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ProcessManager.h
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118 lines (95 loc) · 2.53 KB
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/*
* Copyright (C) 2015 Niek Linnenbank
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __KERNEL_PROCESS_MANAGER_H
#define __KERNEL_PROCESS_MANAGER_H
#include <Types.h>
#include <MemoryMap.h>
#include "Process.h"
#include "Scheduler.h"
/** Maximum number of processes. */
#define MAX_PROCS 1024
/**
* Represents a process which may run on the host.
*/
class ProcessManager
{
public:
/**
* Constructor function.
*/
ProcessManager(Scheduler *scheduler);
/**
* Destructor function.
*/
virtual ~ProcessManager();
/**
* Get scheduler object
*
* @return Scheduler object instance
*/
Scheduler * getScheduler();
/**
* Create and add a new Process.
*/
Process * create(Address entry, const MemoryMap &map);
/**
* Retrieve a Process by it's ID.
* @param id ProcessID number.
* @return Pointer to the appropriate process or ZERO if not found.
*/
Process * get(ProcessID id);
/**
* Remove a Process.
*/
void remove(Process *proc, uint exitStatus = 0);
/**
* Schedule next process to run.
*/
void schedule(Process *proc = ZERO);
/**
* Set the idle process.
*/
void setIdle(Process *proc);
/**
* Current process running. NULL if no process running yet.
*/
Process * current();
/**
* Previous process running.
*/
Process * previous();
/**
* Retrieve the process table.
* @return Pointer to the process table.
*/
Vector<Process *> * getProcessTable();
private:
/** All known Processes. */
Vector<Process *> m_procs;
/** Object which selects processes to run. */
Scheduler *m_scheduler;
/** Currently executing process */
Process *m_current;
/** Previous process executing */
Process *m_previous;
/** Idle process */
Process *m_idle;
};
/**
* @}
*/
#endif /* __KERNEL_PROCESS_H */