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39
40#ifndef QLOCKFILE_H
41#define QLOCKFILE_H
42
43#include <QtCore/qstring.h>
44#include <QtCore/qscopedpointer.h>
45
46QT_BEGIN_NAMESPACE
47
48class QLockFilePrivate;
49
50class Q_CORE_EXPORT QLockFile
51{
52public:
53 QLockFile(const QString &fileName);
54 ~QLockFile();
55
56 bool lock();
57 bool tryLock(int timeout = 0);
58 void unlock();
59
60 void setStaleLockTime(int);
61 int staleLockTime() const;
62
63 bool isLocked() const;
64 bool getLockInfo(qint64 *pid, QString *hostname, QString *appname) const;
65 bool removeStaleLockFile();
66
67 enum LockError {
68 NoError = 0,
69 LockFailedError = 1,
70 PermissionError = 2,
71 UnknownError = 3
72 };
73 LockError error() const;
74
75protected:
76 QScopedPointer<QLockFilePrivate> d_ptr;
77
78private:
79 Q_DECLARE_PRIVATE(QLockFile)
80 Q_DISABLE_COPY(QLockFile)
81};
82
83QT_END_NAMESPACE
84
85#endif // QLOCKFILE_H
86

source code of qtbase/src/corelib/io/qlockfile.h