vladislavbelov
ffc4a56b9f
Fixes #6846 Differential Revision: https://code.wildfiregames.com/D5185 This was SVN commit r27965.
62 lines
2.4 KiB
C++
62 lines
2.4 KiB
C++
/* Copyright (C) 2021 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_SCRIPTINTERFACE_STRUCTUREDCLONE
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#define INCLUDED_SCRIPTINTERFACE_STRUCTUREDCLONE
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#include "ScriptForward.h"
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#include <memory>
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class JSStructuredCloneData;
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namespace Script
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{
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/**
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* Structured clones are a way to serialize 'simple' JS::Values into a buffer
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* that can safely be passed between compartments and between threads.
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* A StructuredClone can be stored and read multiple times if desired.
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* We wrap them in shared_ptr so memory management is automatic and
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* thread-safe.
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*/
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using StructuredClone = std::shared_ptr<JSStructuredCloneData>;
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StructuredClone WriteStructuredClone(const ScriptRequest& rq, JS::HandleValue v);
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void ReadStructuredClone(const ScriptRequest& rq, const StructuredClone& ptr, JS::MutableHandleValue ret);
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/**
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* Construct a new value by cloning a value (possibly from a different Compartment).
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* Complex values (functions, XML, etc) won't be cloned correctly, but basic
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* types and cyclic references should be fine.
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* Takes ScriptInterfaces to enter the correct realm.
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* Caller beware - manipulating several compartments in the same function is tricky.
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* @param to - ScriptInterface of the target. Should match the rooting context of the result.
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* @param from - ScriptInterface of @a val.
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*/
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JS::Value CloneValueFromOtherCompartment(const ScriptInterface& to, const ScriptInterface& from, JS::HandleValue val);
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/**
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* Clone a JS value, ensuring that changes to the result
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* won't affect the original value.
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* Works by cloning, so the same restrictions as CloneValueFromOtherCompartment apply.
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*/
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JS::Value DeepCopy(const ScriptRequest& rq, JS::HandleValue val);
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} // namespace Script
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#endif // INCLUDED_SCRIPTINTERFACE_STRUCTUREDCLONE
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