1 /*
2 * Copyright (c) Facebook, Inc. and its affiliates.
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
17 #include <folly/ExceptionWrapper.h>
18
19 #include <iostream>
20
21 #include <folly/GLog.h>
22
23 namespace folly {
24
25 exception_wrapper::VTable const exception_wrapper::uninit_{
26 &noop_<void, exception_wrapper const*, exception_wrapper*>,
27 &noop_<void, exception_wrapper*, exception_wrapper*>,
28 &noop_<void, exception_wrapper*>,
29 &noop_<void, exception_wrapper const*>,
30 &uninit_type_,
31 &noop_<std::exception const*, exception_wrapper const*>,
32 &noop_<exception_wrapper, exception_wrapper const*>};
33
34 exception_wrapper::VTable const exception_wrapper::ExceptionPtr::ops_{
35 copy_, move_, delete_, throw_, type_, get_exception_, get_exception_ptr_};
36
37 exception_wrapper::VTable const exception_wrapper::SharedPtr::ops_{
38 copy_, move_, delete_, throw_, type_, get_exception_, get_exception_ptr_};
39
from_exception_ptr(std::exception_ptr const & ptr)40 exception_wrapper exception_wrapper::from_exception_ptr(
41 std::exception_ptr const& ptr) noexcept {
42 return from_exception_ptr(folly::copy(ptr));
43 }
44
from_exception_ptr(std::exception_ptr && ptr)45 exception_wrapper exception_wrapper::from_exception_ptr(
46 std::exception_ptr&& ptr) noexcept {
47 return !ptr ? exception_wrapper() : exception_wrapper(std::move(ptr));
48 }
49
exception_wrapper(std::exception_ptr const & ptr)50 exception_wrapper::exception_wrapper(std::exception_ptr const& ptr) noexcept
51 : exception_wrapper{folly::copy(ptr)} {}
52
exception_wrapper(std::exception_ptr && ptr)53 exception_wrapper::exception_wrapper(std::exception_ptr&& ptr) noexcept {
54 if (ptr) {
55 ::new (&eptr_) ExceptionPtr{std::move(ptr)};
56 vptr_ = &ExceptionPtr::ops_;
57 }
58 }
59
onNoExceptionError(char const * const name)60 [[noreturn]] void exception_wrapper::onNoExceptionError(
61 char const* const name) {
62 std::ios_base::Init ioinit_; // ensure std::cerr is alive
63 std::cerr << "Cannot use `" << name
64 << "` with an empty folly::exception_wrapper" << std::endl;
65 std::terminate();
66 }
67
exceptionStr(exception_wrapper const & ew)68 fbstring exceptionStr(exception_wrapper const& ew) {
69 return ew.what();
70 }
71
72 } // namespace folly
73