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wraitii
ee0d204bf6
JSAutoRequest is required before calling into most JSAPI methods, for GC reasons. Calling it is required and fragile as one must not forget. Further, SM52 and later make manipulating JSContext* dangerous as that can cross Compartment(Realm in SM68) barriers (and ScriptInterface now matches a Compartment). The solution to both problems is to avoid using JSContext* in 0 A.D. itself. To achieve this, a Request class is introduced, and must be used to access a JSContext* from a scriptInterface. Further, Request is passed to other ScriptInterface functions isntead of JSContext*, making it obvious that the caller has already called it, reducing errors and redundant JSAutoRequest calls. Only JSNative functions now get a naked JSContext* without protection, but the likelihood of forgetting a request is lower since many ScriptInterface functions now expect it. JSContext* is directly passed to JSAPI functions only. Part of the SM52 migration, stage: SM45 compatible Based on a patch by: Itms Tested By: Freagarach Refs #4893 Differential Revision: https://code.wildfiregames.com/D3088 This was SVN commit r24176.
88 lines
2.8 KiB
C++
88 lines
2.8 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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#include "precompiled.h"
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#include "ICmpAIManager.h"
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#include "simulation2/system/InterfaceScripted.h"
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#include "lib/file/vfs/vfs_util.h"
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#include "ps/Filesystem.h"
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BEGIN_INTERFACE_WRAPPER(AIManager)
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DEFINE_INTERFACE_METHOD_4("AddPlayer", void, ICmpAIManager, AddPlayer, std::wstring, player_id_t, uint8_t, std::wstring)
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DEFINE_INTERFACE_METHOD_0("TryLoadSharedComponent", void, ICmpAIManager, TryLoadSharedComponent)
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DEFINE_INTERFACE_METHOD_0("RunGamestateInit", void, ICmpAIManager, RunGamestateInit)
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END_INTERFACE_WRAPPER(AIManager)
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// Implement the static method that finds all AI scripts
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// that can be loaded via AddPlayer:
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struct GetAIsHelper
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{
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NONCOPYABLE(GetAIsHelper);
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public:
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GetAIsHelper(const ScriptInterface& scriptInterface) :
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m_ScriptInterface(scriptInterface),
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m_AIs(scriptInterface.GetJSRuntime())
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{
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ScriptInterface::Request rq(m_ScriptInterface);
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m_AIs = JS_NewArrayObject(rq.cx, 0);
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}
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void Run()
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{
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vfs::ForEachFile(g_VFS, L"simulation/ai/", Callback, (uintptr_t)this, L"*.json", vfs::DIR_RECURSIVE);
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}
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static Status Callback(const VfsPath& pathname, const CFileInfo& UNUSED(fileInfo), const uintptr_t cbData)
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{
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GetAIsHelper* self = (GetAIsHelper*)cbData;
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ScriptInterface::Request rq(self->m_ScriptInterface);
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// Extract the 3rd component of the path (i.e. the directory after simulation/ai/)
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fs::wpath components = pathname.string();
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fs::wpath::iterator it = components.begin();
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std::advance(it, 2);
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std::wstring dirname = GetWstringFromWpath(*it);
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JS::RootedValue ai(rq.cx);
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ScriptInterface::CreateObject(rq, &ai);
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JS::RootedValue data(rq.cx);
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self->m_ScriptInterface.ReadJSONFile(pathname, &data);
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self->m_ScriptInterface.SetProperty(ai, "id", dirname, true);
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self->m_ScriptInterface.SetProperty(ai, "data", data, true);
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u32 length;
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JS_GetArrayLength(rq.cx, self->m_AIs, &length);
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JS_SetElement(rq.cx, self->m_AIs, length, ai);
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return INFO::OK;
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}
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JS::PersistentRootedObject m_AIs;
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const ScriptInterface& m_ScriptInterface;
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};
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JS::Value ICmpAIManager::GetAIs(const ScriptInterface& scriptInterface)
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{
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GetAIsHelper helper(scriptInterface);
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helper.Run();
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return JS::ObjectValue(*helper.m_AIs);
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}
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