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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.OARcorp.com/rtems/license.html.
*
* $Id$
*/
#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_Set_transient
*
* This kernel routine places the requested thread in the transient state
* which will remove it from the ready queue, if necessary. No
* rescheduling is necessary because it is assumed that the transient
* state will be cleared before dispatching is enabled.
*
* Input parameters:
* the_thread - pointer to thread control block
*
* Output parameters: NONE
*
* INTERRUPT LATENCY:
* only case
*/
void _Thread_Set_transient(
Thread_Control *the_thread
)
{
ISR_Level level;
unsigned32 old_state;
Chain_Control *ready;
ready = the_thread->ready;
_ISR_Disable( level );
old_state = the_thread->current_state;
the_thread->current_state = _States_Set( STATES_TRANSIENT, old_state );
if ( _States_Is_ready( old_state ) ) {
if ( _Chain_Has_only_one_node( ready ) ) {
_Chain_Initialize_empty( ready );
_Priority_Remove_from_bit_map( &the_thread->Priority_map );
} else
_Chain_Extract_unprotected( &the_thread->Object.Node );
}
_ISR_Enable( level );
}
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