bsd/dev/random/YarrowCoreLib/src/yarrowUtils.c

   1 /*
   2  * Copyright (c) 1999, 2000-2001 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25
  26 /*
  27         File:           yarrowUtils.c
  28
  29         Contains:       Misc. utility functions.
  30
  31         Written by:     Doug Mitchell
  32
  33         Copyright: (c) 2000 by Apple Computer, Inc., all rights reserved.
  34
  35         Change History (most recent first):
  36
  37                 02/29/00        dpm             Created.
  38
  39 */
  40
  41 #include "dev/random/YarrowCoreLib/include/yarrowUtils.h"
  42
  43 void
  44 trashMemory(void* mem, int len)
  45 /* This function should only be used on data in RAM */
  46 {
  47         if(len == 0) {
  48                 /* some memsets really don't like this */
  49                 return;
  50         }
  51
  52         /* Cycle a bit just in case it is one of those weird memory units */
  53         /* No, I don't know which units those would be */
  54         memset(mem,0x00,len);
  55         memset(mem,0xFF,len);
  56         memset(mem,0x00,len);
  57 }
  58
  59