2 * Copyright 2017 Facebook, Inc.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
21 #include <folly/UncaughtExceptions.h>
23 namespace folly { namespace detail {
26 * Used to check if a new uncaught exception was thrown by monitoring the
27 * number of uncaught exceptions.
30 * - create a new UncaughtExceptionCounter object
31 * - call isNewUncaughtException() on the new object to check if a new
32 * uncaught exception was thrown since the object was created
34 class UncaughtExceptionCounter {
36 UncaughtExceptionCounter() noexcept
37 : exceptionCount_(folly::uncaught_exceptions()) {}
39 UncaughtExceptionCounter(const UncaughtExceptionCounter& other) noexcept
40 : exceptionCount_(other.exceptionCount_) {}
42 bool isNewUncaughtException() noexcept {
43 return folly::uncaught_exceptions() > exceptionCount_;