9851b3400a
9899:2011 Appendix K 3.7.4.1. Other needed supporting types, defines and constraint_handler infrastructure is added as specified in the C11 spec. Submitted by: Tom Rix <trix@juniper.net> Sponsored by: Juniper Networks Discussed with: ed MFC after: 3 weeks Differential revision: https://reviews.freebsd.org/D9903 Differential revision: https://reviews.freebsd.org/D10161
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/*-
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* Copyright (c) 2017 Juniper Networks. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/types.h>
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#include <machine/atomic.h>
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#include <errno.h>
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#include <pthread.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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/*
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* Rationale recommends allocating new memory each time.
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*/
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static constraint_handler_t *_ch = NULL;
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static pthread_mutex_t ch_lock = PTHREAD_MUTEX_INITIALIZER;
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constraint_handler_t
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set_constraint_handler_s(constraint_handler_t handler)
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{
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constraint_handler_t *new, *old, ret;
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new = malloc(sizeof(constraint_handler_t));
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if (new == NULL)
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return (NULL);
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*new = handler;
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if (__isthreaded)
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_pthread_mutex_lock(&ch_lock);
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old = _ch;
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_ch = new;
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if (__isthreaded)
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_pthread_mutex_unlock(&ch_lock);
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if (old == NULL) {
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ret = NULL;
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} else {
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ret = *old;
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free(old);
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}
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return (ret);
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}
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void
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__throw_constraint_handler_s(const char * restrict msg, errno_t error)
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{
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constraint_handler_t ch;
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if (__isthreaded)
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_pthread_mutex_lock(&ch_lock);
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ch = _ch != NULL ? *_ch : NULL;
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if (__isthreaded)
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_pthread_mutex_unlock(&ch_lock);
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if (ch != NULL)
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ch(msg, NULL, error);
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}
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void
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abort_handler_s(const char * restrict msg __unused,
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void * restrict ptr __unused, errno_t error __unused)
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{
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abort();
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}
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void
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ignore_handler_s(const char * restrict msg __unused,
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void * restrict ptr __unused, errno_t error __unused)
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{
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}
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