posix/src/pthreadinitthreads.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup POSIX_PTHREAD
0007  *
0008  * @brief POSIX Threads Initialize User Threads Body
0009  */
0010
0011 /*
0012  *  COPYRIGHT (c) 1989-2008.
0013  *  On-Line Applications Research Corporation (OAR).
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <rtems/posix/pthread.h>
0042
0043 #include <pthread.h>
0044
0045 #include <rtems/score/assert.h>
0046 #include <rtems/score/threadimpl.h>
0047 #include <rtems/score/interr.h>
0048
0049 void _POSIX_Threads_Initialize_user_thread( void )
0050 {
0051   int                                       eno;
0052   const posix_initialization_threads_table *user_thread;
0053   pthread_t                                 thread_id;
0054   pthread_attr_t                            attr;
0055
0056   user_thread = &_POSIX_Threads_User_thread_table;
0057
0058   /*
0059    *  Be careful .. if the default attribute set changes, this may need to.
0060    *
0061    *  Setting the attributes explicitly is critical, since we don't want
0062    *  to inherit the idle tasks attributes.
0063    */
0064
0065   /*
0066    * There is no way for these calls to fail in this situation.
0067    */
0068   eno = pthread_attr_init( &attr );
0069   _Assert( eno == 0 );
0070   eno = pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED );
0071   _Assert( eno == 0 );
0072   eno = pthread_attr_setstacksize( &attr, user_thread->stack_size );
0073   _Assert( eno == 0 );
0074
0075   eno = pthread_create(
0076     &thread_id,
0077     &attr,
0078     user_thread->thread_entry,
0079     NULL
0080   );
0081   if ( eno != 0 ) {
0082     _Internal_error( INTERNAL_ERROR_POSIX_INIT_THREAD_CREATE_FAILED );
0083   }
0084
0085   if ( _Thread_Global_constructor == 0 ) {
0086     _Thread_Global_constructor = thread_id;
0087   }
0088 }