mirror of
https://github.com/jart/cosmopolitan.git
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111 lines
3.2 KiB
C++
111 lines
3.2 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "third_party/libcxx/exception"
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#include "third_party/libcxx/cstdio"
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#include "third_party/libcxx/atomic_support.hh"
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namespace std {
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_LIBCPP_SAFE_STATIC static std::terminate_handler __terminate_handler;
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#if _LIBCPP_STD_VER <= 14 || \
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defined(_LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS) || \
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defined(_LIBCPP_BUILDING_LIBRARY)
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_LIBCPP_SAFE_STATIC static std::unexpected_handler __unexpected_handler;
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// libcxxrt provides implementations of these functions itself.
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unexpected_handler set_unexpected(unexpected_handler func) _NOEXCEPT {
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return __libcpp_atomic_exchange(&__unexpected_handler, func);
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}
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unexpected_handler get_unexpected() _NOEXCEPT {
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return __libcpp_atomic_load(&__unexpected_handler);
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}
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_LIBCPP_NORETURN
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void unexpected() {
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(*get_unexpected())();
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// unexpected handler should not return
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terminate();
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}
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#endif
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terminate_handler set_terminate(terminate_handler func) _NOEXCEPT {
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return __libcpp_atomic_exchange(&__terminate_handler, func);
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}
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terminate_handler get_terminate() _NOEXCEPT {
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return __libcpp_atomic_load(&__terminate_handler);
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}
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#ifndef __EMSCRIPTEN__ // We provide this in JS
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_LIBCPP_NORETURN
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void terminate() _NOEXCEPT {
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#ifndef _LIBCPP_NO_EXCEPTIONS
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try {
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#endif // _LIBCPP_NO_EXCEPTIONS
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(*get_terminate())();
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// handler should not return
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fprintf(stderr, "terminate_handler unexpectedly returned\n");
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::abort();
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#ifndef _LIBCPP_NO_EXCEPTIONS
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} catch (...) {
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// handler should not throw exception
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fprintf(stderr, "terminate_handler unexpectedly threw an exception\n");
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::abort();
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}
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#endif // _LIBCPP_NO_EXCEPTIONS
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}
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#endif // !__EMSCRIPTEN__
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#if !defined(__EMSCRIPTEN__)
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bool uncaught_exception() _NOEXCEPT { return uncaught_exceptions() > 0; }
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int uncaught_exceptions() _NOEXCEPT {
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// #warning uncaught_exception not yet implemented
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fprintf(stderr, "uncaught_exceptions not yet implemented\n");
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::abort();
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}
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#endif // !__EMSCRIPTEN__
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exception::~exception() _NOEXCEPT {}
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const char* exception::what() const _NOEXCEPT { return "std::exception"; }
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bad_exception::~bad_exception() _NOEXCEPT {}
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const char* bad_exception::what() const _NOEXCEPT {
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return "std::bad_exception";
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}
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bad_alloc::bad_alloc() _NOEXCEPT {}
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bad_alloc::~bad_alloc() _NOEXCEPT {}
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const char* bad_alloc::what() const _NOEXCEPT { return "std::bad_alloc"; }
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bad_array_new_length::bad_array_new_length() _NOEXCEPT {}
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bad_array_new_length::~bad_array_new_length() _NOEXCEPT {}
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const char* bad_array_new_length::what() const _NOEXCEPT {
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return "bad_array_new_length";
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}
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bad_cast::bad_cast() _NOEXCEPT {}
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bad_typeid::bad_typeid() _NOEXCEPT {}
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bad_cast::~bad_cast() _NOEXCEPT {}
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const char* bad_cast::what() const _NOEXCEPT { return "std::bad_cast"; }
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bad_typeid::~bad_typeid() _NOEXCEPT {}
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const char* bad_typeid::what() const _NOEXCEPT { return "std::bad_typeid"; }
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} // namespace std
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