diff options
Diffstat (limited to 'src/qml/jsruntime/qv4compilationunitmapper.cpp')
-rw-r--r-- | src/qml/jsruntime/qv4compilationunitmapper.cpp | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/src/qml/jsruntime/qv4compilationunitmapper.cpp b/src/qml/jsruntime/qv4compilationunitmapper.cpp new file mode 100644 index 0000000000..e9915c7d26 --- /dev/null +++ b/src/qml/jsruntime/qv4compilationunitmapper.cpp @@ -0,0 +1,81 @@ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only + +#include "qv4compilationunitmapper_p.h" + +#include <private/qv4compileddata_p.h> + +#include <QtCore/qdatetime.h> +#include <QtCore/qmutex.h> +#include <QtCore/qhash.h> + +QT_BEGIN_NAMESPACE + +using namespace QV4; + +class StaticUnitCache +{ +public: + StaticUnitCache() : m_lock(&s_mutex) {} + + CompilationUnitMapper get(const QString &file) + { + const auto it = s_staticUnits.constFind(file); + return it == s_staticUnits.constEnd() ? CompilationUnitMapper() : *it; + } + + void set(const QString &file, const CompilationUnitMapper &staticUnit) { + s_staticUnits.insert(file, staticUnit); + } + + void remove(const QString &file) + { + s_staticUnits.remove(file); + } + +private: + QMutexLocker<QMutex> m_lock; + + static QMutex s_mutex; + + // We can copy the mappers around because they're all static. + // We never unmap the files. + static QHash<QString, CompilationUnitMapper> s_staticUnits; +}; + +QHash<QString, CompilationUnitMapper> StaticUnitCache::s_staticUnits; +QMutex StaticUnitCache::s_mutex; + +CompiledData::Unit *CompilationUnitMapper::get( + const QString &cacheFilePath, const QDateTime &sourceTimeStamp, QString *errorString) +{ + StaticUnitCache cache; + + CompilationUnitMapper mapper = cache.get(cacheFilePath); + if (mapper.dataPtr) { + auto *unit = reinterpret_cast<CompiledData::Unit *>(mapper.dataPtr); + if (unit->verifyHeader(sourceTimeStamp, errorString)) { + *this = mapper; + return unit; + } + + return nullptr; + } + + CompiledData::Unit *data = open(cacheFilePath, sourceTimeStamp, errorString); + if (data && (data->flags & CompiledData::Unit::StaticData)) { + cache.set(cacheFilePath, *this); + return data; + } else { + close(); + return nullptr; + } +} + +void CompilationUnitMapper::invalidate(const QString &cacheFilePath) +{ + StaticUnitCache cache; + cache.remove(cacheFilePath); +} + +QT_END_NAMESPACE |