//----------------------------------------------------------------------------//
//                           GNU GPL OS/K                                     //
//                                                                            //
//  Authors:    spectral`                                                     //
//              NeoX                                                          //
//                                                                            //
//  Desc:       Scheduler header                                              //
//----------------------------------------------------------------------------//

#ifndef _KALKERN_BASE_H
#include <kernel/base.h>
#endif

//------------------------------------------//
//             Start of header              //
//------------------------------------------//

#ifndef _KALKERN_SCHED_H
#define _KALKERN_SCHED_H

//------------------------------------------//
//               Preprocessor               //
//------------------------------------------//

//
// Debug stuff
//
#define printdbg printf

//
// States for a process
//
#define STATE_RUNNING  0
#define STATE_RUNNABLE 1
#define STATE_BLOCKED  2

//
// Time in ticks a process should be run
//
#define DEF_PROC_TSLICE     5       // 20 ticks
#define TCR_PROC_TSLICE     20000   // 20000 ticks (time critical)

//------------------------------------------//
//               List heads                 //
//------------------------------------------//

DECLARE_PER_CPU(IdlePrioProcs, ListHead_t *);
DECLARE_PER_CPU(ReglPrioProcs, ListHead_t *);
DECLARE_PER_CPU(ServPrioProcs, ListHead_t *);
DECLARE_PER_CPU(TimeCritProcs, ListHead_t *);

extern const char *PrioClassesNames[];

//------------------------------------------//
//               Data types                 //
//------------------------------------------//

//
// A process
//
typedef struct sProcess_t {

    // Identifier
    int         pid;

    // Current priority class
    int         prioClass;

    // Default priority class (without boosts)
    int         defPrioClass;

    // Current priority level
    int         prioLevel;

    // Default priority level
    int         defPrioLevel;

    // Current state
    int         procState;

    // Remaining time running
    ulong       timeSlice;

    // Default time-slice
    ulong       defTimeSlice;

    // Scheduler internals
    ListNode_t *schedNode;

} Process_t;

//------------------------------------------//
//                Functions                 //
//------------------------------------------//

void SchedInit(void);
void SchedFini(void);

void SchedThisProc(Process_t *);
void SchedOnTick(void);

//------------------------------------------//
//              End of header               //
//------------------------------------------//

#endif