1 /*- 2 * Copyright (c) 2011 David Chisnall 3 * 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <stdlib.h> 30 #include <pthread.h> 31 32 /** 33 * Linked list of quick exit handlers. This is simpler than the atexit() 34 * version, because it is not required to support C++ destructors or 35 * DSO-specific cleanups. 36 */ 37 struct quick_exit_handler { 38 struct quick_exit_handler *next; 39 void (*cleanup)(void); 40 }; 41 42 __attribute((weak)) 43 void _ZSt9terminatev(void); 44 45 /** 46 * Lock protecting the handlers list. 47 */ 48 static pthread_mutex_t atexit_mutex = PTHREAD_MUTEX_INITIALIZER; 49 /** 50 * Stack of cleanup handlers. These will be invoked in reverse order when 51 */ 52 static struct quick_exit_handler *handlers; 53 54 int 55 at_quick_exit(void (*func)(void)) 56 { 57 struct quick_exit_handler *h = malloc(sizeof(struct quick_exit_handler)); 58 59 if (0 == h) { 60 return 1; 61 } 62 h->cleanup = func; 63 pthread_mutex_lock(&atexit_mutex); 64 h->next = handlers; 65 handlers = h; 66 pthread_mutex_unlock(&atexit_mutex); 67 return 0; 68 } 69 70 void quick_exit(int status) 71 { 72 /* 73 * XXX: The C++ spec requires us to call std::terminate if there is an 74 * exception here. 75 */ 76 for (struct quick_exit_handler *h = handlers ; NULL != h ; h = h->next) 77 { 78 h->cleanup(); 79 } 80 _Exit(status); 81 } 82