1/*
2 * Copyright 2015-present Facebook, Inc.
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#pragma once
17
18#include <memory>
19#include <stdexcept>
20#include <vector>
21
22#include <glog/logging.h>
23
24#include <folly/portability/GTest.h>
25
26struct Watchdog {
27 static std::vector<Watchdog*>& creation_order();
28
29 Watchdog();
30
31 ~Watchdog() {
32 if (creation_order().back() != this) {
33 LOG(FATAL) << "Watchdog destruction order mismatch";
34 }
35 creation_order().pop_back();
36 }
37
38 const size_t serial_number;
39 size_t livingWatchdogCount() const {
40 return creation_order().size();
41 }
42
43 Watchdog(const Watchdog&) = delete;
44 Watchdog& operator=(const Watchdog&) = delete;
45 Watchdog(Watchdog&&) noexcept = default;
46 Watchdog& operator=(Watchdog&&) noexcept = default;
47};
48
49// Some basic types we use for tracking.
50struct ChildWatchdog : public Watchdog {};
51struct GlobalWatchdog : public Watchdog {};
52struct UnregisteredWatchdog : public Watchdog {};
53