posix/src/pthreaddetach.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup POSIXAPI
0007  *
0008  * @brief Detaching a Thread
0009  */
0010
0011 /*
0012  *  COPYRIGHT (c) 1989-2014.
0013  *  On-Line Applications Research Corporation (OAR).
0014  *
0015  *  Copyright (c) 2016 embedded brains GmbH & Co. KG
0016  *
0017  * Redistribution and use in source and binary forms, with or without
0018  * modification, are permitted provided that the following conditions
0019  * are met:
0020  * 1. Redistributions of source code must retain the above copyright
0021  *    notice, this list of conditions and the following disclaimer.
0022  * 2. Redistributions in binary form must reproduce the above copyright
0023  *    notice, this list of conditions and the following disclaimer in the
0024  *    documentation and/or other materials provided with the distribution.
0025  *
0026  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0027  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0028  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0029  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0030  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0031  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0032  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0033  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0034  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0035  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0036  * POSSIBILITY OF SUCH DAMAGE.
0037  */
0038
0039 #ifdef HAVE_CONFIG_H
0040 #include "config.h"
0041 #endif
0042
0043 #include <pthread.h>
0044 #include <errno.h>
0045
0046 #include <rtems/score/threadimpl.h>
0047
0048 /**
0049  * 16.1.4 Detaching a Thread, P1003.1c/Draft 10, p. 149
0050  */
0051 int pthread_detach( pthread_t thread )
0052 {
0053   Thread_Control   *the_thread;
0054   ISR_lock_Context  lock_context;
0055   Per_CPU_Control  *cpu_self;
0056
0057   the_thread = _Thread_Get( thread, &lock_context );
0058
0059   if ( the_thread == NULL ) {
0060     return ESRCH;
0061   }
0062
0063   _Thread_State_acquire_critical( the_thread, &lock_context );
0064
0065   the_thread->Life.state |= THREAD_LIFE_DETACHED;
0066   _Thread_Clear_state_locked( the_thread, STATES_WAITING_FOR_JOIN_AT_EXIT );
0067
0068   cpu_self = _Thread_Dispatch_disable_critical( &lock_context );
0069   _Thread_State_release( the_thread, &lock_context );
0070   _Thread_Dispatch_enable( cpu_self );
0071   return 0;
0072 }