177 lines
5 KiB
C++
Executable file
177 lines
5 KiB
C++
Executable file
/******************************************************************************\
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* Copyright (c) 2020
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*
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* Author(s):
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* Peter L Jones
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*
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******************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*
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******************************************************************************
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*
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* This code contains some ideas derived from QCtrlSignals
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* https://github.com/Skycoder42/QCtrlSignals.git
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* - mostly the singleton and emitSignal code, plus some of the structure
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* - virtually everything else is common knowledge across SourceForge answers
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*
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* BSD 3-Clause License
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*
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* Copyright (c) 2016, Felix Barz
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* * Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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\******************************************************************************/
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#pragma once
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#include <QtCore/QObject>
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#include <QtCore/QScopedPointer>
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#include <QtCore/QHash>
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#include <QtCore/QReadWriteLock>
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#include <QtCore/QSet>
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#include <QGlobalStatic>
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#ifdef _WIN32
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#include <qt_windows.h>
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#include <QtCore/QCoreApplication>
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#include <QtCore/QSemaphore>
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#include <QtCore/QThread>
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#include <QtCore/QDebug>
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#else
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#include <QSocketNotifier>
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#include <QObject>
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#include <QCoreApplication>
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#include <csignal>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#endif
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class CSignalBase;
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class CSignalHandler : public QObject
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{
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Q_OBJECT
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friend class CSignalBase;
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friend class CSignalHandlerSingleton;
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public:
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static CSignalHandler* getSingletonP();
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bool emitSignal ( int );
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#ifndef _WIN32
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public slots:
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void OnSocketNotify ( int socket );
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#endif
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signals:
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void HandledSignal ( int sigNum );
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private:
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QScopedPointer<CSignalBase> pSignalBase;
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explicit CSignalHandler();
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~CSignalHandler() override;
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};
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// ----------------------------------------------------------
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class CSignalBase
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{
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Q_DISABLE_COPY ( CSignalBase )
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public:
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static CSignalBase* withSignalHandler ( CSignalHandler* );
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virtual ~CSignalBase();
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virtual QReadWriteLock* getLock() const = 0;
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QSet<int> sHandledSigNums;
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protected:
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CSignalBase ( CSignalHandler* );
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CSignalHandler* pSignalHandler;
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template <typename T>
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static T *getSelf()
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{
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return static_cast<T*>( CSignalHandler::getSingletonP()->pSignalBase.data() );
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}
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};
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#ifdef _WIN32
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class CSignalWin : public CSignalBase
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{
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public:
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CSignalWin ( CSignalHandler* );
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~CSignalWin() override;
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virtual QReadWriteLock* getLock() const override;
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private:
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mutable QReadWriteLock lock;
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static BOOL WINAPI signalHandler ( _In_ DWORD );
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};
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#else
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class CSignalUnix : public CSignalBase
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{
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public:
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CSignalUnix ( CSignalHandler* );
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~CSignalUnix() override;
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virtual QReadWriteLock* getLock() const override;
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private:
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QSocketNotifier* socketNotifier = nullptr;
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bool setSignalHandled ( int sigNum, bool state );
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static int socketPair[2];
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static void signalHandler ( int sigNum );
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};
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#endif
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