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

// Mos_sw.cpp: implementation of the CMos_sw class. 
// Code by Wang Hao. Released March,2002. 
// Copyright (C) 2002 by Wang Hao. 
// All rights reserved. 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "Mos.h" 
#include "Mos_sw.h" 
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
////////////////////////////////////////////////////////////////////// 
// Construction/Destruction 
////////////////////////////////////////////////////////////////////// 
extern CVCS m_cpu; 
extern PCB m_pcb; 
CMos_sw::CMos_sw() 
{ 
 
} 
 
CMos_sw::~CMos_sw() 
{ 
 
} 
 
void CMos_sw::idle() 
{ 
	m_UI.DealWithUI(_T("IDLE"),IDC_STATIC_CPU); 
	for(;;){ 
		m_cpu.clock(); 
		m_cpu.idletime++;//闲逛计数 
		if(m_cpu.Test()) 
			return; 
	} 
} 
 
void CMos_sw::run() 
{ 
	if(m_pcb.curr_pcb==NULL){ 
		idle();//有中断时返回 
		m_inth.interrupt_handle();//接着处理中断 
	} 
	else{ 
		  if(m_pcb.curr_pcb->pid>3)//处理用户进程 
		  {//恢复现场 
			  m_UI.DealWithUI(_T("USER"),IDC_STATIC_CPU); 
			  m_cpu.C = m_pcb.curr_pcb->regc; 
			  m_cpu.PC[0] = m_pcb.curr_pcb->regpc[0]; 
			  m_cpu.PC[1] = m_pcb.curr_pcb->regpc[1]; 
			  for(int i=0;i<=3;i++) 
				  m_cpu.R[i] = m_pcb.curr_pcb->regr[i]; 
			  m_cpu.PTR.op4 = m_pcb.curr_pcb->regptr[3]; 
			  m_cpu.PTR.op3 = m_pcb.curr_pcb->regptr[2]; 
			  m_cpu.PTR.op2 = m_pcb.curr_pcb->regptr[1]; 
			  m_cpu.PTR.op1 = m_pcb.curr_pcb->regptr[0]; 
		  } 
		  m_cpu.MODE = m_pcb.curr_pcb->mode; 
		  switch(m_pcb.curr_pcb->pid) 
		  { 
			case 1:m_UI.DealWithUI(_T("KERNEL"),IDC_STATIC_CPU);m_in.pre_input();break; 
			case 2:m_UI.DealWithUI(_T("KERNEL"),IDC_STATIC_CPU);m_jsw.jsw();break; 
			case 3:m_UI.DealWithUI(_T("KERNEL"),IDC_STATIC_CPU);m_out.delay_output();break; 
				//仅当自己睡眠后函数返回,接着转进程调度 
			case 4:case 5:case 6:case 7:case 8: 
				   m_cpu.VCS();//有中断时返回 
				   m_inth.interrupt_handle();//接着处理中断 
			default:break; 
		  } 
	}//end of else 
} 
 
void CMos_sw::swtch() 
{ 
	m_UI.DealWithUI(_T(" "),IDC_STATIC_CP); 
	m_pcb.curr_pcb = mos_proc.GetQueueHead(m_pcb.readypcbhead,m_pcb.readypcbtail,IDC_STATIC_RP); 
	if(m_pcb.curr_pcb != NULL&&m_pcb.curr_pcb->mode == USERMODE) 
		m_cpu.time = 10; 
	if(m_pcb.curr_pcb!=NULL) 
	{ 
		CString str; 
		str.Format("->P%d",m_pcb.curr_pcb->pid); 
		m_UI.DealWithUI(str,IDC_STATIC_CP); 
	} 
	else m_UI.DealWithUI(_T(" "),IDC_STATIC_CP); 
	run(); 
}