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/*
* 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 1986 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "mallint.h"
#include <errno.h>
/*
* mallopt -- System V-compatible malloc "optimizer"
*/
int
mallopt(int cmd, int value)
{
if (__mallinfo.smblks != 0)
return (-1); /* small block has been allocated */
switch (cmd) {
case M_MXFAST: /* small block size */
if (value < 0)
return (-1);
__mallinfo.mxfast = value;
break;
case M_NLBLKS: /* # small blocks per holding block */
if (value <= 0)
return (-1);
__mallinfo.nlblks = value;
break;
case M_GRAIN: /* small block rounding factor */
if (value <= 0)
return (-1);
/* round up to multiple of minimum alignment */
__mallinfo.grain = roundup(value, ALIGNSIZ);
break;
case M_KEEP: /* Sun algorithm always preserves data */
break;
default:
return (-1);
}
/* make sure that everything is consistent */
__mallinfo.mxfast = roundup(__mallinfo.mxfast, __mallinfo.grain);
return (0);
}
/*
* mallinfo -- System V-compatible malloc information reporter
*/
struct mallinfo
mallinfo(void)
{
struct mallinfo mi;
mi = __mallinfo;
mi.uordblks = mi.uordbytes - (mi.allocated * sizeof(uint));
mi.fordblks = mi.arena - (mi.treeoverhead + mi.uordblks +
(mi.ordblks * sizeof(uint)));
return (mi);
}
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