/* Copyright (C) 1999, 2001, 2002 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 modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library 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 Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include #include #include "exit.h" #undef __cxa_atexit /* Register a function to be called by exit or when a shared library is unloaded. This function is only called from code generated by the C++ compiler. */ int __cxa_atexit (void (*func) (void *), void *arg, void *d) { struct exit_function *new = __new_exitfn (); if (new == NULL) return -1; new->flavor = ef_cxa; new->func.cxa.fn = (void (*) (void *, int)) func; new->func.cxa.arg = arg; new->func.cxa.dso_handle = d; return 0; } INTDEF(__cxa_atexit) /* 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]; }