AirTV-Qt/qtsingleapplication/src/qtlockedfile.h

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  39
  40 #ifndef QTLOCKEDFILE_H
  41 #define QTLOCKEDFILE_H
  42
  43 #include <QtCore/QFile>
  44 #ifdef Q_OS_WIN
  45 #include <QtCore/QVector>
  46 #endif
  47
  48 #if defined(Q_WS_WIN)
  49 #  if !defined(QT_QTLOCKEDFILE_EXPORT) && !defined(QT_QTLOCKEDFILE_IMPORT)
  50 #    define QT_QTLOCKEDFILE_EXPORT
  51 #  elif defined(QT_QTLOCKEDFILE_IMPORT)
  52 #    if defined(QT_QTLOCKEDFILE_EXPORT)
  53 #      undef QT_QTLOCKEDFILE_EXPORT
  54 #    endif
  55 #    define QT_QTLOCKEDFILE_EXPORT __declspec(dllimport)
  56 #  elif defined(QT_QTLOCKEDFILE_EXPORT)
  57 #    undef QT_QTLOCKEDFILE_EXPORT
  58 #    define QT_QTLOCKEDFILE_EXPORT __declspec(dllexport)
  59 #  endif
  60 #else
  61 #  define QT_QTLOCKEDFILE_EXPORT
  62 #endif
  63
  64 namespace QtLP_Private {
  65
  66 class QT_QTLOCKEDFILE_EXPORT QtLockedFile : public QFile
  67 {
  68 public:
  69     enum LockMode { NoLock = 0, ReadLock, WriteLock };
  70
  71     QtLockedFile();
  72     QtLockedFile(const QString &name);
  73     ~QtLockedFile();
  74
  75     bool open(OpenMode mode);
  76
  77     bool lock(LockMode mode, bool block = true);
  78     bool unlock();
  79     bool isLocked() const;
  80     LockMode lockMode() const;
  81
  82 private:
  83 #ifdef Q_OS_WIN
  84     Qt::HANDLE wmutex;
  85     Qt::HANDLE rmutex;
  86     QVector<Qt::HANDLE> rmutexes;
  87     QString mutexname;
  88
  89     Qt::HANDLE getMutexHandle(int idx, bool doCreate);
  90     bool waitMutex(Qt::HANDLE mutex, bool doBlock);
  91
  92 #endif
  93     LockMode m_lock_mode;
  94 };
  95 }
  96 #endif