ESPResSo
Extensible Simulation Package for Research on Soft Matter Systems
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signalhandling.hpp
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1/*
2 * Copyright (C) 2010-2022 The ESPResSo project
3 * Copyright (C) 2002,2003,2004,2005,2006,2007,2008,2009,2010
4 * Max-Planck-Institute for Polymer Research, Theory Group
5 *
6 * This file is part of ESPResSo.
7 *
8 * ESPResSo is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * ESPResSo is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21#ifndef SIGNAL_HANDLER_HPP
22#define SIGNAL_HANDLER_HPP
23
24#include "errorhandling.hpp"
25
26#include <csignal>
27
28/** @brief RAII guard for signal handling
29 *
30 * This object saves the current signal handler for @p signal,
31 * replaces it with a custom handler @p handler and restores it on
32 * destruction.
33 */
35 struct sigaction old_action;
36
37public:
38 // Delete all copy and move constructors
41 SignalHandler(SignalHandler const &) = delete;
43
44 /** @brief Constructor
45 *
46 * @param[in] signal Number of signal to replace
47 * @param[in] handler Function to handle the signal
48 */
49 SignalHandler(int signal, void (*handler)(int)) {
50 struct sigaction new_action;
51 new_action.sa_handler = handler;
52 sigemptyset(&new_action.sa_mask);
53 new_action.sa_flags = 0;
54
55 if (sigaction(SIGINT, &new_action, &old_action) < 0) {
56 runtimeErrorMsg() << "Failed to replace signal handler!";
57 }
58 }
59
60 /** @brief Destructor
61 *
62 * Restores the handler which was active at the time of
63 * construction.
64 */
66 if (sigaction(SIGINT, &old_action, nullptr) < 0) {
67 runtimeErrorMsg() << "Failed to restore signal handler!";
68 }
69 }
70};
71
72#endif // SIGNAL_HANDLER_HPP
RAII guard for signal handling.
SignalHandler & operator=(SignalHandler &&)=delete
SignalHandler(SignalHandler const &)=delete
SignalHandler(int signal, void(*handler)(int))
Constructor.
SignalHandler & operator=(SignalHandler const &)=delete
~SignalHandler()
Destructor.
SignalHandler(SignalHandler &&)=delete
This file contains the errorhandling code for severe errors, like a broken bond or illegal parameter ...
#define runtimeErrorMsg()