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Diffstat (limited to 'tdecore/tdeprocctrl.h')
-rw-r--r-- | tdecore/tdeprocctrl.h | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/tdecore/tdeprocctrl.h b/tdecore/tdeprocctrl.h new file mode 100644 index 000000000..fa9a8b3b4 --- /dev/null +++ b/tdecore/tdeprocctrl.h @@ -0,0 +1,150 @@ +/* This file is part of the KDE libraries + Copyright (C) 1997 Christian Czezakte (e9025461@student.tuwien.ac.at) + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public License + along with this library; see the file COPYING.LIB. If not, write to + the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + Boston, MA 02110-1301, USA. +*/ + +#ifndef __TDEPROCCTRL_H__ +#define __TDEPROCCTRL_H__ + +#include <tqvaluelist.h> + +#include "tdeprocess.h" + +class TQSocketNotifier; + +/** + * @short Used internally by TDEProcess + * @internal + * @author Christian Czezatke <e9025461@student.tuwien.ac.at> + * + * A class for internal use by TDEProcess only. -- Exactly one instance + * of this class is created by TDEApplication. + * + * This class takes care of the actual (UN*X) signal handling. + */ +class TDECORE_EXPORT TDEProcessController : public TQObject +{ + TQ_OBJECT + +public: + /** + * Create an instance if none exists yet. + * Called by TDEApplication::TDEApplication() + */ + static void ref(); + + /** + * Destroy the instance if one exists and it is not referenced any more. + * Called by TDEApplication::~TDEApplication() + */ + static void deref(); + + /** + * Only a single instance of this class is allowed at a time, + * and this static variable is used to track the one instance. + */ + static TDEProcessController *theTDEProcessController; // kde4: rename: instance + + /** + * Automatically called upon SIGCHLD. Never call it directly. + * If your application (or some library it uses) redirects SIGCHLD, + * the new signal handler (and only it) should call the old handler + * returned by sigaction(). + * @internal + */ + static void theSigCHLDHandler(int signal); // KDE4: private + + /** + * Wait for any process to exit and handle their exit without + * starting an event loop. + * This function may cause TDEProcess to emit any of its signals. + * + * @param timeout the timeout in seconds. -1 means no timeout. + * @return true if a process exited, false + * if no process exited within @p timeout seconds. + * @since 3.1 + */ + bool waitForProcessExit(int timeout); + + /** + * Call this function to defer processing of the data that became available + * on notifierFd(). + * @since 3.2 + */ + void unscheduleCheck(); + + /** + * This function @em must be called at some point after calling + * unscheduleCheck(). + * @since 3.2 + */ + void rescheduleCheck(); + + /* + * Obtain the file descriptor TDEProcessController uses to get notified + * about process exits. select() or poll() on it if you create a custom + * event loop that needs to act upon SIGCHLD. + * @return the file descriptor of the reading end of the notification pipe + * @since 3.2 + */ + int notifierFd() const; + + /** + * @internal + */ + void addTDEProcess( TDEProcess* ); + /** + * @internal + */ + void removeTDEProcess( TDEProcess* ); + /** + * @internal + */ + void addProcess( int pid ); + +private slots: + void slotDoHousekeeping(); + +private: + friend class I_just_love_gcc; + + int fd[2]; + bool needcheck; + TQSocketNotifier *notifier; + TQValueList<TDEProcess*> kProcessList; + TQValueList<int> unixProcessList; + + static void setupHandlers(); + static void resetHandlers(); + static struct sigaction oldChildHandlerData; + static bool handlerSet; + + static int refCount; + + // Disallow instantiation + TDEProcessController(); + ~TDEProcessController(); + + // Disallow assignment and copy-construction + TDEProcessController( const TDEProcessController& ); + TDEProcessController& operator= ( const TDEProcessController& ); +}; + + + +#endif + |