/* Copyright (C) 2008  Emmanuel Varoquaux

   This file is part of XOS.

   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 CURRENT_H
#define CURRENT_H

#include <current.h>

struct proc_struct;
struct proc_group_struct;
struct registers_struct;
struct interrupted_instruction_struct;
struct file_descr_struct;

/* nature */
int is_idle();

/* attributs */
void change_set_proc_group(struct proc_group_struct *proc_group);
int change_create_proc_group();
int change_wd(const char *fs_path);

/* descripteurs de fichiers */
int alloc_fd(int start, struct file_descr_struct *file_descr, int *fd);
void free_fd(int fd);
struct file_descr_struct *get_file_descr(int fd);

/* programme */
int exec(const char *fs_filename, char *const fs_argv[], char *const fs_envp[], struct registers_struct *registers, struct interrupted_instruction_struct *interrupted_instruction, int *status);
int sbrk(int increment, unsigned long *brk);

/* fils */
int fork(const struct registers_struct *registers, const struct interrupted_instruction_struct *interrupted_instruction);
int is_child(const struct proc_struct *proc);
int change_set_child_proc_group(struct proc_struct *child, struct proc_group_struct *proc_group);
int change_create_child_proc_group(struct proc_struct *child);
int wait(struct proc_struct *child, int *status, int options);
int wait_group_any(struct proc_group_struct *proc_group, int *status, int options);
int wait_any(int *status, int options);

/* orphelins */
int is_orphaned_proc_group(const struct proc_group_struct *proc_group);
void reap_orphan_zombies();

/* terminaison */
void exit(int code) __attribute__ ((noreturn));
void abort(int sig) __attribute__ ((noreturn));

/* divers */
void *memory_map(void *addr, unsigned int len, int prot, int fd, long off);
int memory_unmap(void *addr, unsigned int len);
int memory_protect(void *addr, unsigned int len, int prot);
int handle_page_fault(int cause, int access, unsigned long stack_top, unsigned long laddr);
void yield();

#endif