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/* Copyright (C) 1999-2019 Free Software Foundation, Inc.
NOTE: This source is derived from an old version taken from the GNU C
Library (glibc).
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include "exit.h"
#define atomic_write_barrier() __asm__ ("eieio" ::: "memory")
/* Register a function to be called by exit. */
int
on_exit (void (*func) (int status, void *arg), void *arg)
{
struct exit_function *new = __new_exitfn (&__exit_funcs);
if (new == NULL)
return -1;
#ifdef PTR_MANGLE
PTR_MANGLE (func);
#endif
new->func.on.fn = func;
new->func.on.arg = arg;
atomic_write_barrier ();
new->flavor = ef_on;
return 0;
}
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