2 * Copyright 2016 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.
19 * Copyright 2016 Facebook, Inc.
21 * Licensed under the Apache License, Version 2.0 (the "License");
22 * you may not use this file except in compliance with the License.
23 * You may obtain a copy of the License at
25 * http://www.apache.org/licenses/LICENSE-2.0
27 * Unless required by applicable law or agreed to in writing, software
28 * distributed under the License is distributed on an "AS IS" BASIS,
29 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
30 * See the License for the specific language governing permissions and
31 * limitations under the License.
36 #include <glog/logging.h>
37 #include <gtest/gtest.h>
39 // A simple class that tracks how often instances of the class and
40 // subclasses are created, and the ordering. Also tracks a global
41 // unique counter for each object.
42 std::atomic<size_t> global_counter(19770326);
44 static std::vector<Watchdog*>& creation_order() {
45 static std::vector<Watchdog*> ret;
49 Watchdog() : serial_number(++global_counter) {
50 creation_order().push_back(this);
54 if (creation_order().back() != this) {
55 throw std::out_of_range("Watchdog destruction order mismatch");
57 creation_order().pop_back();
60 const size_t serial_number;
61 size_t livingWatchdogCount() const { return creation_order().size(); }
63 Watchdog(const Watchdog&) = delete;
64 Watchdog& operator=(const Watchdog&) = delete;
65 Watchdog(Watchdog&&) noexcept = default;
66 Watchdog& operator=(Watchdog&&) noexcept = default;
69 // Some basic types we use for tracking.
70 struct ChildWatchdog : public Watchdog {};
71 struct GlobalWatchdog : public Watchdog {};
72 struct UnregisteredWatchdog : public Watchdog {};