www.pudn.com > Mos.rar > Mos_io.cpp

// Mos_io.cpp: implementation of the CMos_io class. 
// Author:Wu Yong&Wang Hao  Released:March,2002. 
// Copyright (c) By Wu Yong&Wang Hao 2002. 
// All rights reserved. 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "Mos.h" 
#include "Mos_io.h" 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
CMos_io m_io; 
extern PCB m_pcb; 
extern CVCS m_cpu; 
extern CMos_stor m_stor; 
CMos_io::CMos_io() 
{ 
 
} 
 
CMos_io::~CMos_io() 
{ 
 
} 
 
void CMos_io::ioreq(int chno) 
{ 
	CString str; 
	iorbtype* iorb = new iorbtype; 
	iorb->pcb = m_pcb.curr_pcb; 
	m_pcb.curr_pcb->iorbp = iorb; 
	mos_proc.sleep(chno); 
	m_cpu.CHST[chno-1] = BUSY; 
	m_UI.DealWithUI(_T("BUSY"),IDC_STATIC_KBS+chno-KB); 
	if(CHHEAD[chno-1] == NULL) 
	{ 
		CHHEAD[chno-1] = CHTAIL[chno-1] = iorb; 
		iorb->link = NULL; 
		if(chno < 3) 
			m_cpu.CHCOUNT[chno-1] = 3; 
		else m_cpu.CHCOUNT[chno-1] = 1; 
		str.Format("%d",m_cpu.CHCOUNT[chno-1]); 
		m_UI.DealWithUI(str,IDC_STATIC_IOKB-chno+KB); 
	} 
	else{ 
			CHTAIL[chno-1]->link = iorb; 
			CHTAIL[chno-1] = CHTAIL[chno-1]->link; 
			iorb->link = NULL; 
	} 
} 
 
void CMos_io::wdsk(int n,char *buffer,int rec1,int &rec2)//返回－1为已经写完 
{ 
	if(n>10||rec1>99||rec1<0||dsk==NULL) return;//错误情况 
	m_UI.FillList(rec1,buffer,IDC_LIST2); 
	fseek(dsk,rec1*sizeof(word)*10,SEEK_SET);//转到所要到的页 
	fwrite(buffer,sizeof(word),n,dsk);//写入信息 
	if(m_stor.DSKMTB[rec1].forwp==NULL)//写入的下一磁道 
		rec2=-1; 
	else 
		rec2=(m_stor.DSKMTB[rec1].forwp)->index; 
	m_cpu.io++; 
	ioreq(IORESTDSK); 
} 
 
void CMos_io::wdsk(int n,char *buffer,int rec1) 
{ 
	if(n>10||rec1>99||rec1<0||dsk==NULL) return;//错误情况 
	m_UI.FillList(rec1,buffer,IDC_LIST2); 
	fseek(dsk,rec1*sizeof(word)*10,SEEK_SET);//转到所要到的页 
	fwrite(buffer,sizeof(word),n,dsk);//写入信息 
	m_cpu.io++; 
	ioreq(IORESTDSK); 
} 
 
void CMos_io::wprtln(char *buffer) 
{ 
	if(print!=NULL) 
	{ 
		fwrite(buffer,sizeof(char),strlen(buffer),print); 
		fwrite("\n",sizeof(char),1,print); 
		m_cpu.io++; 
		ioreq(IORESTPRT); 
	} 
} 
 
void CMos_io::rdsk(int n,char *buffer,int rec1,int &rec2) 
{ 
	if(n>10||rec1>99||rec1<0||dsk==NULL) return; 
	fseek(dsk,rec1*sizeof(word)*10,SEEK_SET); 
	fread(buffer,sizeof(word),n,dsk); 
	if(m_stor.DSKMTB[rec1].forwp==NULL) 
		rec2=-1; 
	else 
		rec2=(m_stor.DSKMTB[rec1].forwp)->index; 
	m_cpu.io++; 
	ioreq(IORESTDSK); 
} 
 
void CMos_io::rkbln(char *buffer) 
{ 
	if(kb!=NULL) 
	{ 
		fgets(buffer,40,kb); 
		int length=strlen(buffer)-1;//备用 
		m_cpu.io++; 
		ioreq(IORESTKB); 
	} 
}