPrioTb1[]){intval=0;Node*TempNode[1]={NULL};intlocation[1]={0};OS_Sempend(OSTCB,&val);if(OSTCB==CurrentTCB){TempNode[0]=CurrentTCB;Node*highestpriorNode=NULL;InsertlistNode(OSTCBWaitList,TempNode,location,1);SuspendTaskPriority(CurrentTCB->priority);OSTCBPrioTb1[CurrentTCB->priority]=NULL;Findhighestprior(&highestpriorNode,OSTCBPrioTb1);DeletelistNodebyAdd(OSTCBReadyList,highestpriorNode);SuspendTaskPriority(highestpriorNode->priority);OSTCBPrioTb1[highestpriorNode->priority]=NULL;CurrentTCB=highestpriorNode;}elseif(val==0){//挂起队列TempNode[0]=OSTCB;InsertlistNode(OSTCBWaitList,TempNode,location,1);SuspendTaskPriority(OSTCB->priority);OSTCBPrioTb1[OSTCB->priority]=NULL;}}/***@brief任务信号量的发送*@paramOSTCB当前任务TCB*@paramval返回当前任务TCB信号量*@returnbool：true信号量可用/flase信号量不可用*/boolOS_Sempend(Node*OSTCB,int*val){//OSTCB->m_lock.lock();if(OSTCB->sem>0){//信号量可用OSTCB->sem--;*val=OSTCB->sem;//OSTCB->m_lock.unlock();returntrue;}else{//信号量不可用OSTCB->sem--;*val=OSTCB->sem;//OSTCB->m_lock.unlock();returnfalse;}}Node*getCurrentTCB(){returnCurrentTCB;}boolsetCurrentTCB(Node*OSTCB){CurrentTCB=OSTCB;returntrue;}main.cpp#include<stdio.h>#include<exception>#include<iostream>#include"Tasklist.h"#include<Task.h>#include<OS.h>#include<mutex>#include<OSRdyTbl.h>usingnamespacestd;Node*OSTCBFreeList=Creat_Tasklist(MAX_TASKLIST_NODE_NUM);Node*OSTCBReadyList=NULL;Node*OSTCBWaitList=NULL;Node*OSTCBPrioTb1[MAX_TASKLIST_NODE_NUM]={NULL};Node*highestpriorNode=NULL;intNode_Insert_Location[MAX_TASKLIST_NODE_NUM]={0};intmain(intargc,char*argv[]){/*===============================================*环境为优先级为5、7的就绪任务，*当前任务为优先级为6的任务*将优先级为5的任务挂起两遍*再将优先级为5的任务恢复两遍===============================================*/CreatTask(&OSTCBFreeList,&OSTCBReadyList,OSTCBPrioTb1,7);CreatTask(&OSTCBFreeList,&OSTCBReadyList,OSTCBPrioTb1,6);Findhighestprior(&highestpriorNode,OSTCBPrioTb1);//SuspendTask(&OSTCBFreeList,&OSTCBReadyList,OSTCBPrioTb1,highestpriorNode->priority);setCurrentTCB(highestpriorNode);CreatTask(&OSTCBFreeList,&OSTCBReadyList,OSTCBPrioTb1,5);Node*CurrentTCB=getCurrentTCB();DeletelistNodebyAdd(&OSTCBReadyList,CurrentTCB);SuspendTaskPriority(CurrentTCB->priority);OSTCBPrioTb1[CurrentTCB->priority]=NULL;Findhighestprior(&highestpriorNode,OSTCBPrioTb1);DeletelistNodebyAdd(&OSTCBReadyList,highestpriorNode);OS_Suspend(&OSTCBFreeList,&OSTCBWaitList,&OSTCBReadyList,highestpriorNode,OSTCBPrioTb1);CurrentTCB=getCurrentTCB();OS_Suspend(&OSTCBFreeList,&OSTCBWaitList,&OSTCBReadyList,highestpriorNode,OSTCBPrioTb1);CurrentTCB=getCurrentTCB();OS_Resume(&OSTCBWaitList,&OSTCBReadyList,&OSTCBFr