计算机操作系统 内存动态分配和回收模拟实现.doc

1、/COPYRIGHT 2010 tragedy ring finger. ALL RIGHTS RESERVED.include iomanip>#include <iostream>using namespace std;/¿ÕÏзÖÇø20¸ö£¬ÒÑ·ÖÅä·ÖÇø20¸östruct empty/¿ÕÏ

2、;зÖÇø±íint address_of_start； /ÆðʼµØÖ·int size_of_empty; /¿ÕÏдóСint next;int yesorno; /ÊÇ·ñ¿ÕÏÐ，1 ¿ÕÏУ¬Ó&#

3、208;Ч Empty20；struct not_empty/ÒÑ·ÖÅä·ÖÇø±íint pid；int address_of_start；int size_of_notempty；int next;int yesorno； /ÊÇ·ñ·ÖÅ䣬1 ·ÖÅä ÓÐЧ N

4、ot_Empty20；int CountOfEmpty=1,CountOfNotEmpty=0； /´Ó 0 ¿ªÊ¼¼ÆÊýint Min_Size = 2; /²»¿É·Ö¸îµÄ×îС·ÖÇøint Max_Size = 300； /×î´ó¿Õ

5、88;ä300 X 300 = 90000int Num_Of_Row = 30； /ÏÔʾʱ£¬ºáÅŸöÊýint Num_Of_Area = 20; /¿ÕÏзÖÇø ºÍ ·ÖÅä·ÖÇø µÄ×

6、8;´ó·ÖÇøÊýint enough（int Size_Of_NotEmpty） /ÊÇ·ñÓÐ×ã¹»µÄ¿ÕÏпռäint i;for （i=0;i<CountOfEmpty；i+） /Ê×´ÎÊÊÓ¦if （Emptyi

7、。size_of_empty = Size_Of_NotEmpty + Min_Size）return i;return 1;int where（int num ，int a） /ÕÒµ½ÆðʼµØַΪnumµÄÇøÓòµÄϱ꣬a0 = 1£¬ÔòÔ

8、18;Not_EmptyÖУ¬Ï±êΪa1£»a1 = 1 ÔÚEmptyÖУ¬Ï±êΪa0int i=0；while (i Num_Of_Area）if (Emptyi。address_of_start = num & Emptyi。yesorno = 1）a0 = i；a1 = 1;return 0;if (Not_Emptyi。ad

9、dress_of_start = num Not_Emptyi.yesorno = 1)a0 = -1;a1 = i;return 0;i += 1;return -1；int fenpei（）int temp,i；CountOfNotEmpty += 1；Not_EmptyCountOfNotEmpty。yesorno = 0;for (i=0;i<CountOfNotEmpty；i+)if (Not_Emptyi。yesorno = 0)cout<"ÊäÈë½ø³ÌID （0 99),&#

10、213;¼Óÿռä´óС（0 ”<Max_Size<”）n”；cin>>Not_Emptyi.pid>>Not_Emptyi。size_of_notempty;if （Not_Emptyi.pid 0 | Not_Emptyi.pid > 99)CountOfNotEmpty -= 1；cout<<"½ø³ÌºÅ 0 99n"；return -1；

11、for (int ii=0；ii<CountOfNotEmpty;ii+）if (Not_Emptyi。pid = Not_Emptyii.pid && i!= ii）CountOfNotEmpty -= 1；cout<”½ø³ÌºÅ±ØÐëΨһn”;return -1;temp = enough（Not_Emptyi.size_of_notempty);if (temp = 0） /ÕÒµ&#

12、189;ÄÜÂú×ãÇëÇóµÄ¿ÕÏзÖÇøNot_Emptyi.address_of_start = Emptytemp.address_of_start；Not_Emptyi。yesorno = 1；Emptytemp.address_of_start += Not_Emptyi。size_of_notempty；Emptytemp。size_of_empty = Not_Emptyi.s

13、ize_of_notempty;else CountOfNotEmpty = 1;cout<<”δÕÒµ½×ã¹»´óµÄ¿ÕÏзÖÇøn"；return -1；return 0;int front(int i，int a） /i Ϊ´ý»ØÊÕÇø&

14、#212;Ú Not_Empty ÖеÄϱꡣa´æ¶ÔӦϱêfor （int ii=0；ii<CountOfEmpty；ii+) /È·¶¨´ý»ØÊÕÇøÇ°Ò»¸ö·

15、4;ÇøÊÇ·ñÊÇ¿ÕÏзÖÇø£¬¼°·µ»Ø¿ÕÏзÖÇøµÄϱêif （Not_Emptyi。address_of_start = Emptyii。address_of_start + Emptyii。s

16、ize_of_empty&& Emptyii.yesorno = 1）a = ii；return 0；a = i; /Èç¹ûÇ°Ò»·ÖÇø²»ÊÇ¿ÕÏУ¬ÔòÇ°Ò»·ÖÇøÊÇÒÑ·ÖÅ

17、;䣬»ò´ý»ØÊÕÇøÊǵÚÒ»¸ö·ÖÇø¡£return -1；int back（int i，int& a) /i Ϊ´ý»ØÊÕÇøÔÚ Not_Empty ÖÐ&#

18、181;Äϱꡣa´æ¶ÔӦϱêfor (int ii= 0；ii<CountOfEmpty；ii+)if （Emptyii.address_of_start = Not_Emptyi。address_of_start + Not_Emptyi。size_of_notempty & Emptyii。yesorno = 1）a = ii；return 0;a = i;return 1；void swap

