gauthier
c7518ecf42
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7885 818b1a75-f10b-46b9-bf7c-635c3b92a50f
112 lines
2.8 KiB
C
112 lines
2.8 KiB
C
/*******************************************************************************
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OpenAirInterface
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Copyright(c) 1999 - 2014 Eurecom
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OpenAirInterface 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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OpenAirInterface 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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You should have received a copy of the GNU General Public License
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along with OpenAirInterface.The full GNU General Public License is
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included in this distribution in the file called "COPYING". If not,
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see <http://www.gnu.org/licenses/>.
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Contact Information
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OpenAirInterface Admin: openair_admin@eurecom.fr
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OpenAirInterface Tech : openair_tech@eurecom.fr
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OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
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Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
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*******************************************************************************/
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#ifdef USER_MODE
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#include <time.h>
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#include <stdlib.h>
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#else
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#include <asm/io.h>
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#include <asm/rtai.h>
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#endif
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#ifdef RTAI_ENABLED
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#include <rtai.h>
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#include <rtai_sched.h>
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#define time(x) (unsigned int)(rt_get_time_ns())
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#endif
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unsigned int s0, s1, s2, b;
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//----------------------------------------------
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//
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/*!
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*/
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//
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unsigned int taus(void)
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{
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b = (((s0 << 13) ^ s0) >> 19);
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s0 = (((s0 & 0xFFFFFFFE) << 12)^ b);
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b = (((s1 << 2) ^ s1) >> 25);
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s1 = (((s1 & 0xFFFFFFF8) << 4)^ b);
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b = (((s2 << 3) ^ s2) >> 11);
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s2 = (((s2 & 0xFFFFFFF0) << 17)^ b);
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return s0 ^ s1 ^ s2;
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}
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void set_taus_seed(unsigned int seed_init)
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{
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#ifdef USER_MODE
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struct drand48_data buffer;
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unsigned long result = 0;
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#endif
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if (seed_init == 0) {
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s0 = (unsigned int)time(NULL);
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s1 = (unsigned int)time(NULL);
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s2 = (unsigned int)time(NULL);
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} else {
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#ifndef USER_MODE
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s0 = (unsigned int)0x1e23d852;
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s1 = (unsigned int)0x81f38a1c;
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s2 = (unsigned int)0xfe1a133e;
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#else
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/* Use reentrant version of rand48 to ensure that no conflicts with other generators occur */
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srand48_r((long int)seed_init, &buffer);
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mrand48_r(&buffer, (long int *)&result);
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s0 = result;
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mrand48_r(&buffer, (long int *)&result);
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s1 = result;
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mrand48_r(&buffer, (long int *)&result);
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s2 = result;
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#endif
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}
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}
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#ifdef MAIN
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main()
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{
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unsigned int i,rand;
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set_taus_seed();
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for (i=0; i<10; i++) {
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rand = taus();
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printf("%u\n",rand);
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}
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}
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#endif //MAIN
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