/*****************************************************************************************
 Copyright (c) 2002-2004 The UbixOS Project
 All rights reserved.

 Redistribution and use in source and binary forms, with or without modification, are
 permitted provided that the following conditions are met:

 Redistributions of source code must retain the above copyright notice, this list of
 conditions, the following disclaimer and the list of authors.  Redistributions in binary
 form must reproduce the above copyright notice, this list of conditions, the following
 disclaimer and the list of authors in the documentation and/or other materials provided
 with the distribution. Neither the name of the UbixOS Project nor the names of its
 contributors may be used to endorse or promote products derived from this software
 without specific prior written permission.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
 THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 $Id$

*****************************************************************************************/

#ifndef _SCHED_H
#define _SCHED_H

#ifdef __cplusplus
extern "C" {
#endif

#include <ubixos/types.h>
#include <ubixos/elf.h>
#include <vfs/file.h>
#include <sys/tss.h>


typedef enum { PLACEHOLDER=-2,DEAD=-1,NEW=0,READY=1,RUNNING=2,IDLE=3 } tState;

struct osInfo {
  struct mountPoints   *container;
  struct taskFileInfo   fileInfo;
  struct consoleStruct *terminal;
  uInt16                sectionCount;
  uInt8                 timer;
  uInt8                 v86Task;
  bool                  v86If;
  uInt32                curDir;
  uInt32                vmStart;
  uInt32                stdinSize;
  uInt32                controlKeys;
  char                 *stdin;
  char                 *cwd;
  };

typedef struct taskStruct {
  pidType           id;
  struct taskStruct *prev;
  struct taskStruct *next;
  struct tssStruct  tss;
  struct i387Struct i387;
  struct osInfo     oInfo;
  tState            state;
  uInt32            gid;
  uInt32            uid;
  uInt16            usedMath;
  uInt16            nice;
  uInt32            timeSlice;
  } kTask_t;

typedef struct prioQueue {
        kTask_t *start;
        kTask_t *end;
        struct prioQueue *next;
        struct prioQueue *prev;
        uInt32 prio;
} prioQueue_t;

#define MAXPRIOLEVELS 11

int schedInit();
void sched();
void schedYield();
void schedEndTask(pidType pid);
kTask_t *schedNewTask();
kTask_t *schedFindTask(uInt32 id);
int deleteTask(uInt32);

extern kTask_t *taskList;
extern uInt32  nextID;
extern kTask_t *_current;
extern kTask_t *_usedMath;

#ifdef __cplusplus
}
#endif

#endif

/***
 $Log$
 Revision 1.7  2004/06/18 13:01:47  solar
 Added nice and timeSlice members to the kTask_t type

 Revision 1.6  2004/06/17 02:12:57  reddawg
 Cleaned Out Dead Code

 Revision 1.5  2004/06/16 14:04:51  reddawg
 Renamed a typedef

 Revision 1.4  2004/06/14 12:20:54  reddawg
 notes: many bugs repaired and ld works 100% now.

 Revision 1.3  2004/05/21 15:49:13  reddawg
 The os does better housekeeping now when a task is exited

 Revision 1.2  2004/05/21 15:20:00  reddawg
 Cleaned up


 END
 ***/