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39
40#ifndef QELAPSEDTIMER_H
41#define QELAPSEDTIMER_H
42
43#include <QtCore/qglobal.h>
44
45QT_BEGIN_NAMESPACE
46
47
48class Q_CORE_EXPORT QElapsedTimer
49{
50public:
51 enum ClockType {
52 SystemTime,
53 MonotonicClock,
54 TickCounter,
55 MachAbsoluteTime,
56 PerformanceCounter
57 };
58
59 Q_DECL_CONSTEXPR QElapsedTimer()
60 : t1(Q_INT64_C(0x8000000000000000)),
61 t2(Q_INT64_C(0x8000000000000000))
62 {
63 }
64
65 static ClockType clockType() Q_DECL_NOTHROW;
66 static bool isMonotonic() Q_DECL_NOTHROW;
67
68 void start() Q_DECL_NOTHROW;
69 qint64 restart() Q_DECL_NOTHROW;
70 void invalidate() Q_DECL_NOTHROW;
71 bool isValid() const Q_DECL_NOTHROW;
72
73 qint64 nsecsElapsed() const Q_DECL_NOTHROW;
74 qint64 elapsed() const Q_DECL_NOTHROW;
75 bool hasExpired(qint64 timeout) const Q_DECL_NOTHROW;
76
77 qint64 msecsSinceReference() const Q_DECL_NOTHROW;
78 qint64 msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW;
79 qint64 secsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW;
80
81 bool operator==(const QElapsedTimer &other) const Q_DECL_NOTHROW
82 { return t1 == other.t1 && t2 == other.t2; }
83 bool operator!=(const QElapsedTimer &other) const Q_DECL_NOTHROW
84 { return !(*this == other); }
85
86 friend bool Q_CORE_EXPORT operator<(const QElapsedTimer &v1, const QElapsedTimer &v2) Q_DECL_NOTHROW;
87
88private:
89 qint64 t1;
90 qint64 t2;
91};
92
93QT_END_NAMESPACE
94
95#endif // QELAPSEDTIMER_H
96