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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [score/] [src/] [threadready.c] - Rev 227
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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: threadready.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_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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