434f76bcb7
When arc4random() is available, rk_random_init() does not have to call arc4random_stir(). ac4random_stir() will be called as a result of the first call to arc4random(). Change-Id: I6f4a3be7c39752746657945ed15896472908f889
101 lines
3.1 KiB
C
101 lines
3.1 KiB
C
/*
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* Copyright (c) 1997 - 2002 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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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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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <config.h>
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#include "roken.h"
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#ifdef HAVE_WIN32_RAND_S
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static int hasRand_s = 1;
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// The Following is BackPorted from VersionHelpers.h in the 10.0.15063.0 SDK
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static FORCEINLINE BOOL
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IsWindowsVersionOrGreater(WORD wMajorVersion, WORD wMinorVersion, WORD wServicePackMajor)
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{
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OSVERSIONINFOEXW osvi ={ sizeof(osvi), 0, 0, 0, 0,{ 0 }, 0, 0 };
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DWORDLONG const dwlConditionMask = VerSetConditionMask(
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VerSetConditionMask(
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VerSetConditionMask(
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0, VER_MAJORVERSION, VER_GREATER_EQUAL),
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VER_MINORVERSION, VER_GREATER_EQUAL),
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VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
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osvi.dwMajorVersion = wMajorVersion;
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osvi.dwMinorVersion = wMinorVersion;
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osvi.wServicePackMajor = wServicePackMajor;
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return VerifyVersionInfoW(&osvi, VER_MAJORVERSION | VER_MINORVERSION | VER_SERVICEPACKMAJOR, dwlConditionMask) != FALSE;
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}
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static FORCEINLINE BOOL
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IsWindowsXPOrGreater()
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{
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// Assume that _WIN32_WINNT_WINXP (0x0501) not available so use contants.
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return IsWindowsVersionOrGreater(5, 1, 0);
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}
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#endif
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void ROKEN_LIB_FUNCTION
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rk_random_init(void)
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{
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#if defined(HAVE_ARC4RANDOM)
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/* nothing to do */;
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#elif defined(HAVE_SRANDOMDEV)
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srandomdev();
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#elif defined(HAVE_RANDOM)
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srandom(time(NULL));
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#else
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# ifdef HAVE_WIN32_RAND_S
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hasRand_s = IsWindowsXPOrGreater();
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# endif
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srand (time(NULL));
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#endif
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}
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#ifdef HAVE_WIN32_RAND_S
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unsigned int ROKEN_LIB_FUNCTION
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rk_random(void)
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{
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if (hasRand_s) {
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unsigned int n;
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int code;
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code = rand_s(&n);
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if (code == 0)
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return n;
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}
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return rand();
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}
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#endif
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