path: root/cpukit/sapi/src/extensioncreate.c

/**
 * @file
 *
 * @ingroup RTEMSImplClassicUserExt
 *
 * @brief This source file contains the implementation of
 *   rtems_extension_create() and the User Extensions Manager system
 *   initialization.
 */

/*
 *  COPYRIGHT (c) 1989-2007.
 *  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.rtems.org/license/LICENSE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/extensionimpl.h>
#include <rtems/rtems/support.h>
#include <rtems/score/userextimpl.h>
#include <rtems/sysinit.h>

rtems_status_code rtems_extension_create(
  rtems_name                    name,
  const rtems_extensions_table *extension_table,
  rtems_id                     *id
)
{
  Extension_Control *the_extension;

  if ( !rtems_is_name_valid( name ) ) {
    return RTEMS_INVALID_NAME;
  }

  if ( extension_table == NULL ) {
    return RTEMS_INVALID_ADDRESS;
  }

  if ( id == NULL ) {
    return RTEMS_INVALID_ADDRESS;
  }

  the_extension = _Extension_Allocate();

  if ( the_extension == NULL ) {
    _Objects_Allocator_unlock();
    return RTEMS_TOO_MANY;
  }

  _User_extensions_Add_set_with_table( &the_extension->Extension, extension_table );

  *id = _Objects_Open_u32(
    &_Extension_Information,
    &the_extension->Object,
    name
  );
  _Objects_Allocator_unlock();
  return RTEMS_SUCCESSFUL;
}

static void _Extension_Manager_initialization( void )
{
  _Objects_Initialize_information( &_Extension_Information);
}

RTEMS_SYSINIT_ITEM(
  _Extension_Manager_initialization,
  RTEMS_SYSINIT_USER_EXTENSIONS,
  RTEMS_SYSINIT_ORDER_MIDDLE
);