ProcessManager.h

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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 <Vector.h>
#include <List.h>
#include <Queue.h>
#include "Process.h"
 
/* Forward declarations */
class Scheduler;
 
#define MAX_PROCS 1024
 
class ProcessManager
{
  public:
 
    enum Result
    {
        Success,
        InvalidArgument,
        IOError,
        WakeupPending,
        AlreadyExists
    };
 
  public:
 
    ProcessManager();
 
    virtual ~ProcessManager();
 
    Process * create(const Address entry,
                     const MemoryMap &map,
                     const bool readyToRun = false,
                     const bool privileged = false);
 
    Process * get(const ProcessID id);
 
    void remove(Process *proc, const uint exitStatus = 0);
 
    Result schedule();
 
    Result wait(Process *proc);
 
    Result stop(Process *proc);
 
    Result resume(Process *proc);
 
    Result reset(Process *proc, const Address entry);
 
    Result sleep(const Timer::Info *timer = 0, const bool ignoreWakeups = false);
 
    Result wakeup(Process *proc);
 
    Result raiseEvent(Process *proc, const struct ProcessEvent *event);
 
    Result registerInterruptNotify(Process *proc, const u32 vector);
 
    Result unregisterInterruptNotify(Process *proc);
 
    Result interruptNotify(const u32 vector);
 
    void setIdle(Process *proc);
 
    Process * current();
 
  private:
 
    Result enqueueProcess(Process *proc, const bool ignoreState = false);
 
    Result dequeueProcess(Process *proc, const bool ignoreState = false) const;
 
  private:
 
    Index<Process, MAX_PROCS> m_procs;
 
    Scheduler *m_scheduler;
 
    Process *m_current;
 
    Process *m_idle;
 
    Queue<Process *, MAX_PROCS> m_sleepTimerQueue;
 
    Vector<List<Process *> *> m_interruptNotifyList;
};
 
#endif /* __KERNEL_PROCESS_MANAGER_H */