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Merge pull request #311 from odysseus654/pr/webpage-restrict-from-polling

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[shutdown-deadlock] Restructure ContextAwareProfile from polling to notifications
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kasenvr 2020-09-12 22:17:50 -04:00 committed by GitHub
commit e6f3ba4458
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 66 additions and 17 deletions
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60
libraries/ui/src/ui/types/ContextAwareProfile.cpp
View file

@ -12,7 +12,9 @@
#include "ContextAwareProfile.h"
#include <cassert>
#include <QtCore/QReadLocker>
#include <QtCore/QThread>
#include <QtCore/QWriteLocker>
#include <QtQml/QQmlContext>
#include <shared/QtHelpers.h>
@ -20,20 +22,63 @@
static const QString RESTRICTED_FLAG_PROPERTY = "RestrictFileAccess";
ContextAwareProfile::ContextAwareProfile(QQmlContext* context) :
ContextAwareProfileParent(context), _context(context) {
QReadWriteLock ContextAwareProfile::_contextMapProtect;
ContextAwareProfile::ContextMap ContextAwareProfile::_contextMap;
ContextAwareProfile::ContextAwareProfile(QQmlContext* context) : ContextAwareProfileParent(context), _context(context) {
assert(context);
{ // register our object for future updates
QWriteLocker guard(&_contextMapProtect);
ContextMap::iterator setLookup = _contextMap.find(_context);
if (setLookup == _contextMap.end()) {
setLookup = _contextMap.insert(_context, ContextAwareProfileSet());
}
assert(setLookup != _contextMap.end());
ContextAwareProfileSet& profileSet = setLookup.value();
assert(profileSet.find(this) == profileSet.end());
profileSet.insert(this);
}
_isRestricted.store(isRestrictedGetProperty());
}
ContextAwareProfile::~ContextAwareProfile() {
// deregister our object
QWriteLocker guard(&_contextMapProtect);
ContextMap::iterator setLookup = _contextMap.find(_context);
assert(setLookup != _contextMap.end());
if (setLookup != _contextMap.end()) {
ContextAwareProfileSet& profileSet = setLookup.value();
assert(profileSet.find(this) != profileSet.end());
profileSet.remove(this);
if (profileSet.isEmpty()) {
_contextMap.erase(setLookup);
}
}
}
void ContextAwareProfile::restrictContext(QQmlContext* context, bool restrict) {
// set the QML property
context->setContextProperty(RESTRICTED_FLAG_PROPERTY, restrict);
// broadcast the new value to any registered ContextAwareProfile objects
QReadLocker guard(&_contextMapProtect);
ContextMap::const_iterator setLookup = _contextMap.find(context);
if (setLookup != _contextMap.end()) {
const ContextAwareProfileSet& profileSet = setLookup.value();
for (ContextAwareProfileSet::const_iterator profileIterator = profileSet.begin();
profileIterator != profileSet.end(); profileIterator++) {
(*profileIterator)->_isRestricted.store(restrict);
}
}
}
bool ContextAwareProfile::isRestrictedInternal() {
bool ContextAwareProfile::isRestrictedGetProperty() {
if (QThread::currentThread() != thread()) {
bool restrictedResult = false;
BLOCKING_INVOKE_METHOD(this, "isRestrictedInternal", Q_RETURN_ARG(bool, restrictedResult));
BLOCKING_INVOKE_METHOD(this, "isRestrictedGetProperty", Q_RETURN_ARG(bool, restrictedResult));
return restrictedResult;
}
@ -48,10 +93,5 @@ bool ContextAwareProfile::isRestrictedInternal() {
}
bool ContextAwareProfile::isRestricted() {
auto now = usecTimestampNow();
if (now > _cacheExpiry) {
_cachedValue = isRestrictedInternal();
_cacheExpiry = now + MAX_CACHE_AGE;
}
return _cachedValue;
return _isRestricted.load();
}

23
libraries/ui/src/ui/types/ContextAwareProfile.h
View file

@ -11,7 +11,11 @@
#ifndef hifi_ContextAwareProfile_h
#define hifi_ContextAwareProfile_h
#include <QtCore/QtGlobal>
#include <atomic>
#include <QtCore/QHash>
#include <QtCore/QReadWriteLock>
#include <QtCore/QSet>
#include <QtCore/QSharedPointer>
#if !defined(Q_OS_ANDROID)
#include <QtWebEngine/QQuickWebEngineProfile>
@ -26,8 +30,6 @@ using ContextAwareProfileParent = QObject;
using RequestInterceptorParent = QObject;
#endif
#include <NumericalConstants.h>
class QQmlContext;
class ContextAwareProfile : public ContextAwareProfileParent {
@ -35,7 +37,7 @@ class ContextAwareProfile : public ContextAwareProfileParent {
public:
static void restrictContext(QQmlContext* context, bool restrict = true);
bool isRestricted();
Q_INVOKABLE bool isRestrictedInternal();
Q_INVOKABLE bool isRestrictedGetProperty();
protected:
class RequestInterceptor : public RequestInterceptorParent {
@ -47,10 +49,17 @@ protected:
};
ContextAwareProfile(QQmlContext* parent);
~ContextAwareProfile();
private:
typedef QSet<ContextAwareProfile*> ContextAwareProfileSet;
typedef QHash<QQmlContext*, ContextAwareProfileSet> ContextMap;
QQmlContext* _context{ nullptr };
bool _cachedValue{ false };
quint64 _cacheExpiry{ 0 };
constexpr static quint64 MAX_CACHE_AGE = MSECS_PER_SECOND;
std::atomic<bool> _isRestricted{ false };
static QReadWriteLock _contextMapProtect;
static ContextMap _contextMap;
};
#endif // hifi_FileTypeProfile_h