Subversion Repositories openrisc_2011-10-31

/*

 *  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: task.c,v 1.2 2001-09-27 11:59:13 chris Exp $

 */

#include <itron.h>

#include <rtems/score/thread.h>

#include <rtems/score/userext.h>

#include <rtems/score/wkspace.h>

#include <rtems/score/apiext.h>

#include <rtems/score/sysstate.h>

#include <rtems/itron/task.h>

/*

 *  _ITRON_Task_Create_extension

 *

 *  This routine is an extension routine that is invoked as part

 *  of creating any type of task or thread in the system.  If the

 *  task is created via another API, then this routine is invoked

 *  and this API given the opportunity to initialize its extension

 *  area.

 */

boolean _ITRON_Task_Create_extension(

  Thread_Control *executing,

  Thread_Control *created

)

{

  ITRON_API_Control *api;

  api = _Workspace_Allocate( sizeof( ITRON_API_Control ) );

  if ( !api )

    return FALSE;

  created->API_Extensions[ THREAD_API_ITRON ] = api;

  /*

   *  Initialize the ITRON API extension

   */

  return TRUE;

}

/*

 *  _ITRON_Task_Delete_extension

 *

 *  This extension routine is invoked when a task is deleted.

 */

User_extensions_routine _ITRON_Task_Delete_extension(

  Thread_Control *executing,

  Thread_Control *deleted

)

{

  (void) _Workspace_Free( deleted->API_Extensions[ THREAD_API_ITRON ] );

  deleted->API_Extensions[ THREAD_API_ITRON ] = NULL;

}

/*

 *  _ITRON_Task_Initialize_user_tasks

 *

 *  This routine creates and starts all configured user

 *  initialzation threads.

 */

void _ITRON_Task_Initialize_user_tasks( void )

{

  unsigned32                        index;

  unsigned32                        maximum;

  ER                                return_value;

  itron_initialization_tasks_table *user_tasks;

  /*

   *  NOTE:  This is slightly different from the Ada implementation.

   */

  user_tasks = _ITRON_Task_User_initialization_tasks;

  maximum    = _ITRON_Task_Number_of_initialization_tasks;

  if ( !user_tasks || maximum == 0 )

    return;

  for ( index=0 ; index < maximum ; index++ ) {

    return_value = cre_tsk(

       user_tasks[ index ].id,

       &user_tasks[ index ].attributes

    );

    if ( return_value != E_OK )

      _Internal_error_Occurred( INTERNAL_ERROR_ITRON_API, TRUE, return_value );

    return_value = sta_tsk( user_tasks[ index ].id, 0 );

    if ( return_value != E_OK )

      _Internal_error_Occurred( INTERNAL_ERROR_ITRON_API, TRUE, return_value );

  }

}

/*PAGE

 *

 *  _ITRON_Delete_task

 */

ER _ITRON_Delete_task(

  Thread_Control *the_thread

)

{

  Objects_Information     *the_information;

  the_information = _Objects_Get_information( the_thread->Object.id );

  if ( !the_information ) {

    return E_OBJ;             /* XXX - should never happen */

  }

  _Thread_Close( the_information, the_thread );

  _ITRON_Task_Free( the_thread );

  return E_OK;

}

/*

 *  At this point in time, the ITRON API does not need any other

 *  extensions.  See the POSIX and RTEMS API extensions for

 *  examples of how they can be used.

 */

/*

 *  Extension Tables

 */

API_extensions_Control _ITRON_Task_API_extensions = {

  { NULL, NULL },

  NULL,                                     /* predriver */

  _ITRON_Task_Initialize_user_tasks,       /* postdriver */

  NULL                                      /* post switch */

};

User_extensions_Control _ITRON_Task_User_extensions = {

  { NULL, NULL },

  { _ITRON_Task_Create_extension,             /* create */

    NULL,                                     /* start */

    NULL,                                     /* restart */

    _ITRON_Task_Delete_extension,             /* delete */

    NULL,                                     /* switch */

    NULL,                                     /* begin */

    NULL,                                     /* exitted */

    NULL                                      /* fatal */

  }

};

/*

 *  _ITRON_Task_Manager_initialization

 *

 *  This routine initializes all Task Manager related data structures.

 *

 *  Input parameters:

 *    maximum_tasks       - number of tasks to initialize

 *

 *  Output parameters:  NONE

 */

void _ITRON_Task_Manager_initialization(

  unsigned32                        maximum_tasks,

  unsigned32                        number_of_initialization_tasks,

  itron_initialization_tasks_table *user_tasks

)

{

  _ITRON_Task_Number_of_initialization_tasks = number_of_initialization_tasks;

  _ITRON_Task_User_initialization_tasks = user_tasks;

  /*

   *  There may not be any ITRON_initialization tasks configured.

   */

#if 0

  if ( user_tasks == NULL || number_of_initialization_tasks == 0 )

    _Internal_error_Occurred( INTERNAL_ERROR_ITRON_API, TRUE, -1 );

#endif

  _Objects_Initialize_information(

    &_ITRON_Task_Information,   /* object information table */

    OBJECTS_ITRON_TASKS,        /* object class */

    FALSE,                      /* TRUE if this is a global object class */

    maximum_tasks,              /* maximum objects of this class */

    sizeof( Thread_Control ),   /* size of this object's control block */

    FALSE,                      /* TRUE if names for this object are strings */

    ITRON_MAXIMUM_NAME_LENGTH,  /* maximum length of each object's name */

    TRUE                        /* TRUE if this class is threads */

  );

  /*

   *  Add all the extensions for this API

   */

  _User_extensions_Add_API_set( &_ITRON_Task_User_extensions );

  _API_extensions_Add( &_ITRON_Task_API_extensions );

  /*

   *  XXX MP not supported

   *  Register the MP Process Packet routine.

   */

}