1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef REMOTING_HOST_SHUTDOWN_WATCHDOG_H_
#define REMOTING_HOST_SHUTDOWN_WATCHDOG_H_
#include "base/macros.h"
#include "base/synchronization/lock.h"
#include "base/threading/watchdog.h"
namespace remoting {
// This implements a watchdog timer that ensures the host process eventually
// terminates, even if some threads are blocked or being kept alive for
// some reason. This is not expected to trigger if host shutdown is working
// correctly (on a normally loaded system). The triggering of the alarm
// indicates a sign of trouble, and so the Alarm() method will log some
// diagnostic information before shutting down the process.
class ShutdownWatchdog : public base::Watchdog {
public:
// Creates a watchdog that waits for |duration| (after the watchdog is
// armed) before shutting down the process.
explicit ShutdownWatchdog(const base::TimeDelta& duration);
// This method should be called to set the process's exit-code before arming
// the watchdog. Otherwise an exit-code of 0 is assumed.
void SetExitCode(int exit_code);
void Alarm() override;
private:
int exit_code_;
// Protects |exit_code_|, since Alarm() gets called on a separate thread.
base::Lock lock_;
DISALLOW_COPY_AND_ASSIGN(ShutdownWatchdog);
};
} // namespace remoting
#endif // REMOTING_HOST_SHUTDOWN_WATCHDOG_H_
|
