diff options
Diffstat (limited to 'src/corelib/io/qloggingcategory.cpp')
| -rw-r--r-- | src/corelib/io/qloggingcategory.cpp | 54 |
1 files changed, 47 insertions, 7 deletions
diff --git a/src/corelib/io/qloggingcategory.cpp b/src/corelib/io/qloggingcategory.cpp index bdae7e7f50..10763dd65a 100644 --- a/src/corelib/io/qloggingcategory.cpp +++ b/src/corelib/io/qloggingcategory.cpp @@ -20,7 +20,8 @@ Q_GLOBAL_STATIC(QLoggingCategory, qtDefaultCategory, qtDefaultCategoryName) QLoggingCategory represents a certain logging category - identified by a string - at runtime. A category can be configured to enable or disable - logging of messages per message type. + logging of messages per message type. An exception are fatal messages, + which are always enabled. To check whether a message type is enabled or not, use one of these methods: \l isDebugEnabled(), \l isInfoEnabled(), \l isWarningEnabled(), and @@ -79,7 +80,7 @@ Q_GLOBAL_STATIC(QLoggingCategory, qtDefaultCategory, qtDefaultCategoryName) If no argument is passed, all messages are logged. Only Qt internal categories which start with \c{qt} are handled differently: For these, only messages of type - \c QtInfoMsg, \c QtWarningMsg, and \c QtCriticalMsg are logged by default. + \c QtInfoMsg, \c QtWarningMsg, \c QtCriticalMsg, and \c QFatalMsg are logged by default. \note Logging categories are not affected by your C++ build configuration. That is, whether messages are printed does not change depending on whether @@ -292,7 +293,7 @@ void QLoggingCategory::setEnabled(QtMsgType type, bool enable) Returns the object itself. This allows for both: a QLoggingCategory variable, and a factory method that returns a QLoggingCategory, to be used in \l qCDebug(), - \l qCWarning(), or \l qCCritical() macros. + \l qCWarning(), \l qCCritical(), or \l qCFatal() macros. */ /*! @@ -300,7 +301,7 @@ void QLoggingCategory::setEnabled(QtMsgType type, bool enable) Returns the object itself. This allows for both: a QLoggingCategory variable, and a factory method that returns a QLoggingCategory, to be used in \l qCDebug(), - \l qCWarning(), or \l qCCritical() macros. + \l qCWarning(), \l qCCritical(), or \l qCFatal() macros. */ /*! @@ -556,6 +557,46 @@ void QLoggingCategory::setFilterRules(const QString &rules) \sa qCritical() */ + +/*! + \macro qCFatal(category) + \relates QLoggingCategory + \since 6.5 + + Returns an output stream for fatal messages in the logging category, + \a category. + + If you are using the \b{default message handler}, the returned stream will abort + to create a core dump. On Windows, for debug builds, this function will + report a \c _CRT_ERROR enabling you to connect a debugger to the application. + + Example: + + \snippet qloggingcategory/main.cpp 16 + + \sa qFatal() +*/ + +/*! + \macro qCFatal(category, const char *message, ...) + \relates QLoggingCategory + \since 6.5 + + Logs a fatal message, \a message, in the logging category, \a category. + \a message may contain place holders to be replaced by additional arguments, + similar to the C printf() function. + + Example: + + \snippet qloggingcategory/main.cpp 17 + + If you are using the \b{default message handler}, this function will abort + to create a core dump. On Windows, for debug builds, this function will + report a \c _CRT_ERROR enabling you to connect a debugger to the application. + + \sa qFatal() +*/ + /*! \macro Q_DECLARE_LOGGING_CATEGORY(name) \sa Q_LOGGING_CATEGORY(), Q_DECLARE_EXPORTED_LOGGING_CATEGORY() @@ -585,7 +626,7 @@ void QLoggingCategory::setFilterRules(const QString &rules) For example: \code - Q_DECLARE_EXPORTED_LOGGING_CATEGORY("lib.core", LIB_EXPORT_MACRO) + Q_DECLARE_EXPORTED_LOGGING_CATEGORY(lcCore, LIB_EXPORT_MACRO) \endcode This macro must be used outside of a class or function. @@ -621,8 +662,7 @@ void QLoggingCategory::setFilterRules(const QString &rules) with a specific name. The implicitly-defined QLoggingCategory object is created on first use, in a thread-safe manner. - This macro must be used outside of a class or method. It is only defined - if variadic macros are supported. + This macro must be used outside of a class or method. */ QT_END_NAMESPACE |