diff options
| author | Jonathan Liu <net147@gmail.com> | 2014-11-04 20:59:14 +1100 |
|---|---|---|
| committer | Jonathan Liu <net147@gmail.com> | 2014-11-04 22:50:45 +0100 |
| commit | 51ddaabb81ae55d13aaabfdf45ee7db4d7c9bba2 (patch) | |
| tree | eb32eae7de6cdd0318ded97218f4a5cc641f1a9e /src/corelib/tools | |
| parent | c36b559196727e2477c6007b063d861aea5ea703 (diff) | |
QElapsedTimer/Unix: Improve accuracy for millisecond values
Task-number: QTBUG-42365
Change-Id: Iee390bc0014e32b3bc5ef144ea9e1c677ab66278
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/tools')
| -rw-r--r-- | src/corelib/tools/qelapsedtimer_unix.cpp | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/src/corelib/tools/qelapsedtimer_unix.cpp b/src/corelib/tools/qelapsedtimer_unix.cpp index 5b26d551a7..02d60cc60c 100644 --- a/src/corelib/tools/qelapsedtimer_unix.cpp +++ b/src/corelib/tools/qelapsedtimer_unix.cpp @@ -140,11 +140,6 @@ static int unixCheckClockType() #endif } -static inline qint64 fractionAdjustment() -{ - return 1000*1000ull; -} - bool QElapsedTimer::isMonotonic() Q_DECL_NOTHROW { return clockType() == MonotonicClock; @@ -196,7 +191,7 @@ static qint64 elapsedAndRestart(qint64 sec, qint64 frac, do_gettime(nowsec, nowfrac); sec = *nowsec - sec; frac = *nowfrac - frac; - return sec * Q_INT64_C(1000) + frac / fractionAdjustment(); + return (sec * Q_INT64_C(1000000000) + frac) / Q_INT64_C(1000000); } void QElapsedTimer::start() Q_DECL_NOTHROW @@ -220,20 +215,19 @@ qint64 QElapsedTimer::nsecsElapsed() const Q_DECL_NOTHROW qint64 QElapsedTimer::elapsed() const Q_DECL_NOTHROW { - qint64 sec, frac; - return elapsedAndRestart(t1, t2, &sec, &frac); + return nsecsElapsed() / Q_INT64_C(1000000); } qint64 QElapsedTimer::msecsSinceReference() const Q_DECL_NOTHROW { - return t1 * Q_INT64_C(1000) + t2 / fractionAdjustment(); + return t1 * Q_INT64_C(1000) + t2 / Q_INT64_C(1000000); } qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW { qint64 secs = other.t1 - t1; qint64 fraction = other.t2 - t2; - return secs * Q_INT64_C(1000) + fraction / fractionAdjustment(); + return (secs * Q_INT64_C(1000000000) + fraction) / Q_INT64_C(1000000); } qint64 QElapsedTimer::secsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW |