forked from 0ad/0ad
Yves
c02a7e1a7b
This upgrade also introduces exact stack rooting (see to the wiki: JSRootingGuide) and fixes problems with moving GC. This allows us to enable generational garbage collection (GGC). Measurements a few months ago have shown a performance improvement of a non-visual replay of around 13.5%. This probably varies quite a bit, but it should be somewhere between 5-20%. Memory usage has also been improved. Check the forum thread for details. Thanks to everyone from the team who helped with this directly or indirectly (review, finding and fixing issues, the required C++11 upgrade, the new autobuilder etc.)! Also thanks to the SpiderMonkey developers who helped on the #jsapi channel or elsewhere! Fixes #2462, #2415, #2428, #2684, #1374 Refs #2973, #2669 This was SVN commit r16214.
207 lines
5.4 KiB
C++
207 lines
5.4 KiB
C++
/* Copyright (C) 2013 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_BINARYSERIALIZER
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#define INCLUDED_BINARYSERIALIZER
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#include "ISerializer.h"
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#include "scriptinterface/third_party/ObjectToIDMap.h"
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#include "lib/byte_order.h"
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#include "lib/allocators/arena.h"
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#include <map>
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/**
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* Wrapper for redirecting ostream writes to CBinarySerializer's impl
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*/
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template<typename T>
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class CSerializerStreamBuf : public std::streambuf
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{
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NONCOPYABLE(CSerializerStreamBuf);
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T& m_SerializerImpl;
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public:
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CSerializerStreamBuf(T& impl) :
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m_SerializerImpl(impl)
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{
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}
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std::streamsize xsputn(const char* s, std::streamsize n)
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{
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m_SerializerImpl.Put("stream", reinterpret_cast<const u8*> (s), n);
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return n;
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}
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};
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/**
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* PutScriptVal implementation details.
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* (Split out from the main class because it's too big to be inlined.)
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*/
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class CBinarySerializerScriptImpl
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{
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public:
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CBinarySerializerScriptImpl(ScriptInterface& scriptInterface, ISerializer& serializer);
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void ScriptString(const char* name, JS::HandleString string);
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void HandleScriptVal(JS::HandleValue val);
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void SetSerializablePrototypes(shared_ptr<ObjectIdCache<std::wstring> > prototypes);
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private:
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ScriptInterface& m_ScriptInterface;
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ISerializer& m_Serializer;
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ObjectIdCache<u32> m_ScriptBackrefs;
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u32 m_ScriptBackrefsNext;
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u32 GetScriptBackrefTag(JS::HandleObject obj);
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shared_ptr<ObjectIdCache<std::wstring> > m_SerializablePrototypes;
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bool IsSerializablePrototype(JS::HandleObject prototype);
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std::wstring GetPrototypeName(JS::HandleObject prototype);
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};
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/**
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* Serialize to a binary stream. T must just implement the Put() method.
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* (We use this templated approach to allow compiler inlining.)
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*/
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template <typename T>
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class CBinarySerializer : public ISerializer
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{
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NONCOPYABLE(CBinarySerializer);
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public:
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CBinarySerializer(ScriptInterface& scriptInterface) :
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m_ScriptImpl(new CBinarySerializerScriptImpl(scriptInterface, *this)),
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m_RawStreamBuf(m_Impl),
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m_RawStream(&m_RawStreamBuf)
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{
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}
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template <typename A>
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CBinarySerializer(ScriptInterface& scriptInterface, A& a) :
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m_ScriptImpl(new CBinarySerializerScriptImpl(scriptInterface, *this)),
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m_Impl(a),
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m_RawStreamBuf(m_Impl),
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m_RawStream(&m_RawStreamBuf)
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{
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}
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virtual void SetSerializablePrototypes(shared_ptr<ObjectIdCache<std::wstring> >& prototypes)
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{
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m_ScriptImpl->SetSerializablePrototypes(prototypes);
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}
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protected:
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/*
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The Put* implementations here are designed for subclasses
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that want an efficient, portable, deserializable representation.
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(Subclasses with different requirements should override these methods.)
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Numbers are converted to little-endian byte strings, for portability
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and efficiency.
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Data is not aligned, for storage efficiency.
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*/
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virtual void PutNumber(const char* name, uint8_t value)
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{
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m_Impl.Put(name, (const u8*)&value, sizeof(uint8_t));
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}
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virtual void PutNumber(const char* name, int8_t value)
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{
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m_Impl.Put(name, (const u8*)&value, sizeof(int8_t));
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}
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virtual void PutNumber(const char* name, uint16_t value)
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{
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uint16_t v = to_le16(value);
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m_Impl.Put(name, (const u8*)&v, sizeof(uint16_t));
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}
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virtual void PutNumber(const char* name, int16_t value)
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{
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int16_t v = (i16)to_le16((u16)value);
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m_Impl.Put(name, (const u8*)&v, sizeof(int16_t));
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}
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virtual void PutNumber(const char* name, uint32_t value)
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{
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uint32_t v = to_le32(value);
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m_Impl.Put(name, (const u8*)&v, sizeof(uint32_t));
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}
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virtual void PutNumber(const char* name, int32_t value)
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{
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int32_t v = (i32)to_le32((u32)value);
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m_Impl.Put(name, (const u8*)&v, sizeof(int32_t));
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}
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virtual void PutNumber(const char* name, float value)
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{
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m_Impl.Put(name, (const u8*)&value, sizeof(float));
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}
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virtual void PutNumber(const char* name, double value)
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{
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m_Impl.Put(name, (const u8*)&value, sizeof(double));
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}
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virtual void PutNumber(const char* name, fixed value)
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{
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int32_t v = (i32)to_le32((u32)value.GetInternalValue());
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m_Impl.Put(name, (const u8*)&v, sizeof(int32_t));
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}
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virtual void PutBool(const char* name, bool value)
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{
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NumberU8(name, value ? 1 : 0, 0, 1);
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}
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virtual void PutString(const char* name, const std::string& value)
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{
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// TODO: maybe should intern strings, particularly to save space with script property names
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PutNumber("string length", (uint32_t)value.length());
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m_Impl.Put(name, (u8*)value.data(), value.length());
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}
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virtual void PutScriptVal(const char* UNUSED(name), JS::MutableHandleValue value)
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{
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m_ScriptImpl->HandleScriptVal(value);
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}
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virtual void PutRaw(const char* name, const u8* data, size_t len)
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{
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m_Impl.Put(name, data, len);
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}
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virtual std::ostream& GetStream()
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{
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return m_RawStream;
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}
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protected:
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T m_Impl;
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private:
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std::auto_ptr<CBinarySerializerScriptImpl> m_ScriptImpl;
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CSerializerStreamBuf<T> m_RawStreamBuf;
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std::ostream m_RawStream;
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};
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#endif // INCLUDED_BINARYSERIALIZER
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