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 18 #include <private/bionic_defs.h> 19 20 #include "pthread_internal.h" 21 22 class thread_local_dtor { 23 public: 24 void (*func) (void *); 25 void *arg; 26 void *dso_handle; // unused... 27 thread_local_dtor* next; 28 }; 29 30 extern "C" int __cxa_thread_atexit_impl(void (*func) (void *), void *arg, void *dso_handle); 31 extern "C" void __loader_add_thread_local_dtor(void* dso_handle) __attribute__((weak)); 32 extern "C" void __loader_remove_thread_local_dtor(void* dso_handle) __attribute__((weak)); 33 34 __BIONIC_WEAK_FOR_NATIVE_BRIDGE 35 int __cxa_thread_atexit_impl(void (*func) (void *), void *arg, void *dso_handle) { 36 thread_local_dtor* dtor = new thread_local_dtor(); 37 38 dtor->func = func; 39 dtor->arg = arg; 40 dtor->dso_handle = dso_handle; 41 42 pthread_internal_t* thread = __get_thread(); 43 dtor->next = thread->thread_local_dtors; 44 thread->thread_local_dtors = dtor; 45 if (__loader_add_thread_local_dtor != nullptr) { 46 __loader_add_thread_local_dtor(dso_handle); 47 } 48 return 0; 49 } 50 51 extern "C" __LIBC_HIDDEN__ void __cxa_thread_finalize() { 52 pthread_internal_t* thread = __get_thread(); 53 while (thread->thread_local_dtors != nullptr) { 54 thread_local_dtor* current = thread->thread_local_dtors; 55 thread->thread_local_dtors = current->next; 56 57 current->func(current->arg); 58 if (__loader_remove_thread_local_dtor != nullptr) { 59 __loader_remove_thread_local_dtor(current->dso_handle); 60 } 61 delete current; 62 } 63 } 64
