"Fossies" - the Fresh Open Source Software Archive

Member "cb2bib-2.0.1/src/qtsingleapplication/src/qtlockedfile.h" (12 Feb 2021, 3280 Bytes) of package /linux/privat/cb2bib-2.0.1.tar.gz:

As a special service "Fossies" has tried to format the requested source page into HTML format using (guessed) C and C++ source code syntax highlighting (style: standard) with prefixed line numbers and code folding option. Alternatively you can here view or download the uninterpreted source code file. For more information about "qtlockedfile.h" see the Fossies "Dox" file reference documentation and the last Fossies "Diffs" side-by-side code changes report: 1.9.9_vs_2.0.0.

    1 /****************************************************************************
    2 **
    3 ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    4 ** Contact: http://www.qt-project.org/legal
    5 **
    6 ** This file is part of the Qt Solutions component.
    7 **
    8 ** $QT_BEGIN_LICENSE:BSD$
    9 ** You may use this file under the terms of the BSD license as follows:
   10 **
   11 ** "Redistribution and use in source and binary forms, with or without
   12 ** modification, are permitted provided that the following conditions are
   13 ** met:
   14 **   * Redistributions of source code must retain the above copyright
   15 **     notice, this list of conditions and the following disclaimer.
   16 **   * Redistributions in binary form must reproduce the above copyright
   17 **     notice, this list of conditions and the following disclaimer in
   18 **     the documentation and/or other materials provided with the
   19 **     distribution.
   20 **   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
   21 **     of its contributors may be used to endorse or promote products derived
   22 **     from this software without specific prior written permission.
   23 **
   24 **
   25 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   26 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   27 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   28 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   29 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   30 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   31 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   32 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   33 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   34 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   35 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
   36 **
   37 ** $QT_END_LICENSE$
   38 **
   39 ****************************************************************************/
   40 
   41 #ifndef QTLOCKEDFILE_H
   42 #define QTLOCKEDFILE_H
   43 
   44 #include <QFile>
   45 #ifdef Q_OS_WIN
   46 #include <QVector>
   47 #endif
   48 
   49 #if defined(Q_OS_WIN)
   50 #  if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT)
   51 #    define QT_QTLOCKEDFILE_EXPORT
   52 #  elif defined(QT_QTLOCKEDFILE_IMPORT)
   53 #    if defined(QT_QTLOCKEDFILE_EXPORT)
   54 #      undef QT_QTLOCKEDFILE_EXPORT
   55 #    endif
   56 #    define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport)
   57 #  elif defined(QT_QTLOCKEDFILE_EXPORT)
   58 #    undef QT_QTLOCKEDFILE_EXPORT
   59 #    define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport)
   60 #  endif
   61 #else
   62 #  define QT_QTLOCKEDFILE_EXPORT
   63 #endif
   64 
   65 namespace QtLP_Private
   66 {
   67 
   68 class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
   69 {
   70 public:
   71     enum LockMode { NoLock = 0, ReadLock, WriteLock };
   72 
   73     QtLockedFile();
   74     explicit QtLockedFile(const QString& name);
   75     ~QtLockedFile();
   76 
   77     bool open(OpenMode mode);
   78 
   79     bool lock(LockMode mode, bool block = true);
   80     bool unlock();
   81     bool isLocked() const;
   82     LockMode lockMode() const;
   83 
   84 private:
   85 #ifdef Q_OS_WIN
   86     Qt::HANDLE wmutex;
   87     Qt::HANDLE rmutex;
   88     QVector<Qt::HANDLE> rmutexes;
   89     QString mutexname;
   90 
   91     Qt::HANDLE getMutexHandle(int idx, bool doCreate);
   92     bool waitMutex(Qt::HANDLE mutex, bool doBlock);
   93 
   94 #endif
   95     LockMode m_lock_mode;
   96 };
   97 }
   98 #endif