50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* Copyright (C) 1999-2020 Free Software Foundation, Inc.
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NOTE: This source is derived from an old version taken from the GNU C
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Library (glibc).
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdlib.h>
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#include "exit.h"
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#define atomic_write_barrier() __asm__ ("eieio" ::: "memory")
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/* Register a function to be called by exit. */
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int
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on_exit (void (*func) (int status, void *arg), void *arg)
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{
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struct exit_function *new = __new_exitfn (&__exit_funcs);
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if (new == NULL)
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return -1;
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#ifdef PTR_MANGLE
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PTR_MANGLE (func);
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#endif
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new->func.on.fn = func;
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new->func.on.arg = arg;
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atomic_write_barrier ();
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new->flavor = ef_on;
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return 0;
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}
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