scheduler.cc.svn-base

来自「德国Erlangen大学教学操作系统源码。」· SVN-BASE 代码 · 共 58 行

/*****************************************************************************/
/* Betriebssysteme                                                           */
/*---------------------------------------------------------------------------*/
/*                                                                           */
/*                          S C H E D U L E R                                */
/*                                                                           */
/*---------------------------------------------------------------------------*/
/* Implementierung des Schedulers.                                           */
/*****************************************************************************/

#include "thread/scheduler.h"

Scheduler::Scheduler()
	: tasks(), task(0)
{
}

Scheduler::Scheduler(Scheduler &obj)
{
}

Scheduler::~Scheduler()
{
}

void Scheduler::ready(Entrant& that)
{
	tasks.enqueue(&that);
}

void Scheduler::schedule()
{
	Entrant *next = static_cast<Entrant*>(tasks.dequeue());
	dispatch(*next);
}

void Scheduler::exit()
{
	schedule();
}

void Scheduler::kill(Entrant& that)
{
	Entrant *last = static_cast<Entrant*>(active());
	if(&that == last)
		exit();
	else
		tasks.remove(&that);
}

void Scheduler::resume()
{
	*(((char*)0xb8000)+82) = tasks.size()+'0';
	Entrant *last = static_cast<Entrant*>(active());
	tasks.enqueue(last);
	schedule();
}