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/*
* Thread Handler
*
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/apiext.h>
#include <rtems/score/context.h>
#include <rtems/score/interr.h>
#include <rtems/score/isr.h>
#include <rtems/score/object.h>
#include <rtems/score/priority.h>
#include <rtems/score/states.h>
#include <rtems/score/sysstate.h>
#include <rtems/score/thread.h>
#include <rtems/score/threadq.h>
#include <rtems/score/userext.h>
#include <rtems/score/wkspace.h>
/*PAGE
*
* _Thread_Ready
*
* This kernel routine readies the requested thread, the thread chain
* is adjusted. A new heir thread may be selected.
*
* Input parameters:
* the_thread - pointer to thread control block
*
* Output parameters: NONE
*
* NOTE: This routine uses the "blocking" heir selection mechanism.
* This insures the correct heir after a thread restart.
*
* INTERRUPT LATENCY:
* ready chain
* select heir
*/
void _Thread_Ready(
Thread_Control *the_thread
)
{
ISR_Level level;
Thread_Control *heir;
_ISR_Disable( level );
the_thread->current_state = STATES_READY;
_Priority_Add_to_bit_map( &the_thread->Priority_map );
_Chain_Append_unprotected( the_thread->ready, &the_thread->Object.Node );
_ISR_Flash( level );
_Thread_Calculate_heir();
heir = _Thread_Heir;
if ( !_Thread_Is_executing( heir ) && _Thread_Executing->is_preemptible )
_Context_Switch_necessary = TRUE;
_ISR_Enable( level );
}
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