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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [src/] [threadclearstate.c] - Rev 30
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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: threadclearstate.c,v 1.2 2001-09-27 11:59:34 chris Exp $ */ #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_Clear_state * * This kernel routine clears the appropriate states in the * requested thread. The thread ready chain is adjusted if * necessary and the Heir thread is set accordingly. * * Input parameters: * the_thread - pointer to thread control block * state - state set to clear * * Output parameters: NONE * * INTERRUPT LATENCY: * priority map * select heir */ void _Thread_Clear_state( Thread_Control *the_thread, States_Control state ) { ISR_Level level; States_Control current_state; _ISR_Disable( level ); current_state = the_thread->current_state; if ( current_state & state ) { current_state = the_thread->current_state = _States_Clear( state, current_state ); if ( _States_Is_ready( current_state ) ) { _Priority_Add_to_bit_map( &the_thread->Priority_map ); _Chain_Append_unprotected(the_thread->ready, &the_thread->Object.Node); _ISR_Flash( level ); if ( the_thread->current_priority < _Thread_Heir->current_priority ) { _Thread_Heir = the_thread; if ( _Thread_Executing->is_preemptible || the_thread->current_priority == 0 ) _Context_Switch_necessary = TRUE; } } } _ISR_Enable( level ); }
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