test_random.c

This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

/***************************************************************************
              random_test.c  -  Shows the randomness of the random-module
                            -------------------
    begin                :  2002
    authors              :  Linus Gasser
    emails               :  [e-mail]
 ***************************************************************************/

/***************************************************************************
                                 Changes
                                 -------
 date - name - description
 02-09-20 - ineiti- begin
 02-10-22 - daniela - test uniformity of random generator
 02-11-04 - ineiti - extended for replacement for msg-qs
 04/03/03 - ineiti - added a small description
 
 **************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program 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 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

char desc[] =
"Description:\n"
"This test is to show the randomness of the random-module. First,\n"
"10000 random-numbers are counted, and 256*the probatility of each\n"
"one is printed. Then, a small sample of 8-bit random numbers are\n"
"outputted.\n\n";

#include "system.h"
#include "cdb.h"
#include "sdb.h"
#include "std.h"
#include "debugging.h"
#include "chain.h"

#define DBG_LVL 4

struct chain_t *test;

void *start_it( void *arg ) {
  swr_sdb_id random, sink;
  int value;

  test = swr_chain_create( NEW_SPC_VAR( "random", random ),
                           NEW_SPC_VAR( "sink", sink ),
			   CHAIN_END );
  // Do something
  value = 123456;
  swr_sdb_set_config_int( sink, "size", 1234567 );
  swr_sdb_set_config_int( sink, "flag", 2 );
  PR( "Sending request to show randomness\n" );
  swr_sdb_send_msg( random, SUBS_MSG_USER, NULL, -1 );

  swr_sdb_set_config_int( sink, "size", 123 );
  swr_sdb_set_config_int( sink, "flag", 3 );
  PR( "Sending a request to display the randoms...\n" );
  swr_sdb_send_msg( random, SUBS_MSG_USER, NULL, -1 );

  PR( "Waiting to finish\n" );
  usleep( 1000000 );

  return 0;
}



struct thread start;
/**
 * This function is called upon "insmod" and is used to register the
 * different parts of the module to the SPM.
 */
int um_module_init(void) {

  PR_CL( desc );
  if ( swr_thread_init( &start, start_it, NULL ) < 0 )
    goto first_no_stack;
  return 0;

first_no_stack:
  PR_DBG( 0, "Couldn't allocate stack\n" );
  return -1;
}

void um_module_exit( void ) {

  swr_thread_free( &start, NULL );
  swr_chain_destroy( test );
}


module_init( um_module_init );
module_exit( um_module_exit );