課程設(shè)計-模擬銀行家算法避免死鎖(編輯修改稿)
2025-02-09 18:59 本頁面
【文章內(nèi)容簡介】 in。i++) Work[i]=Available[i]。 //工作分配初始化為系統(tǒng)可用資源 for(i=0。im。i++) //掃描所有進程，預(yù)設(shè)所有進程不能運行 { Finish[i]=False。 } for(i=0。im。i++) { // if(Finish[i]==True) { continue。 } else //對于未運行的進程，進行如下處理 {/// for(j=0。jn。j++)//找到一個滿足Finish[i]=false且Need[i][j]=Work[j]的進程 { if(Need[i][j]Work[j])//由于部分資源得不到滿足，進程i無法運行 { break。 } } if(j==n)//進程各類資源全部得到滿足 { Finish[i]=True。 for(k=0。kn。k++)//進程i正常運行后，釋放其占有的資源 { Work[k]+=Allocation[i][k]。 //工作分配加上可用資源 } Sequence[l++]=i。 //模擬資源分配序列生成 i=1。 //重新掃描所有進程從i=0開始 } else { //某一資源得不到滿足 continue。 //試探下一個進程 } }// if(l==m)//都試探完畢 { cout系統(tǒng)安全!endl。 cout安全序列：。 for(i=0。il。i++) //輸出安全序列 cout進程PSequence[i] 。 coutendl。 return 0。 } }// cout系統(tǒng)進入不安全狀態(tài)！endl。 return 1。}分析：輸入各進程的可利用資源Available，最大需求MAX，已分配資源Allocation ，需求資源Need，之后各系統(tǒng)發(fā)出資源請求Request，利用實驗中的安全性算法判斷能否產(chǎn)生一個安全性隊列，若能，則給該進程分配成功，否則，不予分配。在確定安全序列的過程中，要檢測所有進程的Finish[i]的值，每次循環(huán)檢測完后要重復(fù)從第一個進程開始。 七、運行結(jié)果 假設(shè)輸入進程個數(shù)為5，資源種類數(shù)為3，并以此輸入各進程初始時刻的各種資源數(shù)量 ，如下 若再繼續(xù)申請資源，假設(shè)為P4 ，申請資源（1 2 2） 假設(shè)P1 申請資源（2 2 4）有 八、心得體會 經(jīng)過這次操作系統(tǒng)課程設(shè)計，讓我受益匪淺，收獲頗多。主要體會如下：++編譯程序編寫銀行家算法，進一步理解到通過銀行家算法避免死鎖的思想,同時也理解了系統(tǒng)死鎖產(chǎn)生的原因及條件。，分別定義了三個函數(shù)，init()初始化函數(shù),safealg()安全性算法函數(shù)，bank（）銀行家算法函數(shù)，體現(xiàn)了函數(shù)的模塊化思想。這樣的話，不僅提高了程序的可讀性和可操作性，而且還提高了CPU的利用率和內(nèi)存的利用率，因為程序的運行是局部性的，這種思想對于段頁式存儲管理系統(tǒng)尤為重要。，鍛煉了自己糾錯能力和搜索有價值信息的能力及自學(xué)的能力，并且進一步鞏固了自己以前學(xué)過的專業(yè)知識。g an employment tribunal claimEmployment tribunals sort out disagreements between employers and employees.You may need to make a claim to an employment tribunal if: you don39。t agree with the disciplinary action your employer has taken against you your employer dismisses you and you think that you have been dismissed unfairly.For more information about dismissal and unfair dismissal, seeDismissal.You can make a claim to an employment tribunal, even if you haven39。tappealedagainst the disciplinary action your employer has taken against you. However, if you win your case, the tribunal may reduce any pensation awarded to you as a result of your failure to appeal.Remember that in most cases you must make an application to an employment tribunal within three months of the date when the event you are plaining about happened. If your application is received after this time limit, the tribunal will not usually accept it.If you are worried about how the time limits apply to you, take advice from one of the organisations listed underFurther help.Employment tribunals are less formal than some other courts, but it is still a legal process and you will need to give evidence under an oath or affirmation.Most people find making a claim to an employment tribunal challenging. If you are thinking about making a claim to an employment tribunal, you should get help straight away from one of the organisations listed underFurther help.If you are being represented by a solicitor at the tribunal, they may ask you to sign an agreement where you pay their fee out of your pensation if you win the case. This is known as adamagesbased agreement. In England and Wales, your solicitor can39。t charge you mo
畢業(yè)設(shè)計相關(guān)推薦
鄂ICP備17016276號-1