posix/src/setcancelstate.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup POSIXAPI
0007  *
0008  * @brief Setting Cancelability State
0009  */
0010
0011 /*
0012  *  COPYRIGHT (c) 1989-2009.
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/isr.h>
0047 #include <rtems/score/threadimpl.h>
0048
0049 /*
0050  *  18.2.2 Setting Cancelability State, P1003.1c/Draft 10, p. 183
0051  */
0052
0053 int pthread_setcancelstate(
0054   int  state,
0055   int *oldstate
0056 )
0057 {
0058   Thread_Life_state new_life_protection;
0059   Thread_Life_state previous_life_state;
0060
0061   if ( _ISR_Is_in_progress() ) {
0062     return EPROTO;
0063   }
0064
0065   if ( state == PTHREAD_CANCEL_DISABLE ) {
0066     new_life_protection = THREAD_LIFE_PROTECTED;
0067   } else if ( state == PTHREAD_CANCEL_ENABLE ) {
0068     new_life_protection = 0;
0069   } else {
0070     return EINVAL;
0071   }
0072
0073   previous_life_state = _Thread_Set_life_protection( new_life_protection );
0074
0075   if ( oldstate != NULL ) {
0076     if ( ( previous_life_state & THREAD_LIFE_PROTECTED ) != 0 ) {
0077       *oldstate = PTHREAD_CANCEL_DISABLE;
0078     } else {
0079       *oldstate = PTHREAD_CANCEL_ENABLE;
0080     }
0081   }
0082
0083   return 0;
0084 }