usr/src/lib/libbc/libc/gen/common/madvise.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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1988 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 #include <sys/types.h>
  30 #include <sys/mman.h>
  31 #include <errno.h>
  32
  33 /*
  34  * Function to provide advise to vm system to optimize it's
  35  *   characteristics for a particular application
  36  */
  37
  38 /*LINTLIBRARY*/
  39 int
  40 madvise(caddr_t addr, u_int len, int advice)
  41 {
  42         if (len == 0) {
  43                 errno = EINVAL;
  44                 return (-1);
  45         }
  46         return (mctl(addr, len, MC_ADVISE, advice));
  47 }
  48
  49 /*
  50  * This is only here so programs that use vadvise will not fail
  51  * because it is not in the bcp libc.
  52  */
  53 int
  54 vadvise(int param)
  55 {
  56         return (0);
  57 }