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 /** 43 * Lock protecting the handlers list. 44 */ 45 static pthread_mutex_t atexit_mutex = PTHREAD_MUTEX_INITIALIZER; 46 /** 47 * Stack of cleanup handlers. These will be invoked in reverse order when 48 */ 49 static struct quick_exit_handler *handlers; 50 51 int 52 at_quick_exit(void (*func)(void)) 53 { 54 struct quick_exit_handler *h; 55 56 h = malloc(sizeof(*h)); 57 58 if (NULL == h) 59 return (1); 60 h->cleanup = func; 61 pthread_mutex_lock(&atexit_mutex); 62 h->next = handlers; 63 handlers = h; 64 pthread_mutex_unlock(&atexit_mutex); 65 return (0); 66 } 67 68 void 69 quick_exit(int status) 70 { 71 struct quick_exit_handler *h; 72 73 /* 74 * XXX: The C++ spec requires us to call std::terminate if there is an 75 * exception here. 76 */ 77 for (h = handlers; NULL != h; h = h->next) 78 h->cleanup(); 79 _Exit(status); 80 } 81