1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)exit.c 8.1 (Berkeley) 6/4/93 30 * $FreeBSD: src/lib/libc/stdlib/exit.c,v 1.9 2007/01/09 00:28:09 imp Exp $ 31 */ 32 33 #include "namespace.h" 34 #include <stdlib.h> 35 #include <unistd.h> 36 #include "un-namespace.h" 37 38 #include "atexit.h" 39 #include "libc_private.h" 40 41 void (*__cleanup)(void); 42 43 /* 44 * This variable is zero until a process has created a thread. 45 * It is used to avoid calling locking functions in libc when they 46 * are not required. By default, libc is intended to be(come) 47 * thread-safe, but without a (significant) penalty to non-threaded 48 * processes. 49 */ 50 int __isthreaded = 0; 51 52 /* 53 * Exit, flushing stdio buffers if necessary. 54 */ 55 void 56 exit(int status) 57 { 58 /* Ensure that the auto-initialization routine is linked in: */ 59 extern int _thread_autoinit_dummy_decl; 60 61 _thread_autoinit_dummy_decl = 1; 62 63 /* Call TLS destructors, if any. */ 64 _thread_finalize(); 65 __cxa_finalize(NULL); 66 if (__cleanup) 67 (*__cleanup)(); 68 _exit(status); 69 } 70 71 /* 72 * ISO C99 added the _Exit() function that results in immediate program 73 * termination without triggering signals or atexit()-registered functions. 74 * In POSIX this is equivalent to the _exit() function. 75 */ 76 void 77 _Exit(int status) 78 { 79 _exit(status); 80 } 81