mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 13:23:56 -07:00
fcb1a4c121
- Move ScriptException to Script::Exception namespace. - Rename ScriptConversions, ScriptExceptions, ScriptForward and ScriptStats files to drop the redundant 'Script' prefix. - Rename ScriptForward.h to ForwardDeclarations.h as suggested. - Update all includes and references accordingly.
93 lines
3.3 KiB
C++
93 lines
3.3 KiB
C++
/* Copyright (C) 2026 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_SCRIPT_REQUEST
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#define INCLUDED_SCRIPT_REQUEST
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#include "scriptinterface/ForwardDeclarations.h"
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#include <js/RootingAPI.h>
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#include <js/TypeDecls.h>
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#include <memory>
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namespace JS { class Realm; }
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namespace JS { class Value; }
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namespace Script { class Interface; }
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struct JSContext;
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/**
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* Spidermonkey maintains some 'local' state via the JSContext* object.
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* This object is an argument to most JSAPI functions.
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* Furthermore, this state is Realm (~ global) dependent. For many reasons, including GC safety,
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* The JSContext* Realm must be set up correctly when accessing it.
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* 'Entering' and 'Leaving' realms must be done in a LIFO manner.
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* SM recommends using JSAutoRealm, which provides an RAII option.
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*
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* Script::Request combines both of the above in a single convenient package,
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* providing safe access to the JSContext*, the global object, and ensuring that the proper realm has been entered.
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* Most scriptinterface/ functions will take a Script::Request, to ensure proper rooting. You may sometimes
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* have to create one from a Script::Interface.
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*
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* Be particularly careful when manipulating several script interfaces.
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*/
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namespace Script
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{
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class Request
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{
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Request() = delete;
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Request(const Script::Request& rq) = delete;
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Request& operator=(const Script::Request& rq) = delete;
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public:
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/**
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* NB: the definitions are in scriptinterface.cpp, because these access members of the PImpled
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* implementation of Script::Interface, and that seemed more convenient.
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*/
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Request(const Script::Interface& scriptInterface);
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Request(const Script::Interface* scriptInterface) : Request(*scriptInterface) {}
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Request(std::shared_ptr<Script::Interface> scriptInterface) : Request(*scriptInterface) {}
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~Request();
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/**
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* Create a script request from a JSContext.
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* This can be used to get the script interface in a JSNative function.
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* In general, you shouldn't have to rely on this otherwise.
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*/
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Request(JSContext* cx);
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/**
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* Return the scriptInterface active when creating this Script::Request.
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* Note that this is multi-request safe: even if another Script::Request is created,
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* it will point to the original scriptInterface, and thus can be used to re-enter the realm.
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*/
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const Script::Interface& GetScriptInterface() const;
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JS::Value globalValue() const;
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// Note that JSContext actually changes behind the scenes when creating another Script::Request for another realm,
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// so be _very_ careful when juggling between different realms.
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JSContext* cx;
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JS::HandleObject glob;
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JS::HandleObject nativeScope;
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private:
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const Script::Interface& m_ScriptInterface;
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JS::Realm* m_FormerRealm;
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};
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}
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#endif // INCLUDED_SCRIPT_REQUEST
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