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Diffstat (limited to 'src/qml/memory/qv4mm_p.h')
| -rw-r--r-- | src/qml/memory/qv4mm_p.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/qml/memory/qv4mm_p.h b/src/qml/memory/qv4mm_p.h new file mode 100644 index 0000000000..422809ba54 --- /dev/null +++ b/src/qml/memory/qv4mm_p.h @@ -0,0 +1,187 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the QtQml module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see http://www.qt.io/terms-conditions. For further +** information use the contact form at http://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** As a special exception, The Qt Company gives you certain additional +** rights. These rights are described in The Qt Company LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QV4GC_H +#define QV4GC_H + +#include <private/qv4global_p.h> +#include <private/qv4value_p.h> +#include <private/qv4scopedvalue_p.h> + +//#define DETAILED_MM_STATS + +QT_BEGIN_NAMESPACE + +namespace QV4 { + +struct GCDeletable; + +class Q_QML_EXPORT MemoryManager +{ + Q_DISABLE_COPY(MemoryManager); + +public: + struct Data; + + class GCBlocker + { + public: + GCBlocker(MemoryManager *mm) + : mm(mm) + , wasBlocked(mm->isGCBlocked()) + { + mm->setGCBlocked(true); + } + + ~GCBlocker() + { + mm->setGCBlocked(wasBlocked); + } + + private: + MemoryManager *mm; + bool wasBlocked; + }; + +public: + MemoryManager(ExecutionEngine *engine); + ~MemoryManager(); + + // TODO: this is only for 64bit (and x86 with SSE/AVX), so exend it for other architectures to be slightly more efficient (meaning, align on 8-byte boundaries). + // Note: all occurrences of "16" in alloc/dealloc are also due to the alignment. + static inline std::size_t align(std::size_t size) + { return (size + 15) & ~0xf; } + + template<typename ManagedType> + inline typename ManagedType::Data *allocManaged(std::size_t size) + { + size = align(size); + Heap::Base *o = allocData(size); + o->vtable = ManagedType::staticVTable(); + return static_cast<typename ManagedType::Data *>(o); + } + + template <typename ManagedType> + typename ManagedType::Data *alloc() + { + Scope scope(engine()); + Scoped<ManagedType> t(scope, allocManaged<ManagedType>(sizeof(typename ManagedType::Data))); + (void)new (t->d()) typename ManagedType::Data(); + return t->d(); + } + + template <typename ManagedType, typename Arg1> + typename ManagedType::Data *alloc(Arg1 arg1) + { + Scope scope(engine()); + Scoped<ManagedType> t(scope, allocManaged<ManagedType>(sizeof(typename ManagedType::Data))); + (void)new (t->d()) typename ManagedType::Data(arg1); + return t->d(); + } + + template <typename ManagedType, typename Arg1, typename Arg2> + typename ManagedType::Data *alloc(Arg1 arg1, Arg2 arg2) + { + Scope scope(engine()); + Scoped<ManagedType> t(scope, allocManaged<ManagedType>(sizeof(typename ManagedType::Data))); + (void)new (t->d()) typename ManagedType::Data(arg1, arg2); + return t->d(); + } + + template <typename ManagedType, typename Arg1, typename Arg2, typename Arg3> + typename ManagedType::Data *alloc(Arg1 arg1, Arg2 arg2, Arg3 arg3) + { + Scope scope(engine()); + Scoped<ManagedType> t(scope, allocManaged<ManagedType>(sizeof(typename ManagedType::Data))); + (void)new (t->d()) typename ManagedType::Data(arg1, arg2, arg3); + return t->d(); + } + + template <typename ManagedType, typename Arg1, typename Arg2, typename Arg3, typename Arg4> + typename ManagedType::Data *alloc(Arg1 arg1, Arg2 arg2, Arg3 arg3, Arg4 arg4) + { + Scope scope(engine()); + Scoped<ManagedType> t(scope, allocManaged<ManagedType>(sizeof(typename ManagedType::Data))); + (void)new (t->d()) typename ManagedType::Data(arg1, arg2, arg3, arg4); + return t->d(); + } + + template <typename ManagedType, typename Arg1, typename Arg2, typename Arg3, typename Arg4, typename Arg5> + typename ManagedType::Data *alloc(Arg1 arg1, Arg2 arg2, Arg3 arg3, Arg4 arg4, Arg5 arg5) + { + Scope scope(engine()); + Scoped<ManagedType> t(scope, allocManaged<ManagedType>(sizeof(typename ManagedType::Data))); + (void)new (t->d()) typename ManagedType::Data(arg1, arg2, arg3, arg4, arg5); + return t->d(); + } + + bool isGCBlocked() const; + void setGCBlocked(bool blockGC); + void runGC(); + + ExecutionEngine *engine() const; + + void dumpStats() const; + + void registerDeletable(GCDeletable *d); + + size_t getUsedMem() const; + size_t getAllocatedMem() const; + size_t getLargeItemsMem() const; + +protected: + /// expects size to be aligned + // TODO: try to inline + Heap::Base *allocData(std::size_t size); + +#ifdef DETAILED_MM_STATS + void willAllocate(std::size_t size); +#endif // DETAILED_MM_STATS + +private: + void collectFromJSStack() const; + void mark(); + void sweep(bool lastSweep = false); + +protected: + QScopedPointer<Data> m_d; +public: + PersistentValueStorage *m_persistentValues; + PersistentValueStorage *m_weakValues; +}; + +} + +QT_END_NAMESPACE + +#endif // QV4GC_H |