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70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/**
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* (C) 2007-21 - ntop.org and contributors
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not see see <http://www.gnu.org/licenses/>
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*
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*/
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#ifndef RND_H
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#define RND_H
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#include <stdint.h>
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#include <stddef.h>
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#include <time.h> /* time, clock */
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#include "n2n.h" /* traceEvent */
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// syscall and inquiring random number from hardware generators might fail, so we will retry
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#define RND_RETRIES 1000
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#if defined (__linux__)
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#include <sys/syscall.h> /* syscall, SYS_getrandom */
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#ifdef SYS_getrandom
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#define GRND_NONBLOCK 1
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#include <errno.h> /* errno, EAGAIN */
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#endif
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#endif
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#if defined (__RDRND__) || defined (__RDSEED__)
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#include <immintrin.h> /* _rdrand64_step, rdseed4_step */
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#endif
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#if defined (WIN32)
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#include <Wincrypt.h> // HCTYPTPROV, Crypt*-functions
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#endif
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typedef struct rn_generator_state_t {
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uint64_t a, b;
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} rn_generator_state_t;
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typedef struct splitmix64_state_t {
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uint64_t s;
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} splitmix64_state_t;
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int n2n_srand (uint64_t seed);
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uint64_t n2n_rand (void);
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uint64_t n2n_seed (void);
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uint32_t n2n_rand_sqr (uint32_t max_n);
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#endif // RND_H
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