gauthier
c7518ecf42
git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7885 818b1a75-f10b-46b9-bf7c-635c3b92a50f
91 lines
2.3 KiB
C
91 lines
2.3 KiB
C
/*******************************************************************************
|
|
OpenAirInterface
|
|
Copyright(c) 1999 - 2014 Eurecom
|
|
|
|
OpenAirInterface is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
|
|
OpenAirInterface 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with OpenAirInterface.The full GNU General Public License is
|
|
included in this distribution in the file called "COPYING". If not,
|
|
see <http://www.gnu.org/licenses/>.
|
|
|
|
Contact Information
|
|
OpenAirInterface Admin: openair_admin@eurecom.fr
|
|
OpenAirInterface Tech : openair_tech@eurecom.fr
|
|
OpenAirInterface Dev : openair4g-devel@lists.eurecom.fr
|
|
|
|
Address : Eurecom, Campus SophiaTech, 450 Route des Chappes, CS 50193 - 06904 Biot Sophia Antipolis cedex, FRANCE
|
|
|
|
*******************************************************************************/
|
|
|
|
/*
|
|
random.c
|
|
-------------------
|
|
AUTHOR : Lionel GAUTHIER
|
|
COMPANY : EURECOM
|
|
EMAIL : Lionel.Gauthier@eurecom.fr
|
|
***************************************************************************/
|
|
#include "rtos_header.h"
|
|
#include "platform_types.h"
|
|
|
|
#ifdef USER_MODE
|
|
# include <sys/time.h>
|
|
#else
|
|
#include <rtai_sched.h>
|
|
#endif
|
|
|
|
|
|
/* Random generators */
|
|
#define FACTOR 16807
|
|
#define LASTXN 127773
|
|
#define UPTOMOD -2836
|
|
|
|
static int seed;
|
|
|
|
|
|
void
|
|
init_uniform (void)
|
|
{
|
|
#ifdef USER_MODE
|
|
struct timeval tv;
|
|
struct timezone tz;
|
|
|
|
gettimeofday (&tv, &tz);
|
|
seed = (int) tv.tv_usec;
|
|
#ifdef NODE_MT
|
|
#warning TO DO seed = mobileId
|
|
//seed += mobileId;
|
|
#endif
|
|
#ifdef NODE_RG
|
|
#warning TO DO seed = rgId
|
|
//seed += rgId;
|
|
#endif
|
|
#else
|
|
seed = rt_get_time_ns();
|
|
#endif
|
|
}
|
|
|
|
|
|
int
|
|
uniform (void)
|
|
{
|
|
static int times, rest, prod1, prod2;
|
|
|
|
times = seed / LASTXN;
|
|
rest = seed - times * LASTXN;
|
|
prod1 = times * UPTOMOD;
|
|
prod2 = rest * FACTOR;
|
|
seed = prod1 + prod2;
|
|
|
|
return seed;
|
|
}
|