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1 30 unneback 
/*  userext.inl
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 *
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 *  This file contains the macro implementation of the inlined routines
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 *  from the User Extension Handler
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: userext.inl,v 1.2 2001-09-27 11:59:34 chris Exp $
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 */
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#ifndef __USER_EXTENSIONS_inl
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#define __USER_EXTENSIONS_inl
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#include
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/*PAGE
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 *
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 *  _User_extensions_Handler_initialization
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 *
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 *  DESCRIPTION:
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 *
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 *  This routine performs the initialization necessary for this handler.
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 */
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RTEMS_INLINE_ROUTINE void _User_extensions_Handler_initialization (
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    unsigned32              number_of_extensions,
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    User_extensions_Table  *initial_extensions
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)
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{
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  User_extensions_Control *extension;
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  unsigned32               i;
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  _Chain_Initialize_empty( &_User_extensions_List );
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  if ( initial_extensions ) {
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    for (i=0 ; i
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      extension =
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         _Workspace_Allocate_or_fatal_error( sizeof(User_extensions_Control) );
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      extension->Callouts = initial_extensions[i];
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      _Chain_Append( &_User_extensions_List, &extension->Node );
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    }
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  }
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}
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/*PAGE
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 *
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 *  _User_extensions_Add_set
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 *
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 *  DESCRIPTION:
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 *
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 *  This routine is used to add a user extension set to the active list.
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 */
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RTEMS_INLINE_ROUTINE void _User_extensions_Add_set (
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  User_extensions_Control *the_extension,
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  User_extensions_Table   *extension_table
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)
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{
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  the_extension->Callouts = *extension_table;
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  _Chain_Append( &_User_extensions_List, &the_extension->Node );
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}
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/*PAGE
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 *
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 *  _User_extensions_Add_API_set
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 *  DESCRIPTION:
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 *
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 *  This routine is used to add an API extension set to the active list.
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 */
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RTEMS_INLINE_ROUTINE void _User_extensions_Add_API_set (
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  User_extensions_Control *the_extension
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)
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{
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  _Chain_Prepend( &_User_extensions_List, &the_extension->Node );
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}
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/*PAGE
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 *
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 *  _User_extensions_Remove_set
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 *
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 *  DESCRIPTION:
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 *
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 *  This routine is used to remove a user extension set from the active list.
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 */
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RTEMS_INLINE_ROUTINE void _User_extensions_Remove_set (
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  User_extensions_Control  *the_extension
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)
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{
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  _Chain_Extract( &the_extension->Node );
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}
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/*PAGE
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 *
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 *  _User_extensions_Thread_switch
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 *
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 *  DESCRIPTION:
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 *
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 *  This routine is used to invoke the user extension which
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 *  is invoked when a context switch occurs.
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 */
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RTEMS_INLINE_ROUTINE void _User_extensions_Thread_switch (
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  Thread_Control *executing,
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  Thread_Control *heir
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)
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{
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  Chain_Node              *the_node;
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  User_extensions_Control *the_extension;
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  for ( the_node = _User_extensions_List.first ;
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        !_Chain_Is_tail( &_User_extensions_List, the_node ) ;
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        the_node = the_node->next ) {
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    the_extension = (User_extensions_Control *) the_node;
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    if ( the_extension->Callouts.thread_switch != NULL )
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      (*the_extension->Callouts.thread_switch)( executing, heir );
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  }
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}
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#endif
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/* end of include file */

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