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
64
65
66
67
68
69
70
71
72
73
74
/*
* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The OpenAirInterface Software Alliance licenses this file to You under
* the OAI Public License, Version 1.1 (the "License"); you may not use this file
* except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.openairinterface.org/?page_id=698
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*-------------------------------------------------------------------------------
* For more information about the OpenAirInterface (OAI) Software Alliance:
* contact@openairinterface.org
*/
/*
random.c
-------------------
AUTHOR : Lionel GAUTHIER
COMPANY : EURECOM
EMAIL : Lionel.Gauthier@eurecom.fr
***************************************************************************/
#include "rtos_header.h"
#include "platform_types.h"
#include <sys/time.h>
/* Random generators */
#define FACTOR 16807
#define LASTXN 127773
#define UPTOMOD -2836
static int seed;
void
init_uniform (void)
{
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
}
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;
}