score/src/threadclearstate.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSScoreThread
0007  *
0008  * @brief This source file contains the implementation of
0009  *   _Thread_Clear_state_locked() and _Thread_Clear_state().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-2011.
0014  *  On-Line Applications Research Corporation (OAR).
0015  *
0016  * Redistribution and use in source and binary forms, with or without
0017  * modification, are permitted provided that the following conditions
0018  * are met:
0019  * 1. Redistributions of source code must retain the above copyright
0020  *    notice, this list of conditions and the following disclaimer.
0021  * 2. Redistributions in binary form must reproduce the above copyright
0022  *    notice, this list of conditions and the following disclaimer in the
0023  *    documentation and/or other materials provided with the distribution.
0024  *
0025  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0026  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0027  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0028  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0029  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0030  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0031  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0032  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0033  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0034  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0035  * POSSIBILITY OF SUCH DAMAGE.
0036  */
0037
0038 #ifdef HAVE_CONFIG_H
0039 #include "config.h"
0040 #endif
0041
0042 #include <rtems/score/threadimpl.h>
0043 #include <rtems/score/assert.h>
0044 #include <rtems/score/schedulerimpl.h>
0045
0046 States_Control _Thread_Clear_state_locked(
0047   Thread_Control *the_thread,
0048   States_Control  state
0049 )
0050 {
0051   States_Control previous_state;
0052
0053   _Assert( state != 0 );
0054   _Assert( _Thread_State_is_owner( the_thread ) );
0055
0056   previous_state = the_thread->current_state;
0057
0058   if ( ( previous_state & state ) != 0 ) {
0059     States_Control next_state;
0060
0061     next_state = _States_Clear( state, previous_state );
0062     the_thread->current_state = next_state;
0063
0064     if ( _States_Is_ready( next_state ) ) {
0065       _Scheduler_Unblock( the_thread );
0066     }
0067   }
0068
0069   return previous_state;
0070 }
0071
0072 States_Control _Thread_Clear_state(
0073   Thread_Control *the_thread,
0074   States_Control  state
0075 )
0076 {
0077   ISR_lock_Context lock_context;
0078   States_Control   previous_state;
0079
0080   _Thread_State_acquire( the_thread, &lock_context );
0081   previous_state = _Thread_Clear_state_locked( the_thread, state );
0082   _Thread_State_release( the_thread, &lock_context );
0083
0084   return previous_state;
0085 }