diff options
| author | Marc Mutz <marc.mutz@kdab.com> | 2015-11-12 10:16:22 +0100 |
|---|---|---|
| committer | Marc Mutz <marc.mutz@kdab.com> | 2015-11-29 22:59:17 +0000 |
| commit | 51089a5742a79467221b5781cb35a8cea023febf (patch) | |
| tree | 95f765fa452cdfaa12f986e4d228d9a958c95100 /src/widgets/kernel/qwidget.cpp | |
| parent | 14d189f7875b7def6f9745bfd20527a0fce19a44 (diff) | |
Use Q_UNLIKELY for every qFatal()/qCritical()
If, after checking a condition, we issue a qFatal()
or a qCritical(), by definition that check is
unlikely to be true.
Tell the compiler so it can move the error handling
code out of the normal code path to increase the
effective icache size.
Moved conditional code around where possible so that
we could always use Q_UNLIKELY, instead of having to
revert to Q_LIKELY here and there.
In some cases, simplified the expressions newly wrapped
in Q_UNLIKELY as a drive-by.
Change-Id: I67537d62b04bc6977d69254690c5ebbdf98bfd6d
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>
Diffstat (limited to 'src/widgets/kernel/qwidget.cpp')
| -rw-r--r-- | src/widgets/kernel/qwidget.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp index 308403175a..fbaa14a2b2 100644 --- a/src/widgets/kernel/qwidget.cpp +++ b/src/widgets/kernel/qwidget.cpp @@ -289,7 +289,7 @@ QWidgetPrivate::QWidgetPrivate(int version) , qd_hd(0) #endif { - if (!qApp) { + if (Q_UNLIKELY(!qApp)) { qFatal("QWidget: Must construct a QApplication before a QWidget"); return; } @@ -299,7 +299,7 @@ QWidgetPrivate::QWidgetPrivate(int version) // This allows incompatible versions to be loaded, possibly for testing. Q_UNUSED(version); #else - if (version != QObjectPrivateVersion) + if (Q_UNLIKELY(version != QObjectPrivateVersion)) qFatal("Cannot mix incompatible Qt library (version 0x%x) with this library (version 0x%x)", version, QObjectPrivateVersion); #endif @@ -1116,7 +1116,7 @@ void QWidgetPrivate::adjustFlags(Qt::WindowFlags &flags, QWidget *w) void QWidgetPrivate::init(QWidget *parentWidget, Qt::WindowFlags f) { Q_Q(QWidget); - if (!qobject_cast<QApplication *>(QCoreApplication::instance())) + if (Q_UNLIKELY(!qobject_cast<QApplication *>(QCoreApplication::instance()))) qFatal("QWidget: Cannot create a QWidget without QApplication"); Q_ASSERT(allWidgets); |