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Ref T292, Ref T285 cache singleShot guard

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This commit is contained in:
Klaus Basan
2018-07-27 01:15:57 +02:00
parent ceaad53375
commit c253520f4a
1 changed files with 14 additions and 5 deletions
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19
src/blackmisc/datacache.h
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@@ -34,6 +34,7 @@
#include <QMutex> #include <QMutex>
#include <QObject> #include <QObject>
#include <QSet> #include <QSet>
#include <QPointer>
#include <QString> #include <QString>
#include <QStringList> #include <QStringList>
#include <QUuid> #include <QUuid>
@@ -312,7 +313,7 @@ namespace BlackMisc
* \tparam Trait A subclass of BlackMisc::TDataTrait that identifies the value's key and other metadata. * \tparam Trait A subclass of BlackMisc::TDataTrait that identifies the value's key and other metadata.
*/ */
template <typename Trait> template <typename Trait>
class CData : public BlackMisc::CCached<typename Trait::type> class CData : public CCached<typename Trait::type>
{ {
public: public:
//! Constructor. //! Constructor.
@@ -327,9 +328,9 @@ namespace BlackMisc
return; return;
} }
if (Trait::timeToLive() >= 0) { CDataCache::instance()->setTimeToLive(this->getKey(), Trait::timeToLive()); } if (Trait::timeToLive() >= 0) { CDataCache::instance()->setTimeToLive(this->getKey(), Trait::timeToLive()); }
if (Trait::isPinned()) { CDataCache::instance()->pinValue(this->getKey()); } if (Trait::isPinned()) { CDataCache::instance()->pinValue(this->getKey()); }
if (Trait::isDeferred()) { CDataCache::instance()->deferValue(this->getKey()); } if (Trait::isDeferred()) { CDataCache::instance()->deferValue(this->getKey()); }
if (Trait::isSession()) { CDataCache::instance()->sessionValue(this->getKey()); } if (Trait::isSession()) { CDataCache::instance()->sessionValue(this->getKey()); }
static_assert(!(Trait::isPinned() && Trait::isDeferred()), "trait can not be both pinned and deferred"); static_assert(!(Trait::isPinned() && Trait::isDeferred()), "trait can not be both pinned and deferred");
} }
@@ -382,7 +383,7 @@ namespace BlackMisc
//! If the value is currently being loaded, wait for it to finish loading, and call the notification slot, if any. //! If the value is currently being loaded, wait for it to finish loading, and call the notification slot, if any.
void synchronize() void synchronize()
{ {
// does not compile on gcc without this -> this->m_page // does not compile on gcc without "this" -> this->m_page
auto *queue = this->m_page->template findChild<Private::CDataPageQueue *>(); auto *queue = this->m_page->template findChild<Private::CDataPageQueue *>();
Q_ASSERT(queue); Q_ASSERT(queue);
this->admit(); this->admit();
@@ -393,7 +394,15 @@ namespace BlackMisc
// run in page thread // run in page thread
//! \todo KB 2018-01 is this OK or should it go to CValuePage::setValuesFromCache? //! \todo KB 2018-01 is this OK or should it go to CValuePage::setValuesFromCache?
if (CThreadUtils::isCurrentThreadObjectThread(this->m_page)) { queue->setQueuedValueFromCache(key); } if (CThreadUtils::isCurrentThreadObjectThread(this->m_page)) { queue->setQueuedValueFromCache(key); }
else { QTimer::singleShot(0, queue, [ = ] { queue->setQueuedValueFromCache(key); }); } else
{
QPointer<QObject> myself(queue);
QTimer::singleShot(0, queue, [ = ]
{
if (!myself) { return; }
queue->setQueuedValueFromCache(key);
});
}
} }
//! Data cache doesn't support setAndSave (because set() already causes save anyway). //! Data cache doesn't support setAndSave (because set() already causes save anyway).