diff options
Diffstat (limited to 'stdlib/atexit.c')
| -rw-r--r-- | stdlib/atexit.c | 75 |
1 files changed, 12 insertions, 63 deletions
diff --git a/stdlib/atexit.c b/stdlib/atexit.c index e9648d60e1..19a1575d2c 100644 --- a/stdlib/atexit.c +++ b/stdlib/atexit.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991, 1996, 1999 Free Software Foundation, Inc. +/* Copyright (C) 1991, 1996, 1999, 2001 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -16,75 +16,24 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include <bits/libc-lock.h> #include <stdlib.h> #include "exit.h" +/* This is defined by newer gcc version unique for each module. */ +extern void *__dso_handle __attribute__ ((__weak__)); + + /* Register FUNC to be executed by `exit'. */ int atexit (void (*func) (void)) { - struct exit_function *new = __new_exitfn (); - - if (new == NULL) - return -1; - - new->flavor = ef_at; - new->func.at = func; - return 0; + return __cxa_atexit ((void (*) (void *)) func, NULL, + &__dso_handle == NULL ? NULL : __dso_handle); } - -/* We change global data, so we need locking. */ -__libc_lock_define_initialized (static, lock) - - -static struct exit_function_list initial; -struct exit_function_list *__exit_funcs = &initial; - -struct exit_function * -__new_exitfn (void) -{ - struct exit_function_list *l; - size_t i = 0; - - __libc_lock_lock (lock); - - for (l = __exit_funcs; l != NULL; l = l->next) - { - for (i = 0; i < l->idx; ++i) - if (l->fns[i].flavor == ef_free) - break; - if (i < l->idx) - break; - - if (l->idx < sizeof (l->fns) / sizeof (l->fns[0])) - { - i = l->idx++; - break; - } - } - - if (l == NULL) - { - l = (struct exit_function_list *) - malloc (sizeof (struct exit_function_list)); - if (l != NULL) - { - l->next = __exit_funcs; - __exit_funcs = l; - - l->idx = 1; - i = 0; - } - } - - /* Mark entry as used, but we don't know the flavor now. */ - if (l != NULL) - l->fns[i].flavor = ef_us; - - __libc_lock_unlock (lock); - - return l == NULL ? NULL : &l->fns[i]; -} +/* Hide the symbol so that no definition but the one locally in the + executable or DSO is used. */ +#ifdef HAVE_DOT_HIDDEN +asm (".hidden\tatexit"); +#endif |