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QFontCache: Make clear() really clear/free cached data it maintains

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QFontCache::clear() now frees everything it keeps and resets the cache costs.

Change-Id: I23ac2cab5c7c7d70db03f048b6fde151a18f92e1
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: jian liang <jianliang79@gmail.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
This commit is contained in:
Konstantin Ritt 2013-04-12 15:23:22 +03:00 committed by The Qt Project
parent be08ef6131
commit 4f400eeec1
1 changed files with 28 additions and 22 deletions
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50
src/gui/text/qfont.cpp
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@ -2639,18 +2639,6 @@ QFontCache::QFontCache()
QFontCache::~QFontCache()
{
clear();
{
EngineDataCache::ConstIterator it = engineDataCache.constBegin(),
end = engineDataCache.constEnd();
while (it != end) {
if (!it.value()->ref.deref())
delete it.value();
else
FC_DEBUG("QFontCache::~QFontCache: engineData %p still has refcount %d",
it.value(), it.value()->ref.load());
++it;
}
}
}
void QFontCache::clear()
@ -2669,29 +2657,47 @@ void QFontCache::clear()
data->engines[i] = 0;
}
}
if (!data->ref.deref()) {
delete data;
} else {
FC_DEBUG("QFontCache::clear: engineData %p still has refcount %d",
data, data->ref.load());
}
++it;
}
}
bool mightHaveEnginesLeftForCleanup = true;
while (mightHaveEnginesLeftForCleanup) {
engineDataCache.clear();
bool mightHaveEnginesLeftForCleanup;
do {
mightHaveEnginesLeftForCleanup = false;
for (EngineCache::Iterator it = engineCache.begin(), end = engineCache.end();
it != end; ++it) {
if (it.value().data && engineCacheCount.value(it.value().data) > 0) {
--engineCacheCount[it.value().data];
if (!it.value().data->ref.deref()) {
Q_ASSERT(engineCacheCount.value(it.value().data) == 0);
delete it.value().data;
mightHaveEnginesLeftForCleanup = true;
it != end; ++it) {
QFontEngine *engine = it.value().data;
if (engine) {
const int cacheCount = --engineCacheCount[engine];
Q_ASSERT(cacheCount >= 0);
if (!engine->ref.deref()) {
Q_ASSERT(cacheCount == 0);
mightHaveEnginesLeftForCleanup = engine->type() == QFontEngine::Multi;
delete engine;
} else if (cacheCount == 0) {
FC_DEBUG("QFontCache::clear: engine %p still has refcount %d",
engine, engine->ref.load());
}
it.value().data = 0;
}
}
}
} while (mightHaveEnginesLeftForCleanup);
engineCache.clear();
engineCacheCount.clear();
total_cost = 0;
max_cost = min_cost;
}