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/**
* @file
*
* @ingroup RTEMSScoreUserExt
*
* @brief User Extension Handler implementation.
*/
/*
* 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/score/userextimpl.h>
#include <rtems/score/smp.h>
#include <rtems/score/percpu.h>
static void _User_extensions_Set_ancestors( void )
{
#if defined(RTEMS_SMP)
if ( _Chain_Is_empty( &_User_extensions_Switches_list ) ) {
uint32_t cpu_max;
uint32_t cpu_index;
cpu_max = _SMP_Get_processor_maximum();
for ( cpu_index = 0 ; cpu_index < cpu_max ; ++cpu_index ) {
Per_CPU_Control *cpu;
cpu = _Per_CPU_Get_by_index( cpu_index );
cpu->ancestor = cpu->executing;
}
}
#endif
}
void _User_extensions_Add_set(
User_extensions_Control *the_extension
)
{
ISR_lock_Context lock_context;
_User_extensions_Acquire( &lock_context );
_Chain_Initialize_node( &the_extension->Node );
_Chain_Append_unprotected(
&_User_extensions_List.Active,
&the_extension->Node
);
_User_extensions_Release( &lock_context );
/*
* 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;
_Per_CPU_Acquire_all( &lock_context );
_User_extensions_Set_ancestors();
_Chain_Initialize_node( &the_extension->Switch.Node );
_Chain_Append_unprotected(
&_User_extensions_Switches_list,
&the_extension->Switch.Node
);
_Per_CPU_Release_all( &lock_context );
}
}
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