30 lines
1.2 KiB
C
30 lines
1.2 KiB
C
/*
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* Copyright (c) 2011, 2012, 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* string/explicit_bzero.c
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* Initializes a region of memory to a byte value in a manner that is not
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* optimized away by the compiler.
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*/
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#include <string.h>
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// TODO: Employ special compiler support to ensure this is not optimized away.
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void explicit_bzero(void* dest_ptr, size_t size)
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{
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volatile unsigned char* dest = (volatile unsigned char*) dest_ptr;
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for ( size_t i = 0; i < size; i++ )
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dest[i] = 0;
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}
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