1 //===----------------------------------------------------------------------===// 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include <new> 10 11 #include "include/atomic_support.h" 12 13 #if defined(_LIBCPP_ABI_MICROSOFT) 14 # if !defined(_LIBCPP_ABI_VCRUNTIME) 15 # define _LIBPCPP_DEFINE_NEW_HANDLER 16 # endif 17 #elif defined(LIBCXX_BUILDING_LIBCXXABI) 18 // nothing to do, we use the one from libc++abi 19 #elif defined(LIBCXXRT) 20 # define _LIBPCPP_DEFINE_NEW_HANDLER 21 #elif defined(__GLIBCXX__) 22 // nothing to do, we use the one from libstdc++/libsupc++ 23 #else 24 # define _LIBPCPP_DEFINE_NEW_HANDLER 25 #endif 26 27 #if defined(_LIBPCPP_DEFINE_NEW_HANDLER) 28 29 namespace std { // purposefully not versioned 30 31 static constinit std::new_handler __new_handler = nullptr; 32 33 new_handler set_new_handler(new_handler handler) noexcept { return __libcpp_atomic_exchange(&__new_handler, handler); } 34 35 new_handler get_new_handler() noexcept { return __libcpp_atomic_load(&__new_handler); } 36 37 } // namespace std 38 39 #endif // _LIBPCPP_DEFINE_NEW_HANDLER 40