75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/*
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* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The OpenAirInterface Software Alliance licenses this file to You under
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* the OAI Public License, Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.openairinterface.org/?page_id=698
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*-------------------------------------------------------------------------------
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* For more information about the OpenAirInterface (OAI) Software Alliance:
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* contact@openairinterface.org
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*/
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/*
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random.c
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-------------------
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AUTHOR : Lionel GAUTHIER
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COMPANY : EURECOM
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EMAIL : Lionel.Gauthier@eurecom.fr
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***************************************************************************/
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#include "rtos_header.h"
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#include "platform_types.h"
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#include <sys/time.h>
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/* Random generators */
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#define FACTOR 16807
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#define LASTXN 127773
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#define UPTOMOD -2836
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static int seed;
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void
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init_uniform (void)
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{
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struct timeval tv;
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struct timezone tz;
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gettimeofday (&tv, &tz);
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seed = (int) tv.tv_usec;
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#ifdef NODE_MT
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#warning TO DO seed = mobileId
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//seed += mobileId;
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#endif
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#ifdef NODE_RG
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#warning TO DO seed = rgId
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//seed += rgId;
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#endif
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}
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int
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uniform (void)
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{
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static int times, rest, prod1, prod2;
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times = seed / LASTXN;
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rest = seed - times * LASTXN;
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prod1 = times * UPTOMOD;
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prod2 = rest * FACTOR;
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seed = prod1 + prod2;
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return seed;
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}
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