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author | Liang Qi <liang.qi@theqtcompany.com> | 2016-04-13 06:55:37 +0200 |
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committer | Liang Qi <liang.qi@theqtcompany.com> | 2016-04-13 06:55:37 +0200 |
commit | b94773c9c838a0b3db1bced0bc8daf5b04aefc29 (patch) | |
tree | 4afe809fa3ac8a83f5eaf98d0b40d4bbf7b5fca4 /src/corelib/tools/qelapsedtimer_generic.cpp | |
parent | c327fb79e1a50c825a945e97f2c66d07a1c6d225 (diff) | |
parent | 541c9d4d2acd045459c3e75eee80c63b36af9ed0 (diff) |
Merge remote-tracking branch 'origin/5.6' into 5.7
Conflicts:
config.tests/unix/compile.test
src/android/jar/src/org/qtproject/qt5/android/QtActivityDelegate.java
src/testlib/qtestcase.cpp
src/testlib/qtestcase.qdoc
Change-Id: Ied3c471dbc9a076c8de33d673bd557e88575609d
Diffstat (limited to 'src/corelib/tools/qelapsedtimer_generic.cpp')
-rw-r--r-- | src/corelib/tools/qelapsedtimer_generic.cpp | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/src/corelib/tools/qelapsedtimer_generic.cpp b/src/corelib/tools/qelapsedtimer_generic.cpp index e053d4ced4..8c724247be 100644 --- a/src/corelib/tools/qelapsedtimer_generic.cpp +++ b/src/corelib/tools/qelapsedtimer_generic.cpp @@ -85,7 +85,8 @@ void QElapsedTimer::start() Q_DECL_NOTHROW and then starting the timer again with start(), but it does so in one single operation, avoiding the need to obtain the clock value twice. - Restarting the timer makes it valid again. + Calling this function on a QElapsedTimer that is invalid + results in undefined behavior. The following example illustrates how to use this function to calibrate a parameter to a slow operation (for example, an iteration count) so that @@ -93,7 +94,7 @@ void QElapsedTimer::start() Q_DECL_NOTHROW \snippet qelapsedtimer/main.cpp 3 - \sa start(), invalidate(), elapsed() + \sa start(), invalidate(), elapsed(), isValid() */ qint64 QElapsedTimer::restart() Q_DECL_NOTHROW { @@ -106,8 +107,10 @@ qint64 QElapsedTimer::restart() Q_DECL_NOTHROW /*! \since 4.8 Returns the number of nanoseconds since this QElapsedTimer was last - started. Calling this function in a QElapsedTimer that was invalidated - will result in undefined results. + started. + + Calling this function on a QElapsedTimer that is invalid + results in undefined behavior. On platforms that do not provide nanosecond resolution, the value returned will be the best estimate available. @@ -121,10 +124,12 @@ qint64 QElapsedTimer::nsecsElapsed() const Q_DECL_NOTHROW /*! Returns the number of milliseconds since this QElapsedTimer was last - started. Calling this function in a QElapsedTimer that was invalidated - will result in undefined results. + started. - \sa start(), restart(), hasExpired(), invalidate() + Calling this function on a QElapsedTimer that is invalid + results in undefined behavior. + + \sa start(), restart(), hasExpired(), isValid(), invalidate() */ qint64 QElapsedTimer::elapsed() const Q_DECL_NOTHROW { @@ -172,7 +177,8 @@ qint64 QElapsedTimer::msecsTo(const QElapsedTimer &other) const Q_DECL_NOTHROW \a other was started before this object, the returned value will be negative. If it was started later, the returned value will be positive. - The return value is undefined if this object or \a other were invalidated. + Calling this function on or with a QElapsedTimer that is invalid + results in undefined behavior. \sa msecsTo(), elapsed() */ |