#ifndef PROC_PROC_H_
#define PROC_PROC_H_

#include <stdint.h>
#include "hal/hal.h"
#include "spinlock/spinlock.h"
#include "bitmap/bitmap.h"

#define PROC_NAME_MAX 0x100

#define PROC_STACKBLOCKS 32
#define PROC_STACKSIZE (PROC_STACKBLOCKS * BITMAP_BLOCK_SIZE)

#define PROC_MAX 0x100 // max amount of processes

typedef struct {
  IntrStackFrame trapframe;
  uint8_t *kstack;
  PgTable *cr3;
} ProcPlatformData;

enum {
  PROC_READY,
  PROC_RUNNING,
  PROC_ZOMBIE,
  PROC_WAITING,
};

typedef struct Proc {
  struct Proc *next;
  uint64_t pid;
  char name[PROC_NAME_MAX];
  ProcPlatformData platformdata;
  uint8_t state;
  VasRange *vas;
  bool kern;
} Proc;

typedef struct {
  SpinLock spinlock;
  Proc *procs;
  Proc *current;
} Procs;

extern Procs PROCS;

void proc_init(void);
void proc_register(Proc *proc);
Proc *proc_spawnkern(void (*ent)(void), char *name);
Proc *proc_spawnuser(char *mountpoint, char *path);
void proc_sched(void *cpustate);
void proc_killself(void);
void proc_kill(Proc *proc);

#define PROC_DIE() \
  do { \
    proc_killself(); \
    for(;;); \
  } while(0)

#endif // PROC_PROC_H_