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+/* 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 __KPROCCTRL_H__
+#define __KPROCCTRL_H__
+
+#include <qvaluelist.h>
+
+#include "kprocess.h"
+
+class QSocketNotifier;
+
+/**
+ * @short Used internally by KProcess
+ * @internal
+ * @author Christian Czezatke <e9025461@student.tuwien.ac.at>
+ *
+ * A class for internal use by KProcess only. -- Exactly one instance
+ * of this class is created by KApplication.
+ *
+ * This class takes care of the actual (UN*X) signal handling.
+ */
+class KDECORE_EXPORT KProcessController : public QObject
+{
+ Q_OBJECT
+
+public:
+ /**
+ * Create an instance if none exists yet.
+ * Called by KApplication::KApplication()
+ */
+ static void ref();
+
+ /**
+ * Destroy the instance if one exists and it is not referenced any more.
+ * Called by KApplication::~KApplication()
+ */
+ 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 KProcessController *theKProcessController; // 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 KProcess 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 KProcessController 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 addKProcess( KProcess* );
+ /**
+ * @internal
+ */
+ void removeKProcess( KProcess* );
+ /**
+ * @internal
+ */
+ void addProcess( int pid );
+
+private slots:
+ void slotDoHousekeeping();
+
+private:
+ friend class I_just_love_gcc;
+
+ int fd[2];
+ bool needcheck;
+ QSocketNotifier *notifier;
+ QValueList<KProcess*> kProcessList;
+ QValueList<int> unixProcessList;
+
+ static void setupHandlers();
+ static void resetHandlers();
+ static struct sigaction oldChildHandlerData;
+ static bool handlerSet;
+
+ static int refCount;
+
+ // Disallow instantiation
+ KProcessController();
+ ~KProcessController();
+
+ // Disallow assignment and copy-construction
+ KProcessController( const KProcessController& );
+ KProcessController& operator= ( const KProcessController& );
+};
+
+
+
+#endif
+