source: rtems/c/src/tests/tmtests/tm11/task1.c @ 4b374f36

/*
 *
 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
 *  On-Line Applications Research Corporation (OAR).
 *  All rights assigned to U.S. Government, 1994.
 *
 *  This material may be reproduced by or for the U.S. Government pursuant
 *  to the copyright license under the clause at DFARS 252.227-7013.  This
 *  notice must appear in all copies of this file and its derivatives.
 *
 *  task1.c,v 1.2 1995/05/31 17:15:50 joel Exp
 */

#include "system.h"
#undef EXTERN
#define EXTERN
#include "conftbl.h"
#include "gvar.h"

rtems_id Queue_id;

long Buffer[4];

rtems_task test_init(
  rtems_task_argument argument
);

rtems_task Middle_tasks(
  rtems_task_argument argument
);

rtems_task High_task(
  rtems_task_argument argument
);


void Init(
  rtems_task_argument argument
)
{
  rtems_status_code status;
  rtems_id id;

  puts( "\n\n*** TIME TEST 11 ***" );

  status = rtems_task_create(
    1,
    251,
    1024,
    RTEMS_DEFAULT_MODES,
    RTEMS_DEFAULT_ATTRIBUTES,
    &id
  );
  directive_failed( status, "rtems_task_create" );

  status = rtems_task_start( id, test_init, 0 );
  directive_failed( status, "rtems_task_start" );

  status = rtems_task_delete( RTEMS_SELF );
  directive_failed( status, "rtems_task_delete of RTEMS_SELF" );
}

rtems_task test_init(
  rtems_task_argument argument
)
{
  rtems_unsigned32    index;
  rtems_task_entry    task_entry;
  rtems_task_priority priority;
  rtems_id            task_id;
  rtems_status_code   status;

/*  As each task is started, it preempts this task and
 *  performs a blocking rtems_message_queue_receive.  Upon completion of
 *  this loop all created tasks are blocked.
 */

  status = rtems_message_queue_create(
    rtems_build_name( 'M', 'Q', '1', ' '  ),
    OPERATION_COUNT,
    16,
    RTEMS_DEFAULT_ATTRIBUTES,
    &Queue_id
  );
  directive_failed( status, "rtems_message_queue_create" );

  priority = 250;

  for( index = 0; index < OPERATION_COUNT ; index++ ) {
    status = rtems_task_create(
      rtems_build_name( 'T', 'I', 'M', 'E'  ),
      priority,
      1024,
      RTEMS_DEFAULT_MODES,
      RTEMS_DEFAULT_ATTRIBUTES,
      &task_id
    );
    directive_failed( status, "rtems_task_create LOOP" );

    priority--;

    if ( index==OPERATION_COUNT-1 ) task_entry = High_task;
    else                            task_entry = Middle_tasks;

    status = rtems_task_start( task_id, task_entry, 0 );
    directive_failed( status, "rtems_task_start LOOP" );
  }

  Timer_initialize();
    (void) rtems_message_queue_send( Queue_id, (long (*)[4]) Buffer, 16 );
}

rtems_task Middle_tasks(
  rtems_task_argument argument
)
{
  rtems_unsigned32 size;

  (void) rtems_message_queue_receive(
           Queue_id,
           (long (*)[4]) Buffer,
           &size,
           RTEMS_DEFAULT_OPTIONS,
           RTEMS_NO_TIMEOUT
         );

  (void) rtems_message_queue_send( Queue_id, (long (*)[4]) Buffer, size );
}

rtems_task High_task(
  rtems_task_argument argument
)
{
  rtems_unsigned32 size;
  
  (void) rtems_message_queue_receive(
           Queue_id,
           (long (*)[4]) Buffer,
           &size,
           RTEMS_DEFAULT_OPTIONS,
           RTEMS_NO_TIMEOUT
         );

  end_time = Read_timer();

  put_time(
    "rtems_message_queue_send (preemptive)",
    end_time,
    OPERATION_COUNT,
    0,
    CALLING_OVERHEAD_MESSAGE_QUEUE_SEND
  );

  exit( 0 );
}