44 lines · cpp
1//===-- Implementation of atexit ------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/stdlib/atexit.h"10#include "hdr/types/atexithandler_t.h"11#include "src/__support/common.h"12#include "src/__support/macros/config.h"13#include "src/stdlib/exit_handler.h"14 15namespace LIBC_NAMESPACE_DECL {16 17constinit ExitCallbackList atexit_callbacks;18Mutex handler_list_mtx(false, false, false, false);19[[gnu::weak]] extern void teardown_main_tls();20 21extern "C" {22 23int __cxa_atexit(AtExitCallback *callback, void *payload, void *) {24 return add_atexit_unit(atexit_callbacks, {callback, payload});25}26 27void __cxa_finalize(void *dso) {28 if (!dso) {29 call_exit_callbacks(atexit_callbacks);30 if (teardown_main_tls)31 teardown_main_tls();32 }33}34 35} // extern "C"36 37LLVM_LIBC_FUNCTION(int, atexit, (__atexithandler_t callback)) {38 return add_atexit_unit(39 atexit_callbacks,40 {&stdc_at_exit_func, reinterpret_cast<void *>(callback)});41}42 43} // namespace LIBC_NAMESPACE_DECL44