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151 lines
4.0 KiB
151 lines
4.0 KiB
/* 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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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 __KPROCCTRL_H__
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#define __KPROCCTRL_H__
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#include <tqvaluelist.h>
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#include "kprocess.h"
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class TQSocketNotifier;
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/**
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* @short Used internally by TDEProcess
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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 TDEProcess only. -- Exactly one instance
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* of this class is created by TDEApplication.
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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 TDECORE_EXPORT TDEProcessController : public TQObject
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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 TDEApplication::TDEApplication()
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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 TDEApplication::~TDEApplication()
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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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* and this static variable is used to track the one instance.
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*/
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static TDEProcessController *theTDEProcessController; // kde4: rename: 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 TDEProcess 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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* @since 3.1
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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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* @since 3.2
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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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* @since 3.2
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*/
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void rescheduleCheck();
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/*
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* Obtain the file descriptor TDEProcessController 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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* @since 3.2
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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 addTDEProcess( TDEProcess* );
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/**
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* @internal
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*/
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void removeTDEProcess( TDEProcess* );
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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 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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int fd[2];
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bool needcheck;
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TQSocketNotifier *notifier;
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TQValueList<TDEProcess*> kProcessList;
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TQValueList<int> unixProcessList;
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static void setupHandlers();
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static void resetHandlers();
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static struct sigaction oldChildHandlerData;
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static bool handlerSet;
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static int refCount;
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// Disallow instantiation
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TDEProcessController();
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~TDEProcessController();
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// Disallow assignment and copy-construction
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TDEProcessController( const TDEProcessController& );
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TDEProcessController& operator= ( const TDEProcessController& );
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};
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#endif
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