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/**
* @file rtems/score/userext.inl
*
* This file contains the macro implementation of the inlined routines
* from the User Extension Handler
*/
/*
* COPYRIGHT (c) 1989-2004.
* 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.com/license/LICENSE.
*
* $Id$
*/
#ifndef __USER_EXTENSIONS_inl
#define __USER_EXTENSIONS_inl
#include <rtems/score/wkspace.h>
/**
* @addtogroup ScoreUserExt
* @{
*/
/**
* This routine is used to add a user extension set to the active list.
*
* @note Must be before _User_extensions_Handler_initialization to
* ensure proper inlining.
*/
RTEMS_INLINE_ROUTINE void _User_extensions_Add_set (
User_extensions_Control *the_extension,
User_extensions_Table *extension_table
)
{
the_extension->Callouts = *extension_table;
_Chain_Append( &_User_extensions_List, &the_extension->Node );
/*
* If a switch handler is present, append it to the switch chain.
*/
if ( extension_table->thread_switch != NULL ) {
the_extension->Switch.thread_switch = extension_table->thread_switch;
_Chain_Append( &_User_extensions_Switches_list, &the_extension->Switch.Node );
}
}
/**
* This routine performs the initialization necessary for this handler.
*/
RTEMS_INLINE_ROUTINE void _User_extensions_Handler_initialization (
uint32_t number_of_extensions,
User_extensions_Table *initial_extensions
)
{
User_extensions_Control *extension;
uint32_t i;
_Chain_Initialize_empty( &_User_extensions_List );
_Chain_Initialize_empty( &_User_extensions_Switches_list );
if ( initial_extensions ) {
extension = (User_extensions_Control *)
_Workspace_Allocate_or_fatal_error(
number_of_extensions * sizeof( User_extensions_Control )
);
memset (
extension,
0,
number_of_extensions * sizeof( User_extensions_Control )
);
for ( i = 0 ; i < number_of_extensions ; i++ ) {
_User_extensions_Add_set (extension, &initial_extensions[i]);
extension++;
}
}
}
/**
* This routine is used to add an API extension set to the active list.
*/
RTEMS_INLINE_ROUTINE void _User_extensions_Add_API_set (
User_extensions_Control *the_extension
)
{
_Chain_Append( &_User_extensions_List, &the_extension->Node );
/*
* If a switch handler is present, append it to the switch chain.
*/
if ( the_extension->Callouts.thread_switch != NULL ) {
the_extension->Switch.thread_switch = the_extension->Callouts.thread_switch;
_Chain_Append(
&_User_extensions_Switches_list, &the_extension->Switch.Node );
}
}
/**
* This routine is used to remove a user extension set from the active list.
*/
RTEMS_INLINE_ROUTINE void _User_extensions_Remove_set (
User_extensions_Control *the_extension
)
{
_Chain_Extract( &the_extension->Node );
/*
* If a switch handler is present, remove it.
*/
if ( the_extension->Callouts.thread_switch != NULL )
_Chain_Extract( &the_extension->Switch.Node );
}
/**
* This routine is used to invoke the user extension which
* is invoked when a context switch occurs.
*/
RTEMS_INLINE_ROUTINE void _User_extensions_Thread_switch (
Thread_Control *executing,
Thread_Control *heir
)
{
Chain_Node *the_node;
User_extensions_Switch_control *the_extension_switch;
for ( the_node = _User_extensions_Switches_list.first ;
!_Chain_Is_tail( &_User_extensions_Switches_list, the_node ) ;
the_node = the_node->next ) {
the_extension_switch = (User_extensions_Switch_control *) the_node;
(*the_extension_switch->thread_switch)( executing, heir );
}
}
/**@}*/
#endif
/* end of include file */
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