Qt 4.8
qlock_p.h
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41 
42 #ifndef QLOCK_P_H
43 #define QLOCK_P_H
44 
45 //
46 // W A R N I N G
47 // -------------
48 //
49 // This file is not part of the Qt API. This header file may
50 // change from version to version without notice, or even be
51 // removed.
52 //
53 // We mean it.
54 //
55 
56 #include "QtCore/qstring.h"
57 
59 
60 class QLockData;
61 
63 {
64 public:
65  QLock(const QString &filename, char id, bool create = false);
66  ~QLock();
67 
68  enum Type { Read, Write };
69 
70  bool isValid() const;
71  void lock(Type type);
72  void unlock();
73  bool locked() const;
74 
75 private:
78 };
79 
80 
81 // Nice class for ensuring the lock is released.
82 // Just create one on the stack and the lock is automatically released
83 // when QLockHandle is destructed.
85 {
86 public:
87  QLockHandle(QLock *l, QLock::Type type) : qlock(l) { qlock->lock(type); }
88  ~QLockHandle() { if (locked()) qlock->unlock(); }
89 
90  void lock(QLock::Type type) { qlock->lock(type); }
91  void unlock() { qlock->unlock(); }
92  bool locked() const { return qlock->locked(); }
93 
94 private:
96 };
97 
99 
100 #endif // QLOCK_P_H
bool locked() const
Definition: qlock_p.h:92
int type
Definition: qmetatype.cpp:239
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
void unlock()
Definition: qlock_p.h:91
#define Q_GUI_EXPORT
Definition: qglobal.h:1450
static Expression::Ptr create(Expression *const expr, const YYLTYPE &sourceLocator, const ParserContext *const parseInfo)
QLockData * data
Definition: qlock_p.h:77
The QString class provides a Unicode character string.
Definition: qstring.h:83
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
QLockHandle(QLock *l, QLock::Type type)
Definition: qlock_p.h:87
QLock * qlock
Definition: qlock_p.h:95
The QLock class is a wrapper for a system shared semaphore.
Definition: qlock_p.h:62
Type
Definition: qlock_p.h:68
~QLockHandle()
Definition: qlock_p.h:88
void lock(QLock::Type type)
Definition: qlock_p.h:90
static QReadWriteLock lock
Definition: proxyconf.cpp:399
QFactoryLoader * l
Type type
Definition: qlock_p.h:76