JeVois  1.21
JeVois Smart Embedded Machine Vision Toolkit
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Watchdog.H
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1// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2//
3// JeVois Smart Embedded Machine Vision Toolkit - Copyright (C) 2021 by Laurent Itti, the University of Southern
4// California (USC), and iLab at USC. See http://iLab.usc.edu and http://jevois.org for information about this project.
5//
6// This file is part of the JeVois Smart Embedded Machine Vision Toolkit. This program is free software; you can
7// redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software
8// Foundation, version 2. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
9// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
10// License for more details. You should have received a copy of the GNU General Public License along with this program;
11// if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
12//
13// Contact information: Laurent Itti - 3641 Watt Way, HNB-07A - Los Angeles, CA 90089-2520 - USA.
14// Tel: +1 213 740 3527 - itti@pollux.usc.edu - http://iLab.usc.edu - http://jevois.org
15// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
16/*! \file */
17
18#pragma once
19
20#include <future>
21
22namespace jevois
23{
24 //! Simple watchdog class
25 /*! This class will kill the current process if reset() is not called at least every timeout seconds. If timeout <=
26 0.0 then the watchdog is inactive (will never time out and kill the process). Note that to be as lightweight as
27 possible, this class runs a background thread with a loop that iterates every timeout seconds, so the exact kill
28 time is approximate. \ingroup debugging */
30 {
31 public:
32 //! Constructor
33 Watchdog(double timeout);
34
35 //! Virtual destructor for safe inheritance
36 ~Watchdog();
37
38 //! Reset our internal timer. If this does not happen at least every timeout seconds, process is killed
39 void reset();
40
41 protected:
42 void run(double timeout);
43 std::future<void> itsRunFut;
44 std::atomic<bool> itsReset = true;
45 std::atomic<bool> itsRunning = false;
46 };
47}
Simple watchdog class.
Definition Watchdog.H:30
std::atomic< bool > itsReset
Definition Watchdog.H:44
void run(double timeout)
Definition Watchdog.C:51
std::atomic< bool > itsRunning
Definition Watchdog.H:45
~Watchdog()
Virtual destructor for safe inheritance.
Definition Watchdog.C:37
std::future< void > itsRunFut
Definition Watchdog.H:43
void reset()
Reset our internal timer. If this does not happen at least every timeout seconds, process is killed.
Definition Watchdog.C:47
Main namespace for all JeVois classes and functions.
Definition Concepts.dox:2