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 #include "namespace.h" 35 #include <signal.h> 36 #include <errno.h> 37 #include <stdlib.h> 38 #include <pthread.h> 39 #include "un-namespace.h" 40 41 #include "thr_private.h" 42 43 #undef pthread_cleanup_push 44 #undef pthread_cleanup_pop 45 46 /* old binary compatible interfaces */ 47 __weak_reference(_thr_cleanup_pop, pthread_cleanup_pop); 48 __weak_reference(_thr_cleanup_pop, _pthread_cleanup_pop); 49 __weak_reference(_thr_cleanup_push, pthread_cleanup_push); 50 __weak_reference(_thr_cleanup_push, _pthread_cleanup_push); 51 52 /* help static linking when libc symbols have preference */ 53 __weak_reference(__thr_cleanup_push_imp, __pthread_cleanup_push_imp); 54 __weak_reference(__thr_cleanup_pop_imp, __pthread_cleanup_pop_imp); 55 56 void 57 __thr_cleanup_push_imp(void (*routine)(void *), void *arg, 58 struct _pthread_cleanup_info *info) 59 { 60 struct pthread *curthread = _get_curthread(); 61 struct pthread_cleanup *newbuf; 62 63 newbuf = (void *)info; 64 newbuf->routine = routine; 65 newbuf->routine_arg = arg; 66 newbuf->onheap = 0; 67 newbuf->prev = curthread->cleanup; 68 curthread->cleanup = newbuf; 69 } 70 71 void 72 __thr_cleanup_pop_imp(int execute) 73 { 74 struct pthread *curthread = _get_curthread(); 75 struct pthread_cleanup *old; 76 77 if ((old = curthread->cleanup) != NULL) { 78 curthread->cleanup = old->prev; 79 if (execute) 80 old->routine(old->routine_arg); 81 if (old->onheap) 82 free(old); 83 } 84 } 85 86 void 87 _thr_cleanup_push(void (*routine)(void *), void *arg) 88 { 89 struct pthread *curthread = _get_curthread(); 90 struct pthread_cleanup *newbuf; 91 #ifdef _PTHREAD_FORCED_UNWIND 92 curthread->unwind_disabled = 1; 93 #endif 94 if ((newbuf = (struct pthread_cleanup *) 95 malloc(sizeof(struct pthread_cleanup))) != NULL) { 96 newbuf->routine = routine; 97 newbuf->routine_arg = arg; 98 newbuf->onheap = 1; 99 newbuf->prev = curthread->cleanup; 100 curthread->cleanup = newbuf; 101 } 102 } 103 104 void 105 _thr_cleanup_pop(int execute) 106 { 107 __pthread_cleanup_pop_imp(execute); 108 } 109