Retro68/gcc/newlib/libc/stdlib/quick_exit.c
Wolfgang Thaller ec13cc9ce7 fix newlib
2018-12-29 09:59:36 +01:00

89 lines
2.5 KiB
C

/*-
* Copyright (c) 2011 David Chisnall
* Copyright (c) 2015 embedded brains GmbH
* All rights reserved.
*
* 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 AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <stdlib.h>
#include <unistd.h>
#include <sys/lock.h>
/**
* Linked list of quick exit handlers. This is simpler than the atexit()
* version, because it is not required to support C++ destructors or
* DSO-specific cleanups.
*/
struct quick_exit_handler {
struct quick_exit_handler *next;
void (*cleanup)(void);
};
/**
* Lock protecting the handlers list.
*/
#ifndef __SINGLE_THREAD__
__LOCK_INIT(static, __at_quick_exit_mutex);
#endif
/**
* Stack of cleanup handlers. These will be invoked in reverse order when
*/
static struct quick_exit_handler *handlers;
int
at_quick_exit(void (*func)(void))
{
struct quick_exit_handler *h;
h = malloc(sizeof(*h));
if (NULL == h)
return (1);
h->cleanup = func;
#ifndef __SINGLE_THREAD__
__lock_acquire(__at_quick_exit_mutex);
#endif
h->next = handlers;
handlers = h;
#ifndef __SINGLE_THREAD__
__lock_release(__at_quick_exit_mutex);
#endif
return (0);
}
void
quick_exit(int status)
{
struct quick_exit_handler *h;
/*
* XXX: The C++ spec requires us to call std::terminate if there is an
* exception here.
*/
for (h = handlers; NULL != h; h = h->next)
h->cleanup();
_exit(status);
}