diff options
Diffstat (limited to 'qtermwidget/k3processcontroller.h')
-rw-r--r-- | qtermwidget/k3processcontroller.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/qtermwidget/k3processcontroller.h b/qtermwidget/k3processcontroller.h new file mode 100644 index 0000000..c077af2 --- /dev/null +++ b/qtermwidget/k3processcontroller.h @@ -0,0 +1,137 @@ +/* This file is part of the KDE libraries + Copyright (C) 1997 Christian Czezakte (e9025461@student.tuwien.ac.at) + + Rewritten for QT4 by e_k <e_k at users.sourceforge.net>, Copyright (C)2008 + + 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 K3PROCCTRL_H +#define K3PROCCTRL_H + +#include <QtCore/QList> +#include <k3process.h> + + +/** + * @short Used internally by K3Process + * @internal + * @author Christian Czezatke <e9025461@student.tuwien.ac.at> + * + * A class for internal use by K3Process only. -- Exactly one instance + * of this class is created by KApplication. + * + * This class takes care of the actual (UN*X) signal handling. + */ +class K3ProcessController : 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. + * This method provides access to that instance. + */ + static K3ProcessController *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 K3Process 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. + */ + bool waitForProcessExit(int timeout); + + /** + * Call this function to defer processing of the data that became available + * on notifierFd(). + */ + void unscheduleCheck(); + + /** + * This function @em must be called at some point after calling + * unscheduleCheck(). + */ + void rescheduleCheck(); + + /* + * Obtain the file descriptor K3ProcessController 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 + */ + int notifierFd() const; + + /** + * @internal + */ + void addKProcess( K3Process* ); + /** + * @internal + */ + void removeKProcess( K3Process* ); + /** + * @internal + */ + void addProcess( int pid ); + +private Q_SLOTS: + void slotDoHousekeeping(); + +private: + friend class I_just_love_gcc; + + static void setupHandlers(); + static void resetHandlers(); + + // Disallow instantiation + K3ProcessController(); + ~K3ProcessController(); + + // Disallow assignment and copy-construction + K3ProcessController( const K3ProcessController& ); + K3ProcessController& operator= ( const K3ProcessController& ); + + class Private; + Private * const d; +}; + +#endif + |