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35 lines
1.4 KiB
C++
35 lines
1.4 KiB
C++
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2014.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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string/explicit_bzero.cpp
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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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extern "C" 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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