Subversion Repositories openrisc_2011-10-31

/*  Priority_task

 *

 *  This routine serves as a test task.  It verifies the semaphore manager.

 *

 *  Input parameters:

 *    its_index - priority index

 *

 *  Output parameters:  NONE

 *

 *  COPYRIGHT (c) 1989-1999.

 *  On-Line Applications Research Corporation (OAR).

 *

 *  The license and distribution terms for this file may be

 *  found in the file LICENSE in this distribution or at

 *  http://www.OARcorp.com/rtems/license.html.

 *

 *  $Id: pritask.c,v 1.2 2001-09-27 12:02:32 chris Exp $

 */

#include "system.h"

rtems_task Priority_task(

  rtems_task_argument its_index

)

{

  rtems_interval      timeout;

  rtems_task_priority its_priority;

  rtems_task_priority current_priority;

  rtems_status_code   status;

  rtems_unsigned32    index;

  its_priority = Task_priority[ its_index ];

  if ( its_priority < 3 )

    timeout = 5 * TICKS_PER_SECOND;

  else

    timeout = RTEMS_NO_TIMEOUT;

  put_name( Priority_task_name[ its_index ], FALSE );

  puts( " - rtems_semaphore_obtain - wait forever on SM2" );

  status = rtems_semaphore_obtain(

    Semaphore_id[ 2 ],

    RTEMS_DEFAULT_OPTIONS,

    timeout

  );

  directive_failed( status, "rtems_semaphore_obtain of SM2" );

  if ( its_priority < 64 ) {

    printf( "PRI%d - WHY AM I HERE? (pri=%d)", its_index, its_priority );

    exit( 0 );

  }

  if ( its_index == 5 )

    puts( "PRI5 - rtems_task_suspend - until all priority tasks blocked" );

  status = rtems_task_suspend( RTEMS_SELF );

  directive_failed( status, "rtems_task_suspend" );

  puts( "PRI5 - rtems_task_delete - all tasks waiting on SM2" );

  for ( index = 1 ; index < 5 ; index++ ) {

    status = rtems_task_delete( Priority_task_id[ index ] );

    directive_failed( status, "rtems_task_delete loop" );

  }

  puts( "PRI5 - rtems_semaphore_obtain - nested" );

  status = rtems_semaphore_obtain(

    Semaphore_id[ 2 ],

    RTEMS_DEFAULT_OPTIONS,

    timeout

  );

  directive_failed( status, "rtems_semaphore_obtain nested" );

  puts( "PRI5 - rtems_semaphore_release - nested" );

  status = rtems_semaphore_release( Semaphore_id[ 2 ] );

  directive_failed( status, "rtems_semaphore_release nested " );

  puts( "PRI5 - rtems_semaphore_release - restore priority" );

  status = rtems_semaphore_release( Semaphore_id[ 2 ] );

  directive_failed( status, "rtems_semaphore_release" );

  status = rtems_task_set_priority(

    RTEMS_SELF,

    RTEMS_CURRENT_PRIORITY,

    &current_priority

  );

  directive_failed( status, "PRI5 rtems_task_set_priority CURRENT" );

  printf( "PRI5 - priority of PRI5 is %d\n", current_priority );

  (void) rtems_task_suspend( RTEMS_SELF );

}