xnu-2782.1.97.tar.gz

[apple/xnu.git] / osfmk / prng / YarrowCoreLib / src / yarrowUtils.c

diff --git a/osfmk/prng/YarrowCoreLib/src/yarrowUtils.c b/osfmk/prng/YarrowCoreLib/src/yarrowUtils.c
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+/*
+ * Copyright (c) 1999, 2000-2013 Apple Inc. All rights reserved.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ * 
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ * 
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
+ */
+
+/*
+       File:           yarrowUtils.c
+
+       Contains:       Misc. utility functions.
+
+       Written by:     Doug Mitchell
+
+       Copyright: (c) 2000 by Apple Computer, Inc., all rights reserved.
+
+       Change History (most recent first):
+
+               02/29/00        dpm             Created.
+ 
+*/
+
+#include "prng/YarrowCoreLib/include/yarrowUtils.h"
+#include <string.h>
+
+void 
+trashMemory(void* mem, int len)
+/* This function should only be used on data in RAM */
+{
+       if(len == 0) {
+               /* some memsets really don't like this */
+               return;
+       }
+       
+       /* Cycle a bit just in case it is one of those weird memory units */
+       /* No, I don't know which units those would be */
+       memset(mem,0x00,len);
+       memset(mem,0xFF,len);
+       memset(mem,0x00,len);
+}
+
+