usr/src/lib/libc/port/gen/getloadavg.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #pragma weak _getloadavg = getloadavg
  30
  31 #include "lint.h"
  32 #include <sys/types.h>
  33 #include <sys/param.h>
  34 #include <sys/loadavg.h>
  35
  36 /*
  37  * getloadavg -- get the time averaged run queues from the system
  38  */
  39 int
  40 getloadavg(double loadavg[], int nelem)
  41 {
  42         extern int __getloadavg(int *buf, int nelem);
  43
  44         int i, buf[LOADAVG_NSTATS];
  45
  46         if (nelem > LOADAVG_NSTATS)
  47                 nelem = LOADAVG_NSTATS;
  48
  49         if ((nelem = __getloadavg(buf, nelem)) == -1)
  50                 return (-1);
  51
  52         for (i = 0; i < nelem; i++)
  53                 loadavg[i] = (double)buf[i] / FSCALE;
  54
  55         return (nelem);
  56 }