19、(int i ，int j,int sign）if (sign = 0）empty temp；temp = Emptyi；Emptyi = Emptyj；Emptyj = temp;elsenot_empty temp；temp = Not_Emptyi;Not_Emptyi =Not_Emptyj;Not_Emptyj = temp；void decrease_CountOfEmpty（）int i;for (i=0；i<CountOfEmpty;i+）if (Emptyi.yesorno = 0）swap（i，CountOfEmpty1，0）；CountOfEmpty = 1;bre

20、ak;void decrease_CountOfNotEmpty（)int i；for (i=0;i<CountOfNotEmpty；i+）if (Not_Emptyi。yesorno = 0）swap（i，CountOfNotEmpty-1,1)；CountOfNotEmpty = 1;break;int huishou()int pid,i,a，b；cout”ÊäÈëÒª»ØÊյĽø³ÌºÅ"

21、<endl;cin>>pid;for (i=0；i<CountOfNotEmpty;i+）if （Not_Emptyi。pid = pid）if （front（i,a） = 0) /´ý»ØÊÕ·ÖÇøÇ°ÃæÊÇ¿ÕÏзÖÇøEmptya.size_of_empty += Not_Emptyi.size_of_notempty;N

22、ot_Emptyi。yesorno = 0;if (back（i，b) = 0） /´ý»ØÊÕÇøºóÃæÊÇ¿ÕÏзÖÇøEmptya。size_of_empty += Emptyb。size_of_empty;Emptyb。yesorno = 0;/¿ÕÂú¿Õ »ØÊÕ

23、Ö®ºó ¿Õ decrease_CountOfNotEmpty(）；decrease_CountOfEmpty()；else /´ý»ØÊÕ·ÖÇøºóÃæû·ÖÇø,»òºóÃæÊÇÒÑ·ÖÅä

24、·ÖÇø/¿ÕÂú »ØÊÕÖ®ºó ¿Õ/¿ÕÂúÂú »ØÊÕÖ®ºó ¿ÕÂúdecrease_CountOfNotEmpty（）;else /´ý»ØÊÕ·

25、14;ÇøÇ°Ãæû·ÖÇø,»òÇ°ÃæÊÇÒÑ·ÖÅä·ÖÇøif （back(i，b) = 0） /´ý»ØÊÕÇøºóÃæÊÇ¿Õ

26、ÏзÖÇøEmptyb.address_of_start = Not_Emptyi。address_of_start;Emptyb.size_of_empty += Not_Emptyi.size_of_notempty;Emptyb.yesorno = 1；Not_Emptyi.yesorno = 0；/ÂúÂú¿Õ »ØÊÕÖ®ºó Âú¿Õ/

27、4;ú¿Õ »ØÊÕÖ®ºó ¿Õdecrease_CountOfNotEmpty()；else /´ý»ØÊÕ·ÖÇøºóÃæû·ÖÇø,»òºóÃæÊÇÒÑ

28、3;ÖÅä·ÖÇøa = 1;for (int ii=0;iiCountOfEmpty;ii+） /¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý

29、;¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ý¡ýif (Emptyii.yesorno = 0） /ÕÒÒ»¸öûÓõĿÕÏзÖÇ

30、48;±í£¬½«Ï±í·Ö¸øa£¬Èç¹û¶¼ÓÐÓ㬾ÍÀ©´ó¿ÕÏзÖÇø±íµÄ´óÐ&#

31、161;a = ii；break；if （a = 1）CountOfEmpty += 1； /ÕÒÒ»¸öûÓõĿÕÏзÖÇø±í£¬½«Ï±í·Ö¸øa£¬Èç¹û¶¼

32、ÓÐÓ㬾ÍÀ©´ó¿ÕÏзÖÇø±íµÄ´óСa = CountOfEmpty 1； /¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü

33、61;ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü¡ü

34、61;üEmptya。address_of_start = Not_Emptyi.address_of_start;Emptya.size_of_empty = Not_Emptyi。size_of_notempty；Emptya。yesorno = 1;Not_Emptyi.yesorno = 0;/ÂúÂúÂú¿Õ/Âú »ØÊÕÖ®ºó ¿Õ/ÂúÂ&

35、#250;ÂúÂú¿ÕÂú/ ÂúÂú¿ÕÂúdecrease_CountOfNotEmpty（）;/CountOfNotEmpty -= 1;»ØÊÕÖ®ºóÈÃÒÑ·ÖÅä·ÖÇøÊý¼õ

36、0;»£¬µ«ÊÇû¿¼Âǵ½¶ÔÓ¦Çé¿ö»áʹ¿ÕÏкͷÖÅäÇøÊýÁ¿±ä»ò²»

37、7;äreturn 0；void qsort_empty_address_of_start(empty a，int low，int high）int i = low，j = high;empty temp=alow；while(i<j）while（ij & temp。address_of_start= aj。address_of_start) j-;if(i<j）ai = aj；i+；while (i<j ai.address_of_start temp。address_of_start) i+；if（ij）aj = ai；j-；ai = temp;if(l

38、ow<i) qsort_empty_address_of_start(a,low，i1）；if(i<high） qsort_empty_address_of_start（a,j+1，high）;void show（）int a2,num = 0，i,count = 0,times=0;cout"n* Memory State *n"<endl;while （count Max_Size）where（num,a）；if (a0 > a1)for （i=0;i<Emptya0。size_of_empty；i+）cout<"¡ð”；count += 1;if (count）% Num_Of_Row