test_second.c

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

/***************************************************************************
              second.c  -  RTLinux kernel module for a second chain!!
                            -------------------
    begin                :  2002
    authors              :  Linus Gasser
    emails               :  [e-mail]
 ***************************************************************************/

/***************************************************************************
                                 Changes
                                 -------
 date - name - description
 02-09-20 - ineiti- begin
 04/03/03 - ineiti - changed for new 'copy'-module and 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"
"The second working chain!!! Historical reasons ;) Just a source,\n"
"a copy-module and two sinks. Should output twice each test-phrase.\n\n";

#include "spc.h"
#include "std.h"

#define DBG_LVL 4

pthread_mutex_t mutex_here;
struct chain_t *second, *third;

void *start_it( void *arg ) {
  swr_spc_id_t source, sink, sink2, copy;
  int str_id;
  char str_str[128];

  PR_DBG( 0, "Getting subsystem cdb-ids\n" );

  second = swr_chain_create( NEW_SPC_VAR( "source", source ),
                             NEW_SPC_VAR( "copy", copy ),
                             NEW_SPC_VAR( "sink", sink ),
			     CHAIN_END );
  third = swr_chain_create( OLD_SPC_OUT( copy, 1 ),
		            NEW_SPC_VAR( "sink", sink2 ),
			    CHAIN_END );

  swr_sdb_set_config_int( sink, "flag", 1 );
  swr_sdb_set_config_int( sink, "size", 128 );
  swr_sdb_set_config_int( sink2, "flag", 1 );
  swr_sdb_set_config_int( sink2, "size", 128 );
  PR_DBG( 0, "Sending request...\n" );
  swr_sdb_send_msg( source, SUBS_MSG_USER, NULL, -1 );

  str_id = swr_sdb_get_config_parameter_nbr( source, "source_str" );
  if ( str_id < 0 ) {
    PR_DBG( 0, "Couldn't get id of str\n" );
  } else {

    usleep( 200000 );
    PR_DBG( 0, "Changing config %i\n", source );
    strncpy( str_str, "Hello world!!!!", 128 );
    if ( swr_sdb_set_config_parameter_value( source, str_id, str_str ) < 0 ) {
      PR_DBG( 0, "Couldn't set the new string\n" );
    }
    swr_sdb_send_msg( source, SUBS_MSG_USER, NULL, -1 );

    usleep( 200000 );
    PR_DBG( 0, "Changing config %i\n", source );
    strncpy( str_str, "Yes, finally it works", 128 );
    if ( swr_sdb_set_config_parameter_value( source, str_id, str_str ) < 0 ) {
      PR_DBG( 0, "Couldn't set the new string\n" );
    }
    swr_sdb_send_msg( source, SUBS_MSG_USER, NULL, -1 );
  }

  usleep( 200000 );

  return 0;
}

swr_spc_id_t cdb_id;
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 second_no_thread;
  }
  return 0;

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

void um_module_exit( void ) {

  swr_thread_free( &start, NULL );
  swr_chain_destroy( third );
  swr_chain_destroy( second );
}


module_init( um_module_init );
module_exit( um_module_exit );