diff options
Diffstat (limited to 'src/corelib/kernel/qelapsedtimer.h')
| -rw-r--r-- | src/corelib/kernel/qelapsedtimer.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/src/corelib/kernel/qelapsedtimer.h b/src/corelib/kernel/qelapsedtimer.h index a4db43304a..7d8b889f61 100644 --- a/src/corelib/kernel/qelapsedtimer.h +++ b/src/corelib/kernel/qelapsedtimer.h @@ -6,8 +6,9 @@ #include <QtCore/qglobal.h> -QT_BEGIN_NAMESPACE +#include <chrono> +QT_BEGIN_NAMESPACE class Q_CORE_EXPORT QElapsedTimer { @@ -21,11 +22,11 @@ public: PerformanceCounter }; - constexpr QElapsedTimer() - : t1(Q_INT64_C(0x8000000000000000)), - t2(Q_INT64_C(0x8000000000000000)) - { - } + // similar to std::chrono::*_clock + using Duration = std::chrono::nanoseconds; + using TimePoint = std::chrono::time_point<std::chrono::steady_clock, Duration>; + + constexpr QElapsedTimer() = default; static ClockType clockType() noexcept; static bool isMonotonic() noexcept; @@ -35,11 +36,13 @@ public: void invalidate() noexcept; bool isValid() const noexcept; + Duration durationElapsed() const noexcept; qint64 nsecsElapsed() const noexcept; qint64 elapsed() const noexcept; bool hasExpired(qint64 timeout) const noexcept; qint64 msecsSinceReference() const noexcept; + Duration durationTo(const QElapsedTimer &other) const noexcept; qint64 msecsTo(const QElapsedTimer &other) const noexcept; qint64 secsTo(const QElapsedTimer &other) const noexcept; @@ -51,8 +54,8 @@ public: friend bool Q_CORE_EXPORT operator<(const QElapsedTimer &lhs, const QElapsedTimer &rhs) noexcept; private: - qint64 t1; - qint64 t2; + qint64 t1 = Q_INT64_C(0x8000000000000000); + qint64 t2 = Q_INT64_C(0x8000000000000000); }; QT_END_NAMESPACE |