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  • 大小: 2.04MB
    文件類型: .rar
    金幣: 2
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    發(fā)布日期: 2023-10-25
  • 語言: C/C++
  • 標(biāo)簽: 死鎖避免??死鎖避免??

資源簡介

本系統(tǒng)是為了能夠使操作系統(tǒng)的進(jìn)程能夠正確地共享資源，并且不會(huì)因?yàn)楣蚕碣Y源而陷入死鎖，對此，采用銀行家算法。把操作系統(tǒng)看作是銀行家，操作系統(tǒng)管理的資源相當(dāng)于銀行家管理的資金，進(jìn)程向操作系統(tǒng)請求分配資源相當(dāng)于用戶向銀行家貸款。操作系統(tǒng)按照銀行家制定的規(guī)則為進(jìn)程分配資源，當(dāng)進(jìn)程首次申請資源時(shí)，要測試該進(jìn)程對資源的最大需求量，如果系統(tǒng)現(xiàn)存的資源可以滿足它的最大需求量則按當(dāng)前的申請量分配資源，否則就推遲分配。當(dāng)進(jìn)程在執(zhí)行中繼續(xù)申請資源時(shí)，先測試該進(jìn)程已占用的資源數(shù)與本次申請的資源數(shù)之和是否超過了該進(jìn)程對資源的最大需求量。若超過則拒絕分配資源，若沒有超過則再測試系統(tǒng)現(xiàn)存的資源能否滿足該進(jìn)程尚需的最大資源量，若能滿足則按當(dāng)前的申請量分配資源，否則也要推遲分配

資源截圖

代碼片段和文件信息 

//?Banker.cpp?:?Defines?the?class?behaviors?for?the?application.
//

#include?“stdafx.h“
#include?“Banker.h“
#include?“BankerDlg.h“
#include?“initdlg.h“

#ifdef?_DEBUG
#define?new?DEBUG_NEW
#undef?THIS_FILE
static?char?THIS_FILE[]?=?__FILE__;
#endif
extern?int?ResourceNumber;
extern?int?ProcessNumber;
/////////////////////////////////////////////////////////////////////////////
//?CBankerApp

BEGIN_MESSAGE_MAP（CBankerApp?CWinApp）
	//{{AFX_MSG_MAP（CBankerApp）
		//?NOTE?-?the?ClassWizard?will?add?and?remove?mapping?macros?here.
		//????DO?NOT?EDIT?what?you?see?in?these?blocks?of?generated?code!
	//}}AFX_MSG
	ON_COMMAND（ID_HELP?CWinApp::onhelp）
END_MESSAGE_MAP（）

/////////////////////////////////////////////////////////////////////////////
//?CBankerApp?construction

CBankerApp::CBankerApp（）
{
	//?TODO:?add?construction?code?here
	//?Place?all?significant?initialization?in?InitInstance
}

/////////////////////////////////////////////////////////////////////////////
//?The?one?and?only?CBankerApp?object

CBankerApp?theApp;

/////////////////////////////////////////////////////////////////////////////
//?CBankerApp?initialization

BOOL?CBankerApp::InitInstance（）
{
	AfxEnableControlContainer（）;

	//?Standard?initialization
	//?If?you?are?not?using?these?features?and?wish?to?reduce?the?size
	//??of?your?final?executable?you?should?remove?from?the?following
	//??the?specific?initialization?routines?you?do?not?need.

#ifdef?_AFXDLL
	Enable3dControls（）;			//?Call?this?when?using?MFC?in?a?shared?DLL
#else
	Enable3dControlsStatic（）;	//?Call?this?when?linking?to?MFC?statically
#endif
	InitDlg?InitDlg;
	int?respone?=?InitDlg.DoModal（）;
	if（respone?==?IDOK）
	{
		ResourceNumber?=?InitDlg.m_Init_ResourceNumber;
		ProcessNumber?=?InitDlg.m_Init_ProcessNumber;
		CBankerDlg?dlg;
		m_pMainWnd?=?&dlg;
		SetDialogBkColor（RGB（192192192）RGB（00255））;
		int?nResponse?=?dlg.DoModal（）;
		if?（nResponse?==?IDOK）
		{
			//?TODO:?Place?code?here?to?handle?when?the?dialog?is
			//??dismissed?with?OK
		}
		else?if?（nResponse?==?IDCANCEL）
		{
			//?TODO:?Place?code?here?to?handle?when?the?dialog?is
			//??dismissed?with?Cancel
		}
		
	}
	
	//?Since?the?dialog?has?been?closed?return?FALSE?so?that?we?exit?the
	//??application?rather?than?start?the?application‘s?message?pump.
	return?FALSE;
}

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件?????????33??2010-07-07?09:15??Allocation.txt

?????文件??????????5??2010-07-07?10:14??Available.txt

?????文件?????????34??2010-07-07?09:16??Max.txt

?????文件?????????20??2010-07-11?22:00??ReadMe.txt

?????文件?????????33??2010-07-07?09:15??Banker\Allocation.txt

?????文件??????????5??2010-07-07?10:14??Banker\Available.txt

?????文件??????38780??2010-07-18?21:29??Banker\Banker.aps

?????文件???????2044??2010-07-18?21:29??Banker\Banker.clw

?????文件???????2390??2010-07-05?08:29??Banker\Banker.cpp

?????文件???????5593??2010-07-05?09:50??Banker\Banker.dsp

?????文件????????564??2010-07-04?14:55??Banker\Banker.dsw

?????文件???????1324??2010-07-04?14:45??Banker\Banker.h

?????文件?????492544??2010-07-18?21:29??Banker\Banker.ncb

?????文件??????49664??2010-07-18?21:29??Banker\Banker.opt

?????文件???????2500??2010-07-18?21:29??Banker\Banker.plg

?????文件??????11048??2010-07-18?21:29??Banker\Banker.rc

?????文件??????24393??2010-07-07?13:55??Banker\BankerDlg.cpp

?????文件???????2367??2010-07-07?09:37??Banker\BankerDlg.h

?????文件?????159861??2010-07-18?21:29??Banker\Debug\Banker.exe

?????文件?????315764??2010-07-18?21:29??Banker\Debug\Banker.ilk

?????文件??????39807??2010-07-18?21:29??Banker\Debug\Banker.obj

?????文件????5568864??2010-07-18?21:29??Banker\Debug\Banker.pch

?????文件?????435200??2010-07-18?21:29??Banker\Debug\Banker.pdb

?????文件???????4320??2010-07-18?21:29??Banker\Debug\Banker.res

?????文件?????131863??2010-07-18?21:29??Banker\Debug\BankerDlg.obj

?????文件??????25101??2010-07-18?21:29??Banker\Debug\font.obj

?????文件??????20542??2010-07-18?21:29??Banker\Debug\InitDlg.obj

?????文件?????147814??2010-07-18?21:29??Banker\Debug\msflexgrid.obj

?????文件??????17643??2010-07-18?21:29??Banker\Debug\picture.obj

?????文件??????13796??2010-07-18?21:29??Banker\Debug\rowcursor.obj

............此處省略26個(gè)文件信息

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