mirror of
https://gitea.wildfiregames.com/0ad/0ad
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85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
/* Copyright (C) 2020 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_SCRIPTVAL
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#define INCLUDED_SCRIPTVAL
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#include "ScriptTypes.h"
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/**
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* A default constructible wrapper around JS::PersistentRootedValue
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*
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* It's a very common case that we need to store JS::Values on the heap as
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* class members and only need them conditionally or want to initialize
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* them after the constructor because we don't have the runtime available yet.
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* Use it in these cases, but prefer to use JS::PersistentRootedValue directly
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* if initializing it with a runtime/context in the constructor isn't a problem.
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*/
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template <typename T>
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class DefPersistentRooted
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{
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public:
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DefPersistentRooted()
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{
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}
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DefPersistentRooted(JSRuntime* rt)
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{
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m_Val.reset(new JS::PersistentRooted<T>(rt));
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}
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DefPersistentRooted(JSRuntime* rt, JS::HandleValue val)
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{
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m_Val.reset(new JS::PersistentRooted<T>(rt, val));
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}
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DefPersistentRooted(JSContext* cx, JS::Handle<T> val)
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{
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m_Val.reset(new JS::PersistentRooted<T>(cx, val));
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}
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void clear()
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{
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m_Val = nullptr;
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}
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inline bool uninitialized()
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{
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return m_Val == nullptr;
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}
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inline JS::PersistentRooted<T>& get() const
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{
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ENSURE(m_Val);
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return *m_Val;
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}
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inline void set(JSRuntime* rt, T val)
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{
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m_Val.reset(new JS::PersistentRooted<T>(rt, val));
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}
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inline void set(JSContext* cx, T val)
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{
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m_Val.reset(new JS::PersistentRooted<T>(cx, val));
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}
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private:
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std::unique_ptr<JS::PersistentRooted<T> > m_Val;
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};
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#endif // INCLUDED_SCRIPTVAL
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