monolithium/kernel/include/object.h

/*
 * object.h
 *
 * Copyright (C) 2013 Aleksandar Andrejevic <theflash@sdf.lonestar.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef _OBJECT_H_
#define _OBJECT_H_

#include <common.h>
#include <lock.h>
#include <sdk/object.h>
#include <sdk/list.h>
#include <sdk/user.h>

typedef struct
{
    list_entry_t link;
    dword_t uid;
    access_flags_t access_mask;
} access_control_entry_t;

typedef struct
{
    list_entry_t by_name_list;
    list_entry_t by_type_list;
    char *name;
    qword_t ref_count;
    dword_t open_count;
    object_type_t type;
    uid_t owner;
    lock_t acl_lock;
    list_entry_t acl;
} object_t;

static inline void init_object(object_t *object, const char *name, object_type_t type)
{
    object->name = name ? strdup(name) : NULL;
    object->type = type;
}

dword_t create_object(object_t *object);
void reference(object_t *object);
void dereference(object_t *object);
bool_t reference_by_name(const char *name, object_type_t type, object_t **object);
bool_t reference_by_handle(handle_t handle, object_type_t type, object_t **object);
dword_t open_object(object_t *obj, access_flags_t access_flags, handle_t *handle);
dword_t open_object_by_name(const char *name, object_type_t type, access_flags_t access_flags, handle_t *handle);
void close_object_internal(object_t *obj);
dword_t enum_objects_by_type(object_type_t type, object_t **object);
void object_init(void);

#endif