score/src/threadstart.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_Start().
0010  */
0011
0012 /*
0013  *  COPYRIGHT (c) 1989-1999.
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/isrlevel.h>
0044 #include <rtems/score/userextimpl.h>
0045
0046 Status_Control _Thread_Start(
0047   Thread_Control                 *the_thread,
0048   const Thread_Entry_information *entry,
0049   ISR_lock_Context               *lock_context
0050 )
0051 {
0052   Per_CPU_Control *cpu_self;
0053
0054   _Thread_State_acquire_critical( the_thread, lock_context );
0055
0056   if ( !_States_Is_dormant( the_thread->current_state ) ) {
0057     _Thread_State_release( the_thread, lock_context );
0058     return STATUS_INCORRECT_STATE;
0059   }
0060
0061   the_thread->Start.Entry = *entry;
0062   _Thread_Load_environment( the_thread );
0063   _Thread_Clear_state_locked( the_thread, STATES_ALL_SET );
0064
0065   cpu_self = _Thread_Dispatch_disable_critical( lock_context );
0066   _Thread_State_release( the_thread, lock_context );
0067
0068   _User_extensions_Thread_start( the_thread );
0069
0070   _Thread_Dispatch_enable( cpu_self );
0071   return STATUS_SUCCESSFUL;
0072 }