b74306acd5
There are a few things acceptable/safe in a signal handler, and taking locks is not one of them. This replaces the logic with a simple counter that serves the purpose just as well. If we get a double signal, we log and ignore. Change-Id: If589c18492468c120d00c213805467bcbba05d27 Reviewed-on: https://gerrit.libreoffice.org/83150 Reviewed-by: Ashod Nakashian <ashnakash@gmail.com> Tested-by: Ashod Nakashian <ashnakash@gmail.com>
85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef INCLUDED_SIGNALUTIL_HPP
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#define INCLUDED_SIGNALUTIL_HPP
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#include <atomic>
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#include <mutex>
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#if MOBILEAPP
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static constexpr bool ShutdownRequestFlag(false);
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extern std::atomic<bool> MobileTerminationFlag;
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#endif
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namespace SigUtil
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{
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/// Get the flag used to commence clean shutdown.
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/// requestShutdown() is used to set the flag.
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bool getShutdownRequestFlag();
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/// Get the flag to stop pump loops forcefully.
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bool getTerminationFlag();
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/// Set the flag to stop pump loops forcefully.
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void setTerminationFlag();
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#if MOBILEAPP
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/// Reset the flag to stop pump loops forcefully.
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/// Only necessary in Mobile.
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void resetTerminationFlag();
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#endif
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/// Get the flag to dump internal state.
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bool getDumpGlobalState();
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/// Reset the flag to dump internal state.
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void resetDumpGlobalState();
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#if !MOBILEAPP
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/// Wait for the signal handler, if any,
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/// and prevent _Exit while collecting backtrace.
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void waitSigHandlerTrap();
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/// Returns the name of the signal.
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const char* signalName(int signo);
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/// Register a wakeup function when changing
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/// Trap signals to cleanup and exit the process gracefully.
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void setTerminationSignals();
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/// Trap all fatal signals to assist debugging.
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void setFatalSignals();
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/// Trap generally useful signals
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void setUserSignals();
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/// Requests the server to initiate graceful shutdown.
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/// Shutting down is a multi-stage process, because
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/// it can be requested via signals.
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/// Since we need to notify clients, we can't
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/// invoke the sockets while in a signal handler.
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/// This flags the server to notify clients first
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/// then flags for shutdown.
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void requestShutdown();
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/// Kills a child process and returns true when
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/// child pid is removed from the process table
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/// after a certain (short) timeout.
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bool killChild(const int pid);
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/// Dump a signal-safe back-trace
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void dumpBacktrace();
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#endif // !MOBILEAPP
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} // end namespace SigUtil
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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