Qt 4.8
qelapsedtimer.h
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41 
42 #ifndef QTIMESTAMP_H
43 #define QTIMESTAMP_H
44 
45 #include <QtCore/qglobal.h>
46 
48 
50 
51 QT_MODULE(Core)
52 
54 {
55 public:
56  enum ClockType {
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 
86 private:
89 };
90 
92 
94 
95 #endif // QTIMESTAMP_H
static double elapsed(qint64 after, qint64 before)
ClockType
This enum contains the different clock types that QElapsedTimer may use.
Definition: qelapsedtimer.h:56
#define QT_END_NAMESPACE
This macro expands to.
Definition: qglobal.h:90
#define QT_MODULE(x)
Definition: qglobal.h:2783
#define QT_BEGIN_HEADER
Definition: qglobal.h:136
bool operator<(const QByteArray &a1, const QByteArray &a2)
Returns true if byte array a1 is lexically less than byte array a2; otherwise returns false...
Definition: qbytearray.h:539
The QElapsedTimer class provides a fast way to calculate elapsed times.
Definition: qelapsedtimer.h:53
#define QT_BEGIN_NAMESPACE
This macro expands to.
Definition: qglobal.h:89
bool operator!=(const QElapsedTimer &other) const
Returns true if this object and other contain different times.
Definition: qelapsedtimer.h:81
__int64 qint64
Definition: qglobal.h:942
bool operator==(const QElapsedTimer &other) const
Returns true if this object and other contain the same time.
Definition: qelapsedtimer.h:79
#define Q_CORE_EXPORT
Definition: qglobal.h:1449
#define class
#define QT_END_HEADER
Definition: qglobal.h:137