xref: /titanic_50/usr/src/lib/libbc/inc/include/malloc.h (revision 7c478bd95313f5f23a4c958a745db2134aa03244)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984 AT&T */
/*        All Rights Reserved   */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#ifndef	__malloc_h
#define	__malloc_h

/*
 *	Constants defining mallopt operations
 */
#define	M_MXFAST	1	/* set size of 'small blocks' */
#define	M_NLBLKS	2	/* set num of small blocks in holding block */
#define	M_GRAIN		3	/* set rounding factor for small blocks */
#define	M_KEEP		4	/* (nop) retain contents of freed blocks */

/*
 *	malloc information structure
 */
struct	mallinfo  {
	int arena;	/* total space in arena */
	int ordblks;	/* number of ordinary blocks */
	int smblks;	/* number of small blocks */
	int hblks;	/* number of holding blocks */
	int hblkhd;	/* space in holding block headers */
	int usmblks;	/* space in small blocks in use */
	int fsmblks;	/* space in free small blocks */
	int uordblks;	/* space in ordinary blocks in use */
	int fordblks;	/* space in free ordinary blocks */
	int keepcost;	/* cost of enabling keep option */

	int mxfast;	/* max size of small blocks */
	int nlblks;	/* number of small blocks in a holding block */
	int grain;	/* small block rounding factor */
	int uordbytes;	/* space (including overhead) allocated in ord. blks */
	int allocated;	/* number of ordinary blocks allocated */
	int treeoverhead;	/* bytes used in maintaining the free tree */
};

typedef	char *	malloc_t;

extern	malloc_t	calloc(/* size_t nmemb, size_t size */);
extern	int		free(/* malloc_t ptr */);
extern	malloc_t	malloc(/* size_t size */);
extern	malloc_t	realloc(/* malloc_t ptr, size_t size */);
extern	int		mallopt();
extern	struct mallinfo mallinfo();

#endif	/* !__malloc_h */