__cxa_thread_atexit_impl.cpp revision df79c330d895af31f39ee301dee62731fa586168 
1/*
2 * Copyright (C) 2015 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16#include <sys/cdefs.h>
17
18struct thread_local_dtor {
19  void (*func) (void *);
20  void *arg;
21  void *dso_handle; // unused...
22  thread_local_dtor* next;
23};
24
25__thread thread_local_dtor* thread_local_dtors = nullptr;
26
27extern "C" int __cxa_thread_atexit_impl(void (*func) (void *), void *arg, void *dso_handle) {
28  thread_local_dtor* dtor = new thread_local_dtor();
29
30  dtor->func = func;
31  dtor->arg = arg;
32  dtor->dso_handle = dso_handle;
33  dtor->next = thread_local_dtors;
34
35  thread_local_dtors = dtor;
36
37  return 0;
38}
39
40extern "C" __LIBC_HIDDEN__ void __cxa_thread_finalize() {
41  while (thread_local_dtors != nullptr) {
42    thread_local_dtor* current = thread_local_dtors;
43    thread_local_dtors = current->next;
44
45    current->func(current->arg);
46    delete current;
47  }
48}
49