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refs #336 Delete CLogCategoryHandler when it is no longer used, and thread safety.

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This commit is contained in:
Mathew Sutcliffe
2014-10-12 20:25:35 +01:00
parent 4549e84e05
commit 09685e8b37
2 changed files with 31 additions and 1 deletions
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22
src/blackmisc/loghandler.h
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@@ -42,9 +42,11 @@ namespace BlackMisc
void install();
//! Return a category handler for subscribing to all messages with a category starting with the given prefix.
//! \warning This must only be called from the main thread.
CLogCategoryHandler *handlerForCategoryPrefix(const QString &prefix);
//! Enable or disable the default Qt handler.
//! \warning This must only be called from the main thread.
void enableConsoleOutput(bool enable);
signals:
@@ -82,15 +84,33 @@ namespace BlackMisc
/*!
* Enable or disable the default Qt handler for messages in relevant categories.
* This can override the setting of the parent CLogHandler.
* \warning This must only be called from the main thread.
*/
void enableConsoleOutput(bool enable) { m_enableFallThrough = enable; }
void enableConsoleOutput(bool enable) { Q_ASSERT(thread() == QThread::currentThread()); m_enableFallThrough = enable; }
signals:
/*!
* Emitted when a message is logged in a relevant category.
*
* When all slots are disconnected from this signal, the CLogCategoryHandler is allowed to delete itself.
*/
void messageLogged(const CStatusMessage &message);
/*!
* Emitted when there are no more slots connected to the messageLogged signal.
*/
void ps_canBeDeleted(CLogCategoryHandler *handler);
protected:
/*!
* \copydoc QObject::disconnectNotify
*/
virtual void disconnectNotify(const QMetaMethod &) override
{
static const QMetaMethod signal = QMetaMethod::fromSignal(&CLogCategoryHandler::messageLogged);
if (! isSignalConnected(signal)) { emit ps_canBeDeleted(this); }
}
private:
friend class CLogHandler;
CLogCategoryHandler(QObject *parent, bool enableFallThrough) : QObject(parent), m_enableFallThrough(enableFallThrough) {}