C++ (Cpp) Get_Longest_Name Examples

Example #1

void *POSIX_Init(
  void *argument
)
{
  struct mq_attr         attr;
  mqd_t                  mq;

  puts( "\n\n*** POSIX MESSAGE QUEUE 02 TEST ***" );


  /* set the time of day, and print our buffer in multiple ways */

  set_time( TM_FRIDAY, TM_MAY, 24, 96, 11, 5, 0 );

  /* get id of this thread */

  Init_id = pthread_self();
  printf( "Init's ID is 0x%08" PRIxpthread_t "\n", Init_id );

  Allocate_majority_of_workspace(NAME_MAX);

  attr.mq_maxmsg  = MAXMSG;
  attr.mq_msgsize = MSGSIZE;
  puts("Init: mq_open - Workspace not available - ENOMEM");
  mq = mq_open( Get_Longest_Name(), O_CREAT, 0x777, &attr );
  fatal_posix_service_status_errno(mq, ENOMEM, "no workspace available");

  puts( "*** END OF POSIX MESSAGE QUEUE 02 TEST ***" );
  rtems_test_exit( 0 );

  return NULL; /* just so the compiler thinks we returned something */
}

Example #2

void *POSIX_Init(
  void *argument
)
{
  struct mq_attr          attr;
  mqd_t                   Queue, second_Queue;
  int                     sc;
  Heap_Information_block  start;
  Heap_Information_block  info;
  size_t                  to_alloc;
  void                   *alloced;
  bool                    sb;
  const char             *name;

  puts( "\n\n*** POSIX MESSAGE QUEUE TEST 4 ***" );

  attr.mq_maxmsg = 1;
  attr.mq_msgsize = sizeof(int);

  puts( "Init - Open message queue instance 1" );
  Queue = mq_open( "Queue", O_CREAT | O_RDWR, 0x777, &attr );
  if ( Queue == (-1) )
    perror( "mq_open failed" );
  rtems_test_assert( Queue != (-1) );

  puts( "Init - Open message queue instance 2 - FAIL - ENFILE " );
  second_Queue = mq_open( "Queue2", O_CREAT | O_RDWR, 0x777, &attr );
  if ( second_Queue != (-1) )
    puts( "mq_open did not failed" );
  rtems_test_assert( second_Queue == (-1) );
  rtems_test_assert( errno == ENFILE );

  puts( "Init - Unlink message queue instance 1" );
  sc = mq_unlink( "Queue" );
  if ( sc != 0 )
    perror( "mq_unlink failed" );
  rtems_test_assert( sc == 0 );

  puts( "Init - Close message queue instance 1" );
  sc = mq_close( Queue );
  if ( sc != 0 )
    perror( "mq_close failed" );
  rtems_test_assert( sc == 0 );

  sb = rtems_workspace_get_information( &start );
  rtems_test_assert( start.Free.number == 1 );
  to_alloc = start.Free.largest;

  /* find the largest we can actually allocate */
  while ( 1 ) {
    sb = rtems_workspace_allocate( to_alloc, &alloced );
    if ( sb )
      break;
    to_alloc -= 4;
  }

  rtems_workspace_free( alloced );

  /*
   * Now do the test
   */
  puts( "Init - Memory allocation error test" );

  sb = rtems_workspace_get_information( &info );

  attr.mq_maxmsg = 1;
  attr.mq_msgsize = 200;

  name = Get_Longest_Name();
  while ( attr.mq_msgsize > 0 ) {
    sb = rtems_workspace_allocate( to_alloc, &alloced );
    rtems_test_assert( sb );

    second_Queue = mq_open(name,O_CREAT | O_RDWR, 0x777, &attr );

    /* free the memory we snagged, then check the status */
    rtems_workspace_free( alloced );

    if ( second_Queue != (-1) )
      break;

    /* attr.mq_msgsize -= 48; */
    to_alloc -= 4;
  }

  if ( second_Queue == -1 )
    rtems_test_exit(0);

  puts( "Init - Message Queue created" );

  puts( "Init - Unlink message queue" );
    sc = mq_unlink( name );
    if ( sc != 0 )
      perror( "mq_unlink failed" );
    rtems_test_assert( sc == 0 );

  puts( "Init - Close message queue" );
    sc = mq_close( second_Queue );
    if ( sc != 0 )
      perror( "mq_close failed" );
    rtems_test_assert( sc == 0 );

  puts( "*** END OF POSIX MESSAGE QUEUE TEST 4 ***" );
  rtems_test_exit( 0 );

  return NULL; /* just so the compiler thinks we returned something */
}