1 /* $OpenBSD: atexit.h,v 1.12 2017/12/16 20:06:56 guenther Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Daniel Hartmeier 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * - Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * - Redistributions in binary form must reproduce the above 14 * copyright notice, this list of conditions and the following 15 * disclaimer in the documentation and/or other materials provided 16 * with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 22 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 26 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 28 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 * 31 */ 32 33 struct atexit { 34 struct atexit *next; /* next in list */ 35 int ind; /* next index in this table */ 36 int max; /* max entries >= ATEXIT_SIZE */ 37 struct atexit_fn { 38 void (*fn_ptr)(void *); 39 void *fn_arg; /* argument for CXA callback */ 40 void *fn_dso; /* shared module handle */ 41 } fns[1]; /* the table itself */ 42 }; 43 44 /* a chain of these are hung off each thread's TIB's tib_atexit member */ 45 struct thread_atexit_fn { 46 void (*func)(void *); 47 void *arg; 48 struct thread_atexit_fn *next; 49 }; 50 51 __BEGIN_HIDDEN_DECLS 52 extern struct atexit *__atexit; /* points to head of LIFO stack */ 53 __END_HIDDEN_DECLS 54 55 int __cxa_atexit(void (*)(void *), void *, void *); 56 int __cxa_thread_atexit(void (*)(void *), void *, void *); 57 void __cxa_finalize(void *); 58 59 PROTO_NORMAL(__cxa_atexit); 60 PROTO_STD_DEPRECATED(__cxa_thread_atexit); 61 PROTO_NORMAL(__cxa_finalize); 62