/**************************************************************************** ** ** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). ** All rights reserved. ** Contact: Nokia Corporation (qt-info@nokia.com) ** ** This file is part of a Qt Solutions component. ** ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Solutions Commercial License Agreement provided ** with the Software or, alternatively, in accordance with the terms ** contained in a written agreement between you and Nokia. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, Nokia gives you certain ** additional rights. These rights are described in the Nokia Qt LGPL ** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this ** package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** Please note Third Party Software included with Qt Solutions may impose ** additional restrictions and it is the user's responsibility to ensure ** that they have met the licensing requirements of the GPL, LGPL, or Qt ** Solutions Commercial license and the relevant license of the Third ** Party Software they are using. ** ** If you are unsure which license is appropriate for your use, please ** contact Nokia at qt-info@nokia.com. ** ****************************************************************************/ #include <stdio.h> #include <QtCore/QTextStream> #include <qtlockedfile.h> int main() { QTextStream qout(stdout); QTextStream qin(stdin); qout << "---===>>>> File locking example <<<<===---\n"; QtLockedFile lf("foo"); lf.open(QFile::ReadWrite); QString line; bool blocking = true; while (line != "q") { int m = lf.lockMode(); if (m == 0) qout << "\n[*] You have no locks."; else if (m == QFile::ReadOnly) qout << "\n[*] You have a read lock."; else qout << "\n[*] You have a read/write lock."; qout << " Blocking wait is "; if (blocking) qout << "ON.\n"; else qout << "OFF.\n"; qout << "Acquire [r]ead lock, read/[w]rite lock, re[l]ease lock, [t]oggle or [q]uit? "; qout.flush(); line = qin.readLine(); if (line.isNull()) break; if (line == "r") { qout << "Acquiring a read lock... "; qout.flush(); if (lf.lock(QtLockedFile::ReadLock, blocking)) qout << "done!\n"; else qout << "not currently possible!\n"; } else if (line == "w") { qout << "Acquiring a read/write lock... "; qout.flush(); if (lf.lock(QtLockedFile::WriteLock, blocking)) qout << "done!\n"; else qout << "not currently possible!\n"; } else if (line == "l") { qout << "Releasing lock... "; qout.flush(); lf.unlock(); qout << "done!\n"; } else if (line == "t") { blocking = !blocking; } qout.flush(); } }