1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef HAVE_DEPENDENT_EH_ABI
11#error this header may only be used with libc++abi or libcxxrt
12#endif
13
14namespace std {
15
16exception_ptr::~exception_ptr() _NOEXCEPT {
17 __cxa_decrement_exception_refcount(__ptr_);
18}
19
20exception_ptr::exception_ptr(const exception_ptr& other) _NOEXCEPT
21 : __ptr_(other.__ptr_)
22{
23 __cxa_increment_exception_refcount(__ptr_);
24}
25
26exception_ptr& exception_ptr::operator=(const exception_ptr& other) _NOEXCEPT
27{
28 if (__ptr_ != other.__ptr_)
29 {
30 __cxa_increment_exception_refcount(other.__ptr_);
31 __cxa_decrement_exception_refcount(__ptr_);
32 __ptr_ = other.__ptr_;
33 }
34 return *this;
35}
36
37nested_exception::nested_exception() _NOEXCEPT
38 : __ptr_(current_exception())
39{
40}
41
42nested_exception::~nested_exception() _NOEXCEPT
43{
44}
45
46_LIBCPP_NORETURN
47void
48nested_exception::rethrow_nested() const
49{
50 if (__ptr_ == nullptr)
51 terminate();
52 rethrow_exception(__ptr_);
53}
54
55exception_ptr current_exception() _NOEXCEPT
56{
57 // be nicer if there was a constructor that took a ptr, then
58 // this whole function would be just:
59 // return exception_ptr(__cxa_current_primary_exception());
60 exception_ptr ptr;
61 ptr.__ptr_ = __cxa_current_primary_exception();
62 return ptr;
63}
64
65_LIBCPP_NORETURN
66void rethrow_exception(exception_ptr p)
67{
68 __cxa_rethrow_primary_exception(p.__ptr_);
69 // if p.__ptr_ is NULL, above returns so we terminate
70 terminate();
71}
72
73} // namespace std
74