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41
42#ifndef QTIMESTAMP_H
43#define QTIMESTAMP_H
44
45#include <QtCore/qglobal.h>
46
47QT_BEGIN_HEADER
48
49QT_BEGIN_NAMESPACE
50
51QT_MODULE(Core)
52
53class Q_CORE_EXPORT QElapsedTimer
54{
55public:
56 enum ClockType {
57 SystemTime,
58 MonotonicClock,
59 TickCounter,
60 MachAbsoluteTime,
61 PerformanceCounter
62 };
63 static ClockType clockType();
64 static bool isMonotonic();
65
66 void start();
67 qint64 restart();
68 void invalidate();
69 bool isValid() const;
70
71 qint64 nsecsElapsed() const;
72 qint64 elapsed() const;
73 bool hasExpired(qint64 timeout) const;
74
75 qint64 msecsSinceReference() const;
76 qint64 msecsTo(const QElapsedTimer &other) const;
77 qint64 secsTo(const QElapsedTimer &other) const;
78
79 bool operator==(const QElapsedTimer &other) const
80 { return t1 == other.t1 && t2 == other.t2; }
81 bool operator!=(const QElapsedTimer &other) const
82 { return !(*this == other); }
83
84 friend bool Q_CORE_EXPORT operator<(const QElapsedTimer &v1, const QElapsedTimer &v2);
85
86private:
87 qint64 t1;
88 qint64 t2;
89};
90
91QT_END_NAMESPACE
92
93QT_END_HEADER
94
95#endif // QTIMESTAMP_H
96