libBLOC

/*
 * Copyright (C) 2023 Barry
 *
 * This file is part of Barry's Little Objects in C Library (libBLOC).
 *
 * libBLOC 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.
 *
 * libBLOC is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTIBILITY 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
 * libBLOC.  If not, see <https://www.gnu.org/licenses/>.
 */

#ifndef OBJECT_H
#define OBJECT_H

typedef _Atomic int spinlock_t;

/* Structure for an object header */
struct ObjectHeader {
	unsigned int magic;
	struct ObjectType *type;
	refcount_t usage;

	spinlock_t lock;
	unsigned int owner;
	refcount_t locks;
};
#define OBJECT_MAGIC 0x01020304

/* Get a pointer to an object's header */
static struct ObjectHeader *
object_header(void *addr)
{
	return (addr - sizeof(struct ObjectHeader));
}

#endif