138 lines
3.7 KiB
C++
138 lines
3.7 KiB
C++
/* This file is part of the KDE libraries
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Copyright (C) 1997 Christian Czezakte (e9025461@student.tuwien.ac.at)
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Rewritten for QT4 by e_k <e_k at users.sourceforge.net>, Copyright (C)2008
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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*/
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#ifndef K3PROCCTRL_H
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#define K3PROCCTRL_H
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#include <QtCore/QList>
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#include <k3process.h>
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/**
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* @short Used internally by K3Process
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* @internal
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* @author Christian Czezatke <e9025461@student.tuwien.ac.at>
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*
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* A class for internal use by K3Process only. -- Exactly one instance
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* of this class is created by KApplication.
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*
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* This class takes care of the actual (UN*X) signal handling.
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*/
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class K3ProcessController : public QObject
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{
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Q_OBJECT
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public:
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/**
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* Create an instance if none exists yet.
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* Called by KApplication::KApplication()
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*/
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static void ref();
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/**
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* Destroy the instance if one exists and it is not referenced any more.
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* Called by KApplication::~KApplication()
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*/
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static void deref();
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/**
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* Only a single instance of this class is allowed at a time.
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* This method provides access to that instance.
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*/
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static K3ProcessController *instance();
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/**
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* Automatically called upon SIGCHLD. Never call it directly.
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* If your application (or some library it uses) redirects SIGCHLD,
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* the new signal handler (and only it) should call the old handler
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* returned by sigaction().
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* @internal
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*/
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static void theSigCHLDHandler(int signal); // KDE4: private
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/**
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* Wait for any process to exit and handle their exit without
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* starting an event loop.
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* This function may cause K3Process to emit any of its signals.
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*
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* @param timeout the timeout in seconds. -1 means no timeout.
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* @return true if a process exited, false
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* if no process exited within @p timeout seconds.
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*/
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bool waitForProcessExit(int timeout);
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/**
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* Call this function to defer processing of the data that became available
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* on notifierFd().
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*/
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void unscheduleCheck();
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/**
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* This function @em must be called at some point after calling
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* unscheduleCheck().
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*/
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void rescheduleCheck();
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/*
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* Obtain the file descriptor K3ProcessController uses to get notified
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* about process exits. select() or poll() on it if you create a custom
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* event loop that needs to act upon SIGCHLD.
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* @return the file descriptor of the reading end of the notification pipe
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*/
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int notifierFd() const;
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/**
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* @internal
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*/
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void addKProcess( K3Process* );
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/**
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* @internal
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*/
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void removeKProcess( K3Process* );
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/**
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* @internal
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*/
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void addProcess( int pid );
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private Q_SLOTS:
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void slotDoHousekeeping();
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private:
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friend class I_just_love_gcc;
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static void setupHandlers();
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static void resetHandlers();
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// Disallow instantiation
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K3ProcessController();
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~K3ProcessController();
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// Disallow assignment and copy-construction
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K3ProcessController( const K3ProcessController& );
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K3ProcessController& operator= ( const K3ProcessController& );
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class Private;
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Private * const d;
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};
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#endif
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