8485250989
Add an implementation of memset_s to roken. Some optimising compilers may remove the memset() instruction when it is used immediately before a free, which defeats its purpose if the intention is to zero memory before returning it to the heap or stack. C11 added memset_s, provide a fallback in roken so that memset_s can be used on all platforms.
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/***********************************************************************
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* Copyright (c) 2015, Your File System Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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**********************************************************************/
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#include <config.h>
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#include "roken.h"
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int ROKEN_LIB_FUNCTION
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memset_s(void *s, size_t smax, int c, size_t n)
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{
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volatile unsigned char *p = s;
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#ifdef _WIN32
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if (c == 0) {
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SecureZeroMemory(s, n);
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return 0;
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}
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#endif
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while (n--)
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*p++ = c;
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return 0;
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}
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