/usr/include/urcu/rand-compat.h is in liburcu-dev 0.9.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | #ifndef _URCU_RAND_COMPAT_H
#define _URCU_RAND_COMPAT_H
/*
* urcu/rand-compat.h
*
* Userspace RCU library - rand/rand_r Compatibility Header
*
* Copyright 1996 - Ulrich Drepper <drepper@cygnus.com >
* Copyright 2013 - Pierre-Luc St-Charles <pierre-luc.st-charles@polymtl.ca>
*
* Note: this file is only used to simplify the code required to
* use the 'rand_r(...)' system function across multiple platforms,
* which might not always be referenced the same way.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef __ANDROID__
/*
* Reentrant random function from POSIX.1c.
* Copyright (C) 1996, 1999 Free Software Foundation, Inc.
* This file is part of the GNU C Library.
* Contributed by Ulrich Drepper <drepper@cygnus.com <mailto:drepper@cygnus.com>>, 1996.
*/
static inline int rand_r(unsigned int *seed)
{
unsigned int next = *seed;
int result;
next *= 1103515245;
next += 12345;
result = (unsigned int) (next / 65536) % 2048;
next *= 1103515245;
next += 12345;
result <<= 10;
result ^= (unsigned int) (next / 65536) % 1024;
next *= 1103515245;
next += 12345;
result <<= 10;
result ^= (unsigned int) (next / 65536) % 1024;
*seed = next;
return result;
}
#endif /* __ANDROID__ */
#endif /* _URCU_RAND_COMPAT_H */
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