process.h

一个操作系统的源代码

/** process.h
 **
 ** Original Author: Guido de Jong
 ** Date: 11/04/99
 **
 ** Description:
 ** Process and ProcessQueue definitions
 ** 
 ** 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
 ** 2 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 or 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, write to the
 ** Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 ** Boston, MA 02111-1307 USA
 **
 *********************************************************Apostle OS**/

#ifndef __PROCESS_H_
#define __PROCESS_H_

#include <activation.h>
#include <tss.h>
#include <types.h>

typedef enum { None, Blocked, Unblocked, Preempted } UpcallType;

typedef struct process
{
  dword *addressSpace;
  dword allocated, deallocated;
  Activation *pendingActivation;
  UpcallType pendingUpcallType;
  dword upcallOffset;
  dword upcallCount;
  Activation *singleActivation;
  bool singleThreaded;
  ActivationQueue usedActivations;
  struct process *next; /* used by ProcessQueue */
} Process __attribute__ ((packed));

Process *NewProcess(void);
void    DeleteProcess(Process *p);
void    Upcall(Process *p, dword CPU, UpcallType ut, Activation *a);
#ifdef DEBUG
void    PrintProcess(Process *p);
#endif

typedef Process* ProcessQueue;

void    InsertProcess(ProcessQueue *q, Process *p, bool atHead);
Process *RemoveProcess(ProcessQueue *q);
#ifdef DEBUG
void    PrintProcessQueue(ProcessQueue q);
#endif

#endif