source: rtems/cpukit/posix/src/pthreadinitthreads.c

/* SPDX-License-Identifier: BSD-2-Clause */

/**
 * @file
 *
 * @ingroup POSIX_PTHREAD
 *
 * @brief POSIX Threads Initialize User Threads Body
 */

/*
 *  COPYRIGHT (c) 1989-2008.
 *  On-Line Applications Research Corporation (OAR).
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <rtems/posix/pthread.h>

#include <pthread.h>

#include <rtems/score/assert.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/interr.h>

void _POSIX_Threads_Initialize_user_thread( void )
{
  int                                       eno;
  const posix_initialization_threads_table *user_thread;
  pthread_t                                 thread_id;
  pthread_attr_t                            attr;

  user_thread = &_POSIX_Threads_User_thread_table;

  /*
   *  Be careful .. if the default attribute set changes, this may need to.
   *
   *  Setting the attributes explicitly is critical, since we don't want
   *  to inherit the idle tasks attributes.
   */

  /*
   * There is no way for these calls to fail in this situation.
   */
  eno = pthread_attr_init( &attr );
  _Assert( eno == 0 );
  eno = pthread_attr_setinheritsched( &attr, PTHREAD_EXPLICIT_SCHED );
  _Assert( eno == 0 );
  eno = pthread_attr_setstacksize( &attr, user_thread->stack_size );
  _Assert( eno == 0 );

  eno = pthread_create(
    &thread_id,
    &attr,
    user_thread->thread_entry,
    NULL
  );
  if ( eno != 0 ) {
    _Internal_error( INTERNAL_ERROR_POSIX_INIT_THREAD_CREATE_FAILED );
  }

  if ( _Thread_Global_constructor == 0 ) {
    _Thread_Global_constructor = thread_id;
  }
}