1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 5 * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the author nor the names of any co-contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "namespace.h" 37 #include <signal.h> 38 #include <errno.h> 39 #include <stdlib.h> 40 #include <pthread.h> 41 #include "un-namespace.h" 42 43 #include "thr_private.h" 44 45 #undef pthread_cleanup_push 46 #undef pthread_cleanup_pop 47 48 /* old binary compatible interfaces */ 49 __weak_reference(_thr_cleanup_pop, pthread_cleanup_pop); 50 __weak_reference(_thr_cleanup_pop, _pthread_cleanup_pop); 51 __weak_reference(_thr_cleanup_push, pthread_cleanup_push); 52 __weak_reference(_thr_cleanup_push, _pthread_cleanup_push); 53 54 /* help static linking when libc symbols have preference */ 55 __weak_reference(__thr_cleanup_push_imp, __pthread_cleanup_push_imp); 56 __weak_reference(__thr_cleanup_pop_imp, __pthread_cleanup_pop_imp); 57 58 void 59 __thr_cleanup_push_imp(void (*routine)(void *), void *arg, 60 struct _pthread_cleanup_info *info) 61 { 62 struct pthread *curthread = _get_curthread(); 63 struct pthread_cleanup *newbuf; 64 65 newbuf = (void *)info; 66 newbuf->routine = routine; 67 newbuf->routine_arg = arg; 68 newbuf->onheap = 0; 69 newbuf->prev = curthread->cleanup; 70 curthread->cleanup = newbuf; 71 } 72 73 void 74 __thr_cleanup_pop_imp(int execute) 75 { 76 struct pthread *curthread = _get_curthread(); 77 struct pthread_cleanup *old; 78 79 if ((old = curthread->cleanup) != NULL) { 80 curthread->cleanup = old->prev; 81 if (execute) 82 old->routine(old->routine_arg); 83 if (old->onheap) 84 free(old); 85 } 86 } 87 88 void 89 _thr_cleanup_push(void (*routine)(void *), void *arg) 90 { 91 struct pthread *curthread = _get_curthread(); 92 struct pthread_cleanup *newbuf; 93 #ifdef _PTHREAD_FORCED_UNWIND 94 curthread->unwind_disabled = 1; 95 #endif 96 if ((newbuf = (struct pthread_cleanup *) 97 malloc(sizeof(struct pthread_cleanup))) != NULL) { 98 newbuf->routine = routine; 99 newbuf->routine_arg = arg; 100 newbuf->onheap = 1; 101 newbuf->prev = curthread->cleanup; 102 curthread->cleanup = newbuf; 103 } 104 } 105 106 void 107 _thr_cleanup_pop(int execute) 108 { 109 __pthread_cleanup_pop_imp(execute); 110 } 111