exit.c revision 35502
11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1990, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 131573Srgrimes * 3. All advertising materials mentioning features or use of this software 141573Srgrimes * must display the following acknowledgement: 151573Srgrimes * This product includes software developed by the University of 161573Srgrimes * California, Berkeley and its contributors. 171573Srgrimes * 4. Neither the name of the University nor the names of its contributors 181573Srgrimes * may be used to endorse or promote products derived from this software 191573Srgrimes * without specific prior written permission. 201573Srgrimes * 211573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311573Srgrimes * SUCH DAMAGE. 321573Srgrimes */ 331573Srgrimes 341573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 351573Srgrimesstatic char sccsid[] = "@(#)exit.c 8.1 (Berkeley) 6/4/93"; 361573Srgrimes#endif /* LIBC_SCCS and not lint */ 371573Srgrimes 381573Srgrimes#include <stdlib.h> 391573Srgrimes#include <unistd.h> 401573Srgrimes#include "atexit.h" 411573Srgrimes 421573Srgrimesvoid (*__cleanup)(); 431573Srgrimes 441573Srgrimes/* 4535125Sjb * This variable is zero until a process has created a thread. 4635125Sjb * It is used to avoid calling locking functions in libc when they 4735125Sjb * are not required. By default, libc is intended to be(come) 4835125Sjb * thread-safe, but without a (significant) penalty to non-threaded 4935125Sjb * processes. 5035125Sjb */ 5135125Sjbint __isthreaded = 0; 5235125Sjb 5335125Sjb/* 541573Srgrimes * Exit, flushing stdio buffers if necessary. 551573Srgrimes */ 561573Srgrimesvoid 571573Srgrimesexit(status) 581573Srgrimes int status; 591573Srgrimes{ 601573Srgrimes register struct atexit *p; 611573Srgrimes register int n; 621573Srgrimes 6335502Sjb#ifdef _THREAD_SAFE 6435502Sjb extern int _thread_autoinit_dummy_decl; 6535502Sjb /* Ensure that the auto-initialization routine is linked in: */ 6635502Sjb _thread_autoinit_dummy_decl = 1; 6735502Sjb#endif 6835502Sjb 691573Srgrimes for (p = __atexit; p; p = p->next) 701573Srgrimes for (n = p->ind; --n >= 0;) 711573Srgrimes (*p->fns[n])(); 721573Srgrimes if (__cleanup) 731573Srgrimes (*__cleanup)(); 741573Srgrimes _exit(status); 751573Srgrimes} 76